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Provision of partial and complete dentures constructed from resin is commonplace and a satisfactory outcome requires the consideration of the properties of the resin, the oral tissues and prosthodontic principles. This second of a two-part series examines the advantages and disadvantages of flexible nylon denture base resins, which have found popularity for the provision of partial dentures. Adverse effects of denture base resins are examined and the benefits and shortcomings of softliners are explored. Chairside adjustment and polishing, and denture hygiene are also discussed.
Clinical Relevance: Knowledge of contemporary denture base resin systems will help to achieve optimal outcomes in removable prosthodontics.
Article
Increasingly, dental patients are retaining their teeth, owing in large part to improved oral health awareness. Those patients who are unfortunate enough to lose teeth often enquire about the possibility of replacing missing teeth with fixed prostheses which, as a result of implant therapy, is increasingly possible. However, there remains a demand for ‘simple’ removable dentures by a significant proportion of patients who are completely or partially edentulous. These are most commonly made either entirely of acrylic, or may consist of acrylic saddles on a cobalt chromium framework, in the case of partial dentures. Acrylic has a good track record and fulfils many of the ideal properties of a denture base material but its use is a compromise. A number of its benefits and shortcomings were discussed in part one of this series and others, such as soft-lining acrylics and the potential of acrylics to cause adverse effects, are examined in this second section. However, we begin by exploring the use of flexible nylon denture base resins as an alternative to hard acrylic.
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