COMPARISON OF LINEAR DIMENSIONAL ACCURACY BETWEEN ONE STEP AND TWO-STEP IMPRESSION TECHNIQUE

Introduction: It is particularly in restorative dentistry, where the first and most accurate impressions are essential in formulating dental prostheses. The objective of this research is to evaluate the level of linear dimensional accuracy for the one-step and the two-step impression techniques using the polyvinyl siloxane (PVS) material. Objectives: The study aimed to assess the one step and two step impression techniques in terms of linear dimensional accuracy using polyvinyl siloxane material. Materials and Methods:  Consequently, the present cross-sectional study was conducted at the Dentistry Department, Ayub Medical College Abbottabad, Pakistan, from 1st June, 2024 to 30th November 2024. A total of 30 participants were selected according to specific criteria. The two impression techniques for this study were one-step and two-step, using PVS material, and the linear dimensional accuracy was measured in three reference points. To compare the results between the two techniques, the results were subjected to paired t-tests. Results: The outcomes demonstrated that there were little differences in the model's linear dimensional accuracy between the two approaches.  Additionally, although the variation was not significantly different, the one-step method was slightly more precise than the other approaches. Conclusion: The outcome of the one step and two step impression procedure using the PVS material was in quite close agreement with each other.