EFFECT OF SEVERELY REDUCED BONE SUPPORT ON THE STRESS FIELD DEVELOPED WITHIN THE CONNECTORS OF THREE TYPES OF CROSS-ARCH FIXED PARTIAL DENTURES

Manda, M; Galanis, C; Georgiopoulos, V; Provatidis, C; Koidis, P

dc.contributor.author	Manda, M	en
dc.contributor.author	Galanis, C	en
dc.contributor.author	Georgiopoulos, V	en
dc.contributor.author	Provatidis, C	en
dc.contributor.author	Koidis, P	en
dc.date.accessioned	2014-03-01T01:30:17Z
dc.date.available	2014-03-01T01:30:17Z
dc.date.issued	2009	en
dc.identifier.issn	0022-3913	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19529
dc.subject	Fixed Partial Denture	en
dc.subject	Stress Field	en
dc.subject.classification	Dentistry, Oral Surgery & Medicine	en
dc.subject.other	REMOVABLE PARTIAL DENTURES	en
dc.subject.other	FINITE-ELEMENT-ANALYSIS	en
dc.subject.other	LEAST 5 YEARS	en
dc.subject.other	PERIODONTAL PATIENTS	en
dc.subject.other	COMPLICATION RATES	en
dc.subject.other	CANTILEVER	en
dc.subject.other	TOOTH	en
dc.subject.other	PROSTHODONTICS	en
dc.subject.other	EXTENSION	en
dc.subject.other	SURVIVAL	en
dc.title	EFFECT OF SEVERELY REDUCED BONE SUPPORT ON THE STRESS FIELD DEVELOPED WITHIN THE CONNECTORS OF THREE TYPES OF CROSS-ARCH FIXED PARTIAL DENTURES	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0022-3913(08)60292-9	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0022-3913(08)60292-9	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Statement of problem. Increased technical failure has been reported For cross-arch fixed partial dentures (FPDs), particularly for cantilever units with minimum osseous support. Purpose. The purpose of this study was to investigate the effect of severely reduced bone support on the stress field developed within the connectors for 3 types of cross-arch FPDs. Material and methods. Six digital parametric models were developed, derived from a 3-demensional (3-D) initial model. The latter simulated a human mandible, dentate bilaterally to second premolars, with normal height of alveolar bone. In the initial model, the teeth were prepared and splinted with a cross-arch FPD bilaterally with one of the following: no cantilever, 1-unit cantilever, or 2-unit cantilever. All structures were obtained from computed tomography (CT)-scan images or constructed in 3-D computer-aided design (CAD) and reverse engineering environments. A 3-D finite element analysis (3-D FEA) was performed. Results. The reduction of the alveolar bone in the no-cantilever FPD model caused a greater increase of stress in the region of connectors among the splinted teeth in comparison to the 1- and 2-unit cantilever FPD model. The stress state within the connectors of the cantilever segment remained constant. The connectors proximal to the retaining abutment demonstrated the highest stress values, independent of the osseous support. The stress values in the region of the same connectors in the 2-unit cantilever restoration were almost double, compared to the 1-unit cantilever model. Decreasing the osseous level in the 1- and 2-unit cantilever FPD models caused milder stress distribution and magnitude in the region of connectors among the splinted teeth. Conclusions. The stress field developed within the connectors of the cantilever segment is independent of the osseous level. The stress field within the connectors among splinted teeth depends on the osseous support and both the presence and length of the cantilever segment. Furthermore, this Study indicates that adding a cantilever segment has a positive effect on the stress behavior of the splinted teeth connectors in situations of reduced osseous support. Prosthet Dent 2009;101:54-65)	en
heal.publisher	MOSBY-ELSEVIER	en
heal.journalName	JOURNAL OF PROSTHETIC DENTISTRY	en
dc.identifier.doi	10.1016/S0022-3913(08)60292-9	en
dc.identifier.isi	ISI:000262620100008	en
dc.identifier.volume	101	en
dc.identifier.issue	1	en
dc.identifier.spage	54	en
dc.identifier.epage	65	en