EVALUATION OF THE EFFICACY OF SURGICAL GUIDES IN A TREATMENT OF SECONDARY ZYGOMA DEFORMITIES

Chepurnyi Y., Chernogorskyi D., Zhukovtseva O., Kopchak A.

DENTISTRY

Scentific article

Treatment of the secondary zygoma deformities still remains a challenging task of maxillo-facial traumatology. It is, due to several negative changes with bone fragments, caused of their wrong positioning andreparative osteogenesis One of the new solutions of this problem became an application of the surgical guides (SG) for zygoma positioning. The aim of this study was to evaluate an efficacy of the SG application for the treatment of secondary zygoma deformities. Object and methods. The treatment results of the thirty-two patient with secondary zygoma deformities were analysed. All patients were divided on two groups, which were equal in number of participants, terms of gender and age. Patients of main group underwent treatment with application of SG, patients of control group – without. All patients were examined before and after surgery with expectation of local and ophthalmologic status, and CT scanning. Precision of the zygoma positioning were evaluated through the superimposition and comparison of virtual models with generation of the “color map” of discrepancies. Orbital volume recovery was evaluated through the comparison of the orbital virtual model after surgery. Results. Mean deviation between reconstructed zygoma and mirrored intact side was 1,4 ± 0,3 mm in main group and 1,9 ± 0,8 mm in control (р=0,004). Maximum deviation between reconstructed zygoma and mirrored intact side was in main group 7,3 ± 2,2 mm, in control – 9,3 ± 2,98 mm (p=0,026). Mean difference between orbital volume of the damaged and intact orbit in main group was 1,3 ± 1,1 cm3 , in control – 2,4 ± 1,4 cm3 (p=0,041). Conclusions. Application of the surgical guides or zygoma positioning in treatment of the secondary zygoma deformities allows to determine high precision of its reposition. This approach showed higher efficacy in accurate positioning of the zygoma and orbital volume recovery comparing with traditional methods, however was equal in frequency of the functional disorders and postsurgical complications.

guided surgery, surgical guide, zygoma deformities.

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«Bulletin of problems biology and medicine» Issue 3 (157), 2020 year, 352-357 pages, index UDK 616.716.3-001-089.843-77

10.29254/2077-4214-2020-3-157-352-357