Dental surveyor and surveying method

Abstract

To provide a dental surveyor that enables a user to quickly perform surveying calibration and a surveying method of the dental surveyor.SOLUTION: A shaft center seat 12, a first surveying arm 13, and a second surveying arm 14 are pivotable with respect to one another. The second surveying arm includes a surveyor rod 15. The surveyor rod includes a surveying needle 151 for surveying a denture mold 30. A surveyor table includes a clamp table 21 and an adjustment platform 22. The surveyor table is placed on a platform. The clamp table is used to clamp the denture mold. Angle and direction of the clamp table are changed by the adjustment platform. Three adjustment screws O, P, Q are fixed onto the adjustment platform. By advancement and retreat of the adjustment screws, a height of a corresponding portion of the clamp table is changed, an effect of three-point positioning adjustment on the denture mold is exhibited and the angle of the denture mold is accurately adjusted.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a dental surveyor and a surveying method, and more particularly to a dental surveyor that allows a user to quickly calibrate the surveying, and a surveying method that determines, records, and reproduces the path of insertion and removal of a dental impression on a dental surveyor. [Background technology]

[0002] People only have one set of permanent teeth in their lifetime. Once damaged, they cannot be replaced. As the average life expectancy of the population increases, dental health issues also require greater attention. There are many dental abnormalities and diseases, the most common of which are premature tooth loss due to tooth decay, periodontal disease, or external forces. The cavity created by tooth extraction affects the surrounding healthy teeth. Losing support from the same row of teeth gradually loosens and causes the surrounding teeth to fall out, creating a vicious cycle for all teeth. Therefore, timely dentures are necessary. Traditional denture methods include more expensive implants, fixed bridges, crowns, and removable partial dentures. Because the shape of teeth, mouth shape, and gum condition vary from person to person, it is necessary to take impressions of the patient's teeth to facilitate the subsequent fabrication of dentures, bridges, crowns, and removable partial dentures.

[0003] Denture fabrication requires cooperation between doctors and dental technicians. Bridges, crowns, removable partial dentures, and other devices all require a path of insertion and removal. If the angle or direction is incorrect, bridges, crowns, and removable partial dentures cannot be inserted smoothly. Therefore, when doctors and dental technicians work together, they must confirm that the angle and direction of the dental impressions are consistent. Therefore, a surveyor that can check the height and ensure that the positioning points on the impressions are consistent and also has an adjustment function is necessary. This allows dental technicians to obtain the exact orientation of the impressions specified by the doctor, avoiding problems with the insertion angle during subsequent processing of dentures, bridges, crowns, removable partial dentures, and other devices.

[0004] To improve the design efficiency of the doctor and the processing efficiency of the dental technician, it is also necessary to increase the positioning speed of the surveying, so that, under the premise of acceptable accuracy and error values, the positioning points on the dental impression can be surveyed by a surveyor to match the angle and direction of the dental impression made by the doctor and dental technician, reducing the amount of preparatory work and time wasted and improving efficiency.

[0005] As shown in Figure 26, the surveyor table 91 of a conventional dental surveyor 90 has a structure with only one ball joint 92. When determining, recording, and reproducing the insertion and removal paths of dental impressions using the conventional dental surveyor 90, the movement of the ball joint 92 often causes the movement of the ball joint 92 to change the initially determined direction when determining another direction after determining one direction. When tripoding three points to be at the same height on the conventional dental surveyor 90, the relationship between the two points that were originally at the same height often changes when adjusting the height of another point after adjusting two points to be at the same height. Therefore, it is extremely difficult to determine, record, and reproduce the insertion and removal paths of dental impressions using the conventional dental surveyor 90, and this not only reduces the accuracy of denture fabrication, but also affects the patient's experience.

[0006] In view of this situation, the inventor came up with a new idea, designed it based on his many years of experience, and after much discussion, prototyping, and many modifications and improvements, devised the present invention. Summary of the Invention [Problem to be solved by the invention]

[0007] The technical problem to be solved by the present invention is to provide a dental surveyor and a surveying method thereof that allows a user to quickly calibrate the surveying, in response to the above-mentioned problems of the prior art. [Means for solving the problem]

[0008] The present invention provides the following dental surveyor: That is, a dental surveyor including a surveyor and a surveyor table, wherein the surveyor includes a platform, a pivot seat, a first surveying arm, a second surveying arm, and a surveyor rod, the pivot seat is fixed on the platform, the first surveying arm is pivoted to the pivot seat, and the second surveying arm is pivoted to the first surveying arm, so that the pivot seat, the first surveying arm, and the second surveying arm pivot relative to each other, the second surveying arm is provided with the surveyor rod, and the surveyor rod is provided with a surveying needle for surveying a dental impression, the surveyor table includes a clamp table and an adjustment platform, the surveyor table is placed on the platform, the clamp table is used to clamp the dental impression, and the clamp a spherical rotating part is provided at the bottom of the clamping table; a fine-tuning part is provided in the center of the adjustment platform; a fine-tuning knob is fixed to the fine-tuning part; the rotating part is clamped on the fine-tuning part; rotating the fine-tuning knob can loosen the fine-tuning part, thereby adjusting the rotating part to change the angle and direction of the clamping table; a top housing is provided on the top of the adjustment platform to limit the position of the rotating part; a first adjusting screw, a second adjusting screw, and a third adjusting screw are fixed on the adjustment platform; moving the first adjusting screw, the second adjusting screw, or the third adjusting screw forward or backward changes the height of the tooth mold on the clamping table corresponding to the first adjusting screw, the second adjusting screw, or the third adjusting screw, thereby achieving the effect of three-point positioning adjustment.

