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16.Impression Inaccuracies in Impressions Taken by Graduate and Undergraduate Students Using Irreversible Hydrocolloid Impression Material

Farzana Memon1, Rabia Chandio1, Rafia Khan2, Amber Faryal3, Syed Ahmed Omer4 and Sameer Quraeshi5

ABSTRACT

Objective: Current study was carried out to assess the impression inaccuracies in impressions using Alginate material (Irreversible Hydrocolloid impression material) taken by graduate and undergraduate students in Prosthodontic department of Isra Dental College Hyderabad. Good impressions were taken by using alginate impression material by proper or skilled techniques. For fabrication of any prosthesis, accurate impression is required.

Study Design: Descriptive study

Place and Duration of Study: This study was conducted at the Department of Prosthodontics at Isra Dental College Hyderabad completed in one year from Feb, 2018 to Jan, 2019.

Materials and Methods: Alginate impressions of total 600 patients were taken by graduate and undergraduate students. Impression errors were assessed by single person in all impressions taken by students and noted in the designed questionnaire. Data was analyzed thru SPSS version 21. Descriptive statistics such as frequency distribution, percentage and cross tabulation were included in Data analysis. The level of significance was set at <0.05%.

Results: The current research discovered the more frequent inaccuracies occurs in 600 alginate impressions which were taken by graduates and undergraduate dental students were air bubbles (60%), insufficient sulcus record (54%), tearing of impression material from tray (41.2%), inappropriate material mixing leading to incorporation of unmixed dehydrated material (37.2%), voids occurrence (36.4%), recording of insufficient distal surface (31.4%), recording of inappropriate palate (30.1%), under-extended recording (28.3%), inappropriate occlusal thickness (28.5%), incorrect selection of the tray which causes impression rotated (18.3%) and material separation from impression tray (16%).

Conclusion: In the current research, maximum percentage of errors were occurrence of air bubbles when impressions were taken by using the irreversible hydrocolloid impression materials by both graduate and undergraduate students and minimum errors were find out the material separation from the impression tray.

Key Words: Irreversible hydrocolloid material, Impression material, Impression inaccuracies.

Citation of article: Memon F, Chandio R, Khan R, Faryal A, Omer SA, Quraeshi S. Impression Inaccuracies in Impressions taken by Graduate and Undergraduate Students Using Irreversible Hydrocolloid Impression Material. Med Forum 2022;33(10):71-75.