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Volume 29 , Issue 4
July/August 2016

Pages 399402


Predictors of Tooth Loss in Patients Wearing a Partial Removable Dental Prosthesis

Yoko Mizuno, DDS, PhD/Ross Bryant, BSc, DDS, MSc, PhD/Tomoya Gonda, DDS, PhD


PMID: 27479350
DOI: 10.11607/ijp.4630

Purpose: The partial removable dental prosthesis (PRDP) is used widely to replace missing teeth, but it can disturb the ecology of the mouth. In this retrospective cohort study, the null hypothesis was that there was no difference between tooth loss and the type of edentulous spaces in participants wearing PRDPs. Materials and Methods: Participants were selected from patients who were treated consecutively with PRDPs between January 2003 and December 2006 by undergraduate dental students at the University of British Columbia and attended the clinic for at least 5 years following placement of the PRDP. Clinical records were analyzed for 50 men and 52 women aged 19 to 85 years at baseline, before placement of the PRDP (mean age: 63.2 years). Baseline data were obtained from the records on missing teeth and edentulous spaces, and thereafter data were collected on teeth lost over the following 5-year period. Baseline data on age, sex, occlusal contacts, number of dental rests for the dentures, carious teeth, gingival attachment loss, and teeth with endodontic fillings were also obtained. Results: The presence at baseline of teeth with endodontic fillings significantly (P < .05) increased the prediction of tooth loss over the 5 years, but the type of edentulous space did not. Conclusion: The risk of tooth loss over a 5-year period was higher in the presence of endodontically treated teeth, but no higher in participants wearing PRDPs with distally extended edentulous spaces rather than tooth-bounded edentulous spaces.


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