Oral cavity distraction device for mandibular condylar process operation

Abstract

The invention discloses an oral cavity dilator for mandibular condylar process surgery, relates to the technical field of oral cavity dilator instruments, and provides the following scheme that the oral cavity dilator comprises a direction adjusting mechanism, and 3-5 oral cavity dilator mechanisms are movably arranged in the direction adjusting mechanism; the bottom surface of the direction adjusting mechanism is fixedly connected with a height positioning mechanism; the direction adjusting mechanism comprises an arc-shaped frame. According to the technical scheme, the three to five oral cavity dilator mechanisms are movably connected to the arc-shaped frame, the multiple oral cavity dilator mechanisms are arranged in an arc linear array mode, and therefore multi-directional and multi-direction supporting can be achieved when the oral cavity is dilated; the silica gel lining plates with the anti-skid grooves are arranged on the outer sides of the expansion arms, so that the teeth are in contact with the silica gel lining plates, and damage to the teeth is reduced; in addition, a height positioning mechanism is arranged below the arc-shaped frame, so that the depth of the dilator extending into the oral cavity can be adjusted in the oral cavity dilation stage.

Description

Technical Field

[0001] The invention relates to the technical field of oral cavity spreader instruments, and in particular to an oral cavity spreader used for mandibular condyle surgery. Background Art

[0002] The mandibular condyle participates in the formation of the temporomandibular joint and is one of the weak parts of the mandibular structure. After being hit by direct or indirect external force, condylar fractures may occur. Among them, the posterior and superior end of the mandible is the condyle, and the upper end of the condyle is enlarged into the condylar head. The condylar head and the mandibular fossa of the temporal bone form the temporomandibular joint. The connection between the condylar head and the mandibular ramus is the condylar neck. The front and superior part of the condylar neck is the pterygoid fossa, where most of the fibers of the lateral pterygoid muscle are attached. The temporomandibular joint is composed of the fossa and articular tubercle of the temporal bone and the condyle of the mandible. The periphery of the joint is surrounded by joint capsules and ligaments, and there is a fibrocartilage articular disc between the joint surfaces. The main function of this joint is to participate in chewing, speech, swallowing and other functions.

[0003] When performing mandibular condylar surgery, since this surgical part is involved in chewing, speaking, swallowing and other functions, the patient's mouth needs to be expanded during the operation so that the nerves and muscle tissues around the mandible can be pulled to a suitable surgical position. The oral retractors commonly used during surgery are mostly T-shaped or clamp-type. Both of these have a single direction of oral expansion, a limited expansion range, and a problem of causing discomfort due to fewer stress points in the mouth. At the same time, the posture of the retractor cannot be effectively fixed after expansion. Therefore, those skilled in the art hereby propose an oral retractor solution for mandibular condylar surgery. Summary of the invention

[0004] In view of the above background technology, it is proposed that the oral expander is used in mandibular condyle surgery, but there are defects such as limited oral expansion range and insufficient support. Therefore, a technical solution of an oral expander for mandibular condyle surgery is provided; the oral expander comprises an orientation adjustment mechanism, wherein 3-5 oral expander mechanisms are movably arranged inside the orientation adjustment mechanism, and a height positioning mechanism is fixedly connected to the bottom surface of the orientation adjustment mechanism;

[0005] The orientation adjustment mechanism includes an arc frame, 3-5 screw tubes located inside the arc frame, and 3-5 screw rods screwed inside the screw tubes and located above the arc frame, and a fixing block is fixed on both ends of the arc frame; specifically, after the distance between the arc base and the arc frame is appropriate and sufficient to allow the oral dilator mechanism to be inserted into the patient's mouth, the screw rod is moved upward from the inside of the screw tube by screwing the handle on the screw rod, at which time the close contact relationship between the gasket on the screw rod and the upper end surface of the arc frame is released, and the oral dilator mechanism is pushed along the arc through hole inside the arc frame; wherein, the number of oral dilator mechanisms is determined according to actual conditions, but at least two are required. After driving each oral dilator mechanism to the position in the patient's mouth, the screw rod is rotated in the opposite direction and locked again, forcing the oral dilator mechanism to be fixed at the current position of the arc through hole inside the arc frame.

