Evaluation of the mechanical behaviour of restoration dental materials is essential to understand their performance under different load conditions and to estimate their durability under clinical oral function. Restorative materials and dental tissues like other materials by having specific mechanical properties, such as static strength (i.e. compressive strength, tensile strength, flexural strength) and dynamic strength (i.e. fatigue strength). The selection of proper mechanical test type depends on the goals that the study claims to define. On such basis, the mechanical test can be chosen correctly. Laboratory studies should be designed as replications of the clinical oral circumstances to measure the mechanical and physical properties of a material and any arbitrary choices in the design of the study may result in large variations of data.
Tooth restoration is a common, routine procedure among dentists but still has its own difficulties especially for posterior teeth. As it is a straightforward procedure, some dentists are not aware of the difficulties that may contribute in reducing the longevity of the filling. The aim of the study is to determine the difficulties encountered during and after placement of restorative materials in deep cavities. Materials and methods:Standardized questionnaires were divided randomly among general private dental practitioners in Kuala Lumpur. Chi-square test was used to determine any significant factors associated with difficulties of material placement. Results:This study showed that the most frequent difficulties encountered among practitioners were to obtain good moisture control (39.0%). No significant association was found between obtaining good moisture control and year of clinical experience (p= 0.286) and also place of graduation with the manipulation of the materials (p= 0.542). Conclusion:Dental practitioners claimed that it was difficult to obtain good moisture control in placement of posterior restoration. Thus, it is an obligation of dental practitioners to practice proper isolation and good manipulation of materials on posterior restoration.
Dentist-related factors are one of the major influences on the material selection for
restoration of carious and non-carious tooth surface loss. There were conflicting results regarding
the impact of dentists' gender and age or length of clinical experience on restorative material
selection for posterior dentition. The aims of this study were to determine the influence of gender
and clinical experience on posterior restorative material selection among private dental
practitioner in Malaysia. (Copied from article).