Evaluation of the Clinical Preparation of Al-Wadi Private University Fourth Year Dental Students

Abstract

Background and Aim of study: The success of fixed prosthesis is directly connected to a precise and clean preparation of the teeth receiving those prosthesis. Therefore, there are many studies dedicated to evaluate the quality of teeth preparation done by fourth year dental students of Al-Wadi private university and to enhance the clinical preference and avoid any errors that might appear, in which this study is covering.

Materials and Methods: 60 stone casts of clinical cases prepared and presented by fourth year dental students of Al-Wadi private university to be studied and evaluated. The clinical case study is Porcelain fused metal partial fixed prosthesis for a missing lower first molar. Measurements for both abutments of the preparation angles of the axial walls tapering (mesial/distal and buccal/lingual), and abutment clinical height were studied using CAD/CAM scanner, in addition to studying the morphology of the occlusal surface with direct vision using a magnifying glass (well defined features, vague features, and no features)

Results :First abutment:Average tapering degree of the mesial/distal walls is 16.86°, and of the buccal/lingual walls is 12.66 Average clinical abutment height is 2.75mm. definition of the occlusal surface features: the percentage of well defined features is 31.66%, vague features percentage is 40%, and the percentage on no occlusal surface features is 28.34%.

 Second abutment :Average tapering degree of the mesial/distal walls is 21.76°, and of the buccal/lingual walls is 17.34°.Average clinical abutment height is 2.6mm.definition of the occlusal surface features: the percentage of well defined features is 28.33%, vague features percentage is 45%, and the percentage on no occlusal surface features is 26.67%.

Conclusion: within the limits of this study we conclude that the results of studying axial walls tapering percentages and abutments clinical height were clinically acceptable, as for the results of studying the occlusal surface morphology definition, they were not ideal according to the acceptable academic clinical criterias.

Keywords: Axial wall taper, preparation angles, abutment height, CAD/CAM.