0000059253 00000 n MATERIAL AND METHODS: 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 … 0000047621 00000 n Ravikumar Suryakanth Akulwar and Ashwin Kodgi, Non-Rigid Connector for Managing Pier Abutment in FPD: A Case Report www.jcdr.net Journal of Clinical and Diagnostic Research. A non-rigid connector is a broken-stress mechanical union of retainer and pontic, instead of the usual rigid connector. 0000008015 00000 n 0000065893 00000 n 4. 0000088265 00000 n 0000054613 00000 n Use of the non-rigid connector is restricted to a short span fixed partial denture replacing one tooth. 0000041313 00000 n Markley suggested placement on one of the terminal abutments and not at the pier abutment. %%EOF Stress principle & design in fixed prosthesis. Introduction The occlusal forces applied to a fixed partial denture are transmitted to the supporting structures through the pontic, connectors, and retainers [1]. Akulwar R. F, Kodgi A. Steffel V.L, Columbus, Ohio. Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. Key words: non-rigid connectors, road traffic accident, key key-way, tenon, mortise. Thus the use of non rigid connector in case of pier abutment is recommended. Information is needed regarding the biomechanical behavior and the position of a nonrigid connector for this treatment option. 0000078187 00000 n %PDF-1.5 %���� In pier abutment FPDs, a rigid connector may not be an ideal choice due to: Difference in physiological tooth movement of different teeth. 0000082970 00000 n 0000073944 00000 n 0000034593 00000 n However, such fixed and rigid restorations have been associated with a higher rate of debonding, microleakage, caries, etc., The aim of the modern day prosthodontics is the preservation of what remains as given by M.M Devan. 0000048041 00000 n The use of a rigid connector in a five unit fixed dental prosthesis (FDP) can lead to localization of forces on the pier abutment which acts as a fulcrum. The authors did not provide reasoning for their recommendations. KEYWORDS: Pier abutment, on –rigid connector, reverse orientation of key, key-way INTRODUCTION We are more accustomed to the use of rigid connector in clinical practice since its placement requires minimum technical and laboratory expertise. 0000065962 00000 n A non-rigid connector is avoided when the posterior abutment … Int J Res Dent 2014;4:224-8. Material and methods: The three-dimensional (3D) finite element program (ANSYS software) was used to construct the mathematical model. Periodontal health was evaluated and oral prophylaxis was advised. Keywords:non-rigid connectors, aesthetic, maxilla, pier abutment I. 0000006058 00000 n 0000013105 00000 n 0000035646 00000 n Research paper by Ravikumar Suryakanth RS Akulwar, Ashwin A Kodgi Indexed on: 02 Sep '14 Published on: 02 Sep '14 Published in: Journal of clinical and diagnostic research : JCDR Objective: The aim of the study is to evaluate the stress distribution in tooth supported 5-unit fixed partial denture (FPD) having tooth as pier abutment using rigid and nonrigid connectors respectively, under simultaneous and progressive loading. The biomechanics of most commonly used fixed-fixed bridges falls deficient to justify load transmission in complex cases like pier abutments supporting a long span fixed prosthesis. 0000084853 00000 n in the pier-abutment case. Non-rigid connector placed on the distal aspect of pier seems to reduce potentially excess stress concentration on the pier abutment. Thus the use of non rigid connector in case of pier abutment is recommended. Markley MR. Broken-stress principle and design in fixed bridge prosthesis. 0000007693 00000 n 0000021719 00000 n rigid connector often faces a scenario of clinical failure as the centre abutment is subjected to fulcrum like forces. Advertisers Access Statistics Resources. The authors did not provide reasoning for their recommendations. When prosthesis comes in function, the pier abutment acts as fulcrum, and high-stress concentration may occur at pier abutment ensuing in excessive displacement at terminal abutments. 0000036187 00000 n Adams3 advised placing one non-rigid con-nector at the distal side of the pier, and if desired, adding one more at the distal of the anterior retainer. 0000006093 00000 n 4. Rigid connectors though most commonly used, result in early failure of the prosthesis such as debonding as well as put adverse effects on the abutments when used in the case of pier abutment. The frequent use of rigid connectors in day to day practice in such situations results in failure and instability of the prosthesis. The goal of this case report is to discuss the use of key and keyway, a type of non-rigid connector to rehabilitate a patient with a pier abutment situation. 0000005354 00000 n STATEMENT OF PROBLEM: In some patients, the pattern of missing teeth may require the use of a fixed partial denture (FPD) with an intermediate pier abutment. Gill2 rec-ommended placing non-rigid connectors at one side or both sides of the pier abutment. Fixed partial denture with all rigid connectors is less than ideal treatment plan for a 5 unit fixed partial denture involving pier abutment. Banerjee S, Khongshei A, Gupta T, Banerjee A. Non-rigid connector: The wand to allay the stresses on abutment. Diagnostic impressions were made and diagnostic casts were fabricated. 0000054682 00000 n Keywords: Pier abutment, Stress-breaker, Non-rigid connector Introduction A common clinical situation that presents itself to a dentist is the missing first premolar and molar in maxillary or mandibular arch. Broken MK. There is a conflicting opinion on where to place the non-rigid connector. It has contributed a huge number of peer reviewed articles, across a spectrum of medical disciplines, to the medical literature. Broken-stress principle and design in fixed bridge prosthesis. 0000006792 00000 n 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. Non-rigid connectors transfer less stress to abutments also allowing physiologic tooth movement. 0000006033 00000 n nects v. tr. Because of physiologic tooth movement, arch position of the abutments, and the retentive capacity of the retainers, a nonrigid connector may be preferred in the fabrication of a five-unit pier-abutment fixed partial denture. J Cli Diag Res 2014;8:12-14 6. Author: Dr. Krithi Venkataraman, Dr. Ravishankar Krishna Abstract: Pier abutment is characterized by a lone standing abutment with edentulous regions on either side of it. Gill2 rec-ommended placing non-rigid connectors at one side or both sides of the pier abutment. Therefore, the use of a non-rigid connector as a stress breaker has been advocated to alleviate the situation. 0000006568 00000 n One such clinical situation is existence of a pier abutment in between two edentulous areas. The use of a rigid connector can lead to localization of forces on the pier abutment. 0000082476 00000 n 7, July 2011. Use of non-rigid connector in management of pier abutment: A case report-APRD-Print ISSN No:-2581-4796 Online ISSN No:-2581-480XArticle DOI No:-10.18231,IP Annals of Prosthodontics and Restorative Dentistry-IP Innovative Publication Pvt Limited, Medical Journals Publication, Open Access Journals, Print … 2. Gill JR. 0000047882 00000 n Nonrigid connectors for fixed partial dentures. 0000070610 00000 n Notes . (4.) Broken MK. Indigenously Fabricated Non-rigid Connector for a Pier Abutment Sudhir N, et, al. None. Non-Rigid Connector for Managing Pier Abutment in FPD: A Case Report. The biomechanics of most commonly used fixed-fixed bridges falls deficient to justify load transmission in complex cases like pier abutments supporting a long span fixed prosthesis. • It provides a scope for flexing of mandible during opening and closing movements but it is technically sensitive. 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