The commitment of Fifth-year Damascus university' students and AL-Baath university' students with the scientific rules of teeth preparation to receive a full crown or a bridge in terms of walls inclination and occlusal surface reduction

Abstract

Introduction and aim of the study: Fixed prosthodontics is one of the most important works carried out within the dental treatments provided to patients, but in some cases, non-compliance with the scientific principles followed for such treatments leads to some problems. The idea of this research came to assess the commitment of students of Damascus University and students of Al-Baath University in the fifth year to the scientific foundations for preparing Teeth prepared to receive a full crown or bridge in terms of the inclination of the walls and the reduction of the occlusion surface.

Materials and methods: The research sample consisted of 244 gypsum casts of abutments prepared by fifth-year students divided into two groups 122 casts at Damascus University 122 casts from Al-Baath University with primary cast, then statistical tests were conducted using SPSS v.26 (IBM, USA) program, with significance level (0.05).

Results: The arithmetic mean of mesial and distal molar inclination was 39.7 at Al-Baath University and 29.5 at Damascus University, the premolars were 30.4 in Al-Baath University and 24.1 in Damascus University.

The bucco-lingual inclination was 36.3 for Al-Baath University and 31.6 for Damascus University. But in premolars, the values were 28.8 for Al-Baath University and 24.7 for Damascus University. The arithmetic mean of occlusion surface preparation from the bucco- lingual and medial molars at Al-Baath University was 1.7 mm, 1.3 mm and 1 mm, while at Damascus University it was 1.5 mm, 1.5 mm and 0.9 mm without any statistical difference.

While in premolars of AL-Baath university' students it ranged between 2 mm, 1.6 mm and 1 mm, while in Damascus University it ranged between 2 mm, 1.5 mm and 0.9 mm without any significant difference between the two universities.

Conclusions: The taper of the axial walls of the molars and premolars prepared in both Damascus University and Al-Baath University is greater than the recommended reference values, and it was less in Damascus University than in Al-Baath University. While the occlusin surface reduction for both molars and premolars are within the recommended reference values without any significant difference between the two universities.