The effect of the roots left in the mandible after coronectomy on the fragility of the mandible against trauma
Project no. 23759 · Status: Kapanmış (Yayın bekleniyor) · 2022
Summary
<p><strong>Aim: </strong>The objective of this study was to examine the impact of complete extraction, coronectomy and no extraction of deeply impacted third molars on mandibular strength. To this end, the region or regions where stress concentration occurs in different mandible models were identified through the use of a 3D modelling technique that can imitate the real jaw.</p><p><strong>Materials and Methods: </strong>In the present study, 3 mandibles in Pell-Gregory class C, mesioangular position with completely extracted, non-extracted, coronectomised roots were modelled by finite element analysis method. These models were analysed implicitly or explicitly by applying a force of 2000 N from the ipsilateral and contralateral directions from the mandibular symphysis and ramus region.</p><p><strong>Results: </strong>In the analysis of the symphyseal region, although coronectomy and complete tooth removal increased the maximum principal stress and maximum normal strain values, no significant increase was observed. For forces from the ipsilateral and contralateral regions, coronectomy or complete tooth removal decreased the maximum principal stress and maximum normal strain values.</p><p><strong>Conclusion: </strong>Patients with impacted mandibular wisdom teeth have higher stress values from lateral impacts to the mandible than from impacts to the mandibular symphysis, rather than from the impacted tooth itself. Complete removal of the tooth may increase the risk of mandibular fractures compared with coronectomy, but may have little effect on condylar fractures.</p>