Michael Raedel1, Heinz-Werner Priess2, Steffen Bohm3, Barbara Noack4, Yvonne Wagner5, Michael H Walter6. 1. Department of Prosthetic Dentistry, Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Fetscherstraße 74, 01307 Dresden, Germany. Electronic address: Michael.Raedel@uniklinikum-dresden.de. 2. AGENON, Gesellschaft für Forschung und Entwicklung im Gesundheitswesen, Kaunstraße 21, 14163 Berlin, Germany. Electronic address: priess@agenon.de. 3. AGENON, Gesellschaft für Forschung und Entwicklung im Gesundheitswesen, Kaunstraße 21, 14163 Berlin, Germany. Electronic address: bohm@agenon.de. 4. Department of Periodontology, Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Fetscherstraße 74, 01307 Dresden, Germany. Electronic address: Barbara.Noack@uniklinikum-dresden.de. 5. Department for Preventive and Pediatric Dentistry, University Hospital Jena, Bachstraße 18, 07740 Jena, Germany. Electronic address: Yvonne.Wagner@med.uni-jena.de. 6. Department of Prosthetic Dentistry, Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Fetscherstraße 74, 01307 Dresden, Germany. Electronic address: Michael.Walter@uniklinikum-dresden.de.
Abstract
OBJECTIVES: The aim of this study was to evaluate tooth loss after periodontal treatment. METHODS: The data was collected from the digital database of a major German national health insurance company. Periodontal treatment was the intervention in the treatment group. Kaplan-Meier survival analyses on the patient level with the primary outcome extraction were carried out over four years. A control group without treatment was matched and analysed. Differences were tested with the Log-Rank-test. Extraction incidences were calculated over a matched observation period six years before and four years after treatment for both treatment and control group. RESULTS: A total of 415,718 periodontal treatments could be traced. Focussing on the outcome "extraction", the cumulative four-year survival rate was 63.8% after periodontal treatment. The matched control group without periodontal treatment showed a survival rate of 72.5%. These differences were significant (p < 0.0001). The extraction incidence over time was higher in a four-year period after periodontal treatment compared to a six-year period before periodontal treatment. CONCLUSIONS: The outcome of periodontal treatment was acceptable. In about two thirds of the patients, extractions could be completely avoided within a four year period after treatment. CLINICAL SIGNIFICANCE STATEMENT: This study within the German national health insurance system shows that extractions were not observed after periodontal treatment in the majority of cases. Although periodontitis is a chronic disease, patients suffering from periodontitis have a considerable chance to prevent further tooth loss.
OBJECTIVES: The aim of this study was to evaluate tooth loss after periodontal treatment. METHODS: The data was collected from the digital database of a major German national health insurance company. Periodontal treatment was the intervention in the treatment group. Kaplan-Meier survival analyses on the patient level with the primary outcome extraction were carried out over four years. A control group without treatment was matched and analysed. Differences were tested with the Log-Rank-test. Extraction incidences were calculated over a matched observation period six years before and four years after treatment for both treatment and control group. RESULTS: A total of 415,718 periodontal treatments could be traced. Focussing on the outcome "extraction", the cumulative four-year survival rate was 63.8% after periodontal treatment. The matched control group without periodontal treatment showed a survival rate of 72.5%. These differences were significant (p < 0.0001). The extraction incidence over time was higher in a four-year period after periodontal treatment compared to a six-year period before periodontal treatment. CONCLUSIONS: The outcome of periodontal treatment was acceptable. In about two thirds of the patients, extractions could be completely avoided within a four year period after treatment. CLINICAL SIGNIFICANCE STATEMENT: This study within the German national health insurance system shows that extractions were not observed after periodontal treatment in the majority of cases. Although periodontitis is a chronic disease, patients suffering from periodontitis have a considerable chance to prevent further tooth loss.
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