Temporomandibular joint operation traction distraction instrument

Abstract

The invention provides a temporomandibular joint operation traction distraction instrument which comprises a drag hook, a distraction device and a fixing device, the fixing device is used for adjusting the dilation degree of the distraction device and keeping the distraction device stable, and the drag hook is movably connected to the distraction device through the fixing device; the drag hook is provided with an adjusting structure used for adjusting the relative position of the drag hook and the fixing device. According to the temporomandibular joint retractor, traction and distraction operation at different angles can be conducted at the same time in a temporomandibular joint operation, the operation view of an operator can be expanded, the workload of an operation assistant is reduced, and the temporomandibular joint retractor has the advantages of saving time and labor and the like.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a traction and distraction device for temporomandibular joint surgery. Background Art

[0002] Open surgery on the temporomandibular joint is very common in the clinical diagnosis and treatment of oral and maxillofacial surgery, and is widely used in the treatment of diseases such as temporomandibular joint disorder, internal ankylosis of the temporomandibular joint, condylar fracture, and tumors in the temporomandibular joint area.

[0003] Due to the delicate anatomical structure of the temporomandibular joint area and the narrow field of view of the surgical open area, multiple assistants are often required to pull from multiple angles at the same time during the operation to expand the surgical field of the temporomandibular joint area. Common surgical retractors in clinical practice can only be pulled from one angle, so assistants are required to continuously pull the retractors at the same time, which has the disadvantages of being time-consuming and labor-intensive. Summary of the invention

[0004] In order to improve the problem that the retractor can only be used for traction from one angle in the existing temporomandibular joint open surgery, which results in time-consuming and labor-intensive operation, the present application provides a temporomandibular joint surgery traction and distraction instrument.

[0005] The present application provides a temporomandibular joint surgery traction and distraction device that adopts the following technical solution: A temporomandibular joint surgical traction and distraction instrument comprises a retractor, a distractor and a fixing device, wherein the fixing device is used to adjust the expansion degree of the distractor and maintain stability, and the retractor is movably connected to the distractor via the fixing device; the retractor is provided with an adjustment structure for adjusting the relative position of the retractor and the fixing device.

[0006] Furthermore, the spreader includes two hinged spreader bodies, the spreader body includes a handle, a bending part and a head, the two heads are arranged back to back, the two bending parts are hinged, and when the two handles are close to each other, the two heads are separated from each other.

[0007] Furthermore, the fixing device comprises: A fixing strip, one end of which is provided with a fixing groove arranged along its length direction and a plurality of tooth grooves arranged at intervals and connected to the fixing groove, one of the heads has a fixing piece slidably matched with both the fixing groove and the tooth groove, and the other head is hinged to the other end of the fixing strip; and The adjusting member is installed at a position between the two ends of the fixing strip.

[0008] Furthermore, the pull hook includes a hook handle, a hook body and a hook head, the adjustment structure includes an adjustment groove opened on the hook body and arranged along its length direction, and the adjustment member is slidably arranged in the adjustment groove and is used to lock the hook body on the fixing strip.

[0009] Furthermore, the adjusting member includes: A fixing stud, threadedly connected to the fixing bar; The rotating head is fixedly connected to the fixing stud, and its outer diameter is larger than the width of the adjusting groove.

[0010] Furthermore, it also includes: An adjusting stud is fixedly connected between the fixing stud and the rotating head, and the outer diameter of the adjusting stud is between the outer diameter of the fixing stud and the outer diameter of the rotating head; The hook body is provided with a plurality of adjustment holes penetrating the adjustment slots, and the adjustment holes are threaded holes and are threadably matched with the adjustment studs.

[0011] Furthermore, the tooth groove is configured as an oblique groove, and its inclination direction is configured away from the adjusting member.

[0012] Furthermore, at least one end of the fixing groove is provided with the fixing groove and the tooth groove.

[0013] Furthermore, the distance between the two heads is greater than the distance between the two free ends of the handles, and the outer sides of the free ends of the heads have a supporting portion.

