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Clinical Oral Investigations

Erschienen in:

01.07.2016 | Original Article

In vitro performance and fracture resistance of CAD/CAM-fabricated implant supported molar crowns

verfasst von: Martin Rosentritt, Sebastian Hahnel, Frank Engelhardt, Michael Behr, Verena Preis

Erschienen in: Clinical Oral Investigations | Ausgabe 4/2017

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Abstract

Objectives

The aim of this study is to investigate the performance and fracture resistance of different CAD/CAM ceramic and composite materials as implant- or tooth-supported single crowns with respect to the clinical procedure (screwed/bonded restoration).

Materials and methods

One hundred twenty crowns were fabricated on implants or human molar teeth simulating (a) chairside procedure ([CHAIR] implant crown bonded to abutment), (b) labside procedure ([LAB] abutment and implant crown bonded in laboratory, screwed chairside), and (c) reference ([TOOTH] crowns luted on human teeth). Four materials were investigated: ZLS (zirconia-reinforced lithium silicate ceramic; Celtra Duo, Degudent: polished (P)/crystallized (C)), RB (resin-based composite; Cerasmart, GC), and RIC (resin-infiltrated ceramic; Enamic, Vita-Zahnfabrik). LiS (lithiumdisilicate; Emax CAD, Ivoclar-Vivadent) served as reference. Combined thermal cycling and mechanical loading (TCML) was performed simulating a 5-year clinical situation. Fracture force was determined. Data were statistically analyzed (Kolmogorov-Smirnov test, one-way ANOVA; post hoc Bonferroni, α = 0.05).

Results

One crown of ZLS_C[LAB] (1,200,000 cycles) and RB[CHAIR] (890 cycles) failed during TCML. Fracture values varied between 977.7 N(RB) and 3070.4 N(LiS)[CHAIR], 1130.6 N(RB) and 2998.1 N(LiS)[LAB], and 1802.4 N(ZLS) and 2664.3 N(LiS)[TOOTH]. Significantly (p < 0.003) different forces were found between the materials in all three groups. ZLS_C, RIC, and RB showed significantly (p < 0.014) different values for the individual groups.

Conclusions

Partly ceramic and resin-based materials performed differently on implant or tooth abutments. The insertion of a screw channel reduced the stability for individual crown materials. Insertion of the screw channel should be performed carefully.

Clinical relevance

All restorations were in a range where clinical application seems not restricted, but insertion of a screw channel might reduce stability of individual materials.

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Titel: In vitro performance and fracture resistance of CAD/CAM-fabricated implant supported molar crowns
verfasst von: Martin Rosentritt
Sebastian Hahnel
Frank Engelhardt
Michael Behr
Verena Preis
Publikationsdatum: 01.07.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: Clinical Oral Investigations / Ausgabe 4/2017
Print ISSN: 1432-6981
Elektronische ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-016-1898-9

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In vitro performance and fracture resistance of CAD/CAM-fabricated implant supported molar crowns

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

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Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

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