Skeletal relapse after mandibular setback in skeletal class III with high mandibular plane angle patients

Imerb, Napatsorn; Supanchart, Chayarop; Sriyaranya, Nutchada; Apisariyakul, Janya; Mahasanatipiya, P.; Sastraruji, Thanapat

doi:10.1016/j.ijom.2015.08.138

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“…17 Furthermore, Imerb et al stated that a high mandibular plane angle had less stability than a normal mandibular plane angle. 21 However, there were benefits in performing dental decompensation before surgery using the conventional approach. 22,23 From our finding that the lower incisors proclined after decompensation and retroclined after the postsurgical period, round-tripping tooth movement was observed, which was considered an adverse effect.…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients

et al. 2022

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Objective Bilateral sagittal split osteotomy (BSSO) is a standard mandibular setback procedure for skeletal class III patients. Our center has been using NM-Low Z plasty, a BSSO modification, since 2016. The study's objective was to evaluate skeletal changes in 38 skeletal class III patients following mandibular setback surgery using NM-Low Z plasty. With Dolphin Imaging software, three lateral cephalograms were traced and digitized: T0, T1, and T2. The distance between the B-point and the SN7 perpendicular line defined immediate changes after surgery (T1-T0) and stability after surgery (T2-T1). The reliability test included 6 cephalograms retraced after 2-week interval. At point B, the principal result was horizontal movement forward. Statistical Analysis The analysis used paired t-tests. Results The mean mandibular setback was 9.78 mm, and the mean skeletal relapse was 2.61 mm, or 26.69%. Statistical analysis showed postoperative differences (p < 0.05). Vertical measurement in B-SN7 reduced immediately and postoperatively. Conclusion Postoperatively, the mandible relapsed significantly forward and upward. Rotational relapse is a concern with NM-Low Z plasty in hypo-/normodivergent patients.

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Section: Discussionmentioning

confidence: 99%

“… 17 Furthermore, Imerb et al stated that a high mandibular plane angle had less stability than a normal mandibular plane angle. 21 …”

Section: Discussionmentioning

confidence: 99%

Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients

et al. 2022

View full text Add to dashboard Cite

show abstract

Skeletal relapse after mandibular setback in skeletal class III with high mandibular plane angle patients

Cited by 1 publication

References 0 publications

Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients

Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients

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