[0014] Furthermore, one end of the hook handle away from the hook head has an anti-slip protrusion.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. During the open surgery of the temporomandibular joint, after the two heads on the two expansion bodies are respectively held against the articular tuberosities and sigmoid notches of the patient, the expander can be expanded to a specified degree, and then the fixing bar is swung so that the fixing piece thereon slides and fits into one of the tooth grooves to maintain the expansion angle of the two expansion bodies, and then the fixing piece is tightened to lock the fixing bar and the corresponding head, so as to complete the adjustment and stabilization of the expansion degree of the expander; 2. Manually adjust the front and rear position of the retractor, change the position of the adjusting piece in the adjusting slot, so that the hook head of the retractor just hooks the skin tissue in front of the temporomandibular joint incision, and then fix the retractor through the adjusting piece. At this time, the surgical assistant only needs to hold the hook handle of the retractor with one hand and push forward to keep the upper and lower gaps of the temporomandibular joint surgical area open, and pull the skin tissue in front of the joint incision forward to maintain a horizontal field of vision in the surgical area; 3. By using the surgical traction and distraction instrument of the present application, traction and distraction operations at different angles can be performed simultaneously during temporomandibular joint surgery, which can expand the surgeon's surgical field of view, reduce the workload of the surgical assistant, and has the advantages of saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of the surgical traction and distraction instrument in the embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the expander in the embodiment of the present application; Figure 3 This is a schematic diagram of the structure of the fixing device in the embodiment of the present application; Figure 4 This is a schematic diagram of the structure of the draw hook in the embodiment of the present application; Figure 5 This is a schematic diagram of a method for supporting the joint tubercle and the sigmoid notch according to an embodiment of the present application; Figure 6 It is a schematic diagram of the cross-sectional structure of the adjusting member in the embodiment of the present application.

[0018] Reference numerals: 1. hook; 11. hook handle; 111. convex part; 12. hook body; 121. adjustment slot; 122. adjustment hole; 13. hook head; 2. spreader; 21. spreader body; 211. handle; 212. bending portion; 213. head; 214. fixing member; 215. abutting portion; 31, fixing strip; 311, fixing groove; 312, tooth groove; 4. Adjustment piece; 41. Fixing stud; 42. Adjustment stud; 43. Rotating head; 51. Condyle; 52. Gnaphalocele; 53. Articular tubercle; 54. Sigmoid notch. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0020] Reference Figure 1 The embodiment of the present application discloses a temporomandibular joint surgical traction and distraction instrument, which includes a retractor 1, a distractor 2 and a fixing device, wherein the fixing device is used to adjust the expansion degree of the distractor 2 and maintain stability, and the retractor 1 is movably connected to the distractor 2 through the fixing device; the retractor 1 has an adjustment structure for adjusting the relative position of the retractor 1 and the fixing device.

[0021] Specifically, refer to Figure 1 and Figure 2 The spreader 2 includes two hinged spreader bodies 21, the spreader body 21 includes an integrally formed handle 211, a bent portion 212 and a head 213, the two heads 213 are arranged opposite to each other, the two bent portions 212 are hingedly arranged, and when the two handles 211 are close to each other, the two heads 213 are separated from each other. Specifically, the distance between the two heads 213 is greater than the distance between the free ends of the two handles 211, and the free ends of the heads 213 have a supporting portion 215 on the outside.

[0022] Reference Figure 1 and Figure 3 , the fixtures include: The fixing strip 31 has a fixing groove 311 arranged along its length direction and a plurality of tooth grooves 312 arranged at intervals and connected to the fixing groove 311 at one end, wherein one of the heads 213 has a fixing piece 214 that is slidably adapted to both the fixing groove 311 and the tooth groove 312, and the other head 213 is hinged to the other end of the fixing strip 31; specifically, the fixing piece 214 is configured as a bolt threadedly connected to the head 213, and its threaded portion is slidably arranged in the fixing groove 311 or the tooth groove 312, and its cap portion can press the end of the fixing strip 31 onto the corresponding head 213; correspondingly, a bolt that passes through the end of the fixing strip 31 can also be threadedly connected to the head 213 that is hinged to the fixing strip 31, and the bolt can realize the hinge effect of the fixing strip 31 on the head 213, and the rotation damping of the fixing strip 31 on the head 213 can be controlled by controlling the locking degree of the bolt. And The adjusting member 4 is installed between the two ends of the fixing strip 31 .

