Correlation between intraoperative proximal segment rotation and post-sagittal split ramus osteotomy relapse: a three-dimensional cone beam computed tomography study

Choi, Byung‐Joon; Lee, B.-S.; Kwon, Yong‐Dae; Lee, J.-W.; Yun, Sun-Ung; Ryu, Kyung-Nam; Ohe, Joo-Young

doi:10.1016/j.ijom.2017.10.014

Cited by 12 publications

(11 citation statements)

References 30 publications

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“…These are to be expected after skeletofacial surgery, but these clinical repercussions should always be attenuated by surgical maneuvers and postoperative care 37,46,47 . Other TMJ-related concerns were uncommon in our cohort, supporting a former report 21 . While the patient-centered outcome of the presence of TMJ-related symptoms and signs is a useful and relevant outcome measure 21,37,46,47 , further studies may expand the current findings by inclusion of objective evaluations.…”

Section: Discussionsupporting

confidence: 92%

“…Other TMJ-related concerns were uncommon in our cohort, supporting a former report 21 . While the patient-centered outcome of the presence of TMJ-related symptoms and signs is a useful and relevant outcome measure 21,37,46,47 , further studies may expand the current findings by inclusion of objective evaluations.…”

Section: Discussionsupporting

confidence: 92%

“…It is controversial whether the pitch clockwise rotation of the proximal ramus segment could increase the relapse in BSSO-based mandibular setback, with positive 41,42 and negative 21,43 correlations being reported. Appraising pitch rotation of the proximal segment using a condyle-based sagittal view method, another group reported a significantly decreased angle (counterclockwise rotation) with a mean of 2.32° after BSSO mandibular setback 2 .…”

Section: Discussionmentioning

confidence: 99%

“…In this setting, the postoperative changes of the proximal ramus segment have been only sparsely investigated in patients with no evident facial asymmetry by using two-dimensional image-based measurement methods. Limited reports of the condylar head movement in a linear direction (≤1 mm) with some extent of rotation have previously been described 14,16–21 . It was also shown that the condylar angle changes in all three rotational planes after skeletofacial surgery 17,22–26 , indirectly indicating that the position of the proximal ramus segment was altered, and rotation had occurred.…”

Section: Introductionmentioning

confidence: 99%

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The outcome of skeletofacial reconstruction with mandibular rotation for management of asymmetric skeletal class III deformity: A three-dimensional computer-assisted investigation

Denadai

Lin

et al. 2019

Sci Rep

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The mandibular proximal ramus segments should be moved and rotated during orthognathic surgery-based skeletofacial reconstruction for the correction of challenging patients with facial asymmetry and malocclusion, but quantitative data regarding this rotation were not sufficient to date. This 3D computer-assisted study measured the proximal ramus segment rotation after 3D simulation-guided two-jaw surgery in patients with facial asymmetric deformity and class III malocclusion (n = 31). Using 3D mandible models and a reliable proximal ramus segment-related plane, angular changes in pitch, roll and yaw directions were measured before and one month after surgery. Significant rotational changes (p < 0.01) were observed in the left and right sides and overall proximal ramus segments after surgery, with absolute differences of 4.1 ± 3.0 (range −7.8 to 6.9), 2.8 ± 2.3 (−8.8 to 5.0), and 2.7 ± 2.4 (−6.6 to 9.9) degrees in pitch, roll, and yaw rotations, respectively. Numbness and mouth opening limiting occurred within the first 6 months after surgery but the patients had an unremarkable long-term postoperative course, with no revisionary surgery required. This study contributes to the multidisciplinary-related literature by revealing that proximal ramus segment rotation and rigid fixation with no postoperative intermaxillary immobilization was practicable in skeletofacial surgery for the successful treatment of asymmetric deformity and class III malocclusion.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The outcome of skeletofacial reconstruction with mandibular rotation for management of asymmetric skeletal class III deformity: A three-dimensional computer-assisted investigation

Denadai

Lin

et al. 2019

Sci Rep

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“…Proximal segment has muscle attachments and soft tissue envelope. Even if the muscles are detached, the soft tissue envelope with retromandibular soft tissues and the petrygomasseteric sling as well as the important ligaments attached to the proximal segment will influence the position of the proximal segment, so the question is: will the mandible remain in a stable planned position if we return the proximal segment to unchanged preoperative position 10 ? The answer is: in my practice, yes.…”

mentioning

confidence: 99%