CN213217415U

CN213217415U - Periosteum stripper for mandibular angle arc osteotomy

Info

Publication number: CN213217415U
Application number: CN202021711376.0U
Authority: CN
Inventors: 孙铁成; 杨斌
Original assignee: Plastic Surgery Hospital of CAMS and PUMC
Current assignee: Plastic Surgery Hospital of CAMS and PUMC
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-05-18
Anticipated expiration: 2030-08-17

Abstract

The utility model relates to the technical field of medical equipment, in particular to a periosteum stripper for a mandibular angle arc osteotomy. The utility model discloses a periosteum elevator of mandibular angle arc osteotomy is including being used for handheld mounting, movable rod and being the sub-head of peeling off of crookedness, the movable rod sets up, its upper end with the lower extreme of mounting rotates to be connected, and can move towards the lower extreme both sides pendulum of mounting changes, be equipped with locking structure on the mounting, locking structure be used for with the movable rod is fixed at the optional position that the movable rod swung and changes with mounting locking, it is downward to peel off the head of sub-head, its upper end with the connection can be dismantled to the lower extreme of movable rod. The advantages are that: structural design is reasonable, can adjust the operating angle who peels off the son head according to actual conditions, and the very big staff that has made things convenient for carries out the operation of various angles, has improved its actual use value.

Description

Periosteum stripper for mandibular angle arc osteotomy

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a periosteum stripper for a mandibular angle arc osteotomy.

Background

Mandibular angle arc osteotomy is through cutting out the too outstanding part of mandibular angle, resume normal mandibular angle form, make the face type become beautiful ellipse or melon seed face, mandibular angle plastic art can effectually do specific selection according to individual facial condition, can be through the oral external approach, the oral treatment methods such as approach and joint approach effectively improve facial profile, make facial radian smooth, really realize melon seed face, when performing the operation, need use periosteum stripper.

However, there are still many disadvantages in actual use, and when a medical worker holds the periosteum elevator to perform a periosteum elevator operation, the periosteum elevator cannot be adjusted according to actual operation conditions due to a certain blocking effect, thereby reducing the practicability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a periosteum elevator of angle of mandible arc osteotomy, the effectual defect of overcoming prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a periosteum stripper for a mandibular angle arc osteotomy comprises a fixing piece, a movable rod and a stripping sub-head in a bending shape, wherein the fixing piece is used for holding by hand, the movable rod is arranged, the upper end of the movable rod is rotatably connected with the lower end of the fixing piece and can swing towards the two sides of the lower end of the fixing piece, the fixing piece is provided with a locking structure, the locking structure is used for locking and fixing the movable rod and the fixing piece at any position of swinging of the movable rod, the head of the stripping sub-head is downward, and the upper end of the stripping sub-head is detachably connected with the lower end of the movable rod.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the lower extreme of above-mentioned mounting is equipped with the rotation connecting block, and the upper end of above-mentioned movable rod is equipped with the installation piece that corresponds with above-mentioned rotation connecting block, and above-mentioned installation piece and above-mentioned rotation connecting block staggered arrangement in the horizontal plane, and run through the round pin axle rotation connection of the two through the level.

Further, the middle part of the lower end of the fixed part is provided with a notch with two sides penetrating through the fixed part, the upper end of the movable rod is provided with a stop plate vertically extending into the notch, the rotating connecting block and the mounting block are respectively provided with two parts and are distributed on two sides below the notch in pairs, the locking structure comprises two groups of elastic telescopic components which are respectively assembled on the side walls at two ends of the notch at the lower end of the fixed part, the upper part of the stop plate is positioned between the two groups of elastic telescopic components, the ends of the two groups of elastic telescopic components which are relatively close to each other are respectively provided with a limiting block, the two ends of the upper part of the stop plate are symmetrically provided with a clamping groove structure matched with the limiting blocks at two ends, the two groups of elastic telescopic components can respectively horizontally contract and relatively keep away from each other under the action of external force, or the limiting blocks are horizontally extended to be, thereby locking and fixing the movable rod and the fixed piece.

Further, the clamping groove structures comprise a plurality of clamping grooves which are in arc-shaped continuous arrangement, the limiting blocks are matched with the clamping grooves, the movable rods can swing to the position, opposite to the limiting blocks, of one of the clamping grooves at the two ends of the abutting plates relative to the fixing piece, and the two groups of elastic telescopic assemblies horizontally extend to stretch into the clamping grooves opposite to the current positions of the elastic telescopic assemblies after external force is removed and are clamped with each other.