[0023] And, refer to Figure 1 and Figure 4The retractor 1 includes a hook handle 11, a hook body 12 and a hook head 13. The adjustment structure includes an adjustment groove 121 opened on the hook body 12 and arranged along its length direction. The adjustment member 4 is slidably arranged in the adjustment groove 121 and is used to lock the hook body 12 on the fixing strip 31. The end of the hook handle 11 away from the hook head 13 has an anti-slip protrusion 111 to achieve stability when pulling the retractor 1 during surgery.

[0024] Therefore, during open temporomandibular joint surgery, refer to Figure 1 and Figure 5 First, the skin, subcutaneous fascia, muscle and joint capsule are cut layer by layer, and the surgical incision is pulled back and forth by a conventional surgical retractor 1, and the joint tubercle 53 and the mandibular sigmoid notch 54 are exposed as much as possible.

[0025] Then the assistant holds the two handles 211 of the spreader 2 and respectively abuts the two abutting portions 215 on the two spreader bodies 21 against the patient's articular tuberosities 53 and sigmoid notches 54 ; at this time, the fixing piece 214 on one of the heads 213 slides in the fixing groove 311 on the fixing bar 31 .

[0026] When the expander 2 is expanded to a specified degree, the fixing bar 31 is swung so that the fixing piece 214 thereon slides and fits into one of the tooth grooves 312 to maintain the expansion angle of the two expansion bodies 21, and then the fixing piece 214 is tightened to lock the fixing bar 31 and the corresponding head 213. At this time, the fixing device completes the adjustment and stabilization of the expansion degree of the expander 2.

[0027] Then, the front and rear positions of the retractor 1 are manually adjusted, and the position of the adjusting member 4 in the adjusting slot 121 is changed, so that the hook head 13 of the retractor 1 just hooks the skin tissue in front of the temporomandibular joint incision, and then the retractor 1 is fixed by the adjusting member 4.

[0028] At this time, the surgical assistant only needs to hold the hook handle 11 of the retractor 1 with one hand and push forward to keep the upper and lower gaps of the temporomandibular joint surgical area open and pull the skin tissue in front of the joint incision forward to maintain a horizontal field of vision in the surgical area.

[0029] Moreover, during the operation, the assistant can loosen the fixing piece 214, rotate the fixing bar 31 to slide the fixing piece 214 into the fixing groove 311, and then adjust the two handles 211 of the spreader 2 to embed the fixing piece 214 into other tooth grooves 312 and tighten the fixing piece 214, so as to adjust the vertical expansion range of the temporomandibular joint area.

[0030] At the same time, after releasing the lock of the adjusting member 4 on the retractor 1, the retractor 1 can also be pushed forward and backward to change the position of the adjusting member 4 in the adjusting slot 121 of the hook body 12, thereby adjusting the horizontal forward and backward pulling amplitude of the retractor 1. Alternatively, the adjusting member 4 can be completely removed to replace the retractor 1 of a different model, so as to achieve flexible operation during surgery.

[0031] When the operation is completed and before the joint cavity is sutured, the assistant first removes the adjusting part 4, takes off the retractor 1, then loosens the fixing part 214, releases the fixation of the fixing device on the expander 2, and finally holds the handles 211 of the two expander bodies 21 to move them apart. At this time, the two heads 213 are close to each other, and the two heads 213 can be detached from the patient's articular tubercle 53 and sigmoid notch 54 respectively, and the surgical traction and expansion instrument of the present application can be removed to continue to complete the surgical suturing operation.

