Failure analysis of high performance polymers and new generation cubic zirconia used for implant‐supported fixed, cantilevered prostheses

Abstract

BackgroundThe load‐to‐failure performance of computer‐assisted design and computer‐assisted manufacturing (CAD‐CAM) high performance polymers (HPP) and new generation cubic zirconia (Zir) material when used with titanium (Ti) bases for implant‐supported fixed prostheses with cantilevers is unknown.PurposeTo evaluate the load‐to‐failure performance of different CAD‐CAM fabricated HPP and a new generation cubic Zir in a cantilevered situation when used with Ti bases.Materials and MethodsFive specimens with a Ti base and five specimens without Ti bases were fabricated from seven different CAD‐CAM HPPs (100% PEEK [J and CP], 80% PEEK with 20% filler [BRE], 80% PEKK with 20% filler [PK], ceramic reinforced PEEK [ZZ], interlaced fiberglass and resin [TR], fiber‐composite material [T]). Five specimens with Ti base and two specimens without Ti base were prepared from a new generation cubic Zir (DD) and a 3Y‐TZP Zir (FZR) as the control group (N = 84). All specimens (8 × 7 × 30 mm) were stabilized using a clamp attached to the first 20 mm of each specimen for a 10 mm cantilever. Static loading was applied vertically on the cantilever and the maximum load‐to‐failure values (N) were analyzed using a two‐way ANOVA and t‐test (alpha = .05).ResultsHPP and Zir specimens without Ti bases had significantly higher load‐to‐failure values than Ti based ones in all groups (P < .05). PK with Ti base had significantly lower load‐to‐failure values than other materials (P < .001). FZR showed significantly higher load‐to‐failure values than all HPPs and DD (P < .001).ConclusionsLoad‐to‐failure values of HPPs and Zir were lower when Ti bases were used. New generation cubic Zir and all HPPs had lower load‐to‐failure values than FZR. HPPs performance varied among tested materials. PEKK with Ti base had the lowest load‐to‐failure value.

The use of PEEK in digital prosthodontics: A narrative review

“…On the other hand, Preis et al in a fatigue testing of PEEK molar crowns either bonded or screw-retained found lower fracture resistance than zirconia ones, while a total failure rate was observed for PEEK frameworks veneered with composite paste used for screw-retained restorations, indicating that the insertion of screw channels weakened the PEEK frameworks [1]. Moreover, zirconia implant-supported frameworks with cantilevers showed higher fracture resistance than PEEK-based materials [34].…”

Stress Concentration in Open Hole Laminate Composites Under Bending: Potential Application in Dental Implant Prosthesis

“…The use of a PEEK resin composite associated with glass fibers (Trinia ®, Shofu, Dental Corporation, San Marcos, CA, USA) as prosthetic infrastructure has been proposed, providing strength of 254.2 (22.3) MPa and an elastic modulus of 7.2 (3.5) GPa obtained in three-point-bending tests 19 . This material has been applied to fixed prostheses on implants by several authors with promising results [73][74][75] . The present investigation enabled to affirm that carbon/epoxy composites meet that requirement in all stress concentration condition, however, in the carbon/PPS needs further investigation as it has lower flexural properties, but it may overcome other disadvantage such as sudden failure presented in carbon/ epoxy composites.…”

Load to Failure of High-Density Polymers for Implant-Supported Fixed Cantilevered Prostheses with Titanium Bases

“…Similar previous studies with same design were considered when determining the sample size and specimen fabrication. 13,29 In previously published studies done by the same group, using the identical test set up in this study and 5 specimens per group allowed the detection of significant differences amongst groups. Specimens were fabricated integrating a Ti base standard tessellation language (STL) in the design for a Ti base (Dmaster Dental Implants) to be later cemented.…”