Furthermore, the elastic telescopic component also comprises a pull rod, a bracket, a pull rod handle and an elastic piece, the bracket is assembled at the outer side of the corresponding end of the lower end of the fixing piece, the pull rod horizontally penetrates through the side wall of the corresponding end of the notch and the corresponding bracket, the end part of the pull rod extending into the notch is provided with the limiting block, one end of the pull rod penetrating through the bracket is connected with the pull rod handle, the elastic piece is arranged in the bracket, and is connected between the bracket and the pull rod, the pull rod handle is acted by external force to horizontally pull the pull rod outwards, and drives the limit block to separate from the corresponding slot structure, the elastic element compresses, after the external force is cancelled, the elastic element restores the initial state, and the pull rod is driven to return, and the limiting block is clamped with the corresponding clamping groove structure, so that the movable rod and the fixing piece are locked and fixed.

Further, the elastic element is a spring, a limiting plate is fixed on the periphery of one end, extending into the support, of the pull rod, the spring is sleeved outside one section, extending into the support, of the pull rod, and two ends of the spring are respectively connected with the side end outside the support and the limiting plate.

Furthermore, the elastic telescopic assembly comprises a plurality of pull rods, and the end part of one end, extending into the gap, of each corresponding pull rod is provided with the limiting block.

Further, the fixing piece is a rod-shaped member which is vertically arranged, the lower end of the fixing piece is rotatably connected with the upper end of the movable rod, and the upper end of the fixing piece is provided with a horizontal handheld rod.

Further, a nut having an internal thread and an open upper portion is provided at an upper end of the stripper head, a cylindrical connecting portion having an external thread is provided at a lower end of the movable rod, the stripper head is screwed to the cylindrical connecting portion at the lower end of the movable rod through the nut, and a head of the stripper head is formed in an obtuse angle shape or a sharp shape.

The lower end of the movable rod is provided with a cylindrical connecting part with an external thread, the cylindrical connecting part is in threaded connection with a horizontal assembling seat, the number of the stripping sub-heads is two, one head of the stripping sub-heads is in an obtuse angle shape, the other head of the stripping sub-heads is in a sharp shape, the two stripping sub-heads are arranged at the lower end of the assembling seat at intervals, the heads of the two stripping sub-heads are bent towards the side, away from the two stripping sub-heads, and the upper ends of the two stripping sub-heads are connected and fixed with the lower end of the assembling seat.

The utility model has the advantages that: structural design is reasonable, can adjust the operating angle who peels off the son head according to actual conditions, and the very big staff that has made things convenient for carries out the operation of various angles, has improved its actual use value.

Drawings

FIG. 1 is a schematic view of the periosteal elevator for the mandibular angle arch osteotomy of the present invention;

FIG. 2 is a schematic view of the periosteal elevator for the mandibular angle arch osteotomy of the present invention;

FIG. 3 is a schematic structural view of a locking structure in the periosteum elevator of the mandibular angle arch osteotomy of the present invention;

fig. 4 is a structural design diagram of the structure of the retaining groove at the end of the retaining plate of the periosteum elevator for the mandibular angle arc osteotomy of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the fixing piece, 2, the movable rod, 3, the stripping sub-head, 4, the locking structure, 5, the pin shaft, 6, the assembly seat, 11, the handheld rod, 12, the rotation connecting block, 13, the notch, 21, the mounting block, 22, the stop plate, 41, the limiting block, 42, the pull rod, 43, the support, 44, the pull rod handle, 45, the elastic piece, 221, the clamping groove, 421 and the limiting plate.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

The first embodiment is as follows: as shown in fig. 1, the present embodiment provides a periosteum elevator for single-head elevator mandibular angle arc osteotomy, which has the following specific scheme:

the handheld peeling device comprises a fixing piece 1 used for holding by hand, a movable rod 2 and a bent peeling sub head 3, wherein the movable rod 2 is arranged, the upper end of the movable rod 2 is rotatably connected with the lower end of the fixing piece 1 and can swing towards two sides of the lower end of the fixing piece 1, the fixing piece 1 is provided with a locking structure 4, the locking structure 4 is used for locking and fixing the movable rod 1 and the fixing piece 1 at any position of swinging of the movable rod 1, the head of the peeling sub head 3 is downward, and the upper end of the peeling sub head is detachably connected with the lower end of the movable rod 2;

wherein, the upper end of the stripping sub head 3 is provided with a nut with an internal thread and an upper opening, the lower end of the movable rod 2 is provided with a cylindrical connecting part with an external thread, the stripping sub head 3 is connected to the cylindrical connecting part at the lower end of the movable rod 2 through the nut thread, and the head of the stripping sub head 3 is in an obtuse angle shape or a sharp shape.