[0032] Therefore, by using the surgical traction and distraction instrument of the present application, traction and distraction operations at different angles can be performed simultaneously during temporomandibular joint surgery, which can expand the surgeon's surgical field of view, reduce the workload of the surgical assistant, and has the advantages of saving time and effort.

[0033] In order to improve the stability of the hook 1 during pulling and the convenience of adjustment, refer to Figure 1 and Figure 6 , the adjusting member 4 comprises: A fixing stud 41, threadedly connected to the fixing bar 31; The rotating head 43 has an outer diameter greater than the width of the adjusting slot 121 and is used for the overall rotation of the adjusting member 4; and The adjusting stud 42 is fixedly connected between the fixing stud 41 and the rotating head 43 and the three are arranged coaxially, and the outer diameter of the adjusting stud 42 is between the outer diameter of the fixing stud 41 and the outer diameter of the rotating head 43; The hook body 12 is provided with a plurality of adjustment holes 122 penetrating the adjustment slot 121. The diameter of the adjustment hole 122 is larger than the slot width of the adjustment slot 121 on the hook body 12. The adjustment hole 122 is a threaded hole and is threadably matched with the adjustment stud 42. In addition, a chamfer is provided at one end of the adjustment hole 122 close to the rotating head 43 to facilitate the screwing in of the adjustment stud 42.

[0034] Thus, when the hook 1 is installed on the fixing bar 31, the fixing stud 41 of the adjusting member 4 is first passed through the adjusting groove 121 and then threadedly connected to the fixing bar 31. At this time, when the hook 1 is pulled forward and backward, the fixing stud 41 slides in the adjusting groove 121, which can be used to adjust the position of the hook 1 on the fixing bar 31. When the hook 1 moves to a suitable position and aligns with one of the adjusting holes 122, the rotating head 43 can be rotated so that the adjusting stud 42 is screwed into the adjusting hole 122, and the hook 1 and the fixing bar 31 can be fixed as a whole, ensuring that the position of the hook 1 will not change when the hook 1 is pulled, and ensuring the pulling effect of the hook 1 during the operation; at this time, the fixing stud 41 also rotates with the adjusting stud 42 and continues to thread through the fixing bar 31, which will not interfere with the screw connection between the adjusting stud 42 and the adjusting hole 122.

[0035] It should be clearly stated that the length of the fixing stud 41 is not less than the sum of the thicknesses of the fixing strip 31 and the hook 1 to ensure the stability of the hook 1 when being adjusted on the fixing strip 31; there is no need for special settings for the length of the adjusting stud 42, as long as the adjusting stud 42 can be accurately screwed into the adjusting hole 122 and will not cause thread slippage when the hook 1 is pulled. When making specific settings, the length of the adjusting stud 42 can be selected to be adapted to the thickness of the hook 1 or greater than the thickness of the hook 1.

[0036] In order to increase the stability of the expansion degree of the expander 2 by the fixing device, refer to Figure 3 The tooth groove 312 is set as an oblique groove, and its inclined direction is set away from the adjusting member 4, so that the two spreading bodies 21 will not disintegrate autonomously after being expanded by the fixing device; and the tooth groove 312 is set on the side of the fixing groove 311 away from the handle 211 of the spreader 2, so as to ensure that when the retractor 1 is pulled, the fixing member 214 will not fall out of the tooth groove 312 and slide into the fixing groove 311 regardless of whether it is tightened or not, which can improve the fault tolerance rate of the surgical traction and spreading instrument of the present application when used, and further improve the convenience of use.

[0037] Furthermore, in another feasible embodiment, at least one end of the fixing groove 311 is provided with a fixing groove 311 and a tooth groove 312 .

[0038] The implementation principle of a traction and distraction device for temporomandibular joint surgery in the embodiment of the present application is: During open surgery of the temporomandibular joint, after the two heads 213 on the two distraction bodies 21 are respectively abutted against the patient's articular tuberosities 53 and sigmoid notches 54, the distractor 2 can be expanded to a specified degree, and then the fixing bar 31 is swung so that the fixing piece 214 thereon slides and fits into one of the tooth grooves 312 to maintain the expansion angle of the two distraction bodies 21, and then the fixing piece 214 is tightened to lock the fixing bar 31 and the corresponding head 213 to complete the adjustment and stabilization of the expansion degree of the distractor 2.