[0009] Furthermore, the pivot seat is fixed on the platform, a pivot shaft is provided at the top of the pivot seat, a shaft hole and a first pivot hole are passed through the first surveying arm, a first mounting hole and a second mounting hole are opened on the side surfaces of the shaft hole and the first pivot hole, respectively, the pivot shaft of the pivot seat is provided in the shaft hole, a second pivot hole and a surveyor rod hole are passed through the second surveying arm, a third mounting hole and three fourth mounting holes are opened on the side surfaces of the second pivot hole and the surveyor rod hole, respectively, A surveyor rod bushing is provided in the ear rod hole, and a plurality of ball spring screws are fixed to the plurality of fourth mounting holes, thereby incorporating the surveyor rod bushing into the fourth mounting hole, a surveyor rod is provided in the surveyor rod bushing, a surveying needle for surveying tooth profiles is provided on the surveyor rod, and a top stopper is fixed to the top of the surveyor rod, and the top stopper abuts against the surveyor rod bushing, thereby limiting the range of movement of the surveyor rod, and the upper and lower fourth mounting holes are The ball spring screw is fixed in the hole, and the ball spring screw applies an average pressure to the surveyor rod, thereby eliminating the tolerance of the surveyor rod in the surveyor rod bushing and improving accuracy. A surveyor rod fixing screw is fixed in the fourth mounting hole in the middle so as to abut against the surveyor rod, and the position of the surveyor rod can be adjusted and fixed by tightening or loosening the surveyor rod fixing screw. A slide bushing is provided in each of the first pivot hole and the second pivot hole, and the two front a pivot shaft is passed through the slide bush, and a position set screw is fixed to abut against the pivot shaft to fix the pivot shaft in the second mounting hole, thereby allowing the pivot seat, the first surviving arm, and the second surviving arm to pivot relatively; the first surviving arm is fixed to the first mounting hole and the pivot shaft by a position set screw arm, thereby adjusting and fixing an angle between the pivot seat and the first surviving arm; and the second surviving arm is fixed to the third mounting hole by the position set screw arm;By abutting against the pivot shaft, the angle between the first and second surviving arms is adjusted and fixed, the pivot shaft and the top of the pivot shaft are provided with screw covers to limit the top position, the first and second surviving arms are provided with a plurality of washers, and a plurality of bearing parts enhance the smoothness of pivoting, thereby achieving a linked relationship in which the pivot seat, first and second surviving arms pivot to each other and maintaining accurate parallel and perpendicular relationships.

[0010] The present invention provides a surveying method for accurately determining the insertion and removal paths of a dental mold on a surveyor by performing the following steps: Adjust the angle and direction of the dental mold with the fine adjustment knob to initially determine the forward / backward and left / right inclination of the dental mold, and adjust the forward / backward and left / right directions of the dental mold so that they approach the positions of the first, second, and third adjusting screws, respectively, thereby adjusting the first, second, or third adjusting screws to adjust the forward / backward and left / right directions of the dental mold, and it can be confirmed that the insertion and removal paths of the dental mold can be accurately determined.

[0011] The present invention provides a surveying method for recording and reproducing the insertion and removal paths of dental impressions on a surveyor by performing the following steps. That is, in the step of recording the insertion and removal paths of the dental mold, the dentist surveys the dental mold on a dental surveyor, and then determines the direction and inclination of the dental mold, i.e., the insertion and removal paths, and uses the three-point contour positioning method to select three separated contour points on the surface of the dental mold to determine the first positioning point, the second positioning point, and the third positioning point. The dentist then hands the dental mold to a dental technician, who then reproduces the insertion and removal paths of the dental mold and manufactures the denture. In the step of reproducing the insertion and removal paths of the dental mold, the dental technician needs to reproduce the insertion and removal paths of the dental mold determined by the dentist on the dental surveyor before manufacturing the denture. The dental technician adjusts the position and angle of the dental mold on the dental surveyor to adjust the first positioning point, the second positioning point, and the third positioning point to the same height, thereby reproducing the insertion and removal paths of the dental mold.

[0012] The present invention provides a method for repositioning the insertion and extraction path of a dental mold on a surveyor by performing the following steps: Namely, the contour points selected on the surface of the dental mold, the first positioning point, the second positioning point, and the third positioning point are made to be at the same height. Step 1: Initial calibration. The first positioning point, the second positioning point, and the third positioning point form a triangle, and the angle and direction of the dental mold are adjusted by rotating the fine adjustment knob so that the three points approach the first adjustment screw, the second adjustment screw, and the third adjustment screw, respectively, while making the heights of the first positioning point, the second positioning point, and the third positioning point as close to the same height as possible, thereby completing the initial calibration. Step 2: Fine calibration. First, use the second adjusting screw as a reference, use the tip of the surveying needle to measure the height of the second positioning point, and adjust the height of the first positioning point by adjusting the first adjusting screw so that the first positioning point and the second positioning point are at the same height, check the height with the surveying needle, and again adjust the height of the third positioning point by adjusting the third adjusting screw so that the first positioning point and the third positioning point are at the same height, and then adjust the height of the first positioning point by adjusting the first adjusting screw so that the first positioning point and the second positioning point are at the same height, and after repeated adjustments, the first positioning point, the second positioning point, and the third positioning point are at the same height so that the tooth profile is at the correct angle and direction.

