Journal of Korean Dental Science

Korean Academy of Dental Science (대한치의학회)
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Correlation between Unfavorable Split in the Distal Segment during the Bilateral Sagittal Ramus Osteotomy and Skeletal Relapse: Cone-Beam Computed Tomography Study

  • Kim, Young-Hoon (Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University) ;
  • Lee, Baeksoo (Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University) ;
  • Kwon, Yong-Dae (Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University) ;
  • Ohe, Joo-Young (Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University) ;
  • Lee, Jung-Woo (Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University) ;
  • Jung, Junho (Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University) ;
  • Lee, Seok Mo (Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University) ;
  • Choi, Byung-Joon (Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University)
  • Received : 2021.08.24
  • Accepted : 2021.11.17
  • Published : 2021.12.30
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Abstract

Purpose: The purpose of this article is to study the relationship of unintentionally extended split in the distal segment during the bilateral sagittal split ramus osteotomy (BSSRO) and skeletal relapse. Materials and Methods: Twenty patients with mandibular prognathism were divided into two groups according to whether or not unintentionally extended split had occurred. Cone-beam computed tomography images were taken before surgery (T0), immediately after surgery (T1), and postoperatively at 6 months (T2). The stability was evaluated by measuring the change of Nasion perpendicular-Pogonion (N-Pog) distance. Result: Both groups showed mild advancement of Pog during follow-up. In both groups, the condyle head rotated inward and moved posterioinferiorly after surgery, but tended to return to their original position during follow-up. Conclusion: There was no statistically significant difference between the two groups in mandible position. Moreover, the condylar position was stable. If it is difficult to proceed reduction of the unintentionally extended split, careful inspection should be performed to prevent subsequent complications during follow-up.

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References

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