[0006] The oral dilator mechanism includes a suspension arm, two expansion arms rotatably connected to both sides of the lower surface of the suspension arm, and an adjustment screw rod that passes through the suspension arm from top to bottom, and the bottom end of the adjustment screw rod contacts the upper surface of the expansion arm; specifically, after the bottom tip of the expansion arm is inserted into the patient's mouth, the adjustment screw rod is rotated by the rotary handle to drive the top plate to push the expansion arm downward, forcing the expansion arm to rotate along the axis of the axle pin, and then open to both sides with the midpoint of the suspension arm as the baseline, pulling the patient's mouth to expand, and when the expansion arm expands outward, the patient's teeth contact the medical silicone liner, which can protect the patient's teeth. At the same time, because the multiple groups of oral dilator mechanisms are located at different positions above the mouth, on the basis of increasing the expansion range, it can avoid unidirectional force on the mouth and cause discomfort caused by local force.

[0007] The height positioning mechanism includes an arc-shaped base, and two groups of internally threaded tubes which are arranged in left-right mirror symmetry with the midpoint of the arc-shaped base, and each group of internally threaded tubes is arranged symmetrically up and down, wherein a double-headed screw is rotatably arranged inside each group of internally threaded tubes.

[0008] In the above-mentioned technical solution of an oral expander for mandibular condyle surgery, preferably, the arc frame is overall arc-shaped, and an arc-shaped through hole is arranged inside the arc frame, wherein the bottom surfaces of 3-5 of the spiral tubes are respectively fixedly connected to the front positions of the top surfaces of 3-5 of the suspension arms.

[0009] In the above-mentioned technical solution of an oral retractor for mandibular condylar surgery, preferably, the inner cavity side wall of the screw tube is provided with threads adapted to the outer ring threads of the screw rod, and a screw handle is fixed to the top of the screw rod, and a layer of gasket is fixed to the lower end face of the screw handle for contacting the top end face of the arc frame. Specifically, before performing the mandibular condylar surgery, the arc base is placed on the top of the patient's head in a lying position, so that the arc base surrounds the patient's head, and the double-headed screw is driven to rotate inside the internal threaded tube by rotating the nut, thereby pulling the internal threaded tubes closer to or away from each other, so that the distance between the arc base and the arc frame becomes smaller or larger.

[0010] In the above-mentioned technical solution of an oral expander for mandibular condyle surgery, preferably, the outer ring diameter of the spiral tube is consistent with the inner diameter of the arc-shaped through hole inside the arc-shaped frame, so that the spiral tube can drive the oral expander mechanism to move along an arc in the internal track of the arc-shaped frame.

[0011] In the above-mentioned technical solution of an oral expander for mandibular condyle surgery, preferably, two convex rings are fixed on the front and rear sides of the bottom surface of the suspension arm, the top of the expansion arm is fixedly connected with a convex block inserted between the convex rings, and an axle pin passes through the convex ring and the convex block.

[0012] In the above-mentioned technical solution of an oral expander for mandibular condyle surgery, preferably, the expansion arms are symmetrically arranged front and back with the midpoint of the suspension arm as the base point, and the expansion arms are in the shape of a "7" as a whole, and the top end faces of the expansion arms are provided with notches.

[0013] In the above-mentioned technical solution of an oral expander for mandibular condyle surgery, preferably, a threaded hole for the adjustment screw to pass through and rotate is opened at the inner central position of the suspension arm, a top plate is fixed to one end of the adjustment screw located at the bottom of the threaded hole, the bottom surface of the top plate is in contact with the notch end face of the top surface of the expansion arm, and a rotary handle is fixed to one end of the adjustment screw located at the top of the threaded hole.

[0014] In the above-mentioned technical solution of an oral expander for mandibular condyle surgery, preferably, grooves are provided at the bottom of the surface of the side away from each other of the expansion arms, a medical silicone lining is fixedly connected to the inside of the groove by an adhesive, and 7-10 anti-slip grooves are provided on the outer surface of the medical silicone lining.