[0013] The main purpose of the dental surveyor of the present invention is to adjust the angle and direction of the dental impression by using the adjustment platform, and to quickly complete initial calibration by initially bringing the first positioning point, second positioning point, and third positioning point close to the first adjusting screw, second adjusting screw, and third adjusting screw, respectively, and to adjust the local height of the dental impression by using the first adjusting screw, second adjusting screw, or third adjusting screw, thereby enabling quick, intuitive, simple, and accurate three-point positioning; and the axial seat, first surveying arm, and second surveying arm are pivotable relative to each other, and can be used in conjunction with the surveying needle to quickly measure the heights of the first positioning point, second positioning point, and third positioning point to perform the surveying method, thereby improving efficiency.

[0014] The main purpose of the surviving method of the present invention is to adjust the first positioning point and the second positioning point to the same height, and then reduce the height error by performing iterative approximation between the two points of the third positioning point and the second positioning point, thereby quickly bringing the first positioning point, the second positioning point and the third positioning point to an equal height state, thereby making the tooth mold at an accurate angle and direction, facilitating collaboration between the doctor and dental technician, and further improving work efficiency.

[0015] Other objects, advantages and novel features of the present invention will become more apparent from the following detailed description and the associated drawings. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a three-dimensional view of the present invention. [Figure 2] FIG. 2 is an exploded view of the surveyor of the present invention. [Figure 3] FIG. 3 is an exploded view of the surveyor table of the present invention. [Figure 4] FIG. 4 is a cross-sectional view of the present invention. [Figure 5]FIG. 5 is a schematic diagram of the present invention with the addition of a surviving needle and clamping dental mold. [Figure 6] FIG. 6 is a schematic diagram showing the surveyor of the present invention surveying a dental impression. [Figure 7] FIG. 7 is a schematic diagram showing how the clamp table angle is adjusted in the present invention. [Figure 8] FIG. 8 is a schematic diagram showing how the height of the clamp table portion is adjusted by the adjusting screw in the present invention. [Figure 9] FIG. 9 is a schematic diagram of adjusting the positioning points and the relative positions of the screws before surveying in the present invention. [Figure 10] FIG. 10 is a top view showing the adjustment of the positioning points and the relative positions of the screws before surveying in the present invention. [Figure 11] FIG. 11 is a schematic diagram of the tooth form and positioning points of the present invention. [Figure 12] FIG. 12 is a schematic diagram showing the positioning points of the present invention in a projection manner. [Figure 13] FIG. 13 is a schematic diagram of the first positioning point of the present invention. [Figure 14] FIG. 14 is a schematic diagram of the second positioning point of the present invention. [Figure 15] FIG. 15 is a schematic diagram showing the first calibration of the present invention in the projection method. [Figure 16] FIG. 16 is a schematic diagram of the third positioning point of the present invention when surveying. [Figure 17] FIG. 17 is a schematic view of the projection for adjusting the third adjusting screw in the present invention. [Figure 18] FIG. 18 is a schematic diagram showing the second calibration of the present invention in the projection method. [Figure 19] FIG. 19 is a schematic diagram showing the third calibration of the present invention in the projection method. [Figure 20] FIG. 20 is a schematic diagram showing the adjustment of the first adjusting screw of the present invention. [Figure 21] FIG. 21 is a schematic view of the projection for adjusting the first adjusting screw of the present invention. [Figure 22] FIG. 22 is a schematic diagram showing the fourth calibration of the present invention in the projection method. [Figure 23] FIG. 23 is an enlarged schematic diagram showing the fourth calibration of the present invention in a projection manner. [Figure 24] FIG. 24 is a first schematic diagram of the present invention for actually saving a dental impression. [Figure 25] FIG. 25 is a second schematic diagram of the present invention for actually saving a dental impression. [Figure 26] FIG. 26 is a three-dimensional view of a conventional dental surveyor. DETAILED DESCRIPTION OF THE INVENTION

[0017] For a better understanding and appreciation of the objects, features, and advantages of the present invention, the following detailed description will be given with reference to the drawings in [Brief Description of the Drawings].

[0018] As shown in FIGS. 1 to 6, the present invention provides a dental surveyor (1) including a surveyor (10) and a surveyor table (20).

[0019] A simplified embodiment of a surveyor (10) according to the present invention is as follows: the surveyor (10) comprises a platform (11), a vertical column (12), a first surveying arm (13), a second surveying arm (14), and a vertical surveyor rod (15). The pivot seat (12) is fixed on the platform (11), the first surviving arm (13) is pivoted to the pivot seat (12), and the second surviving arm (14) is pivoted to the first surviving arm (13), thereby allowing the pivot seat (12), the first surviving arm (13), and the second surviving arm (14) to pivot relative to each other, and the second surviving arm (14) is provided with the surveyor rod (15), and the surveyor rod (15) is provided with a surveying needle (151) (analyzing rod) for surveying the dental mold (30) (cast).

