SU1292739A1 - Arrangement for reposition and fixing of bone fractures of lower jaw - Google Patents

Abstract

The invention is intended for maxillofacial surgery and improves the accuracy of matching bone fragments by increasing the number of degrees of freedom. The device contains two clamp-holder 1 each with two jaws 7, two removable handles 6, one of which is spring-loaded. The clamps are connected by a barbell arc 2 through ball joints 3 with locking screws 4. Clips 1 capture two fragments of bones simultaneously. The cuts on I / 2, executed in sponges, their lengths provide tighter pressing. sponges to the curved surface of the fragments of the jaw. The ratchet mechanism on the axles of the clamps ensures reliable fixation of the fragments. Perform the reposition of fragments. Fix the locking screws 4. Conduct osteoplastic operations, then remove the device. To do this, remove the handles 6 and pull out the ratchet paw from the engagement. The reposition of fragments is carried out in any plane of rotation. I zp f-ly, 2 ill. with ate with eo; o SD FIG .1

Description

112

The invention relates to medicine, namely to instruments for maxillofacial surgery.

The aim of the invention is to improve the accuracy of the comparison of bone fragments by increasing the number of degrees of freedom.

Figure 1 shows the device, top view; figure 2 is the same, side view.

The device consists of two clamping frame holders 1 interconnected by a movable removable rod-arc 2 through four ball joints 3, which are blocked by two locking screws 4 of double spherical connection 5. Clamp-holder 1 has removable handles 6. Distal The ends of the clamping hinges are pivotally connected and terminate with jaws 7 for grasping jaw fragments. One of the grips of the clamp holder has a spring plate 8. A ratchet wheel 9 is installed on the connecting axis of each of the clip holders, which is locked with a dog 10. On the lips 7 of the bone clamp clips 1, a longitudinal cut is made 1/2 of their length. The device contains locking elements in the form of screws 11 and 12, pins 13 and retainer springs 1A, as well as an auxiliary key-screwdriver (not shown).

The device works as follows.

After anesthesia, the necessary incision of soft tissues and the exposure of fragments, the device is taken by hand with the hands of 6 clamps-bone holders. lei} and seize both fragments of bones with sponges 7 at the same time, and the incisions made on 1/2 of the length of the sponge ensure that the sponge is more closely pressed to the curvilinear surface of the jaw fragments.

The pressing force of the handles and the squeezing of fragments is metered by means of a ratchet mechanism, which prevents retraction, i. carries out reliable fixation of fragments in the clamps-bridges 1, after which the reparation of fragments by hand is performed by means of a movable connection between clamps-bridges, made in the form of an arc rod 2. and four ball balls-3. This connection allows 27392

To move bone fragments in any plane of rotation. In the required position, the bone holders are fixed by twisting the two locking screws 5 of 4 double spherical connections 5. Next, osteoplastic operations are performed to replace the bone defects of the mandible of any location and the size of the defect using 10

five

20

the use of existing types of suture bone (wire, polyamide filament, outer metallic plates, allografts, etc.). At the conclusion of the operation, depending on the indications, the device can be completely removed, for which the pawl 10 is taken out of the engagement in the ratchet wheel 9 by pressing the latch of the pawl 10, or used to fix fragments in the postoperative period. In this case, remove the handle 6 clamp-bone holders 1, unscrew the locking screws 11.

25 Prolonged traumatizing mgs :. tissues in the mandibular bone fractures are predisposing factors for the development of purulent-infectious complications in the postoperative period. The use of the device reduces the trauma of surgical intervention due to its design features, namely by providing the opportunity

3g simultaneously capture both fragments and securely fix them in the jaws of the bone holders. Thus, the repair of fragments is performed with reliably and simultaneously fixed bone fragments, which excludes the possibility of additional injury. In this case, the device provides for the reposition of fragments in any plane in rascheni. 45

Claims (1)

Invention Formula 1 .DIPP reposition device and fixation of mandible bone fragments, 50 containing two clamps-bone holders, hinged together,. fixation elements and handles, characterized in that, in order to increase the accuracy of matching the bone fragments by increasing the number of degrees of freedom, it is equipped with a volumetric arc-rod connecting the bone-clamping clips and two ratchets mounted on the axis of the clamp-bone-holders This joint is made in the form of two pairs of ball joints, one of the joints of each pair is rigidly fixed to the clamp-hanger holder, and the second one at the corresponding end of the rod-arc, 2, the apparatus according to claim. I, characterized in that the handles are removable. ten FIG g Editor K. Voloshchuk Compiled by L, Gokhstein Tehred L. Oleinik Order 306/4 Circulation 596 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Who is p T.Kolb