IMPRESSION FAULTS USING IRREVERSIBLE HYDROCOLLOID IMPRESSION MATERIAL BY UNDERGRADUATE AND GRADUATE STUDENTS
The aim of this study was to evaluate faults in impression taken by undergraduate and graduate students using Irreversible Hydrocolloid impression material. Descriptive study was carried out at Prosthodontics Department of Liaquat University of Medical and Health Sciences Jamshoro from January 2017 to December 2017. Total three hundred impressions of patients were taken by undergraduate and graduate students. Recorded Impressions were evaluated by one operator to check faults that were recorded in structured Proforma.
Most common error found in 300 impressions taken by undergraduates and graduate students in descending orders were air bubbles (59%), inadequate sulcus record (53%), tearing of impression material from tray (40%), improper mixing of material leading to incorporation of unmixed dry material (36%), presence of voids (35%), inadequate distal surface records (30%), improper palatal records (29%), under extended record (27%), improper occlusal thickness (27%), improper tray selection leading to rotated impression (17%) and separation of material from tray (15%) respectively. The relationship of faults of impressions with graduates and undergraduates was statistically non-significant. Impression is success for any prosthesis. Suitable impressions from alginate material can be made by appropriate or skillful techniques.