[0020] The complete embodiment of the surveyor (10) according to the present invention is as follows: the surveyor (10) comprises a platform (11), an axle seat (12), a first surveying arm (13), a second surveying arm (14), and a surveyor rod (15), the axle seat (12) is fixed on the platform (11), a pivot axle (121) is provided at the top of the axle seat (12), an axle hole (131) and a first pivot hole (132) are passed through the first surveying arm (13), and a first mounting hole (1311) and a second mounting hole (1321) are provided on the sides of the axle hole (131) and the first pivot hole (132), respectively. The pivot shaft (121) of the pivot seat (12) is provided in the shaft hole (131), the second hinge hole (141) and the surveyor rod hole (142) are provided through the second surveying arm (14), a third insertion hole (1411) and three fourth insertion holes (1421) are provided on the sides of the second pivot hole (141) and the surveyor rod hole (142), respectively, a surveyor rod bush (143) is provided in the surveyor rod hole (142), and a plurality of ball point set screws (101) are provided in the plurality of fourth insertion holes (1421). When the screw is fixed, the surveyor rod bushing (143) is assembled into the fourth mounting hole (1421), a surveyor rod (15) is installed in the surveyor rod bushing (143), a surveying needle (151) for surveying the tooth form (30) may be installed in the surveyor rod (15), and a top stop portion (152) (stop ring) is fixed to the top of the surveyor rod (15), and the top stop portion (152) abuts against the surveyor rod bushing (143), thereby limiting the range of movement of the surveyor rod (15).The ball spring screws (101) are fixed in the upper and lower fourth mounting holes (1421), and the ball spring screws (101) apply an average pressure to the surveyor rod (15), thereby eliminating the tolerance in the surveyor rod bushing (143) of the surveyor rod (15) and improving the lifting precision. The surveyor rod fixing screw (102) is fixed in the middle fourth mounting hole (1421) so as to abut on the surveyor rod (15), and the position of the surveyor rod (15) can be adjusted and fixed by tightening or loosening the surveyor rod fixing screw (102). The first pivot hole 132 and the second pivot hole 141 are provided with slide bushings 103, and a pivot shaft 104 is passed through the two slide bushings 103. A position set screw 109 is fixed in the second mounting hole 1321 so as to abut against the pivot shaft 104. By fixing the pivot shaft 104, the pivot seat 12, the first surviving arm 13, and the second surviving arm 14 can pivot relative to each other. The first surviving arm 13 is fixed to the first mounting hole 1311 and the pivot shaft 121 by a position set screw arm 105 (clamping lever), thereby adjusting and fixing the angle between the pivot seat 12 and the first surviving arm 13. The second surviving arm (14) is fixed to the third mounting hole (1411) by the position set screw arm (105) and abuts on the pivot shaft (104), thereby adjusting and fixing the angle between the first surviving arm (13) and the second surviving arm (14). Screw covers (106) are provided on the tops of the pivot shaft (121) and the pivot shaft (104) to limit their top positions. The first surviving arm (13) and the second surviving arm (14) are provided with multiple washers (107) and multiple thrust bearings (108) to enhance smooth pivoting.The washer (107) is for protecting the bearing portion (108) thereunder, and the pivot seat (12), the first surviving arm (13), and the second surviving arm (14) achieve a linked relationship in which they pivot with each other.

[0021] The surveyor table 20 includes a cast clamping table 21 and an adjustment platform 22. The surveyor table 20 is placed on the platform 11. The clamping table 21 is used to clamp the dental mold 30 and is provided with a cast holding knob 211 for adjusting the clamping force. A swivel ball 212 is provided at the bottom of the clamping table 21, and a fine adjustment device 221 is provided in the center of the adjustment platform 22. A tilting adjustment knob 222 is fixed to the fine adjustment device 221, and the fine adjustment device 221 is clamped by the fine adjustment device 221. Rotating the fine adjustment knob 222 loosens the fine adjustment device 221, allowing the fine adjustment device 221 to be adjusted. This changes the angle and direction of the clamp table 21. A top housing 23 (swivel ball housing) that limits the position of the rotating part 212 is provided on the top of the adjustment platform 22. A first base adjustment screw O, a second base adjustment screw P, and a third base adjustment screw Q are fixed to the adjustment platform 22. By moving the first base adjustment screw O, the second base adjustment screw P, or the third base adjustment screw Q forward or backward, the height of the iso-level point, first positioning point, or third positioning point of the tooth mold on the clamp table 21 corresponding to the first base adjustment screw O, the second base adjustment screw P, or the third base adjustment screw Q changes, thereby achieving the effect of three-point positioning adjustment.

[0022] In the dental surveyor (1) provided by the present invention, the surveyor rod bush (143) is made of copper, and the surveyor rod bush (143) is made of a copper pillar with a hole drilled in the center.

[0023] In the dental surveyor (1) provided by the present invention, the bearing portion (108) is a thrust bearing, and has higher parallelism and precision when pivoting.

[0024] As shown in FIG. 2, in the dental surveyor (1) provided by the present invention, the axial seat (12) is locked to the platform (11) from bottom to top with a plurality of fixing parts (111).

