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International Arab Journal of Dentistry

Abstract

Introduction: Adult orthodontic treatment is increasingly sought due to aesthetic and functional concerns, often involving periodontally compromised patients with altered biomechanics. Reduced bone support shifts the center of resistance and necessitates lower, carefully controlled forces, while finite element modeling has become a key tool to analyze tissue response under such conditions.

Objectives: The study aimed to determine the optimal intrusive force for periodontally compromised maxillary anterior teeth using Finite Element Analysis (FEA).

Methods: A 3D finite element model of the maxillary anterior dentition was created and divided into healthy and compromised halves, the latter with one-third alveolar bone loss. A 15 g intrusive force was applied to both sides to compare stress distribution. The force on the compromised side was reduced until stress levels matched those of the healthy periodontium.

Results: The compromised periodontium showed higher stress and displacement than the healthy side under a 15 g force. Reducing the force to 13.4 g per tooth produced stress comparable to the healthy periodontium.

Conclusions: An intrusive force of 13.4 g per tooth is optimal for periodontally compromised maxillary anterior teeth, maintaining similar stress and displacement without overloading compromised tissues.

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