In the using process, the position of the fixing part 1 is kept unchanged, the movable rod 2 is operated to swing relative to the two sides of the fixing part 1 until the movable rod 2 drives the single stripping sub-head 3 to swing to a relatively proper position, and then the single stripping sub-head 3 is locked and fixed through the locking structure 4, so that the stability between the two is effectively ensured, the whole body can be subjected to angle adjustment according to actual conditions, the operation of various angles by workers is greatly facilitated, the actual use value of the whole body is improved, meanwhile, the bent stripping sub-head 3 is designed to change the conventional linear structure, the bent stripping sub-head 8 is adopted, the stripping sub-head 8 is designed in a bent shape, the end part of the stripping sub-head 8 is designed to be in an obtuse angle shape or a sharp shape, the stripping sub-head is fixed on the mounting base 7 in a rotating mode, the proper type of the stripping sub-head 8 can be selected according to the actual conditions of, the workload of frequently replacing the instruments is reduced, and the operation efficiency is effectively improved.

In the scheme of adopting single son head 8 of peeling off, according to the operation needs select the end head for the son head 8 of peeling off of obtuse angle shape or sharp-pointed shape adaptation and the equipment use of movable rod 2 lower extreme, after using, can swift demolish and peel off son head 8 and disinfect, clear up or maintenance operation can.

Example two: as shown in fig. 2, the present embodiment provides a periosteum elevator for mandibular angle arc osteotomy with two elevator sub-heads, which has the following specific scheme:

wherein, the lower extreme of above-mentioned movable rod 2 is established to be the cylinder connecting portion that has the external screw thread to threaded connection has horizontal assembly seat 6 on the cylinder connecting portion, above-mentioned son head 3 of peeling off is equipped with two, and the head of one of them is for establishing obtuse angle shape, and the head of another is established sharp shape, and two above-mentioned son heads 3 intervals set up in the lower extreme of above-mentioned assembly seat 6, and the head of the two all bends towards the one side that the two was kept away from relatively, and the upper end of two above-mentioned son heads 3 all is connected fixedly with the lower extreme of above-mentioned assembly seat 6.

In the using process, the position of the fixing part 1 is kept unchanged, the movable rod 2 is operated to swing relative to the two sides of the fixing part 1 until the movable rod 2 drives the single stripping sub-head 3 to swing to a relatively proper position, and then the single stripping sub-head 3 is locked and fixed through the locking structure 4, so that the stability between the two parts is effectively ensured, the whole body can be subjected to angle adjustment according to actual conditions, the operation of various angles by workers is greatly facilitated, the actual use value of the whole body is improved, meanwhile, the bent stripping sub-head 3 is designed to change the conventional linear structure, the bent stripping sub-head 8 is adopted, the stripping sub-head 8 is designed in a bent shape, the end part of the stripping sub-head 8 is designed to be in an obtuse angle shape or a sharp shape (as shown in figure 2, a is the obtuse angle-shaped stripping sub-head 8, and b is the sharp-shaped stripping sub-head 8), and the stripping sub-head is fixed, can be according to the actual conditions of operation, through use two peel off sub-head 8 arbitrary one can, make things convenient for operating personnel to operate, reduce the work load of frequently changing the utensil, effectual efficiency that improves the operation.

In the scheme of adopting two son heads of peeling off 8, according to the operation needs select one of them to peel off son head 8 of tip for obtuse angle shape or sharp-pointed shape adaptation and operate can, after using, can swift demolish two and peel off son head 8 and carry out disinfection, clearance or maintenance operation can.

In the above two embodiments, as shown in fig. 1 and 2, the fixing member 1 is a rod-shaped member vertically arranged, the lower end of the rod-shaped member is rotatably connected with the upper end of the movable rod 2, and the upper end of the rod-shaped member is provided with a horizontal hand-held rod 11, so that when operating, a medical worker can operate by holding the hand-held rod 11.

