In clinical decision-making, dentists have diverse views regarding the selection criteria for abutment teeth used for attachments in removable partial dentures (RPD). Many factors influence abutment tooth selection which is challenging for inexperienced practitioners and dental students.1 There are many criteria for abutment teeth selection for attachments in removable partial dentures. Many studies have been published concerning these complexities and clinical factors that influence the

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... t teeth' prognosis.2 Therefore, using the Dental Decision Support System (DDSS) aids in this decision-making process; it creates an exceedingly effective inference engine that analyzes these issues and helps resolve them. Such issues concern all dental procedures such as Endodontics, Oral Surgery, Periodontics, and patient health.3 Due to a lack of knowledge and experience, errors occur with concomitant failure. This system provides significant benefits in reducing errors, helping increase the confidence in abutment selection, and improving patient satisfaction.4 Methodology: DDSS is based on 58 rules that improve care quality and can be dynamically adjusted in future studies. The validation of the system was evaluated via a questionnaire designed to be answered by experienced Prosthodontists. The questionnaire was sent to 31 dentists at Rutgers University, New York University, and some dental offices in NJ and NY. Cronbach's Alpha and Pearson Correlation Coefficient tests in the SPSS were used to measure the system's reliability by analyzing the answers to questionnaires. Results: The Cronbach's Alpha test showed 0.918, representing the internal consistency and indicating the agreement about the system's viability for inexperienced dentists and dental students in making the appropriate decision. The Pearson Correlation Coefficient test also showed the validity of the questionnaires. Conclusion: DDSS will help determine the appropriate abutment teeth used in attachment retained RPD (AR- RPD) to attain increased patient sat [...]