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Master Thesis

Étude de la stabilité osseuse et des tissus mous à long terme après génioplastie avec l'utilisation d'une ostéosynthèse rigide par plaque(s) et vis monocorticales en titane

Abstract : Introduction: genioplasty osteosynthesis techniques have progressed over time, particularly in the quest for better long-term bone stability. This thesis consisted in the study of the long-term bone stability after genioplasty using a rigid fixation with titanium plate(s) and monocortical screws. Material & Methods: it was a retrospective study achieved between January 1, 2010 and December 31, 2019 at the University Hospital Center in Caen. Stability was defined as long-term bone loss of less than 2 mm. The measurements were made in the sagittal and vertical planes, at the preoperative T0, early postoperative TP and late postoperative T4 times. Results: 30 patients (divided into 2 subgroups of 25 and 5 subjects) were included, with an average follow-up of 3.24 years. Subgroup 1: the average sagittal bone advance at TP was 4.06 mm, with bone loss at 0.65 mm at T4 (p = 0.001). This relapse had no clinical impact because it was less than 2 mm. The mean vertical bone movement was 1.25 mm at TP, with a relapse at T4 of 0.34 mm (p = 0.27). The ratio of bone to soft tissue movement at T4 in the sagittal plane was 78%. Subgroup 2: the mean sagittal bone recoil at TP was 2.88 mm, with a loss of 0.41 mm at T4 (p = 0.42). The average vertical bone movement was 1.92 mm at TP, with a relapse at T4 of 0.70 mm (p = 0.31). Conclusion: osteosynthesis with titanium monocortical plate(s) and screws in genioplasties is stable over the long term, with a bone / soft tissue predictability ratio of 78% in advanced genioplasties.
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Master Thesis
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Submitted on : Thursday, September 17, 2020 - 2:10:28 PM
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Alexandre Masson. Étude de la stabilité osseuse et des tissus mous à long terme après génioplastie avec l'utilisation d'une ostéosynthèse rigide par plaque(s) et vis monocorticales en titane. Médecine humaine et pathologie. 2020. ⟨dumas-02941888⟩

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