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Using Periodontal Staging and Grading System as a Prognostic Factor for Future Tooth Loss: A Long-Term Retrospective Study.
Journal of Periodontology 2019 September 10
BACKGROUND: A new classification of periodontal diseases aimed to identify periodontal disease based on a multidimensional staging and grading system has been recently proposed. However, up to date, its prognostic predictive capability has not been investigated. The aim of this study was to assess if parameters included in the new classification were predictive of tooth loss after a long-term follow-up (> 10 years) in patients with periodontitis.
METHODS: Patients presented with periodontitis at the University of Michigan between January 1996 and January 2004 were screened and categorized according to the new classification of periodontitis. Number/Reasons of teeth loss in patients who underwent at least one session/year of maintenance during the entire follow-up period were extracted and utilized to analyze the prognostic capabilities of variables (Staging, Grading and Extent) included in the new classification.
RESULTS: A total number of 292 patients with a mean follow-up of 289.7 ± 79.6 months were included. 31 (10.6%) patients were classified as Stage 1, 85 (29.1%) as Stage 2, 146 (50%) as Stage 3, and 30 (10.3%) as Stage 4. For grading, 34 (11.7%) were classified as Grade A, 193 (66.1%) as Grade B, and 65 (22.2%) as Grade C. Results of multilevel Cox regression analyses revealed a statistically significant association between stage (HR:3.73 between stage 4 and Stage 1) and grade (HR: 4.83 between grade C and grade A) at baseline and periodontal related tooth loss, while no differences were detected for the extent of periodontitis.
CONCLUSION: This study provides the initial evidence regarding the predictive ability of the new classification of periodontitis. Patients in either Stage 4 or Grade C showed a significantly higher periodontal-related tooth loss. This article is protected by copyright. All rights reserved.
METHODS: Patients presented with periodontitis at the University of Michigan between January 1996 and January 2004 were screened and categorized according to the new classification of periodontitis. Number/Reasons of teeth loss in patients who underwent at least one session/year of maintenance during the entire follow-up period were extracted and utilized to analyze the prognostic capabilities of variables (Staging, Grading and Extent) included in the new classification.
RESULTS: A total number of 292 patients with a mean follow-up of 289.7 ± 79.6 months were included. 31 (10.6%) patients were classified as Stage 1, 85 (29.1%) as Stage 2, 146 (50%) as Stage 3, and 30 (10.3%) as Stage 4. For grading, 34 (11.7%) were classified as Grade A, 193 (66.1%) as Grade B, and 65 (22.2%) as Grade C. Results of multilevel Cox regression analyses revealed a statistically significant association between stage (HR:3.73 between stage 4 and Stage 1) and grade (HR: 4.83 between grade C and grade A) at baseline and periodontal related tooth loss, while no differences were detected for the extent of periodontitis.
CONCLUSION: This study provides the initial evidence regarding the predictive ability of the new classification of periodontitis. Patients in either Stage 4 or Grade C showed a significantly higher periodontal-related tooth loss. This article is protected by copyright. All rights reserved.
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