alexa The quality of impressions for crowns and bridges received at commercial dental laboratories.
Biomedical Sciences

Biomedical Sciences

Biology and Medicine

Author(s): Winstanley RB, Carrotte PV, Johnson A

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Abstract OBJECTIVE: To determine the quality of impressions for crown and bridge work made in general dental practice. DESIGN AND SETTING: All impressions for crown and bridge work which had been sent to four commercial dental laboratories in the UK were assessed by two examiners, each laboratory being visited on two occasions. MATERIALS AND METHODS: 290 cases which had been received by the laboratories on the days of the visits were assessed for a number of factors related to quality. There was no selection or rejection--all impressions received were examined. RESULTS: Flexible plastic trays were used for the majority of working impressions for crown and bridge work in general dental practice (72\%), many had been re-used (> 13\%), defects in the recording of the prepared teeth were common, and cross infection control was not routine. CONCLUSIONS: Quality standards for impressions for crown and bridge work in general dental practice in the UK are a cause for concern if the sample of cases seen in this study is typical.
This article was published in Br Dent J and referenced in Biology and Medicine

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