Non-rigid connectors in fixed prosthodontics: Current concepts with a case report

Badwaik, PV; Pakhan, Ashok J

doi:10.4103/0972-4052.16879

Cited by 16 publications

(17 citation statements)

References 2 publications

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“…In certain partially edentulous situations, the pattern of missing teeth may entail the use of fixed partial denture (FPD) utilizing pier abutment. [ 1 2 ] Pier abutments have attracted the interest of clinicians and researchers worldwide. [ 3 ] However, it has been reported that restoration of two missing teeth and an intermediate pier abutment with a rigid FPD is not an ideal treatment option.…”

Section: Introductionmentioning

confidence: 99%

A three-dimension finite element analysis to evaluate the stress distribution in tooth supported 5-unit intermediate abutment prosthesis with rigid and nonrigid connector

et al. 2015

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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.Material and Methods:The three-dimensional (3D) finite element program (ANSYS software) was used to construct the mathematical model. Two 5-unit FPD’S were simulated, one with rigid connector and another one with nonrigid connector. For analysis, each of these models were subjected to axial and oblique forces under progressive loading (180, 180, 120, 120, 80 N force on first and second molars, premolars and canine respectively) and simultaneous loading (100, 100, 100, 100, 100 N force on first and second molars, premolars and canine respectively).Results:The rigid and nonrigid connector design have effect on stress distribution in 5-unit FPDs with pier abutments.Conclusion:Oblique forces produce more stresses than vertical forces. Nonrigid connector resulted in decrease in stress at the level of prosthesis and increase in stress at the level of alveolar crest.

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Section: Introductionmentioning

confidence: 99%

A three-dimension finite element analysis to evaluate the stress distribution in tooth supported 5-unit intermediate abutment prosthesis with rigid and nonrigid connector

et al. 2015

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“…[910] They also contribute to increasing the stability, duration, and overall success of any long span FPD by functioning as safety valves against the leverage forces exerted by rigid connectors. [511]…”

Section: Discussionmentioning

confidence: 99%

“…The most commonly used NRC is of the tenon-mortise type consisting of a key (tenon or patrix) and a keyway (mortise or matrix), wherein a T-shaped key is locked in a dovetail-shaped key way, such that the cylindrically shaped keyway (mortise) is parallel to the path of the key (tenon). [51213] Other types of NRC used include cross pin and wing connector, loop connector, and split connector. [4]…”

Section: Discussionmentioning

confidence: 99%

“…NRC are generally indicated in FPD involving ier abutments; misaligned abutments requiring excessive preparation to achieve parallelism that could lead to pulp exposure; long edentulous span where distortion due to shrinkage from the pull of porcelain on thin sections of the framework is a possibility; anterior and posterior regions in the lower arch since the mandible flexes mediolaterally while opening and closing; abutments that cannot provide adequate retention and; mobile abutments that need to be splinted together. [56] However, this case report highlights the incorporation of a tenon-mortise type of NRC between two adjacent pontics in a fixed functional space maintainer (FFSM), to allow limited passive eruption and alignment of the abutments, that happened to be young permanent teeth. Never before in literature has an NRC been used between two adjacent pontics that constituted an FFSM.…”

Section: Introductionmentioning

confidence: 99%

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Fixed functional space maintainer incorporating a tenon-mortise connector

et al. 2018

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This case report highlights the incorporation of a tenon-mortise type of nonrigid connector between two adjacent pontics in a fixed functional space maintainer, to allow limited passive eruption and alignment of young permanent teeth. A 13-year-old male patient had lost his lower second premolar and first molar on the right side, secondary to the surgical removal of an odontogenic keratocyst a year ago. A space maintainer had to be placed until implants, or a fixed partial denture could be placed, after the completion of his growth. The appliance consisted of band type retainers with rests on the first premolar and the second molar, rigidly connected to their adjacent pontics (second premolar and first molar), with a tenon-mortise type of connector between the pontics. The casting was composed of nickel-chromium, out of which the pontics were layered with ceramic.

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“…The design and passive fit of NRC is critical to the success of a long-span FDP. (6) According to Shillinburg, the ideal location of the keyway is on the distal aspect of the pier abutment retainer while that of the key is on the mesial aspect of the distal pontic.…”

Section: Discussionmentioning

confidence: 99%

Pier abutment: Break the stress

2016

APRD

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Use of a conventional rigid five-unit fixed dental prosthesis is a less than ideal plan of treatment in pier abutment cases due to physiologic tooth movement, arch position of the abutments, and a disparity in the retentive capacity of the retainers. A non-rigid connector is a broken-stress mechanical union of retainer and pontic, instead of the usual rigid connector. An innovative and cost effective way of fabricating a non-rigid connector is presented in this case report.

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Non-rigid connectors in fixed prosthodontics: Current concepts with a case report

Cited by 16 publications

References 2 publications

A three-dimension finite element analysis to evaluate the stress distribution in tooth supported 5-unit intermediate abutment prosthesis with rigid and nonrigid connector

A three-dimension finite element analysis to evaluate the stress distribution in tooth supported 5-unit intermediate abutment prosthesis with rigid and nonrigid connector

Fixed functional space maintainer incorporating a tenon-mortise connector

Pier abutment: Break the stress

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