Özet:

Objective: The purpose of this study is to assess the early postoperative stability of screw systems with mini plates in the treatment of open reduction mandibular angulus fractures. Material and Method: This study consisted of 3 groups of mini plate or screw fixation: a 1.6 mm diameter drill for Group 1, a 1.2 mm diameter drill for Group 2, and self-drilling screws without drilling in Group 3. We used 9 hemimandibles, 9 plates, and 36 screws in each group. We compared the self-tapping and self-drilling screw systems while maintaining the plate system constant. We generated angulus fractures in 27 hemimandibles taken from 14 sheep mandibles. We separated the samples into 3 groups, each with 9 hemimandibles. All the screws used in the study were 2 mm in diameter and 5 mm in length. We used the servo hydraulic test unit to apply force to the hemimandibles. We applied forces of 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, and 150 N to the hemimandibles and recorded the resulting displacements. Data were analyzed with IBM SPSS V23, and conformity to normal distribution was evaluated by the Shapiro-Wilk test. Results: There was no difference between the groups in terms of the amount of displacement that occurred as a result of the applied forces. Conclusion: In the treatment of mandibular fractures with open reduction, surgeons should focus on plate-related parameters rather than self-drilling and self-tapping of screws, or drill diameter.

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