A method of recording change in maxillary position following orthognathic surgery

Houston, W. J. B.; Jones, Elizabeth; James, David

doi:10.1093/ejo/9.1.9

Cited by 34 publications

(5 citation statements)

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“…In this study, cephalometric radiographs were used to assess the amount of postoperative bone loss at the augmentation sites. It has been shown that errors in cephalometric measurements are very small when using a superimposition technique (Houston et al, 1978;Rondhal et al, 1988). In this study, the contours of the basal bone and of the fragment were well defined, hence, it was possible to superimpose the tracings of the mandible precisely.…”

Section: Discussionmentioning

confidence: 70%

Use of the sandwich osteotomy plus an interpositional allograft for vertical augmentation of the alveolar ridge

Choi

Lee²,

Huh

et al. 2004

Journal of Cranio-Maxillofacial Surgery

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Section: Discussionmentioning

confidence: 70%

Use of the sandwich osteotomy plus an interpositional allograft for vertical augmentation of the alveolar ridge

Choi

Lee²,

Huh

et al. 2004

Journal of Cranio-Maxillofacial Surgery

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“…Houston et al . [21] have reported that the maxillary bony landmarks are being destroyed during surgery particularly ANS with Le Fort I surgery and this is likely to reduce the soft to hard tissue ratio and influence the correlation horizontally and vertically. We therefore used point A in the maxilla and point B in the mandible as a cephalometric reference points for measuring the amount of maxillary advancement and mandibular setback.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies on single-jaw and bimaxillary surgery have explained the weaker soft tissue response to be related to the variability in soft tissue thickness, degree of deformity, and tonicity of the musculature, variability in the amount of anterior nasal spine resection, and maxillary bony landmarks being destroyed during surgery. [2021] This is likely to reduce the soft to hard tissue ratio and influence the correlation horizontally and perhaps vertically. Vertically, the maxillary and mandibular soft tissue responses showed weak correlation to hard tissue.…”

Section: Discussionmentioning

confidence: 99%

Soft and hard tissue changes after bimaxillary surgery in Japanese class III asymmetric patients

et al. 2012

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Objectives:To assess the effects of bimaxillary surgery on Class III subjects with mandibular asymmetry, and to compare the effects of the type of surgery performed in the mandible on the facial profile especially in the presence of facial asymmetry.Materials and Methods:Thirty-six patients in whom imbalance between the maxilla and the mandible were corrected by Le Fort I osteotomy combined with bilateral intraoral vertical ramus osteotomy (BIVRO group, n=9), bilateral sagittal split ramus osteotomy (BSSRO group, n=14), or a combination of intraoral vertical ramus osteotomy (IVRO) and sagittal split ramus osteotomy (SSRO) (IVRO + SSRO group, n=13). Cephalograms were taken before surgery (T1), and 1 year after surgery (T2). Hard and soft-tissue changes were compared.Results:The postsurgical findings showed that greater mandibular backward displacement and greater upper lip forward movement were more pronounced among BIVRO group when compared with BSSRO group. Upper lip relation to E-line showed greater improvement in BIVRO group than BSSRO and IVRO + SSRO groups. The ratios of corresponding mandibular soft to hard tissue movements were higher than that of maxillary movements and were more pronounced in IVRO + SSRO and BSSRO groups when compared with BIVRO group.Conclusion:IVRO surgical technique appears to be more effective in positioning the mandible more posteriorly and improving upper and lower lips position and competence.

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“…The evaluation of change in maxillary position after orthognathic surgery and the extent of subsequent relapse is complicated by the fact that conventional cephalometric landmarks on the maxilla are usually affected by the procedure (10). In this study the problem was encountered with the signi cant change in the distance ANS-PM preoperatively and postoperatively, as the anterior nasal spine is often altered during the operation.…”

Section: Discussionmentioning

confidence: 95%

Skeletal Stability of Le Fort I Osteotomy in Patients With Unilateral Cleft Lip and Palate

Heliövaara

Ranta²,

Hukki³

et al. 2001

Scandinavian Journal of Plastic and Reconstructive Surgery and

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The skeletal stability of Le Fort I osteotomy was evaluated cephalometrically in 40 consecutive patients with unilateral cleft lip and palate (UCLP) (27 male and 13 female) who were operated on between 1987-1995. Their mean age at the time of operation was 23.7 years (range 16.3-40.4). The one-piece Le Fort I osteotomy was fixed with titanium plates and the osteotomy line was bone-grafted. Neither intermaxillary fixation nor occlusal splints were used postoperatively. Skeletal stability was analysed both horizontally and vertically on cephalograms taken shortly before operation, immediately afterwards, and at six months and at one year postoperatively. The mean maxillary advancement (point A) during the Le Fort I was 3.9 mm (range 0-8.9) and mean vertical lengthening 4.5 mm (range -0.6-10.5). One year postoperatively the mean maxillary horizontal relapse was 20.5% (0.8 mm, range 0-3.7) whereas the mean vertical relapse was 22.2% (1 mm, range 0-5.7). The vertical relapse reduced from 38% to 8.3% between 1987 and 1995, and there was a positive correlation between the amount of maxillary advancement and relapse both horizontally and vertically.

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A method of recording change in maxillary position following orthognathic surgery

Cited by 34 publications

References 0 publications

Use of the sandwich osteotomy plus an interpositional allograft for vertical augmentation of the alveolar ridge

Use of the sandwich osteotomy plus an interpositional allograft for vertical augmentation of the alveolar ridge

Soft and hard tissue changes after bimaxillary surgery in Japanese class III asymmetric patients

Skeletal Stability of Le Fort I Osteotomy in Patients With Unilateral Cleft Lip and Palate

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