where an intermediate pier abutment is present with a single casting (rigid connectors) is not an ideal treatment. B, The components are related to one another by a soldering assembly. Thus, the design and passive fit of non-rigid connectors is significant to success of â¦ 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. A five unit fixed dental prosthesis with a pier abutment poses a unique challenge of a fulcrum and torquing forces at the intermediate abutment. Therefore, the use of a non-rigid connector as a stress breaker has been advocated to alleviate the situation. 2. Indian J Dent Adv 2011; 3 Suppl 1: 770-773 Fig 1.  Gill (1952) recommended placing non rigid connector at one side or both sides of pier abutment. Square orthodontic bracket sliced longitudinally to act as the keyway and attached to distal wall of 25 The non-rigid connector counterbalances the effects of these forces of leverage. Intra oral presentation with 24, 26 missing and 25 acting as pier abutment Fig 2. 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. Indigenously Fabricated Non-rigid Connector for a Pier Abutment Sudhir N, et, al. The existence of malaligned abutment, where parallel preparation might result in devitalisation. Material and methods. Non-rigid connectors convey loads to supporting bone rather than concentrating it in the connectors. 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¦ 28-1 Rigid connectors: A three-unit partial fixed dental prosthesis (FDP) replacing the maxillary second premolar. Markley (1951) suggested that non rigid connector should be placed at one of the terminal 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. The use of a rigid connector can lead to localization of forces on the pier abutment. 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. 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. Non-rigid connectors transfer less stress to abutments also allowing physiologic tooth movement. 1. Keywords: Connector, non-rigid connector, pier abutmentâ¦ The selection of proper connector is important step in treatment planning of pier abutment. Fig. A nonrigid connector may be preferred in fabrication of fixed partial denture (FPD) with pier abutment. 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. 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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