The children's dental clinic at Cook County Hospital. 1924.
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The ultimate test of a restorative dental biomaterial is its performance in vivo. Often laboratory test data does not correlate directly with clinical performance, so clinical research with human patients is essential. Clinical research that obtains maximum information from a minimum number of patients must be well designed and controlled. Pilot studies are necessary to establish experimental conditions and to determine the sample size. Previous clinical studies with various restorative materials have shown that careful screening and comprehensive oral examinations of patients are necessary to insure maximum recall for evaluation. Controlled placement procedures and randomized alloy placement are extremely important. Restorations are evaluated both by the response of patients to the restorations and by trained and calibrated dental examiners using established ranking criteria. Quantitative data measured in vivo such as that obtained from stereophotogrammetry reduced the need for large patient populations. The interfacing of a computer to record patient, placement, and evaluation data assisted greatly in project management.
To determine whether financial incentives would have an impact on the quality of care, we compared patient satisfaction in a "regular" daytime postdoctoral general dentistry clinic and an "after-hours" clinic, using a 14-item mail questionnaire to a randomly selected sample of adult patients, stratified by age and gender. The providers in both clinics were identical; however, the method of compensation was different. When residents treated patients in the regular clinic, they were paid a fixed stipend, while the "after-hours" clinic residents' compensation was fee-for-service. The percentage of patients giving very favorable or favorable responses was high in both clinics. However, the response of patients in the "after-hours" clinic was more favorable for total number of visits required for care to be completed, management of pain, and politeness of receptionists. This study demonstrated that the payment of financial incentives to residents did not reduce and may even have enhanced patient satisfaction.
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