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How well are complete dentures copied?

Abstract

Objective: To assess how accurately the same set of complete dentures could be copied by 12 different laboratories.

Design: A prospective study.

Settings: Completed by commercial laboratories used by GDPs in England (1996). Results were analysed and controlled by a university department.

Subjects (materials) and methods: The master set was constructed to include a midline diastema and a bilateral posterior crossbite. Twelve sets of silicone moulds of the master denture were prepared. GDPs selected commercial laboratories of their choice to receive the work.

Main outcome measures: All stages of the work were compared with the master dentures by returning them to a specially adapted articulator. Analysis was completed using preset criteria.

Results: Only five of the returned copies were considered to have both good quality acrylic resin work and clear details of the teeth in wax. Only four cases reproduced the diastema. After processing, the occlusal vertical dimension had been increased in eight of the cases and the bilateral crossbite had been eliminated in all cases.

Conclusions: None of the final copy dentures were considered an accurate copy of the master dentures. There is considerable scope for further training of dental technicians in this important technique

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Kippax, A., Watson, C., Basker, R. et al. How well are complete dentures copied?. Br Dent J 185, 129–133 (1998). https://doi.org/10.1038/sj.bdj.4809748

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