B, The components are related to one another by a soldering assembly. A five unit fixed dental prosthesis with a pier abutment poses a unique challenge of a fulcrum and torquing forces at the intermediate abutment. A nonrigid connector may be preferred in fabrication of fixed partial denture (FPD) with pier abutment. Therefore, the use of a non-rigid connector as a stress breaker has been advocated to alleviate the situation. 1. This clinical report presents the use of a non-rigid connector in a long-span, five-unit FPD, replacing two missing teeth with an intermediate pier abutment. Keywords: Connector, non-rigid connector, pier abutmentâ¦ The existence of malaligned abutment, where parallel preparation might result in devitalisation. Non-rigid connectors convey loads to supporting bone rather than concentrating it in the connectors. The non-rigid connector counterbalances the effects of these forces of leverage. Fig. 2. Non-rigid connectors transfer less stress to abutments also allowing physiologic tooth movement. Indigenously Fabricated Non-rigid Connector for a Pier Abutment Sudhir N, et, al. A 3-dimensional cross-section FEM model (SAP 2000) simulating a 5-unit metal ceramic FPD with a pier abutment with rigid or nonrigid designs (connector location at the mesial region of the second molar, at the distal region of the second premolar, at the mesial region of the second premolar, and at the distal region of the canine) was developed. 28-1 Rigid connectors: A three-unit partial fixed dental prosthesis (FDP) replacing the maxillary second premolar. Thus, the design and passive fit of non-rigid connectors is significant to success of â¦ The use of a rigid connector can lead to localization of forces on the pier abutment. Square orthodontic bracket sliced longitudinally to act as the keyway and attached to distal wall of 25 The use of rigid connectors in 5-unit fixed dental prosthesis with a pier abutment can result in failure of weaker retainer in the long run as the pier abutment acts as a fulcrum. The existence of pier abutment which promotes a fulcrum-like situation that can cause the weakest of the terminal abutments to fail and may cause the intrusion of a pier abutment. The selection of proper connector is important step in treatment planning of pier abutment. Indian J Dent Adv 2011; 3 Suppl 1: 770-773 Fig 1. where an intermediate pier abutment is present with a single casting (rigid connectors) is not an ideal treatment. It allows two part of the fixed partial denture to move independently, by which mesio-distal torquing of abutments is minimized.The location of the non-rigid connector in this type of pier abutment â¦ Material and methods. If rigid connectors are used in this situation, the pier abutment will act as a fulcrum because of physiologic tooth movement, arch position of the abutment, and the retentive capacity of the retainers. The existence of Pier abutment, which promote a fulcrum-like-situation that can cause the weakest of the terminal abutments to fail and may cause intrusion of the pier abutment.  Gill (1952) recommended placing non rigid connector at one side or both sides of pier abutment. Markley (1951) suggested that non rigid connector should be placed at one of the terminal retainers. Intra oral presentation with 24, 26 missing and 25 acting as pier abutment Fig 2. A, The anterior abutment and the pontic are connected with a rigid cast connector.These two partial FDP components are fabricated separately from the posterior abutment, which is cast in gold.
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