[0025] As shown in FIG. 3, in the dental surveyor (1) provided by the present invention, the first adjusting screw (O), the second adjusting screw (P), and the third adjusting screw (Q) are evenly arranged around the adjusting platform (22).

[0026] As shown in FIG. 7, the present invention provides a surveying method for accurately determining the insertion and removal path of a dental cast on a dental surveyor using a dental surveyor (1). The dentist adjusts the angle and direction of the dental cast (30) using the fine adjustment knob (222) to initially determine the front-to-back and left-to-right inclination of the dental cast. As shown in FIG. 10, the front-to-back and left-to-right directions of the dental cast are adjusted to the positions of the first, second, and third adjusting screws, respectively. As shown in FIG. 8, adjusting one of the first, second, and third adjusting screws (O), (P), and (Q) does not affect the other two, so the front-to-back and left-to-right inclination of the dental cast (30) can be accurately adjusted and determined using the first, second, and third adjusting screws. Therefore, it can be confirmed that the front-to-back and left-to-right directions of the dental cast can be accurately adjusted by adjusting the first, second, or third adjusting screws. As shown in Figures 24 and 25, by surveying the teeth of the dental cast 30 with the surveying needle 151, the insertion and removal path of the dental cast 30 can be accurately adjusted and determined as a reference for the insertion angle when manufacturing the denture, and the denture manufactured at a desired angle can be fitted. Therefore, this is a surveying method for accurately determining the insertion and removal path of a dental cast (determining the path of insertion of a cast on a dental surveyor).

[0027] As shown in Figures 7 to 11, the present invention provides a surveying method for recording and reproducing the path of insertion and removal of a dental cast on a dental surveyor using a dental surveyor (1). The surveying method of the present invention is performed by the following steps: (1) In the step of recording the insertion and removal path of the dental cast (30), the dentist surveys the dental cast (30) on the dental surveyor, and then determines the direction and inclination of the dental cast, i.e., the insertion and removal path, and performs a three-point contour positioning (Tripoding). Using the method, three separate contour points are selected on the surface of the dental mold (30) to form a first positioning point (A), a second positioning point (B), and a third positioning point (C). The dentist then hands the dental mold (30) over to a dental technician, who then recreates the insertion and removal path of the dental mold and fabricates the denture; (2) In the step of recreating the insertion and removal path of the dental mold, before the dental technician fabricates the denture, the dental technician must recreate the insertion and removal path of the dental mold (30) determined by the dentist on a dental surveyor. The dental technician adjusts the position and angle of the dental mold (30) on the dental surveyor (1) to adjust the first positioning point (A), the second positioning point (B), and the third positioning point (C) to the same height, thereby recreating the insertion and removal path of the dental mold (30).

[0028] As shown in FIG. 11, the present invention provides a method for reproducing the path of insertion of a cast on a dental surveyor using a dental surveyor (1). The repositioning method of the present invention is performed by the following steps: First, second, and third positioning points (A, B, and C) are determined by selecting contour points on the surface of the dental cast (30). The first, second, and third positioning points (A, B, and C) form a triangle. As shown in FIG. 7, the fine adjustment knob (222) is rotated. Rotating the fine adjustment knob (222) loosens the fine adjustment part (221), and the angle and direction of the clamp table (21) can be changed by adjusting the rotating part (212). As shown in Figures 9 and 10, by adjusting the angle and direction of the tooth form (30), the first positioning point (A), the second positioning point (B), and the third positioning point (C) are brought closer to the first adjusting screw (O), the second adjusting screw (P), and the third adjusting screw (Q), respectively, and the heights of the first positioning point (A), the second positioning point (B), and the third positioning point (C) are made as close as possible to each other, thereby completing the initial calibration. Next, as shown in Figures 13 and 14, first, using the second adjusting screw (P) as a reference, the height of the second positioning point (B) is measured using the tip of the surveying needle (151), and the height of the first positioning point (A) is adjusted by adjusting the first adjusting screw (O), so that the first positioning point (A) and the second positioning point (B) are at the same height, and the height is confirmed with the surveying needle (151). As shown in FIG. 16, by adjusting the third adjusting screw (Q) again, the height of the third positioning point (C) is adjusted, so that the first positioning point (A) and the third positioning point (C) are at the same height.Then, as shown in Figure 13, the height of the first positioning point (A) is adjusted by adjusting the first adjusting screw (O), so that the first positioning point (A) and the second positioning point (B) are at the same height. After repeated adjustments, the first positioning point (A), the second positioning point (B), and the third positioning point (C) are at the same height, so that the dental mold (30) is at the correct angle and direction. This facilitates collaboration between the doctor and dental technician, further improving work efficiency and the accuracy of denture production.

[0029] The principle of the dental surveyor surveying method of the present invention is detailed as follows: By adjusting the angle and direction of the dental impression (30) with the fine adjustment knob (222) and initially determining the front-to-back and left-to-right inclination of the dental impression, the first positioning point (A), the second positioning point (B), and the third positioning point (C) are brought closer to the first adjusting screw (O), the second adjusting screw (P), and the third adjusting screw (Q), respectively. Therefore, by adjusting the first adjusting screw (O), the second adjusting screw (P), or the third adjusting screw (Q), it can be determined that the height change of one point is higher than that of the other two points when adjusting the first positioning point (A), the second positioning point (B), or the third positioning point (C).