[0015] In the above-mentioned technical solution of an oral expander for mandibular condyle surgery, preferably, the ends of the internal threaded tube that are away from each other are fixedly connected to the top surface of the arc base and the bottom surface of the fixed block respectively; wherein a nut is fixed to the middle section of the outer ring of the double-headed screw, and the inner cavity side walls of the internal threaded tube are provided with threaded grooves that are adapted to the outer ring threads of the double-headed screw.

[0016] It can be seen from the above technical solution that the present invention provides an oral retractor for mandibular condyle surgery. Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the technical solution of the present invention, 3-5 oral expander mechanisms are movably connected on an arc frame, so that multiple oral expander mechanisms are arranged in a linear array along the arc, so that multi-directional and multi-directional support can be provided when expanding the oral cavity; and a silicone lining with anti-slip grooves is provided on the outer side of the expansion arm, so that the teeth can contact with it to reduce damage to the teeth; in addition, a height positioning mechanism is provided under the arc frame to achieve the ability to adjust the depth of the expander extending into the oral cavity during the oral expansion stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces and describes the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the multi-directional oral retractor;

[0020] Figure 2 It is a schematic diagram of the oral expander mechanism and the orientation adjustment mechanism;

[0021] Figure 3 is a schematic diagram of the azimuth adjustment mechanism;

[0022] Figure 4 is a schematic diagram of a mouth spreader mechanism;

[0023] Figure 5 Schematic diagram of the height positioning mechanism.

[0024] Attached Figure 1 -Attached Figure 5 The corresponding relationship of the parts is as follows:

[0025] 1. Azimuth adjustment mechanism; 11. Arc frame; 12. Screw tube; 13. Screw rod; 14. Fixing block; 2. Oral dilator mechanism; 21. Suspension arm; 22. Convex ring; 23. Bump; 24. Expansion arm; 25. Medical silicone lining; 26. Top plate; 27. Adjustment screw rod; 28. Axis pin; 29. ​​Rotary handle; 3. Height positioning mechanism; 31. Arc base; 32. Internal threaded tube; 33. Nut; 34. Double-headed screw rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In order to more clearly explain and illustrate the technical solution and implementation of the present invention, several preferred specific embodiments for implementing the technical solution of the present invention are introduced below.

[0028] Embodiment: A preferred technical solution of an oral expander for mandibular condyle surgery:

[0029] It comprises an orientation adjustment mechanism 1, wherein 3-5 oral opening device mechanisms 2 are movably arranged inside the orientation adjustment mechanism 1, and a height positioning mechanism 3 is fixedly connected to the bottom surface of the orientation adjustment mechanism 1;

[0030] The azimuth adjustment mechanism 1 includes an arc frame 11, 3-5 screw tubes 12 located inside the arc frame 11, and 3-5 screw rods 13 screwed inside the screw tubes 12 and located above the arc frame 11, and a fixing block 14 is fixed to both left and right ends of the arc frame 11;

[0031] The oral retractor mechanism 2 includes a suspension arm 21, two expansion arms 24 rotatably connected to both sides of the lower surface of the suspension arm 21, and an adjustment screw rod 27 penetrating the suspension arm 21 from top to bottom, and the bottom end of the adjustment screw rod 27 contacts the upper surface of the expansion arm 24;

[0032] The height positioning mechanism 3 includes an arc base 31 and two groups of internal threaded tubes 32 which are arranged in left-right mirror symmetry with the midpoint of the arc base 31, and each group of internal threaded tubes 32 is arranged symmetrically up and down, wherein a double-headed screw 34 is rotatably arranged inside each group of internal threaded tubes 32.

[0033] The arc frame 11 is in an arc shape as a whole, and an arc through hole is arranged inside the arc frame 11, wherein the bottom surfaces of 3-5 screw tubes 12 are fixedly connected to the front positions of the top surfaces of 3-5 suspension arms 21 respectively. The inner cavity side walls of the screw tubes 12 are provided with threads adapted to the outer thread of the screw rod 13, and a screw handle is fixed at the top of the screw rod 13, and a layer of gasket is fixed on the lower end surface of the screw handle for contacting the top end surface of the arc frame 11. The outer diameter of the screw tube 12 is consistent with the inner diameter of the arc through hole inside the arc frame 11, so that the screw tube 12 can drive the oral retractor mechanism 2 to move along the arc in the internal track of the arc frame 11.

