Tooth loss over five years

Persson, Rigmor; Persson, Gösta Rutger; Hollender, Lars G; Lang, Niklaus Peter; Kiyak, H. Asuman (2006). Tooth loss over five years. In: Pan European Federation of IADR (PEF 2006). Dublin Ireland. September 13-16, 2006.

Objectives: To assess the ability to predict tooth loss on the basis of clinical and radiographic parameters. Methods: Clinical and radiographic data from a five year prospective cohort were studied to identify cause of progressive tooth loss in older subjects. Results: 363 subjects with a baseline mean age of 67.1 years (S.D. + 4.7, range : 60-75), and 51.4% women were studied including 59.5% never smokers, and 33.0% current smokers. At baseline the subjects had, on average, 22.4 teeth (S.D. + 6.4). Self-assessed tooth loss risk was identified by 16.0 % of subjects while 34% of subjects lost teeth. Tooth loss due to caries was found in 24.7% (178 teeth), periodontitis in 15.4% (133 teeth), peri-apical lesions 5.9% (32 teeth), combined periodontal/peri-apical in 3.4% (18 teeth), and teeth irrational to treat in 7.5% (58 teeth) of the subjects. 122 of the extracted teeth (34%) should have been possible to save but were extracted. At year five severe caries, periodontitis, peri-apical lesions, periodontal/peri-apical, irrational to treat were found in 6.3%, 7.2%, 2.6%, 4.6%, and 1.2% of subjects, respectively. Signs of osteoporosis increased by 11.2 % (Klemetti index). Linear regression analysis failed to include smoking habits as being explanatory. Explanatory factors were researcher prediction of extraction needs, subject self assessment of risk and change in ostoporosis status (r2 = 0.39, ANOVA, F=22.6, p< 0.001). Conclusions: Caries and periodontitis are primary causes for extraction. Progressive osteoporosis is associated with tooth loss. Radiographs, and subjects self-assessment of risk for tooth loss are robust predictors.

Item Type:

Conference or Workshop Item (Abstract)


04 Faculty of Medicine > School of Dental Medicine > Department of Periodontology

UniBE Contributor:

Persson, Rigmor; Persson, Gösta Rutger and Lang, Niklaus Peter


600 Technology > 610 Medicine & health




Eveline Carmen Schuler

Date Deposited:

04 Oct 2013 14:52

Last Modified:

25 Jan 2017 12:17

Additional Information:

Abstract 2586

URI: (FactScience: 19614)

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