Fazal Ghani, Muhammad Rizwan Memon, Muhammad Raza.
Concepts, techniques and materials used for complete denture impressions by dental house officers.
J Pak Dent Assoc Jan ;17(1):5-11.

OBJECTIVE: To report data relating to concepts, techniques and materials used by dental house-officers of local dental institutes. SUBJECTS AND METHODS: With the use of a questionnaire, data relating to concepts, techniques and materials used for edentulous impressions were collected from 140 house officers of 10 local dental institutes. Of these, 121 house officers retuned the completed questionnaires, yielding a response rate of 86.4%. RESULTS: 96.7% followed the 2-step impression concept of preliminary and final impression. Some 71.9% preferred impression compound only as preliminary impression material. 94.2% used special trays for secondary impressions. Some 43.8% were making them in self-curing denture-base acrylic resin. Border-molding, prior to final impression was preferred by 95.9%, out of which 86.8% were using low fusing impression compound. Vent-holes to allow escape of excess impression material were incorporated by 40.5%, of which 38.0% favored two or more vent-holes. Some 95.9% used zinc-oxide-eugenol alone as the final impression material. Recording of the reline-impression using the open-mouth technique at trial-stage, was preferred by 63.6%. Very few knew about the special impression techniques of functional, sectional, admix, window or plaster-stent impression. Statistical analyses of the data, using chi-square test showed insignificant association between the responses from the graduates working in the public sector and private sector dental institutions. CONCLUSION: Concerns and issues regarding the non-use of latest impression materials and techniques related to complete denture impressions and a lack of understanding of the related concepts of participants were observed. Strategies for rectification of these are emphasized.

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