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Assessment of Relative Bite Force Following Bi-Jaw Orthognathic Surgeries Using T-Scan.

P S Tripthi¹, Subhajit Das¹, Chethan Hegde²

¹Department of Oral and Maxillofacial Surgery, AB Shetty Memorial Institute of Dental Sciences (ABSMIDS), Nitte (Deemed to Be University), Mangalore, India.

Journal of Maxillofacial and Oral Surgery

|November 27, 2025

Summary

Orthognathic surgery improves facial aesthetics and occlusion stability. Bi-jaw surgery significantly reduced bite force imbalance, indicating a more balanced occlusion post-operation.

Keywords:

Bite force Masticatory system Occlusion Orthognathic surgery

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Area of Science:

Dental surgery
Orthodontics
Biomechanical analysis

Background:

Skeletal malocclusions often require orthognathic surgery for improved facial aesthetics.
Achieving stable occlusion is a critical goal alongside esthetic improvements in orthognathic surgery.

Purpose of the Study:

To analyze the functional occlusion after bi-jaw orthognathic surgery.
To evaluate the relative distribution of bite force using T-Scan technology.
To assess changes in occlusal load balance.

Main Methods:

Prospective study of 40 patients (18-32 years) with skeletal malocclusions.
Bi-jaw orthognathic surgeries were performed.
T-Scan device used to measure relative bite force difference pre-operatively and at 3 months post-operatively.

Main Results:

The study included 40 patients (14 males, 26 females) with a mean age of 22.7 years.
Mean bite force difference reduced from 27.95% pre-operatively to 16.85% post-operatively.
A statistically significant decrease in relative bite force imbalance was observed.

Conclusions:

Post-operative reduction in bite force difference suggests improved occlusal load distribution.
Orthognathic surgery leads to a more balanced occlusion.
Functional occlusal analysis is key to assessing surgical outcomes.