Soft Tissue Profile Changes After Bilateral Sagittal Split Osteotomy for Mandibular Setback: A Systematic Review

Joss, Christof Urs; Joss-Vassalli, Isabella Maria; Bergé, Stefaan; Kuijpers-Jagtman, Anne Marie

doi:10.1016/j.joms.2010.04.020

Cited by 47 publications

(31 citation statements)

References 35 publications

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“…All analyses associated with the morphological and therapeutic study of alterations of the facial skeleton must focus on soft tissues, since this is the area where the facial changes and modifications of a certain treatment will be seen (Joss et al, 2010). Therefore, establishing the real fields of analysis from among the different anomalies could suggest treatment orientations for planning facial modification surgeries.…”

Section: Introductionmentioning

confidence: 99%

Facial Soft Tissue in Subjects with Class II and Class III Facial Deformities: Preliminary Results

et al. 2014

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SUMMARY:Class II and class III skeletal anomalies require treatments that are both esthetic and functional, so the purpose of this investigation was to study the relationship between facial soft and hard tissues of patients with class II and class III deformities in the lower third of the face. A descriptive study was designed which included class II subjects with a SNB angle less than 78º and class III with a SNA angle less than 80º. The soft tissue width was analyzed in relation to the Pg point, A point, B point, and upper and lower incisor cervical points. The naso-labial angle and interincisal angle were also analyzed. The studies were done using cone beam computerized tomography and analyzed with the software Simplant O&O (Materialise, Belgium). The results revealed similarities in the measurements of the facial width soft tissues with differences of less 1 mm in the Pg point, A point, B point, upper incisor point; the greatest differences were observed between the two groups in thelower incisor cervical point, with almost 5 mm difference in tissue size. The naso-labial angle also presented differences between the two groups, being more closed in the class III than in the class II subjects (approximate difference of 6º). It can be concluded that there are minimal differences in the soft tissue width in class II and class III subjects; other parameters can be analyzed to search for differences that influence treatment planning and strategies for these patients.

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Section: Introductionmentioning

confidence: 99%

Facial Soft Tissue in Subjects with Class II and Class III Facial Deformities: Preliminary Results

et al. 2014

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“…This finding would imply (and actually confirm the clinical observations) that a greater mandibular setback increases the risk of creating a double-chin profile. 20,21 In fact, 19 (76%) of the 25 Class III patients had a maxillary LeFort I osteotomy rather than a mandibular setback or a combination of both because the chin-throat zone was not favorable for the setback, even in patients in whom cephalometric measurements indicated mandibular prognathism in conjunction with maxillary retrognathism.…”

Section: Clinical Significance and Implicationsmentioning

confidence: 99%

Chin-throat anatomy: Normal relations and changes following orthognathic surgery and growth modification

Haddad

Ghafari

2017

The Angle Orthodontist

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Objectives: To determine if a new facial line (T), tangent to the throat, intersects the mandibular border in anterior (ANT) and posterior (POST) parts in proportions varying with facial configuration, and to evaluate the association between chin projection and throat inclination and the potential for the T-line to reflect this association. Materials and Methods: Measurements on profile photographs and cephalograms of 135 adults (aged 18-50 years)-45 each of Class I, II, and III (CI, CII, CIII) malocclusions-included ANT and POST, chin-throat (CTA), and mento-cervical (MCA) angles. Pre-and posttreatment measurements were compared in two subgroups (n ¼ 25 each) of CII and CIII orthognathic surgery patients and in CII, division 1 early-treatment patients (n ¼ 63). Statistics included analysis of variance and ttest for group differences, and Pearson correlation for associations among variables. Results: ANT was nearly equal to POST in CI (50.99%) and CIII (51.86%) subjects and shorter in CII (36.01%) subjects. CTA and MCA were greater in CII profiles and smaller in CIII profiles. Significant differences (P , .0001) were observed for ANT, POST, CTA, and MCA between Classes I/II and II/III and for MCA between Classes II/III (P ¼ .016). High correlations were noted between ANT and CTA in Classes I (r ¼À0.83), II (r ¼À0.73), and III (r ¼À0.68). In surgically treated patients, posttreatment measurements approached CI values. In the early-treatment group, ANT increased but remained smaller than POST; CTA decreased by nearly 13%. Conclusions: Chin-throat relations and chin extension are associated and require routine assessment in terms of diagnosis and treatment outcome. A practical tool to assess chin-throat relationship, the T-line bisects the mandibular body nearly equally in Class I faces. (Angle Orthod. 2017;87:696-702.)

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“…In this study we tried to answer some questions raised by Joss et al 3 These authors conducted a metaanalysis of research that investigated the behavior of soft tissues, but they did not determine how changes of soft tissues after surgery depend on the thickness of the tissue before it. Correlation analysis showed a strong negative correlation between the thickness of soft tissues before surgery and changes in soft tissue.…”

Section: Soft-tissue Changes After Orthognatic Surgerymentioning

confidence: 99%

“…Joss et al 3 cited a problem regarding orthodontic brackets in the evaluation of changes in the thickness of soft tissue. We divided patients into two groups based on whether they had brackets on cephalograms.…”

Section: Soft-tissue Changes After Orthognatic Surgerymentioning

confidence: 99%

“…Many studies have attempted to predict the behavior of soft tissues after surgery. A meta-analysis conducted by Joss et al 3 showed that only eight papers could be included in the analysis and that others had many shortcomings. The purpose of our research was to correct some deficiencies indicated by Joss et al and thus contribute to more accurate conclusions.…”

Section: Introductionmentioning

confidence: 99%

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Soft tissue changes after mandibular setback and bimaxillary surgery in Class III patients

Jokić

Uglešić

Macan

et al. 2013

The Angle Orthodontist

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Objective: To evaluate the relationship between soft tissue and bone structure for Class III patients before and after bilateral sagittal split osteotomy (BSSO) and bimaxillary orthognathic surgery; to determine the impact of other factors on soft tissue change; and to evaluate correlations between thickness of tissue before surgery, SNA, SNB, and ANB angles, and soft tissue changes. Materials and Methods: The study included 78 Class III patients treated only with BSSO or with BSSO and Le Fort I osteotomy. Lateral cephalograms were taken before and 3 months to 1 year after surgery. After all points of the Zagreb82 and Legan and Burstone profile analysis were traced, the ratio of five soft tissue points before and after surgery was evaluated. Results: Soft tissue between points Sn and A and upper lip showed statistically significant changes for patients treated with bimaxillary surgery and BSSO. Only gender had an influence on soft tissue change. The correlation between soft tissue thickness and changes after surgery was significant. A change in SNB angle correlated with upper lip thickness for patients treated with BSSO but not for patients treated with BSSO and Le Fort I. SNA angle changes correlated with soft tissue changes between points Sn and A. Conclusion: Results of this study show soft tissue changes after BSSO and BSSO and Le Fort I and eliminate the deficiencies that were indicated in the meta-analysis of soft tissue changes from a previous study. (Angle Orthod. 2013;83:817-823.)

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Soft Tissue Profile Changes After Bilateral Sagittal Split Osteotomy for Mandibular Setback: A Systematic Review

Cited by 47 publications

References 35 publications

Facial Soft Tissue in Subjects with Class II and Class III Facial Deformities: Preliminary Results

Facial Soft Tissue in Subjects with Class II and Class III Facial Deformities: Preliminary Results

Chin-throat anatomy: Normal relations and changes following orthognathic surgery and growth modification

Soft tissue changes after mandibular setback and bimaxillary surgery in Class III patients

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