Surgery-first approach reduces the overall treatment time without damaging long-term stability in the skeletal class III correction: a preliminary study
박영욱, 권광준, 강예진, 장인산,
소속 상세정보
박영욱 ( Park Young-Wook ) - Gangneung-Wonju National University College of Dentistry Department of Oral and Maxillofacial Surgery
권광준 ( Kwon Kwang-Jun ) - Gangneung-Wonju National University College of Dentistry Department of Oral and Maxillofacial Surgery
강예진 ( Kang Yei-Jin ) - Gangneung-Wonju National University College of Dentistry Department of Oral and Maxillofacial Surgery
장인산 ( Jang In-San ) - Gangneung-Wonju National University College of Dentistry Department of Orthodontics
Abstract
Background: Compared to the conventional approach, including preoperative orthodontic preparation, the so-called surgery-first approach (SFA) seems to reduce the overall treatment time in the correction of skeletal class III dentofacial deformity. However, there have been controversies about postoperative skeletal stability with SFA. Therefore, we investigated the long-term stability and the overall treatment time after maxillomandibular surgery for skeletal class III correction with or without preoperative orthodontic preparation.
Methods: This retrospective study included eight patients who underwent maxillomandibular surgery for class III correction with the SFA (SFA group) and 20 patients who underwent the conventional approach (CA group). A comparative study of the change in the maxillary and mandibular position on preoperative (T1), 1-day (T2), 6-month (T3), and 2-year (T4) postoperative lateral cephalograms. We calculated the overall treatment time for each group.
Results: At the presurgical stage (T1), there was no bias in the skeletal features between the two groups. In the surgical change from T1 to T2, the mandible (point B) of the CA group was significantly moved superiorly. Short-term changes from T2 to T3 revealed that the mandible moved forward in both groups, whereas the maxillary position showed no significant changes. Long-term changes from T3 to T4 demonstrated that none of the measured parameters showed any significant differences. Finally, the average of overall treatment time was 15.1 months in the SFA group and 26.0 months in the CA group.
Conclusions: These findings suggest that SFA in bimaxillary orthognathic surgery for skeletal class III correction leads to predictable long-term skeletal stability, similar to surgery with CA. Furthermore, SFA reduced the overall treatment time compared to CA.
키워드
Skeletal class III correction; Surgery-first approach; Long-term skeletal stability; Overall treatment time
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