CN203988297U - Sagittal condylar fracture reduction forceps - Google Patents

Abstract

Condylar sagittal fracture reduction pliers include a pair of pliers bodies that are hinged together. The pliers body includes a handle and a pliers head. It is characterized in that the pliers head bends downward while bending inward. At the end, the cross-sectional size gradually becomes smaller, and the free end of the pliers head of one of the pliers is provided with a chuck whose side is an enlarged plate surface. Compared with the prior art, the utility model has the advantages of sufficient exposure field of vision, avoiding surrounding blood vessels and nerves, clamping and assisting the reduction of free condylar sagittal fractures, and uniform force on the surface of fracture fragments without crushing.

Description

Condylar sagittal fracture reduction forceps

Technical field:

The utility model relates to a medical appliance.

Background technique:

The incidence of sagittal condylar fractures accounts for about 9% to 45% of mandibular fractures. Its treatment has always been the focus and difficulty of oral and maxillofacial trauma. If not treated properly, it is easy to cause traumatic arthritis, ankylosis and other related complications disease. The reasons why sagittal condylar fractures are more difficult to treat than other maxillofacial fractures are: ①The surgical field of view is narrow, located in the deep side of the face, and the position is deep, and doctors cannot anatomically reduce the condyle under direct vision; ②Condylar condyle occurs After the sagittal process fracture, the free medial condylar sagittal fracture fragment shifts inwardly, anteriorly, and inferiorly to the deep side of the face. Due to the lack of suitable surgical instruments, doctors can only use nerve strippers, curved hemostats, Alis Use blind/semi-blind detection methods to find free medial condylar sagittal fracture fragments based on clinical experience; ③ After capturing free medial condylar sagittal fracture fragments, use curved forceps or similar During the reduction process of the instrument, the "secondary fracture" of the fracture fragment is often caused, and more small bone fragments are formed, which increases the difficulty of treatment. Difficult to bend forceps reset, often need to cut off the tendon to completely dissociate the fracture and reset, which means that the blood supply of the condyle is stripped, resulting in the absorption of the condyle after operation; Important vascular and nerve tissues, such as the main trunk and branches of the facial nerve, the posterior facial vein, and the internal maxillary artery, etc., may easily cause damage to the anatomical structure by using inappropriate instruments during operation, resulting in a higher complication rate of condylar sagittal fracture surgery than that of maxillofacial fractures. Other surgeries in the department, such as internal maxillary artery hemorrhage, facial paralysis, etc.

The purpose of surgical treatment of sagittal condylar fractures is to restore the normal smooth articular surface and ramus height. In order to achieve the expected surgical effect, it is necessary to anatomically reduce the free sagittal condyle fragments displaced anteriorly, medially, and inferiorly, and internally fix them with compression screws or microtitanium plates.

Invention content:

The purpose of the invention of this utility model is to provide a sagittal condylar fracture with sufficient exposure field of view, avoiding peripheral blood vessels and nerves, clamping and assisting free condylar sagittal fracture reduction, and uniform force on the surface of the fracture block without being crushed. Reset pliers.

The utility model is achieved in this way, including a pair of pliers bodies hinged together, the pliers body includes a handle and a pliers head, and its special feature is that the pliers head bends downwards and inwards at the same time, and the pliers head starts from the hinge point To the free end, its cross-sectional size gradually becomes smaller, and the free end of the pliers head of one of the pliers is provided with a chuck whose side is an enlarged plate surface.

When in use, the tissue behind the sagittal articular surface of the condyle is first cut open, and the curved forceps head of the utility model bypasses the articular fossa behind the sagittal articular surface of the condyle, and the sagittal joint of the condyle that falls The bone fragments are clamped and moved back to the sagittal articular surface of the condyle, then. Fix it with the condylar sagittal joint with nails.

The utility model adopts the forceps head to bend downwards and inwards at the same time, so that the gap between the sagittal articular surface of the condyle and the cranium can be effectively used to extend into the articular fossa to clamp the fallen broken bone and move along the joint. The gap moves the broken bone back to the original position on the sagittal articular surface of the condyle, and the side set by the free end of one of the forceps is used as a clamp to widen the plate surface, and the free end of the other forceps is kept Thin end face, when clamping, the thin end face of the other pliers head faces the section of the broken bone, and the widened plate on one of the pliers heads faces the outer surface of the broken bone, and the thin end face can adapt to irregularities The widened plate fully contacts the smooth outer surface, which can effectively clamp the broken bone, and at the same time, the wide contact surface of the plate can effectively disperse the clamping force to the outer surface of the broken bone. surface, to avoid pinching the bone fragments. From the hinge point to the free end, the cross-sectional size of the pliers gradually becomes smaller, which makes it easy for the pliers to penetrate into the articular fossa, and at the same time prevents the protruding pliers from affecting the line of sight. The inward bending of the pliers can reduce the width of the pliers when they are opened.

