Device for extraoral distraction

 

(57) Abstract:

Scope: the invention relates to medical equipment, namely to dental devices for distraction of the upper jaw in the right direction after osteotomy in patients with mesial occlusion, as well as to reposition the upper jaw when it fractures with displacement. The inventive device for extraoral distraction contains frontal reference arc with locking strap, curved barbells, rigidly connected with the frontal arc and arc-bracket, pilots, on the cheekbones and pilots with locking occipital strap on the mastoid processes. Arc-bracket rigidly connected to the traction elements. 1 Il.

The invention relates to medical equipment, namely to dental devices for the implementation of istratii the upper jaw in the right direction after osteotomy in patients with mesial occlusion, as well as to reposition the upper jaw when it fractures with displacement.

A device for the immobilization of bone fragments or osteotomies fragments of the upper jaw with wire nazebnych tires and skeletal traction. Hold fragments of the jaws in the correct olook on the tripod at the end of the bed with the weight of 1.5-2 kg Head fixed with protivostojaniem, strengthened over the bandage covering his forehead and chin. The connecting element between the unit load and nasobny bus is a wire loop. If the day cannot fix the offset, the load is reduced to 1 kg, and 5 days to replace the extraoral traction to the headband by Wasmund, which fixes the position of the fragments of the jaw. When successful for bone spike is formed after 4 weeks, in more complex cases 6 to 8 weeks. Such a device stretching a fragment or a fragment of the upper jaw is often accompanied by consolidation in the wrong position, which manifests itself in the form of malocclusion and unsatisfactory aesthetic perception of the face of the patient. After that, you want to osteotomy or to adjust the ratio of the jaws with the help of prostheses. The disadvantage of this device is the need bed rest and prolonged fixation of the patient to the unit, which is strengthened on the bed. In addition, significantly hampered eating, hygiene care and the possibility of complex physical therapy.

The aim of the invention is dosed in strength and time, adjustable in 3 mutually perp the enterprises.

This objective is achieved in that the device for extraoral distraction, containing elements of stretching, according to the invention, contains the frontal reference arc with locking strap, curved barbells, rigidly connected with the frontal arc and arc-bracket, pilots on the zygomatic bone and pilots with locking occipital strap on the mastoid processes, while the arc-bracket rigidly connected to the traction elements.

In the proposed design pilots, closely adjacent to the front end of the outer surface of the zygomatic bone and the mastoid processes, are additional areas of support for the distraction. The lack of rigid fixation device to the skull and providing reliable support for the distraction allows the traction elements, which are slings, screw and wire loop, gradual, adjustable in 3 mutually perpendicular planes moving fragments. The safety locking device to the skull is secured by rods, bent to the configuration of the face and the direction of stretching, and rigidly connected with the frontal arc and arc-bracket. These signs are new, in the known solutions of the authors was not found, therefore the image is postal distraction, the overall look. The device comprises a frontal reference arc 1 with the fixing belt 2; curved rod 3, rigidly connected with the frontal arc by means of screw marks 4 and pre-curved with regard to the configuration of the face and the future stretching; pilots 5, 6 of the rapid hardening of the plastic on the zygomatic bone and the mastoid processes. Pilots 6 on the mastoid processes attached to the fixing of the occipital strap 7. Arc-bracket 8 are rigidly connected to curved rods 3 and the traction elements. The traction elements contain wire loop 9, lines 10 and screw 11. The device is used as follows. Before the operation is carried out, the adjustment device in accordance with the characteristics of the individual buildings of the skull so that when the overlay device arc-bracket 8 was located at the level of the line of closing the lips. Pilots 5, 6 are flush to the front outer surface of the zygomatic bone and the mastoid processes. Pilots receive by imposing on curved barbells 3 rapid hardening plastic. The teeth of the upper jaw overlap wire nasonia tires. On day 7 after osteotomy of the upper jaw device is secured in the described manner on the patient's head. Arc-bracket 8 is rigidly soy is by using the screw 11 and the straps 10, the degree of tension of which is regulated daily.

P R I m m e R. Patient 19 years of age, and/b N 26030, has addressed in clinic 18.12.1990, with complaints of difficulty in biting and chewing the food, the aesthetic disadvantage of the person. The patient underwent clinical examination and findings: combined dental-craniofacial anomaly, due to the upper micro - and retrognathia, dystonia canines, lower prognathia. Anterior bite, concave profile, reducing the vertical dimension of the middle third of the face. On this basis it was decided to carry out patient surgery on the upper jaw with the use of distraction in the postoperative period. 24.12.90, under endotracheal anesthesia, the patient was held horizontal osteotomy of the maxilla, savings osteotomy (decorticate) alveolar ridge between 3 and 4 to the right and to the left with destruction 4/4 teeth. On the 7th day after the operation on the head of the patient was fixed device for extraoral distraction. The distraction was carried out using a sling attached with one side to nasobny the bus on the upper jaw for stretching it forward and obliquely downward. The gradual shift of fragments and 3/3 of the teeth was carried out for 4 - 5 weeks from activation ka is adanta roaming teeth and jaw fragments. Then the patient was made removable plastic tire on the retention period. Received good aesthetic and morphological results.

A similar treatment was carried out in patients of 10 people for 1990

The use of the device allows to obtain the following positive result:

the result is dosed in strength and time (gradual), adjustable in 3 mutually perpendicular planes moving jaw fragments;

- facilitated the conduct of post-operative treatment measures;

- achieved a stable result of the treatment.

- simultaneous transfer and fixing as separate fragments of jaw and skull;

- it is possible to simultaneously perform correction of the position of the lower jaw and skull.

DEVICE FOR EXTRAORAL DISTRACTION, containing the elements of traction and support, characterized in that the support is executed in the form of a frontal arc with locking strap, curved rods, rigidly connected with the frontal arc, arc - bracket, pilots on the zygomatic bone and pilots with locking occipital strap on the mastoid processes, while the arc-bracket rigidly connected with elements vitagen the

 

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