Treatment history of teeth in relation to the longevity of the teeth and their restorations: Outcomes of teeth treated and maintained for 15 years
Section snippets
Material and methods
A total of 548 healthy patients who initiated dental treatment from 1980 to 1988, between the ages of 18 and 73 years, were selected from the patient records of a private office in Yamagata, Japan. Follow-up times ranged from 15 to 23 years, with a mean of 19.2 years (SD 2.4). Patients provided informed consent to the treating dentist before treatment was initiated. Clinical staff collected data and stripped the data of personal identifiers before providing the data to the collaborators on this
Results
Descriptive statistics based on patient-level data were calculated for the baseline age and clinical variables, such as bleeding on probing, plaque index, percentage of sites with probing depths less than 3 mm, percentage of sites with probing depths ranging from 4 to 6 mm, and percentage of sites with probing depths greater than 7 mm (Table I). Descriptive statistics based on tooth-level data for treatment history, such as RT1, AFT, APDT, and RCT, were calculated and are presented in Table II.
Discussion
Most of the results from this study appear intuitive. However, in this age of evidence-based health care, dentists, patients, and third-party payers are seeking substantive data from clinical studies to support treatment decisions. This study provides such data. The longevity of unrestored teeth was superior to that of teeth with any restoration. Therefore, preventing the need for restorations, such as the application of pit and fissure sealants, dietary counseling, daily use of fluoridated
Conclusions
Based on the results of this retrospective study and within the limitations of the study design, the following conclusions were drawn:
- 1.
Unrestored teeth had the best overall survival when compared with restored teeth (including single-surface and multisurface restorations), endodontically treated teeth, and abutments for FPD and RPD prostheses.
- 2.
Teeth with 3 to 5 surface restorations were 4 times more likely to fail when compared with unrestored teeth.
- 3.
Complete crowns and abutments for FPD
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This study was supported by NIH/NIDCR Grant No. R03DE016924.