[0034] Two convex rings 22 are fixed on both sides of the bottom surface of the hanging arm 21, and a convex block 23 inserted between the convex rings 22 is fixedly connected to the top of the expansion arm 24, and a shaft pin 28 is inserted between the convex rings 22 and the convex block 23. The expansion arms 24 are symmetrically arranged with the midpoint of the hanging arm 21 as the base point, and the expansion arms 24 are in the shape of a "7" as a whole, and the top end surfaces of the expansion arms 24 are all notched. A threaded hole for the adjustment screw 27 to pass through and rotate is opened at the central position of the inside of the hanging arm 21. A top plate 26 is fixed to one end of the adjustment screw 27 located at the bottom of the threaded hole, and the bottom surface of the top plate 26 contacts the notched end surface of the top surface of the expansion arm 24. A rotary handle 29 is fixed to one end of the adjustment screw 27 located at the top of the threaded hole. A groove is set at the bottom of the side surface of the expansion arm 24 away from each other, and a medical silicone liner 25 is fixedly connected to the inside of the groove by an adhesive, and 7-10 anti-slip grooves are set on the outer surface of the medical silicone liner 25.

[0035] The ends of the internal threaded tube 32 that are away from each other are fixedly connected to the top surface of the arc base 31 and the bottom surface of the fixed block 14 respectively; wherein, a nut 33 is fixed to the middle section of the outer ring of the double-headed screw 34, and the inner cavity side walls of the internal threaded tube 32 are provided with threaded grooves that are compatible with the outer ring threads of the double-headed screw 34.

[0036] According to the above-mentioned preferred technical solution, the workflow of the technical solution is described as follows:

[0037] Before performing mandibular condyle surgery, the arc base 31 is placed on top of the patient's head in a lying position, so that the arc base 31 surrounds the patient's head, and the double-headed screw 34 is driven to rotate inside the internal threaded tube 32 by rotating the nut 33, thereby pulling the internal threaded tubes 32 closer to or away from each other, so that the distance between the arc base 31 and the arc frame 11 becomes smaller or larger.

[0038] After the distance between the arc base 31 and the arc frame 11 is appropriate and sufficient for the oral stretcher mechanism 2 to be inserted into the patient's mouth, the handle on the screw 13 is rotated to allow the screw 13 to move upward from the inside of the screw tube 12. At this time, the close contact between the gasket on the screw 13 and the upper end surface of the arc frame 11 is released, and the oral stretcher mechanism 2 is pushed along the arc through hole inside the arc frame 11; wherein, the number of oral stretcher mechanisms 2 is determined according to actual conditions, but at least two are required. After driving each oral stretcher mechanism 2 to a position in the patient's mouth, the screw 13 is rotated in the opposite direction and locked again, forcing the oral stretcher mechanism 2 to be fixed at the current position of the arc through hole inside the arc frame 11.

[0039] After the bottom tip of the expansion arm 24 is inserted into the patient's mouth, the adjustment screw 27 is rotated by the handle 29 to drive the top plate 26 to push the expansion arm 24 downward, forcing the expansion arm 24 to rotate along the axis of the shaft pin 28, and then opening to both sides with the midpoint of the suspension arm 21 as the baseline, pulling the patient's mouth to expand, and when the expansion arm 24 expands outward, the patient's teeth contact the medical silicone liner 25, which can protect the patient's teeth. At the same time, because the multiple groups of oral expander mechanisms 2 are located at different positions above the oral cavity, on the basis of increasing the expansion range, it can avoid unidirectional force on the oral cavity and cause discomfort caused by local force.

[0040] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention. Finally, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions that can be implemented in this application, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects that can be produced by this application and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in this application.