Preferably, an anti-slip structure is disposed on the outer surface of the handheld rod 11, so that the handheld rod 11 is not easily separated when being held.

The anti-slip structure can be lines, an anti-slip sleeve sleeved outside the handheld rod 11, bumps and the like.

In the two embodiments, the fixed member 1 and the movable rod 2 are connected in the following specific manner:

as shown in fig. 3, the lower end of the fixed member 1 is provided with a rotary connecting block 12, the upper end of the movable rod 2 is provided with an installation block 21 corresponding to the rotary connecting block 12, the installation block 21 and the rotary connecting block 12 are arranged in a staggered manner in a horizontal plane and are rotatably connected through a pin 5 horizontally penetrating through the two.

In the two embodiments, the specific structural scheme of the locking structure 4 is as follows:

as shown in fig. 3, a notch 13 is formed in the middle of the lower end of the fixed member 1, two notches 13 are formed in the middle of the lower end of the fixed member 1, two stop plates 22 vertically extending into the notches 13 are formed in the upper end of the movable rod 2, the two rotary connecting blocks 12 and the two mounting blocks 21 are respectively formed in two positions and are distributed in pairs on two sides below the notches 13, the locking structure 4 comprises two sets of elastic telescopic assemblies, the two sets of elastic telescopic assemblies are respectively assembled on the side walls of two ends of the notch 13 at the lower end of the fixed member 1, the upper portion of the stop plate 22 is located between the two sets of elastic telescopic assemblies, the two sets of elastic telescopic assemblies are respectively provided with a stop block 41 at the end close to each other, two ends of the upper portion of the stop plate 22 are symmetrically provided with a slot structure matched with the stop blocks 41 at two, or after the external force is removed, the limiting block 41 is horizontally extended to be clamped with the clamping groove structure at the corresponding end, so that the movable rod 1 and the fixed piece 1 are locked and fixed.

In this embodiment, utilize two sets of elastic telescopic component simultaneous operation (elastic shrinkage) can make the stopper 41 of the two and the draw-in groove structure realization block or the simultaneous separation of ending at board 22 both ends to when the block simultaneously, the firm locking of movable rod 1 can not take place for the pendulum of mounting 1 changes, overall structure reasonable in design, and the cooperation is stable between the structure, can realize light, swift locking and unblock operation movable rod 1 and dead lever 1.

More specifically, as shown in fig. 4, the locking groove structures include a plurality of locking grooves 221 continuously arranged in an arc shape, the limiting block 41 is matched with the locking grooves 221, the movable rod 2 can swing relative to the fixed member 1 to a position where one of the locking grooves 221 at two ends of the stopping plate 22 faces the limiting block 41, and the two sets of elastic telescopic assemblies horizontally extend the limiting block 41 to extend into one of the locking grooves 221 facing the current position of the limiting block after the external force is removed, and are locked with each other.

In this embodiment, a plurality of slots 221 at any end of the resisting plate 22 are distributed in an arc shape, after the movable rod 2 drives the resisting plate 22 to swing to the angle of the adaptation relative to the fixing member (or the limiting block 41) (any end of the resisting plate 22 must have a slot 221 facing the limiting block 41), and then after two sets of elastic telescopic components extend, the limiting block 41 on the elastic telescopic components can extend into the corresponding slot 221, so that the locking of the resisting plate 22 is realized, that is, the locking between the movable rod 2 and the fixing member 1 is realized.

Of course, it is better that the upper portion of the stopping plate 22 is an arc plate surface coaxial with the slot 221 at any end, so that the design appearance is more beautiful, meanwhile, the material is more saved, and the situation that the stopping plate 22 is in contact friction with the bottom wall of the notch 13 during swinging cannot occur, and the spatial layout between the components is more proper.

