Three-dimensional Regional Displacements After Mandibular Advancement Surgery: One Year of Follow-up

Overview

Journal J Oral Maxillofac Surg

Specialties Dentistry
General Surgery

Date 2011 Jan 25

PMID 21256643

Citations 14

Authors

Alexandre T Motta

Lucia H S Cevidanes

Felipe A R Carvalho

Marco A O Almeida

Ceib Phillips

Affiliations

Soon will be listed here.

Abstract

Purpose: To evaluate the association of 3-dimensional changes in the position of the condyles, rami, and chin at splint removal and 1 year after mandibular advancement surgery.

Patients And Methods: This prospective observational study used preoperative and postoperative scans of 27 subjects presenting with a skeletal Class II jaw relationship with a normal or deep overbite. An automatic technique of cranial base superimposition was used to assess the positional and/or remodeling changes in the anatomic regions of interest. The displacements were visually displayed and quantified using 3-dimensional color maps. The positive and negative values of surface distances in the color maps indicated the direction of the displacements. Pearson correlation coefficients and a linear model for correlated data were used to evaluate the association between the regional displacements.

Results: The postoperative adaptations in the chin position between splint removal and 1 year after surgery were significantly negatively correlated with changes in the borders of the posterior ramus (left, r = -0.73, P ≤ .0001; and right, r = -0.68, P = .00) and the condyles (left, r = -0.53, P = .01; and right, r = -0.46, P = .02), indicating that these structures tended to be displaced in the same direction. Even though the mean condylar displacement with surgery was less than 1 mm, individual displacements greater than 2 mm with surgery were observed for 24% of the condyles. The condylar displacements were maintained at 1 year after surgery for 17% of the condyles.

Conclusions: The surface distance displacements indicated that the postoperative adaptations at different anatomic regions were significantly related.

Citing Articles

Three-dimensional long-term assessment of soft tissue stability after orthognathic mandibular advancement for class II malocclusion correction.

Franco A, Cevidanes L, Koerich L, Silva L, Almeida R, Carvalho F Clin Oral Investig. 2025; 29(3):167.

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Modeling the effect of bilateral sagittal split osteotomy on posterior, superior and medial space dimensions of the temporomandibular joint: a retrospective controlled cohort study.

Hupp L, Verius M, Bertram A, Kolk A, Emshoff R BMC Oral Health. 2023; 23(1):302.

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Long-term three-dimensional condylar remodeling during presurgical orthodontics and after orthognathic surgery of mandibular retrognathia with high mandibular plane angle.

Al-Rezami K, Abotaleb B, Alkebsi K, Wang R, Al-Nasri A, Sakran K Clin Oral Investig. 2022; 26(12):7253-7263.

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Long-term stability and condylar remodeling after mandibular advancement: A 5-year follow-up.

Ehardt L, Ruellas A, Edwards S, Benavides E, Ames M, Cevidanes L Am J Orthod Dentofacial Orthop. 2021; 159(5):613-626.

PMID: 33712310 PMC: 8089060. DOI: 10.1016/j.ajodo.2019.11.022.

Condylar response to large mandibular advancement combined with maxillary impaction and counterclockwise rotation: A computed tomographic study.

Vale F, Francisco I, Scherzberg J, Guimaraes A, Caramelo F, Malo L J Clin Exp Dent. 2018; 10(9):e891-e901.

PMID: 30386522 PMC: 6203919. DOI: 10.4317/jced.54933.

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