[0030] 7 to 10, this is a method for reproducing the path of insertion of a cast on a dental surveyor. In step 1, the angle and position of the dental cast (30) are adjusted with the fine adjustment knob (222) to bring the first positioning point (A), the second positioning point (B), and the third positioning point (C) on the dental cast closer to the first adjusting screw (O), the second adjusting screw (P), and the third adjusting screw (Q), respectively, and bring the first positioning point (A), the second positioning point (B), and the third positioning point (C) closer to the same height.

[0031] As shown in Figure 12, using the principles of projective geometry, the points obtained by projecting the first adjusting screw (O), the second adjusting screw (P), and the third adjusting screw (Q) onto the H plane, the V plane, and the L plane will be abbreviated as points O, P, and Q, and the lines connecting two of the three will be abbreviated as lines OP, PQ, and OQ.

[0032] In addition, the points projected onto the H plane, V plane, and L plane of the first positioning point (A), second positioning point (B), and third positioning point (C) will be abbreviated as points A, B, and C below to make them easier to read and understand.

[0033] As shown in Figure 12, using the principles of projective geometry, it is assumed that point O is the tangent point between the first adjusting screw (O) and the platform (11), point P is the tangent point between the second adjusting screw (P) and the platform (11), and point Q is the tangent point between the third adjusting screw (Q) and the platform (11). In addition, the three-dimensional coordinate system has H, V, and L planes, where H plane is an imaginary plane of the platform (11), and the three points O, P, and Q must be on the H plane. The V plane is a plane through which the OP line passes and is perpendicular to the OP line, and the L plane is a plane through which the PQ line passes and is perpendicular to the PQ line. The V plane and L plane are each perpendicular to the H plane, but the V plane and L plane are not necessarily perpendicular to each other.

[0034] As shown in Figures 13 and 14, this is a method for reproducing the path of insertion of a cast on a dental surveyor. In step 2, the height of the first positioning point (A) is adjusted with the first adjusting screw (O) and the height of the second positioning point (B) is adjusted with the second adjusting screw (P) to make the first positioning point (A) and the second positioning point (B) the same height.

[0035] As shown in Figure 15, using the principles of projective geometry, this is the projection of points A, B, and C onto the V plane. Points A and B are at the same height, point C is lower, the difference in height between the three points is hc, and the OP lines overlap to form one point.

[0036] As shown in Figure 16, in step 3, the height of the third positioning point (C) is adjusted with the third adjustment screw (Q) to make the first positioning point (A) and the third positioning point (C) at the same height, and at this time, the three points A, B, and C rotate around the OP line as an axis, as shown in Figure 17.

[0037] As shown in Figure 18, using the principles of projective geometry, in the projection of points A, B, and C onto the V plane, points A, B, and C rotate around OP as the axis until they are at the same height, changing the relationship in step 2 where points A and B were at the same height. The difference in height between the three points is hb, and the mathematical relationship is hc:hb=AC:AB. Since hc is much larger than hb, it can be seen that the difference in height between the three points has become smaller.

[0038] As shown in Figure 19, using the principles of projective geometry, in the projection of points A, B, and C onto plane L, points A and C are at the same height, point B is higher, the difference in height between the three points is hb, and lines P and Q overlap to form one point.

[0039] As shown in Figure 20, in step 4, the height of the first positioning point (A) is adjusted with the first adjustment screw (O) so that the first positioning point (A) and the second positioning point (B) are at the same height, and at this time, the three points A, B, and C rotate around the PQ line as an axis, as shown in Figure 21.

[0040] As shown in Figure 22, using the principles of projective geometry, in the projection of points A, B, and C onto plane L, points A and B are at the same height, point C is lower, the difference in height between the three points is hc", and lines P and Q overlap to form one point.

[0041] From the above principle, we can see that the difference in height between the three points decreases from hc to hb, then further to hc", and gradually decreases until the three points become the same height, so that they are almost indistinguishable.

[0042] Therefore, by repeatedly adjusting the height of the adjusting screws, the difference in height among the three positioning points becomes smaller and smaller until the first positioning point (A), the second positioning point (B), and the third positioning point (C) are at the same height, allowing the user to adjust the dental impression (30) to the correct angle and direction, thereby completing the repositioning of the dental impression on the surveyor (reproducing the path of insertion of a cast on a dental surveyor).

[0043] As shown in Figures 24 and 25, by staking the tooth portion of the dental mold (30) with the staking needle (151), the denture can be fitted at a desired angle by using the staking needle (151) as a reference for the fitting angle when making the denture.