[0039] Then, the front and rear positions of the retractor 1 are manually adjusted, and the position of the adjusting member 4 in the adjusting slot 121 is changed, so that the hook head 13 of the retractor 1 just hooks the skin tissue in front of the temporomandibular joint incision, and then the retractor 1 is fixed by the adjusting member 4. At this time, the surgical assistant only needs to hold the hook handle 11 of the retractor 1 with one hand and push forward, so as to keep the upper and lower gaps of the temporomandibular joint surgical area open and pull the skin tissue in front of the joint incision forward to maintain a horizontal field of vision of the surgical area.

[0040] Therefore, by using the surgical traction and distraction instrument of the present application, traction and distraction operations at different angles can be performed simultaneously during temporomandibular joint surgery, which can expand the surgeon's surgical field of view, reduce the workload of the surgical assistant, and has the advantages of saving time and effort.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A temporomandibular joint surgery traction and distraction device, characterized in that: It comprises a retractor, a spreader and a fixing device, wherein the fixing device is used to adjust the expansion degree of the spreader and keep it stable, and the retractor is movably connected to the spreader through the fixing device; the retractor is provided with an adjusting structure for adjusting the relative position of the retractor and the fixing device.

2. The temporomandibular joint surgical distraction and separation instrument according to claim 1, characterized in that: The spreader comprises two hinged spreader bodies, each of which comprises a handle, a bending part and a head. The two heads are arranged back to back, and the two bending parts are hinged. When the two handles are close to each other, the two heads are separated from each other.

3. The temporomandibular joint surgical distraction and separation instrument according to claim 2, characterized in that: The fixing device comprises: A fixing strip, one end of which is provided with a fixing groove arranged along its length direction and a plurality of tooth grooves arranged at intervals and connected to the fixing groove, one of the heads has a fixing piece slidably matched with both the fixing groove and the tooth groove, and the other head is hinged to the other end of the fixing strip; and The adjusting member is installed at a position between the two ends of the fixing strip.

4. The temporomandibular joint surgical distraction and separation instrument according to claim 3, characterized in that: The pull hook comprises a hook handle, a hook body and a hook head, the adjustment structure comprises an adjustment slot opened on the hook body and arranged along its length direction, the adjustment member is slidably arranged in the adjustment slot and is used to lock the hook body on the fixing strip.

5. The temporomandibular joint surgical distraction and separation instrument according to claim 4, characterized in that: The adjusting member comprises: A fixing stud, threadedly connected to the fixing bar; The rotating head is fixedly connected to the fixing stud, and its outer diameter is larger than the width of the adjusting groove.

6. The temporomandibular joint surgical distraction and separation instrument according to claim 5, characterized in that: Also includes: An adjusting stud is fixedly connected between the fixing stud and the rotating head, and the outer diameter of the adjusting stud is between the outer diameter of the fixing stud and the outer diameter of the rotating head; The hook body is provided with a plurality of adjustment holes penetrating the adjustment slots, and the adjustment holes are threaded holes and are threadably matched with the adjustment studs.

7. A temporomandibular joint surgical distraction and separation instrument according to any one of claims 3 to 6, characterized in that: The tooth groove is arranged as an oblique groove, and its inclination direction is arranged away from the adjusting member.

8. The temporomandibular joint surgical distraction and separation instrument according to claim 7, characterized in that: The fixing groove and the tooth groove are provided at least at one end of the fixing groove.

9. The temporomandibular joint surgical distraction and separation instrument according to claim 2, characterized in that: The distance between the two heads is greater than the distance between the two free ends of the handles, and a supporting portion is provided on the outer side of the free end of the head.

10. The temporomandibular joint surgery distraction and traction instrument according to claim 4, characterized in that: One end of the hook handle away from the hook head is provided with an anti-slip convex portion.

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