The reciprocal clasp arm also may act to a minor degree as an indirect retainer. The content on this website is for information only. An example would be a tooth-borne partial denture in which a posterior abutment was periodontally involved. Fulcrum lines and Indirect Retainers. For the sake of clarity in discussion of the location and functions of indirect retainers, fulcrum lines should be considered the axis about which the denture will rotate when the bases move away from the residual ridge. We can help to analyze expenditure and achieve savings in a variety of categories. Figure 8-5 Example of indirect retention used in conjunction with a palatal plate–type major connector. Figure 8-3 Indirect retainer principle. Indirect retainer rest seat. The so-called indirect retainer is a major connector stabilizer. Indirect Retainers. Indirect retainer a part of a removable partial denture which assists the direct retainers in preventing occlusal displacement of the distal extension bases by functioning through lever action on the opposite side of the fulcrum line. This lesson explores the impact of biosecurity threats, and why they need to be identified and managed. Learn vocabulary, terms, and more with flashcards, games, and other study tools. C, In a Class II arch, the fulcrum line is diagonal, passing through the abutment on the distal extension side and the most posterior abutment on the opposite side. Figure 8-5 Example of indirect retention used in conjunction with a palatal plate–type major connector. A secondary function of auxiliary occlusal rest assemblies is to prevent settling of the anterior portion of the major connector and to provide stabilization against horizontal rotation. Indirect Retainers – Myth or Reality In this example the mesial rest on the right maxillary premolar acts as an indirect retainer. https://www.consultingsuccess.com - In this video you'll learn about the two types of consulting retainers and how you can use them effectively with clients. The principal occlusal rests on the primary abutment teeth … The decision to use an incisal rest or cingulum rest will depend on the patient’s concern for the esthetic impact of an incisal rest versus having a crown (for the cingulum rest). Indirects. Flashcards. A secondary function of auxiliary occlusal rest assemblies is to prevent settling of the anterior portion of the major connector and to provide stabilization against horizontal rotation. Frank RP, Nicholls JI. The direct retainers provide the partial denture with the ability to resist movement away from the basal seating tissues. charlpratt. They are converted to indirect retainers when they have a terminal rest. The denture base can provide some retention by adhesion, cohesion, atmospheric pressure, polished surface contours, and gravity. As was described in Chapter 4, partial denture movement can exist in three planes. Since 1992, our strategic sourcing team has helped dozens of clients to realize savings and increase efficiency in both direct and indirect spend categories. See more. As clinically important as direct retainers, indirect retention (rests and minor connectors) and its principles to counteract the dislodgment of the RPD are also expressed. D, If the abutment tooth anterior to the modification space lies far enough removed from the fulcrum line, it may be used effectively for support of the indirect retainer. Attention to the details of design and location of partial denture component parts in control of functional movement is the strategy used in partial denture design. Tooth-supported partial dentures effectively use teeth to control movement away from the tissues.

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