Photos and Silhouettes in Evaluating the Need for BSSO Surgery in Adult Females

Introduction: The objective of this study was to determine the anterior/posterior position of the mandible at which an orthodontist and oral surgeon would advise bilateral sagittal split osteotomy advancement or set back when evaluating adult female photos and silhouettes. Material & Methods: Fifty-one adult female profile photos and lateral cephalograms were collected. Subjects were selected who met three criteria: 1) ANB of 0-2, 2) balanced profile image, and 3) age greater than 18. The image and cephalometric tracing were morphed together to allow software simulation of mandibular prognathia and retrognathia in 2 mm increments. Orthodontists and oral surgeons evaluated morphed photos and silhouettes to find the profile break point at which BSSO surgery would be recommended. Both prognathic and retrognathic profile break points were evaluated. A two group repeated measures ANOVA test was used to determine a group effect. Results: The two group repeated measures ANOVA test found a statistically significant difference between orthodontists and oral surgeons when evaluating class II and class III profiles for surgery (P = 0.000). There was a statistically significant difference between photos and silhouettes when evaluating class III profiles (P = 0.014), but not when evaluating class II profiles (P = 0.213). Conclusions: Oral surgeons and orthodontists do not recommend surgery for the same level of jaw discrepancy when they use photos and silhouettes. Oral surgeons recommended BSSO surgery at a lesser degree of retrognathia. Orthodontists recommended surgery at a lesser degree of prognathia. Photos and silhouettes were evaluated differently for patients with prognathic mandibles

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Orthodontics and Dentofacial Orthopedics

Year

2013

Author dc:creator

• Moretz, Jessicah L.

Contributors dc:contributor

• Leggitt, V. Leroy
• Andreiko, Craig
• Neufeld, Roland

• Orthodontics and Orthodontology
• Other Dentistry
• Maxillofacial Abnormalaties - surgery; Malocclusion - surgery; Oral Surgical Procedures; Facial Bones - Surgery; Esthetics, Dental; Surgery - Aethetic aspects; Orthognathic Surgery
• Orthognathic surgery
• Facial attractiveness
• Bilateral Sagittal split Osteotomy

Statement dc:rights

• This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.

Language dc:language

English

Repository record dc:identifier

https://scholarsrepository.llu.edu/etd/138

OAI identifier oai:identifier

oai:scholarsrepository.llu.edu:etd-1137