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Periodontal consequences of mandibular incisor proclination during presurgical orthodontic treatment in Class III malocclusion patients

 Yoon Jeong Choi  ;  Chooryung J. Chung  ;  Kyung-Ho Kim 
 ANGLE ORTHODONTIST, Vol.85(3) : 427-433, 2015 
Journal Title
Issue Date
Adolescent ; Adult ; Alveolar Bone Loss/etiology ; Alveolar Process/diagnostic imaging ; Alveolar Process/pathology ; Cephalometry/methods ; Female ; Follow-Up Studies ; Gingival Recession/etiology ; Humans ; Incisor/pathology* ; Male ; Malocclusion, Angle Class III/surgery ; Malocclusion, Angle Class III/therapy* ; Mandible/pathology* ; Orthognathic Surgical Procedures/methods ; Periodontium/pathology* ; Preoperative Care ; Radiography, Bitewing ; Retrospective Studies ; Tooth Cervix/pathology ; Tooth Crown/pathology ; Young Adult
Class III malocclusion ; Mandibular incisor proclination ; Orthodontic treatment ; Periodontal tissue change
OBJECTIVE: To test the hypothesis that periodontal changes are similar between proclined and minimal-changed mandibular incisor position groups during presurgical orthodontic treatment for Class III orthognathic surgery. MATERIALS AND METHODS: The following measurements were performed before and after presurgical orthodontic treatment of 75 patients (proclination group, 39 subjects; minimal-change group, 36 subjects): clinical crown length, sulcus and bone probing depths, and width of attached gingiva from clinical examination; infradentale-to-MP (perpendicular distance of infradentale to mandibular plane) from examination of lateral cephalograms; and the distance between the cementoenamel junction and alveolar crest from examination of periapical radiographs. Data were compared between the two groups, and a regression analysis was performed to investigate factors affecting the periodontal changes. RESULTS: In both groups, clinical crown length and bone probing depth increased during presurgical orthodontics (P < .05). Infradentale-to-MP and the width of attached gingiva decreased more in the proclination group than in the minimal-change group (P < .05). Proclination and protrusion of the mandibular incisors, and treatment duration affected the periodontal changes. CONCLUSIONS: The null hypothesis was rejected. Proclination of the mandibular incisors for decompensation in Class III surgery patients seems to result in labial alveolar bone recession and a decrease in width of attached gingiva. However, the amount of the periodontal recession appeared to be clinically insignificant.
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2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyung Ho(김경호) ORCID logo https://orcid.org/0000-0002-8154-2041
Chung, Chooryung J.(정주령) ORCID logo https://orcid.org/0000-0001-9399-7193
Choi, Yoon Jeong(최윤정) ORCID logo https://orcid.org/0000-0003-0781-8836
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