7 The Surgical Approach to Class III Malocclusions

Byrd, D.Lamar; Murphey, Phelps J.

doi:10.14219/jada.archive.1971.0154

Cited by 3 publications

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Section: Introductionmentioning

confidence: 99%

“…Although planning is very important in treatment, the added advantage of 3D images is that it allows the specialist to perform the failure analysis, which is essentially the same trial and error. 2 Numerous studies have shown that twodimensional radiographs to be obtained from CBCT scans. Two-dimensional images of 3D structures can accelerate the diagnosis and cephalometric analysis is one of the important steps in the diagnosis and treatment of patients with acute skeletal malocclusion.…”

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Association between Lateral Cephalometric Changes in X-Y Coordinate System and Profile Changes among Skeletal Class III Patients after Orthognathic Surgery

Seifi

Boroujeni

Tahmasbi

2020

wjps

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BACKGROUND Since aesthetic issues are the most important causes of referring skeletal class III patients to surgeons, investigating the impact of orthognathic surgeries on improving patient profiles increases the quality of treatment and quality of life. METHODS In a retrospective observational-analytical study, 25 patients older than 18 years with class III skeletal malocclusion who had gone under both orthodontic and double-jaw orthognathic treatment were enrolled. Cephalometric imaging interval was before and at least 6 months after surgery. By defining a number of points and coordinate axes (X-Y), a criterion for comparing hard and soft tissue changes was obtained. These measurements were coordinated, linear and angular. The quantitative data were compared with data obtained using the Likert Scale Questionnaire by means of electronic “Google Forms” that was completed by orthodontists (n=5) and maxillofacial surgeons (n=5) to rank improvement in post-surgical profiles for both cephalometry and photography from poor to pleasant. Spearman Correlation Analysis was conducted between the quantitative and qualitative data. RESULTS Vertical changes of point B and horizontal changes of point PNS showed correlation with improvement of patient profile. Changes in N-Pog line (R=-0.4), mandibular plane angle (R=-0.4) and nasolabial angle (NLA) (R=0.38) were significantly correlated with improvement of profiles. CONCLUSION In orthognathic double-jaw surgery on patients with skeletal Class III, forward movement of maxilla, upward positioning of mandible (decreasing anterior facial height), decreasing mandibular plane angle and increasing nasolabial angle would result in a better profile.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Association between Lateral Cephalometric Changes in X-Y Coordinate System and Profile Changes among Skeletal Class III Patients after Orthognathic Surgery

Seifi

Boroujeni

Tahmasbi

2020

wjps

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Orthodontic treatment during intermaxillary immobilization period following surgical correction of prognathism

Elias¹,

Telsey²,

Stern³

1974

Oral Surgery, Oral Medicine, Oral Pathology

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Orthognathic Cephalometric Norms for a Sample of Sudanese Adults

Gilada

Abuaffan

Hamid

2021

Journal of Head &Amp; Neck Physicians and Surgeons

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Background: With the recent global increase in the number of adult patients seeking orthodontic treatment in general and orthognathic surgery in specific, the need for population-specific cephalometric norms emerges. This is essential in diagnosing and formulating more optimum treatment plans. Aim: To establish orthognathic cephalometric standard values for an sample of Sudanese Adults. Design: Cross-sectional observational analytical study. Materials and Methods: A total of 106 cephalometric radiographs of Sudanese adults aged between 17 and 25 years (48 males and 58 females) were digitally traced and analyzed using Burstone's Cephalometric for Orthognathic Surgery analysis (COGS). Statistical Analysis: Descriptive statistics, means, and standard deviations were used to present Sudanese standard values. Paired sample t-test was used to test for significant differences between Sudanese and Caucasian norms. Results: When compared to European–Americans, Sudanese adults, in general, had a shorter cranial base, lower values of some vertical height measurements, shorter maxillae, and larger mandibular plane angle. In addition, Sudanese females had a more convex profile and more protrusive maxillae in comparison to their European–Americans counterparts. Regarding dental measurements, Sudanese males had statistically significant lower values of upper and lower anterior and posterior dental heights, steeper occlusal plane, and more proclined incisors. Moreover, Sudanese females had steeper occlusal plane as well as more proclination of the anterior teeth when compared to their European–American counterparts. Conclusions: Considerable differences in skeletal and dental configuration exist between Sudanese and European-American adults. These variations must be considered during treatment planning. This study can provide a useful database for orthognathic surgery treatment planning for Sudanese adults.

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7 The Surgical Approach to Class III Malocclusions

Cited by 3 publications

References 1 publication

Association between Lateral Cephalometric Changes in X-Y Coordinate System and Profile Changes among Skeletal Class III Patients after Orthognathic Surgery

Association between Lateral Cephalometric Changes in X-Y Coordinate System and Profile Changes among Skeletal Class III Patients after Orthognathic Surgery

Orthodontic treatment during intermaxillary immobilization period following surgical correction of prognathism

Orthognathic Cephalometric Norms for a Sample of Sudanese Adults

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