NDLI: Characteristics and corrective outcome of face asymmetry by orthognathic surgery.

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Characteristics and corrective outcome of face asymmetry by orthognathic surgery.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Ko, Ellen Wen-Ching Huang, Chiung Shing Chen, Yu Ray
Description	Country affiliation: Taiwan Author Affiliation: Ko EW ( Graduate Institute of Craniofacial and Oral Science, Chang Gung University, Chang Gung Memorial Hospital, Taipei, Taiwan. ellenko@seed.net.tw)
Abstract	PURPOSE: This study was conducted to identify the characteristics of facial asymmetry before surgery and to evaluate the facial skeletal changes and stability after 2-jaw orthognathic surgery. The ideal 'double-cross grid' as fitting the key landmarks to the reference planes on posteroanterior cephalograms was set as the treatment goal. PATIENTS AND METHODS: Twenty-seven adult patients, 18 female and 9 male subjects, were evaluated before and after surgery and at completion of orthodontic treatment. Cephalometric measurements of posteroanterior and lateral cephalograms were obtained at 3 timings. Measurements of frontal facial photographs were recorded before and after treatment. Data from each time set were compared to evaluate surgical achievement and postsurgical stability. RESULTS: All patients had original malocclusion of Class III in at least 1 side of the dentition except 1 patient. Total treatment duration was 15 +/- 3.5 months on average. Laterality of the patients demonstrated left-side dominance in 18 patients and right-side dominance in 9 patients. After surgery, face symmetry was improved by correction of the occlusal plane cant, incisal dental axis, and chin deviation. Symmetry of bilateral gonial width was also improved significantly with good stability. Intergonial width was reduced by 3.4 mm during treatment. Soft tissue presented similar correction by leveling oral commissures and correcting chin deviation. The maxilla was moved forward 1.25 mm and upward 1.20 mm, and the mandible was setback 4.3 mm and upward 1.5 mm as measured from lateral cephalograms. All sagittal changes remained stable after surgery. CONCLUSION: Fitting skeletal landmarks into a double-cross grid on posteroanterior cephalogram is an attainable guide and goal for 2-jaw orthognathic correction of facial asymmetry. Symmetry was achieved and facial profile was improved after surgery and remained stable afterward. The decrease of intergonial width indicated considerable remodeling of the bilateral gonial angle after surgery.
File Format	HTM / HTML
ISSN	02782391
Issue Number	10
Volume Number	67
e-ISSN	15315053
Journal	Journal of Oral and Maxillofacial Surgery
Language	English
Publisher	Elsevier
Publisher Date	2009-10-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Medicine__semicolon__otorhinolaryngology__semicolon__surgery Cephalometry Methods Facial Asymmetry Surgery Malocclusion, Angle Class Iii Adolescent Adult Chin Pathology Face Female Follow-up Studies Humans Incisor Lip Male Mandible Maxilla Molar Orthodontics, Corrective Osteotomy Osteotomy, Le Fort Patient Care Planning Photography Retrospective Studies Treatment Outcome Vertical Dimension Young Adult Comparative Study Journal Article
Content Type	Text
Resource Type	Article
Subject	Oral Surgery Otorhinolaryngology Surgery

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