Periodontal Healing Distally to Second Mandibular Molar After Third Molar Coronectomy

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• 作者：Elisabetta Vignudelli ; DDS ; MSc^&lowast ; ; ^{elisabetta.vignudelli@unibo.it} ; Giuseppe Monaco ; DDS^&dagger ; ; Maria Rosaria Antonella Gatto ; MD ; PhD^&Dagger ; ; Simonetta Franco ; DDS ; MSc^§ ; ; Claudio Marchetti ; MD ; DDS^‖ ; Giuseppe Corinaldesi ; MD ; DDS^¶ ;
• 刊名：Journal of Oral and Maxillofacial Surgery
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：75
• 期：1
• 页码：21-27
• 全文大小：592 K
• 卷排序：75

文摘

Coronectomy of mandibular third molars is a procedure that still raises a number of questions. The aim of the present study was to answer one unsolved question: the periodontal healing distal to the mandibular second molar after third molar coronectomy.Materials and MethodsA prospective cohort study was performed of 30 patients treated at the Unit of Oral and Maxillofacial Surgery of the Department of Biomedical and Neuromotor Science of the University of Bologna. The predictor variables were the probing pocket depth (PPD), the distance between the marginal crest (MC) and the bottom of the osseous defect (BOD), and the distance between the cementum enamel junction (CEJ) and the BOD. These clinical indexes were recorded on 3 points of the distal surface of second molar: the distobuccal (DB), distomedial (DM), and distolingual (DL) sites. The other variables evaluated included root migration and postoperative complications. The Wilcoxon test for paired data and Kendall's tau-b correlation coefficient was used to evaluate all variables. The significance level was set at P = .05.ResultsThe cohort was composed of 30 patients with 34 high-risk mandibular third molars (9 men and 21 women), with a mean age of 28 ± 7 years. At 9 months, a statistically significant reduction in the PPD of 2 ± 3, 1 ± 2, and 2 ± 2 mm and a statistically significant reduction in the MC-BOD distance of 4 ± 4, 4 ± 4, and 4 ± 5 mm for the DB, DM, and DL sites, respectively, was observed (P = .001). Also, the intraoperative CEJ-BOD distance showed a statistically significant reduction for the DB, DM, and DL sites.ConclusionsAfter coronectomy, restoration of a clinical healthy periodontium distal to the second molar was observed. However, further studies are necessary to confirm these preliminary clinical results and to compare periodontal healing between coronectomy and complete extraction.