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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. Conventional acrylic resin has been widely adopted as a popular denture base material since the 1930s. In this first of a two-part series, the benefits and shortcomings of acrylic resin are discussed alongside contemporary ‘enhancements’ to the material which can improve its properties. In the second part of the series, flexible and other alternative denture base resins, soft-linings, adverse effects of denture base materials and maintenance will be discussed.
Clinical Relevance: Knowledge of contemporary denture base resin systems will help to achieve optimal outcomes in removable prosthodontics.
Article
Despite increased oral health awareness amongst patients, acceptance of the ‘shortened dental arch’ concept,1 and technological advances such as implant therapy, there remains a demand for simple removable dentures in general dental practice. Complete dentures are conventionally constructed in acrylic resin and, although cobalt chromium partial dentures have many advantages in a variety of clinical situations, all-acrylic removable partial dentures are frequently provided by, and appear to be preferred by, many practitioners.2 Alongside conventional simple acrylic, many commercial laboratories offer ‘upgrades’, such as flexible, injection-moulded, high-impact and fibre-reinforced dentures. This two-part series offers a guide to when the selection of these options may be useful and discusses underlying factors influencing choice.
The ideal denture base material should:
Maintenance of the supporting tissues in a physiologic condition is a priority when constructing complete or partial dentures, and changes can be caused by unequal and inappropriate distribution of normal functional forces and plaque accumulation around remaining teeth.
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