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Issue: Vol. 562 No. 2 (2026)
Section: Các bài báo
DOI: 10.51298/vmj.v562i2.18845
Date Published: 06/09/2026
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How to Cite
Lê , T. H., Trần , Á. K., Nguyễn , M. H., & Nguyễn , H. K. (2026). CONDYLAR POSITIONAL CHANGES AFTER BILATERAL SAGITTAL SPLIT RAMUS OSTEOTOMY COMBINED WITH LE FORT I OSTEOTOMY. Vietnam Medical Journal, 562(2). https://doi.org/10.51298/vmj.v562i2.18845

CONDYLAR POSITIONAL CHANGES AFTER BILATERAL SAGITTAL SPLIT RAMUS OSTEOTOMY COMBINED WITH LE FORT I OSTEOTOMY

Tấn Hùng Lê 1, , Ái Khiêm Trần 2, Mỹ Huyền Nguyễn 1, Hoàng Khang Nguyễn 1
1 School of Medicine and Pharmacy, Tra Vinh University
2 Hong Bang International University

Main Article Content

Abstract

Objective: Evaluate short- and medium-term changes in condylar position using cone-beam computed tomography after mandibular advancement by bilateral sagittal split ramus osteotomy combined with Le Fort I osteotomy.


Methods: A descriptive retrospective study was conducted in 25 patients. CBCT data of 50 temporomandibular joints were obtained before surgery (T0), immediately after surgery (T1), 3 months after surgery (T2), and at the final follow-up after 12.1 ± 3.0 months (T3). The condyle-fossa relationship was assessed using the Pullinger and Hollender method.


Results: The ln(PS/AS) value changed significantly over time, with no significant difference between the right and left condyles. The condyles moved inferoposteriorly immediately after surgery and then anterosuperiorly at 3 months. The superimposed change indicated a posterosuperior condylar position compared with baseline, which remained relatively stable at 1-year follow-up.


Conclusion: Condylar positional changes occurred after BSSO combined with Le Fort I osteotomy. The condyles tended to return to a more concentric position by 3 months and remained stable during the 1-year follow-up.

Keywords

BSSO, condyle, cone-beam computed tomography, Le Fort I osteotomy, orthognathic surgery

Article Details

References

1. Frey DR, Hatch JP, Van Sickels JE, et al: Effects of surgical mandibular advancement and rotation on signs and symptoms of temporomandibular disorder: A 2-year follow-up study. Am J Orthod Dentofacial Orthop 133:490, 2008
2. Kim YI, Jung YH, Cho BH, et al: The assessment of the short- and long-term changes in the condylar position following sagittal split ramus osteotomy (SSRO) with rigid fixation. J Oral Rehabil 37:262, 2010
3. Kim YI, Cho BH, Jung YH, et al: Cone-beam computerized tomography evaluation of condylar changes and stability following two-jaw surgery: Le Fort I osteotomy and mandibular setback surgery with rigid fixation. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 111:681, 2013
4. Motta AT, Cevidanes LH, Carvalho FA, et al: Three-dimensional regional displacements after mandibular advancement surgery: One year of follow-up. J Oral Maxillofac Surg 69:1447, 2011
5. Rodrigues AF, Fraga MR, Vitral RW: Computed tomography evaluation of the temporomandibular joint in Class II Division 1 and Class III malocclusion patients: Condylar symmetry and condyle-fossa relationship. Am J Orthod Dentofacial Orthop 136:199, 2009
6. Stahl F, Baccetti T, Franchi L, et al: Longitudinal growth changes in untreated subjects with Class II Division 1 malocclusion. Am J Orthod Dentofacial Orthop 134:125, 2008
7. Nakata Y, Ueda HM, Kato M, et al: Changes in stomatognathic function induced by orthognathic surgery in patients with mandibular prognathism. J Oral Maxillofac Surg 65:444, 2007
8. Krisjane Z, Urtane I, Krumina G, et al: The prevalence of TMJ osteoarthritis in asymptomatic patients with dentofacial deformities: A cone-beam CT study. Int J Oral Maxillofac Surg 41:690, 2012