Title

Effect of labio-lingual inclination on mandibular anterior teeth displacement and stress distribution with fixed lingual retainers: A finite element study

Authors

Gunjan Bhansali¹, Javed Sodawala^2,*, Mohammad Ullah Khan³, Heli Dholakia⁴, Amar Kingaonkar⁵ & Rajnee Yadav⁶

Affiliation

¹Department of Orthodontics and Dentofacial Orthopedics, VYWS Dental College and Hospital, Tapovan-Wadali Road, Amravati, Maharashtra, India; ²Department of Orthodontics and Dentofacial Orthopedics, Chhattisgarh Dental College and Research Institute, Sundara, GE Road, Rajnandgaon, Chhattisgarh, India; ³Department of Orthodontist, Tobal Dental Clinic, Buraidah, Al Qassim, Saudi Arabia; ⁴Department of Orthodontist, Glen Orthodontics, Glenview, USA; ⁵Department of Dentistry, BSP Medical College, Bhalgaon, Chhatrapati, Sambhajinagar, Maharashtra, India; ⁶Department of Prosthodontics, Eklavya Dental college & Hospital kotputli, Jaipur, Rajasthan, India; *Corresponding author

Email

Gunjan Bhansali - E-mail: bhansali.gunu@gmail.com; Phone: +91 8275836788
Javed Sodawala - E-mail: drjavedazher@gmail.com; Phone: +91 7000858658
Mohammad Ullah Khan - E-mail: dr.mkhan1987@hotmail.com
Heli Dholakia - E-mail: helidholakia93182@gmail.com
Amar Kingaonkar - E-mail: amarkingaonkar@gmail.com
Rajnee Yadav - E-mail: rajniy7@gmail.com

Article Type

Research Article

Date

Received February 1, 2026; Revised February 28, 2026; Accepted February 28, 2026, Published February 28, 2026

Abstract

Labio-lingual displacement and stress distribution of mandibular anterior teeth may be altered by changes in incisor inclination, and the role of a lower lingual fixed retainer in modifying these effects remains unclear. Therefore, it is of interest to determine the effect of the presence of a lower lingual fixed retainer and variation in labio-lingual inclination on displacement patterns and cervico-apical stress distribution of surrounding tissues. Eight 3D finite element models of the anterior mandible were constructed, and incisor inclination was modified to 80°, 90°, 100°, and 110° relative to the mandibular plane in retainer and non-retainer groups. A vertical load of 187 N was applied to evaluate labio-lingual displacement, periodontal ligament (PDL) stress distribution, and strain energy. The findings showed that displacement patterns, cervico-apical stress distribution, and strain energy were comparable in both groups. It can be concluded that mandibular anterior inclination influences biomechanical response, while the presence of a lingual fixed retainer does not significantly alter stress distribution or displacement patterns.

Keywords

Labio-lingual displacement, von mises stresses, strain energy, mandibular anterior teeth, fixed lingual retainer.

Citation

Bhansali et al. Bioinformation 22(2): 947-952 (2026)

Edited by

Hiroj Bagde

ISSN

0973-2063

Publisher

Biomedical Informatics

License

This is an Open Access article which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. This is distributed under the terms of the Creative Commons Attribution License.