IMPRESSION TECHNIQUES AND MATERIALS USED FOR FABRICATION OF EXTRACORONAL RESTORATIONS; A SURVEY
The aim of this study was to determine the most common impression materials and techniques used for fixed restorations among dental practitioners in Karachi, Pakistan.
A cross-sectional random study with a convenient sampling technique was carried out among the practitioners over the period of 2 Months. A confidential questionnaire was designed to access details of the impression techniques, materials and trays used in fixed extra coronal restorations. The questionnaire was handed over personally to 150 dentists in Karachi out of which 100 dentists responded to it.
In this study, the response rate was 66.6%. The results showed that out of the 100 dentists 37 were general dentists, 17 were prosthodontists and 47 belonged to other specialties. The study showed that most commonly used impression technique among practitioners in Karachi was putty reline dual mix without spacer, out of the total 35.1% general dentists used this technique while 70.6% prosthodontists preferred it. The most common material used for recording impression of fixed restorations was addition silicone rubber base (53%).
For the fabrication of extra-coronal restorations, clinicians used the impression material and technique with best properties to ensure an ideal fit, longevity of restoration and patient comfort.