[0044] From the above, the dental surveyor and the surveying method of the present invention have the following advantages: (1) The insertion and removal path of the dental mold (30) is accurately adjusted and determined. When adjusting any one of the first adjusting screw (O), the second adjusting screw (P), or the third adjusting screw (Q), the adjustment does not affect the other two at the same time, so the forward / backward and left / right inclination of the tooth form (30) can be accurately adjusted and determined; (2) The adjusting platform (22) can adjust the angle and direction of the tooth form (30), so that the first positioning point (A), the second positioning point (B), and the third positioning point (C) can be initially brought close to the first adjusting screw (O), the second adjusting screw (P), and the third adjusting screw (Q), respectively, and the heights of the first positioning point (A), the second positioning point (B), and the third positioning point (C) can be made as equal as possible, so that initial calibration can be completed quickly; (3) The local height of the tooth form (30) can be adjusted by the first adjusting screw (O), the second adjusting screw (P), and the third adjusting screw (Q), so that three-point equal height positioning can be quickly, intuitively, simply, and accurately performed. (4) The use of thrust bearings eliminates the parallelism error between the first surveying arm (13) and the second surveying arm (14) and between the first surveying arm (13) and the pivot seat (12) due to the tolerance of the shaft holes, and the use of ball spring screws (101) eliminates the perpendicularity error between the surveyor rod (15) and the surveyor rod bush (143) due to the tolerance of the shaft holes, thereby ensuring the alignment of the pivot seat (12), the first surveying arm (13), and the second surveying arm (14). and the surveyor rod (15) are pivotable relative to each other and can maintain extremely high parallelism and perpendicularity; (5) The pivot seat (12), the first surveying arm (13), and the second surveying arm (14) are pivotable relative to each other, and together with the surveying needle (151), the heights of the first positioning point (A), the second positioning point (B), and the third positioning point (C) can be quickly measured to perform the surveying method, thereby improving efficiency;(6) In the surveying method of the present invention, after adjusting the first positioning point (A) and the second positioning point (B) to the same height, iterative approximation can be performed between the two points of the third positioning point (C) and the second positioning point (B) to reduce the height error. Therefore, by quickly adjusting the first positioning point (A), the second positioning point (B), and the third positioning point (C) to the same height, the dental mold (30) can be accurately angled and oriented, facilitating the collaboration between the doctor and the dental technician and further improving work efficiency.

[0045] The above is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all changes and modifications made within the scope of the claims of the present invention are also within the scope of the present invention. [Explanation of symbols]

[0046] Prior art: Traditional Dental Surveyor-(90) Surveyor's Table-----(91) Ball joint----(92) The present invention: Dental Surveyor---(1) Surveyor-----(10) Ball spring screw (101) Surveyor rod fixing screw (102) Slide bush----(103) Pivot shaft-----(104) Positioning screw arm----(105) Screw cover-----(106) Washer------(107) Bearing part----(108) Positioning screw----(109) Platform (11) Fixing parts-----(111) Axial seat -----(12) Pivot shaft-----(121) 1st Surviving Arm (13) Shaft hole------(131) First mounting hole ---(1311) First pivot hole ---(132) Second mounting hole---(1321) Second Surviving Arm (14) Second pivot hole ---(141) Third mounting hole---(1411) Surveyor rod hole----(142) 4th mounting hole---(1421) Surveyor Rod Bush---(143) Surveyor Rod-----(15) Surviving Needle-----(151) Top stopper-----(152) Surveyor's Table (20) Clamp table-----(21) Clamp adjustment part---(211) Rotating part-----(212) Adjustment Platform(22) Fine adjustment parts-----(221) Fine adjustment knob----(222) Top housing------(23) Tooth shape------(30) First positioning point ---(A) Second positioning point---(B) Third positioning point---(C) First adjusting screw--(O) Second adjusting screw--(P) Third adjusting screw--(Q)

Claims

1. A dental surveyor including a surveyor and a surveyor table, wherein the surveyor includes a platform, a central seat, a first surveying arm, a second surveying arm, and a surveyor rod, the central seat is fixed on the platform, the first surveying arm is pivoted to the central seat, and the second surveying arm is pivoted to the first surveying arm, so that the central seat, the first surveying arm, and the second surveying arm pivot relative to each other, the second surveying arm is provided with the surveyor rod, and the surveyor rod is provided with a surveying needle for surveying a dental impression, the fine-adjustment knob is fixed to the fine-adjustment component, the rotating part is clamped on the fine-adjustment component, and the fine-adjustment knob can be turned to loosen the fine-adjustment component, thereby adjusting the rotating part to change the angle and direction of the clamp table; a top housing is provided on the top of the adjusting platform to limit the position of the rotating part; first, second, and third adjusting screws are fixed on the adjusting platform; and the height of the clamp table corresponding to the first, second, or third adjusting screw changes by advancing and retreating the first, second, or third adjusting screw, thereby achieving the effect of three-point positioning adjustment.

