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

Autor:	Soodeh Tahmasbi, Mahsa Jafarpour Boroujeni, Massoud Seifi, Reza Tabrizi
Rok vydání:	2020
Předmět:	Orthodontics Cephalometric analysis business.industry medicine.medical_treatment Orthognathic surgery Mandible Craniometry Skeletal class Spearman's rank correlation coefficient X-Y coordinate system Skeletal class III Maxilla Y-Coordinate Medicine Original Article business
Zdroj:	World Journal of Plastic Surgery
ISSN:	2252-0724 2228-7914
DOI:	10.29252/wjps.9.3.282
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::751b769573045fe501306703a59d9220 https://doi.org/10.29252/wjps.9.3.282 Zobrazit plný text záznamu