Claims

1. An oral retractor for mandibular condyle surgery, comprising an orientation adjustment mechanism (1), characterized in that: The position adjustment mechanism (1) is internally provided with 3-5 oral opening device mechanisms (2) in an movable manner, and a height positioning mechanism (3) is fixedly connected to the bottom surface of the position adjustment mechanism (1); The azimuth adjustment mechanism (1) comprises an arc frame (11), 3-5 screw tubes (12) located inside the arc frame (11), and 3-5 screw rods (13) screwed inside the screw tubes (12) and located above the arc frame (11), and a fixing block (14) is fixed to both left and right ends of the arc frame (11); The oral retractor mechanism (2) comprises a suspension arm (21), two expansion arms (24) rotatably connected to both sides of the lower surface of the suspension arm (21), and an adjustment screw rod (27) penetrating the suspension arm (21) from top to bottom, and the bottom end of the adjustment screw rod (27) contacts the upper surface of the expansion arm (24); The height positioning mechanism (3) comprises an arc-shaped base (31), and two groups of internally threaded tubes (32) arranged in left-right mirror symmetry with the midpoint of the arc-shaped base (31), and each group of internally threaded tubes (32) is arranged symmetrically up and down, wherein a double-headed screw rod (34) is rotatably arranged inside each group of internally threaded tubes (32).

2. The oral retractor for mandibular condyle surgery according to claim 1, characterized in that: The arc frame (11) is arc-shaped as a whole, and an arc-shaped through hole is arranged inside the arc frame (11), wherein the bottom surfaces of 3 to 5 of the spiral tubes (12) are fixedly connected to the front positions of the top surfaces of 3 to 5 of the suspension arms (21), respectively.

3. The oral retractor for mandibular condyle surgery according to claim 1, characterized in that: The inner cavity side walls of the spiral tube (12) are provided with threads that match the outer thread of the screw rod (13), and a screw handle is fixed to the top of the screw rod (13). A gasket is fixed to the lower end surface of the screw handle for contacting the top end surface of the arc frame (11).

4. The oral retractor for mandibular condyle surgery according to claim 1, characterized in that: The outer diameter of the spiral tube (12) is consistent with the inner diameter of the arc-shaped through hole inside the arc-shaped frame (11), so that the spiral tube (12) can drive the oral retractor mechanism (2) to move along an arc in the internal track of the arc-shaped frame (11).

5. The oral retractor for mandibular condyle surgery according to claim 1, characterized in that: Two convex rings (22) are fixed on both the front and rear sides of the bottom surface of the suspension arm (21), and the top of the expansion arm (24) is fixedly connected with a convex block (23) inserted between the convex rings (22), and an axle pin (28) passes through between the convex ring (22) and the convex block (23).

6. The oral retractor for mandibular condyle surgery according to claim 1, characterized in that: The expansion arms (24) are all arranged symmetrically front and back with the midpoint of the suspension arm (21) as a base point, and the expansion arms (24) are in the shape of a letter "7" as a whole. The top end surfaces of the expansion arms (24) are all provided with notches.

7. The oral retractor for mandibular condyle surgery according to claim 1, characterized in that: A threaded hole is provided at the central position of the interior of the suspension arm (21) for the adjusting screw rod (27) to pass through and rotate. A top plate (26) is fixed to one end of the adjusting screw rod (27) located at the bottom of the threaded hole. The bottom surface of the top plate (26) contacts the end surface of the notch on the top surface of the expansion arm (24). A rotary handle (29) is fixed to one end of the adjusting screw rod (27) located at the top of the threaded hole.

8. The oral retractor for mandibular condyle surgery according to claim 1, characterized in that: The bottom of the side surface of the expansion arms (24) away from each other is provided with a groove, and a medical silicone liner (25) is fixedly connected to the inside of the groove by an adhesive, and 7-10 anti-slip grooves are provided on the outer surface of the medical silicone liner (25).

9. The oral retractor for mandibular condyle surgery according to claim 1, characterized in that: The ends of the internally threaded tube (32) that are away from each other are fixedly connected to the top surface of the arc-shaped base (31) and the bottom surface of the fixed block (14) respectively; wherein a nut (33) is fixed to the middle section of the outer ring of the double-headed screw rod (34), and the inner cavity side walls of the internally threaded tube (32) are provided with thread grooves that are adapted to the outer ring threads of the double-headed screw rod (34).

Images