More preferably, as shown in fig. 3, the elastic telescopic assembly further includes a pull rod 42, a bracket 43, a pull rod handle 44 and an elastic member 45, the bracket 43 is mounted on the outer side of the corresponding end of the lower end of the fixing member 1, the pull rod 42 horizontally penetrates through the side wall of the corresponding end of the notch 13 and the corresponding bracket 43, the end of the pull rod 42 extending into the notch 13 is mounted with the stopper 41, the pull rod 42 penetrates through one end of the bracket 43 and is connected to the pull rod handle 44, the elastic member 45 is mounted in the bracket 43 and is connected between the bracket 43 and the pull rod 42, an external force acts on the pull rod handle 44 to horizontally pull the pull rod 42 outwards and drive the stopper 41 to be separated from the corresponding slot structure, the elastic member 45 is compressed, after the external force is removed, the elastic member 45 returns to the initial state and drives the pull rod 42 to return, and the limiting blocks 41 are engaged with the corresponding slot structures, so as to lock and fix the movable rod 1 and the fixing member 1.

The specific structure of the elastic telescopic assembly is limited in the embodiment, during operation, the external force acts on the pulling handle 44 to drive the corresponding pull rod 42 to move horizontally outwards, so that the elastic part 45 is compressed, the limiting block 41 and the clamping groove 221 opposite to the limiting block are separated from each other (in an unlocking state), then the normal swinging angle adjustment of the movable rod 2 relative to the fixing part 1 can be realized, after the angle adjustment is proper, the pulling handle 44 is loosened (external force is removed), the elastic part 45 can recover the initial state, the pulling rod 42 is driven to move towards the stopping plate 22 through the elastic force until the limiting block 41 and the clamping groove 221 opposite to the limiting block are clamped with each other (in a locking state), and the whole operation is convenient and simple.

Specifically, the pull rod handle 44 may be a rod-shaped member or a vertical plate-shaped member, and one end of the principle bracket 43 is provided with a finger ring for facilitating pulling operation thereof, and the pulling operation can be realized by hooking the finger ring with a finger.

Preferably, the elastic member 45 is a spring, a limiting plate 421 is fixed on an outer periphery of one end of the pull rod 42 extending into the bracket 43, the spring is sleeved on one section of the outer portion of the pull rod 42 extending into the bracket 43, and two ends of the spring are respectively connected with an outer side end of the bracket 43 and the limiting plate 421.

In order to make the locking state of the movable rod 2 and the fixed member 1 more stable, the elastic telescopic assembly includes a plurality of the pull rods 42, the end portion of one end of each corresponding pull rod 42 extending into the notch 13 is equipped with the limiting block 41, and the plurality of limiting blocks 41 and the plurality of clamping grooves 221 on the same side are respectively and rightly clamped to complete the multi-point clamping, so that the locking state is more stable.

As shown in fig. 4, the cross-sectional shape of the slot 221 along the horizontal direction perpendicular thereto is a triangle, one end of the corresponding limiting block 41 near the slot is a triangular prism matched with the triangular prism, and when a plurality of pull rods 42 are arranged in the elastic telescopic assembly of each group, the angle design of the limiting blocks 41 should be distributed in an array of concentric rings, so that the limiting blocks 41 can be smoothly clamped with the slot 221 facing the limiting blocks.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a periosteum elevator of angle of mandible arc osteotomy which characterized in that: including being used for handheld mounting (1), movable rod (2) and the son head (3) of peeling off that is crooked form, movable rod (2) set up, its upper end with the lower extreme of mounting (1) rotates to be connected, and can move towards the lower extreme both sides pendulum of mounting (1) are changeed, be equipped with locking structure (4) on mounting (1), locking structure (4) be used for with movable rod (2) are fixed in the optional position that activity rod (2) swung the commentaries on classics with mounting (1) locking, the head of peeling off son head (3) is down, its upper end with the connection can be dismantled to the lower extreme of movable rod (2).

2. The periosteal elevator for mandibular angle arc osteotomy of claim 1, wherein: the lower extreme of mounting (1) is equipped with rotates connecting block (12), the upper end of movable rod (2) be equipped with rotate installation piece (21) that connecting block (12) correspond, installation piece (21) with rotate connecting block (12) staggered arrangement in the horizontal plane, and run through round pin axle (5) rotation connection of the two through the level.

