Retention of molars after root-resective therapy: a retrospective evaluation of up to 30 years
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Long-term retention of teeth and especially molars in function is the ultimate goal of periodontal therapy. Root-resective therapy is a treatment option for molars with advanced furcation involvement, which has been questioned because of the heterogenous success rates published in literature. This study aimed to evaluate long-term results of root-resective treatment over a period of up to 30 years.
In this retrospective cohort, 90 root-resected molars in 69 patients were examined for 4–30 years (14.7 ± 6.8 years). The complete treatment sequence was performed by one of the authors in a general dental practice.
Overall cumulative survival rate was 90.6% after 10 years, but then decreased considerably. Molars after root resection had a median survival time of 20 years. The incidence of endodontic complications leading to tooth extraction was only 26.7%, 50% were lost due to periodontal problems, and 16.7% because of caries. Mandibular molars had a significantly lower relative risk of loss than molars in the maxilla (HR 0.31, 95% CI 0.1–0.91, p = 0.033). Mandibular molars showed a survival probability of almost 80% even 20 years after root resection.
Root-resective therapy is a predictable treatment option, when care is administered at each phase of therapy.
This study provides important information about what is possible in daily practice under the outlines of public health care, when care is administered at each phase of resective therapy.
KeywordsResective therapy Tooth loss Tooth survival Tooth retention Molar Long-term results
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
For this type of study formal consent was not required.
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