EFFECT OF VARYING THE VERTICAL DIMENSION OF CONNECTORS OF CANTILEVER CROSS-ARCH FIXED DENTAL PROSTHESES IN PATIENTS WITH SEVERELY REDUCED OSSEOUS SUPPORT: A THREE-DIMENSIONAL FINITE ELEMENT ANALYSIS

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	2014-03-01T01:33:19Z
dc.date.available	2014-03-01T01:33:19Z
dc.date.issued	2010	en
dc.identifier.issn	0022-3913	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20371
dc.subject	Finite Element Analysis	en
dc.subject	Three Dimensional	en
dc.subject.classification	Dentistry, Oral Surgery & Medicine	en
dc.subject.other	ADVANCED PERIODONTAL DESTRUCTION	en
dc.subject.other	TERM-FOLLOW-UP	en
dc.subject.other	PARTIAL DENTURES	en
dc.subject.other	STRESS-ANALYSIS	en
dc.subject.other	OCCLUSAL FORCES	en
dc.subject.other	BONE SUPPORT	en
dc.subject.other	DESIGN	en
dc.subject.other	PROSTHODONTICS	en
dc.subject.other	COMPLICATIONS	en
dc.subject.other	EXTENSION	en
dc.title	EFFECT OF VARYING THE VERTICAL DIMENSION OF CONNECTORS OF CANTILEVER CROSS-ARCH FIXED DENTAL PROSTHESES IN PATIENTS WITH SEVERELY REDUCED OSSEOUS SUPPORT: A THREE-DIMENSIONAL FINITE ELEMENT ANALYSIS	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0022-3913(10)60012-1	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0022-3913(10)60012-1	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Statement of problem. Inadequate dimensioning of the connectors in a cantilever cross-arch fixed dental prosthesis (FDP) in perioprosthetic patients jeopardizes the prognosis of the restoration. Purpose. The purpose of this study was to investigate the effect of increasing the vertical dimension (VD) on the maximum stress developed within the connectors during the static loading of a cross-arch FDP extended as a 1- and 2-unit cantilever. Material and methods. Six digital models were developed, derived from a 3-dimensional (3-D) initial model. In the initial model, the teeth were prepared for metal ceramic restorations and splinted with a cross-arch FDP, extended as a 1- or 2-unit cantilever. The VDs of the connectors proximal to the retaining abutment were 3, 4, or 5 mm. A 3-D finite element analysis (FEA) was performed. Results. The VD increase, from 3 to 4 mm and from 3 to 5 mm, of the connector distal to the retaining abutment, for each FDP, presented a maximum stress value decrease of approximately 25% and 48%, respectively. The similar VD increase of the connector mesial to the retaining abutment, for each FDP, resulted in relatively smaller stress changes. For the 2-unit cantilever restoration, the stress decreases were approximately 9% and 15%, respectively, whereas in the 1-unit cantilever restoration, the decrease was about 10% for the 4-mm connector. Further increase of the VD to 5 mm did not relieve the peak stress. The highest stress value was measured on the 3-mm connector distal to the retaining abutment in the 2-unit cantilever restoration. Despite the VD increase, the connectors proximal to the retaining abutment still developed the highest stress values of all the connectors for every model. Conclusions. The connector with the highest risk of failure is the 3-mm connector distal to the retaining abutment of the 2-unit cantilever restoration. Increasing the vertical dimension is beneficial for the connector distal to the retaining abutment, while the resultant stress changes are not substantial for the connectors mesial to the retaining abutment. (J Prosthet Dent 2010;103:91-100)	en
heal.publisher	MOSBY-ELSEVIER	en
heal.journalName	JOURNAL OF PROSTHETIC DENTISTRY	en
dc.identifier.doi	10.1016/S0022-3913(10)60012-1	en
dc.identifier.isi	ISI:000275829700003	en
dc.identifier.volume	103	en
dc.identifier.issue	2	en
dc.identifier.spage	91	en
dc.identifier.epage	100	en