3. The periosteal elevator for mandibular angle arc osteotomy of claim 2, wherein: a notch (13) with two sides penetrating through the fixing piece (1) is arranged in the middle of the lower end of the fixing piece (1), two stopping plates (22) vertically extending into the notch (13) are arranged at the upper end of the movable rod (2), the rotating connecting block (12) and the mounting block (21) are respectively arranged and are distributed on two sides below the notch (13) in pairs, the locking structure (4) comprises two groups of elastic telescopic components which are respectively assembled on the side walls of two ends of the notch (13) at the lower end of the fixing piece (1), the upper part of each stopping plate (22) is arranged between the two groups of elastic telescopic components, a limit block (41) is arranged at one end of each group of elastic telescopic components which is relatively close to the upper end of the fixing piece (1), two clamping groove structures matched with the limit blocks (41) at two ends are symmetrically distributed at two ends of the upper part of the stopping plate (22), and the two groups of elastic telescopic components can respectively horizontally, or after the external force is removed, the limiting block (41) is horizontally extended to be clamped with the clamping groove structure at the corresponding end, so that the movable rod (2) and the fixing piece (1) are locked and fixed.

4. The periosteal elevator for mandibular angle arc osteotomy of claim 3, wherein: the draw-in groove structure all includes a plurality of draw-in grooves (221) that are the arc and set up in succession, stopper (41) with draw-in groove (221) phase-match, movable rod (2) can for mounting (1) pendulum is changeed to one of them draw-in groove (221) of ending to board (22) both ends just right the position of stopper (41), and two sets of elastic expansion subassembly level extension after removing external force stopper (41) stretch into just one of its current position in draw-in groove (221) to mutual block.

5. The periosteal elevator for mandibular angle arc osteotomy of claim 4, wherein: the elastic telescopic assembly further comprises a pull rod (42), a support (43), a pull rod handle (44) and an elastic piece (45), the support (43) is assembled on the outer side of the corresponding end of the lower end of the fixing piece (1), the pull rod (42) horizontally penetrates through the side wall of the corresponding end of the notch (13) and the corresponding support (43), the end part of one end, extending into the notch (13), of the pull rod (42) is provided with the limiting block (41), the pull rod (42) penetrates through one end of the support (43) to be connected with the pull rod handle (44), the elastic piece (45) is arranged in the support (43) and connected between the support (43) and the pull rod (42), the pull rod (44) is horizontally pulled outwards by external force, the pull rod (42) is driven to separate from the limiting block (41) from the corresponding clamping groove structure, and the elastic piece (45) is compressed, after the external force is removed, the elastic piece (45) restores to the initial state, drives the pull rod (42) to return, enables the limiting block (41) to be mutually clamped with the corresponding clamping groove structure, and accordingly the movable rod (2) and the fixing piece (1) are locked and fixed.

6. The periosteal elevator for mandibular angle arc osteotomy of claim 5, wherein: elastic component (45) are the spring, pull rod (42) stretch into be fixed with limiting plate (421) on the one end periphery of support (43), the spring housing is located pull rod (42) stretch into one section outside of support (43), and its both ends respectively with support (43) outside side end and limiting plate (421) link to each other.

7. The periosteal elevator for mandibular angle arc osteotomy of claim 5, wherein: the elastic telescopic assembly comprises a plurality of pull rods (42), and each pull rod (42) correspondingly extends into one end of the notch (13) and is provided with the limiting block (41).

8. The periosteal dissector for mandibular angle arc osteotomy of any one of claims 1 to 7, wherein: the fixing piece (1) is a rod-shaped member which is vertically arranged, the lower end of the fixing piece is rotationally connected with the upper end of the movable rod (2), and the upper end of the fixing piece is provided with a horizontal handheld rod (11).

9. The periosteal dissector for mandibular angle arc osteotomy of any one of claims 1 to 7, wherein: the upper end of the stripping sub-head (3) is provided with a nut with an internal thread and an upper opening, the lower end of the movable rod (2) is arranged to be a cylindrical connecting part with an external thread, the stripping sub-head (3) is connected with the cylindrical connecting part at the lower end of the movable rod (2) through the nut thread, and the head of the stripping sub-head (3) is arranged to be a blunt angle or a sharp shape.

10. The periosteal dissector for mandibular angle arc osteotomy of any one of claims 1 to 7, wherein: the lower extreme of movable rod (2) is established to the cylinder connecting portion that has the external screw thread to threaded connection has horizontally assembly seat (6) on the cylinder connecting portion, it is equipped with two to peel off sub-head (3), and one of them head is for establishing to obtuse angle shape, and sharp shape is established to another head, two peel off sub-head (3) interval set up in the lower extreme of assembly seat (6), and the head of the two all towards the two relative one side bending of keeping away from, two the upper end of peeling off sub-head (3) all with the lower extreme of assembly seat (6) is connected fixedly.