Clinical ResearchEndodontic Treatment Outcomes in a Large Patient Population in the USA: An Epidemiological Study
Section snippets
MATERIALS AND METHODS
Data for this study were obtained from the Delta Dental Insurance Data Center located in Seattle, WA. This company insures approximately 14 million individuals in 50 states across the USA. It has maintained a computerized database of its claims since 1993.
The protocols and guidelines of evidence-based medicine for prognosis and outcome analysis as suggested by Sackett et al. were followed (7). These included analysis of a large patient population, common point for analysis initiation, long
RESULTS
A total of 1,462,936 teeth were evaluated in this study and included 309,979 anterior teeth (21%), 390,343 premolars (27%), and 762,614 molars (52%). At the end of the 8-yr observation period, a total of 1,420,963 teeth (97.1%) were retained in the oral cavity.
DISCUSSION
Endodontic treatment outcomes are related to treatment expectations (1). Often, the many endodontic outcome studies published in the literature vary in their results regarding the incidence of success and failure of initial endodontic therapy. While in several studies treatment success is measured by radiographic and clinical normalcy, others refer only to clinical normalcy (2, 3).
In this study, we attempted to analyze the outcomes of initial endodontic treatment from an epidemiological
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The authors thank Dr. Michael Del Aguila from Delta Dental data center for assisting in data collection, Dr. Michael Melnick for the statistical analysis and the USC Endodontic Innovation and Development Fund.