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In Vitro Evaluation of the Effects of Different Fixation Methods on Stabilization of Mandibular Body Fractures

Polat, Mehmet Emrah, PhD*; Dayi, Ertunc, MD

doi: 10.1097/SCS.0000000000005385
Original Article: PDF Only

Purpose: Mandibular body fractures are considered to be one of the most affected fracture sites in the maxillofacial region. Although the rates of fracture in this region are high, biomechanical evaluations related to this region are rare. The purpose of this investigation was to reveal the effects of different treatment methods onmandibular body fractures.

Method: Twenty-five synthetic polyurethane hemi-mandibles were used in this study. The hemi-mandibles, which simulated simple unfavorable mandibular body fractures, were divided into 5 groups (n = 5/group) according to the treatment method. The bone segments were fixed using different osteosynthesis methods and 2.0 mm miniplate/screw systems. The groups consisted of locking or conventional systems, 5 or 11 mm long screws and 4 or 6 holes. The hemi-mandibles were loaded vertically with compressive strength until they reached 120 N.

Results: The results were analyzed using Tamhane's T2 post hoc test, and the significance level was 0.05. Group 1 had the lowest mechanical resistance of all groups and group 5 had the highest. No significant differences were observed in group 2 or 3.

Conclusion: The locking system miniplate group showed better fixation stability than the conventional systems for the same screw length, and the number of holes and screw length seemed to be effective for stabilization.

*Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Harran University, Sanliurfa

Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ataturk University, Erzurum, Turkey.

Address correspondence and reprint requests to Mehmet Emrah Polat, PhD, Assistant Professor, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Harran University, Sanliurfa, 63100, Turkey; E-mail:

Received 27 July, 2018

Accepted 27 December, 2018

The authors report no conflicts of interest.

© 2019 by Mutaz B. Habal, MD.