Oral Biol Res.  2021 Dec;45(4):165-173. 10.21851/obr.45.04.202112.165.

Outcomes of root resection therapy in maxillary molars: a 1－8 years retrospective study

• Choi JI
• Lim MS
• Lee HJ
• Kim YJ

• KMID: 2524710
• DOI: http://doi.org/10.21851/obr.45.04.202112.165

Abstract

Root resection is one of the methods for treating molars with furcation involvement. The maxillary molars usually have three roots, and therefore the risk of furcation involvement is higher. The purpose of this study was to examine the factors that necessitate root resection therapy in maxillary molars and to evaluate the factors that influence the prognosis after root resection therapy. In this retrospective study, 68 maxillary molars in 68 patients who had undergone root resection therapy from December 2008 to October 2015 at the Chonnam National University Dental Hospital, Department of Periodontology were examined. Of the 68 molars examined, 55 were maxillary first molars and 13 were maxillary second molars. Distobuccal (DB) roots were resected more frequently than mesiobuccal (MB) roots. Survival rates of maxillary molars were higher after MB root amputation than after DB root amputation, although the difference was not statistically significant. Of the maxillary molars, 12 (17.6%) failed. The most common reason for root resection in maxillary molars was periodontal diseases (42.7%). The maxillary molars whose roots were resected because of periodontal lesions had a lower failure rate than those resected because of nonperiodontal problems, such as endodontic problems, root fractures, and caries. The overall molar survival rate was 82.4% according to Kaplan–Meier survival estimates. For long-term molar survival after root resection therapy, appropriate case selection, correct operative procedures, and proper oral care after surgery are necessary.

Keyword

Furcation defects; Surgical procedures; Survival rate