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Acrylic dentures: fill the gap. part 2. indirect retention, major connectors, review of the design and case study Wouter Leyssen Jasmeet Heran AD Walmsley Dental Update 2024 50:2, 707-709.
Authors
WouterLeyssen
BDS, MJDF, MSc
Specialty Dentist in Restorative Dentistry, Birmingham Community NHS Healthcare Foundation Trust
Many dental students find the principles of partial denture design difficult to learn. It is also recognized that dentists in general practice within the UK do not always provide sufficient design specification on their laboratory prescription. It therefore seems that confusion about how to come up with a suitable denture design persists after graduation. The aim of the second part of this series relates to design principles of indirect retention, designing the major connector and how to put together all these elements when reviewing the overall design, and how to apply the denture concepts to a case study. This article also discusses recent advances in mucosal-borne partial dentures.
CPD/Clinical Relevance: This article revises the principles of partial denture design specifically in relation to mucosal-borne partial dentures.
Article
Acrylic resin-based partial dentures, also referred to as mucosal-borne dentures, are commonly prescribed in general dental practice, but often do not receive as much attention within the dental curriculum. It is the aim of this series of articles to revisit the principles of partial acrylic denture design. The first article covered the system of designing these dentures with the focus on support, retention, reciprocation and bracing. The aim of Part 2 relates to design principles of indirect retention, designing the major connector and how to put together all these elements when reviewing the overall design, and how to apply the denture concepts to a case study. This article also discusses recent advances in mucosal-borne partial dentures.
Indirect retention can be defined as the effect achieved by one or more indirect retainers of a removable partial denture that reduces the tendency for a denture base to move in an occlusal direction or in a rotational path about the fulcrum line.1 Therefore, the denture design will need to include at least two clasps for this concept to be considered.
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