In order to prevent broken bones from sliding down from the pliers heads, several projections are provided on the plate surface of one of the pliers heads, and several projections are provided on the thin end surface of the free end of the other pliers head.

Compared with the prior art, the utility model has the advantages of sufficient exposure field of view, avoiding surrounding blood vessels and nerves, clamping and assisting the reduction of free condylar sagittal fractures, and uniform force on the surface of fracture fragments without crushing.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Figure 2 is a partial enlarged view of point A in Figure 1;

Figure 3 is a schematic diagram of the reduction of the medial sagittal fracture fragment of the condyle.

Detailed ways:

Now in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

As shown in the figure, the utility model includes a pair of pliers bodies 1 hinged together. The pliers body 1 includes a handle 1a and a pliers head 1b. The special feature is that the pliers head 1b bends downward while bending inward. The head 1b starts from the hinge point to the free end, and its cross-sectional size gradually becomes smaller. The free end of the pliers head of one of the sub-pliers body 1b is provided with a chuck 1d whose side is an enlarged plate surface 1c.

Here, the downward curvature of the forceps head 1 b corresponds to the curvature of the sagittal articular surface 2 of the condyle. The diameter of the downward curved arc of the pliers head 1b is between 50-70mm.

When clamping, the distance between the outer sides of the two clamp heads 1b is not greater than 10mm.

In order to prevent the broken bone 3 from slipping off the forceps head 1b, several protrusions 4 are provided on the plate surface 1c on one of the forceps heads 1b, and several protrusions 5 are provided on the thin end surface of the free end of the other forceps head 1b.

The protrusion 4 provided on the plate surface 1c is a cone.

The protrusion 5 provided on the thin end surface of the free end of the other pincer is in the shape of a knife edge.

As shown in Figure 3, the utility model utilizes the gap 7 between the sagittal articular surface 2 of the condyle and the cranium 6 to extend into the articular fossa 8 to clamp the fallen broken bone 3 and along the gap 7 the broken bone 3 Move back to the original position on the sagittal articular surface 2 of the condyle.

Claims (10)

1. Sagittal condylar fracture reduction forceps, comprise a hinged antithetical phrase caliper, sub-caliper comprises handle, binding clip, it is characterized in that binding clip is reclinate curves inwardly simultaneously, binding clip is started to free end by pin joint, its sectional dimension progressively diminishes, and to be provided with side be the chuck of widening plate face to the free end of the binding clip of a sub-caliper therein.

2. Sagittal condylar fracture reduction forceps according to claim 1, is characterized in that the reclinate radian of binding clip is corresponding with the radian of the cambered surface of the prominent sagittal articular surface of condyle.

3. Sagittal condylar fracture reduction forceps according to claim 2, is characterized in that the diameter of the circular arc that binding clip is reclinate is between 50-70mm.

4. according to the Sagittal condylar fracture reduction forceps described in claim 1 or 2 or 3, while it is characterized in that clamping, the distance between two binding clip outsides is not more than 10mm.

5. according to the Sagittal condylar fracture reduction forceps described in claim 1 or 2 or 3, it is characterized in that being provided with several ridges on the plate face on a binding clip wherein, the free-ended thin end face of another binding clip is provided with several ridges.

6. Sagittal condylar fracture reduction forceps according to claim 4, is characterized in that being provided with several ridges on the plate face on a binding clip wherein, and the free-ended thin end face of another binding clip is provided with several ridges.

7. Sagittal condylar fracture reduction forceps according to claim 5, is characterized in that the set ridge of plate face is taper thing.

8. Sagittal condylar fracture reduction forceps according to claim 6, is characterized in that the set ridge of plate face is taper thing.

9. Sagittal condylar fracture reduction forceps according to claim 5, is characterized in that the set ridge of the free-ended thin end face of another binding clip is blade-like.

10. Sagittal condylar fracture reduction forceps according to claim 6, is characterized in that the set ridge of the free-ended thin end face of another binding clip is blade-like.