2. The pivot seat is fixed on the platform, a pivot shaft is provided at the top of the pivot seat, a shaft hole and a first pivot hole are passed through the first surveying arm, a first mounting hole and a second mounting hole are opened on the side surfaces of the shaft hole and the first pivot hole, respectively, the pivot shaft of the pivot seat is provided in the shaft hole, a second pivot hole and a surveyor rod hole are passed through the second surveying arm, a third mounting hole and three fourth mounting holes are opened on the side surfaces of the second pivot hole and the surveyor rod hole, respectively, A surveyor rod bushing is provided in the rod hole, and a plurality of ball spring screws are fixed to the plurality of fourth mounting holes to incorporate the surveyor rod bushing into the fourth mounting holes, a surveyor rod is provided in the surveyor rod bushing, a surveying needle for surveying tooth profiles is provided on the surveyor rod, and a top stopper is fixed to the top of the surveyor rod, and the top stopper abuts against the surveyor rod bushing to limit the range of movement of the surveyor rod, and the upper and lower fourth mounting holes The ball spring screw is fixed to the fourth mounting hole, and the ball spring screw applies an average pressure to the surveyor rod, thereby eliminating tolerances in the surveyor rod bushing and improving accuracy. A surveyor rod fixing screw is fixed to the fourth mounting hole in the middle so as to abut against the surveyor rod. By tightening or loosening the surveyor rod fixing screw, the position of the surveyor rod can be adjusted and fixed. A slide bushing is provided in each of the first pivot hole and the second pivot hole. a pivot shaft is passed through the slide bush, and a position set screw is fixed to abut against the pivot shaft to fix the pivot shaft in the second mounting hole, thereby allowing the pivot seat, the first surviving arm, and the second surviving arm to pivot relatively; the first surviving arm is fixed to the first mounting hole and the pivot shaft by a position set screw arm, thereby adjusting and fixing the angle between the pivot seat and the first surviving arm; and the second surviving arm is fixed to the third mounting hole by the position set screw arm;The dental surveyor according to claim 1, wherein the pivot seat, the first studying arm, and the second studying arm are connected to each other by abutting against the pivot shaft to adjust and fix the angle between the first studying arm and the second studying arm, the pivot shaft and the top of the pivot shaft are provided with screw covers to limit the top position, the first studying arm and the second studying arm are provided with a plurality of washers, and a plurality of bearing parts are provided to enhance the smoothness of the pivot, thereby achieving a linked relationship in which the axis seat, the first studying arm, and the second studying arm pivot with each other.

3. 3. The dental surveyor of claim 2, wherein said surveyor rod bushing is made of copper, said surveyor rod bushing being made of a copper post with a centrally drilled hole.

4. 3. The dental surveyor of claim 2, wherein the bearing portion is a thrust bearing.

5. 3. The dental surveyor of claim 2, wherein said pivot seat is locked to said platform from bottom to top with a plurality of fixing parts.

6. 3. The dental surveyor of claim 2, wherein the first, second, and third adjustment screws are evenly spaced about the adjustment platform.

7. A surveying method for accurately determining the insertion and removal paths of a dental impression on a surveyor using a dental surveyor as described in any one of claims 1 to 6, wherein the surveying method is performed in the following steps: the dentist adjusts the angle and direction of the dental impression with the fine adjustment knob to initially determine the forward-backward and left-right inclination of the dental impression, and by adjusting the first, second, or third adjustment screws so that the forward-backward and left-right directions of the dental impression approach the positions of the first, second, and third adjustment screws, the dentist can adjust the forward-backward and left-right inclination of the dental impression.

8. A surveying method for recording and reproducing insertion and removal paths of dental impressions on a surveyor using the dental surveyor according to any one of claims 1 to 6, the surveying method being carried out by the following steps: In the step of recording the insertion and removal path of the dental mold, the dentist surveys the dental mold on a dental surveyor, determines the direction and inclination of the dental mold, i.e., the insertion and removal path, and selects three separate contour points on the surface of the dental mold using a three-point contour positioning method, thereby forming a first positioning point, a second positioning point, and a third positioning point. The dentist then hands the dental mold over to a dental technician, who then reproduces the insertion and removal path of the dental mold and produces the denture; In the step of reproducing the insertion and removal paths of the dental impression, the dental technician needs to reproduce the insertion and removal paths of the dental impression determined by the dentist on a dental surveyor before making the denture, and the dental technician reproduces the insertion and removal paths of the dental impression by adjusting the position and angle of the dental impression on the dental surveyor to adjust the first positioning point, the second positioning point, and the third positioning point to the same height.

9. A method for repositioning an insertion and removal path of a dental impression on a surveyor using a dental surveyor according to any one of claims 1 to 6, the repositioning method being carried out by the following steps: By selecting the contour points on the surface of the tooth profile, there are a first positioning point, a second positioning point, and a third positioning point, and the first positioning point, the second positioning point, and the third positioning point form a triangle, and the fine adjustment knob can be rotated to loosen the fine adjustment part, so that the angle and direction of the clamp table can be changed by adjusting the rotating part, and the angle and direction of the tooth profile can be adjusted so that the first positioning point, the second positioning point, and the third positioning point approach the first adjustment screw, the second adjustment screw, and the third adjustment screw respectively, and at the same time, the heights of the first positioning point, the second positioning point, and the third positioning point are made as consistent as possible to complete the initial calibration, and then the second adjustment screw is used as a reference to first adjust the tip of the surveying needle. a repositioning method in which the end is used to measure the height of the second positioning point, and the height of the first positioning point is adjusted by adjusting the first adjusting screw so that the first positioning point and the second positioning point are at the same height; the height is checked with the surveying needle, and the height of the third positioning point is adjusted by adjusting the third adjusting screw again so that the first positioning point and the third positioning point are at the same height; and then the height of the first positioning point is adjusted by adjusting the first adjusting screw so that the first positioning point and the second positioning point are at the same height after repeated adjustments, so that the first positioning point, the second positioning point and the third positioning point are at the same height, thereby ensuring that the tooth form is at the correct angle and direction.

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