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Bending moments of zirconia and titanium implant abutments supporting all-ceramic crowns after aging.
Clin Oral Implants Res. 2014 Jan; 25(1):74-81.CO

Abstract

OBJECTIVES

To test the fracture load and fracture patterns of zirconia abutments restored with all-ceramic crowns after fatigue loading, exhibiting internal and external implant-abutment connections as compared to restored and internally fixed titanium abutments.

MATERIALS AND METHODS

A master abutment was used for the customization of 5 groups of zirconia abutments to a similar shape (test). The groups differed according to their implant-abutment connections: one-piece internal connection (BL; Straumann Bonelevel), two-piece internal connection (RS; Nobel Biocare ReplaceSelect), external connection (B; Branemark MkIII), two-piece internal connection (SP, Straumann StandardPlus) and one-piece internal connection (A; Astra Tech AB OsseoSpeed). Titanium abutments with internal implant-abutment connection (T; Straumann Bonelevel) served as control group. In each group, 12 abutments were fabricated, mounted to the respective implants and restored with glass-ceramic crowns. All samples were embedded in acrylic holders (ISO-Norm 14801). After aging by means of thermocycling in a chewing simulator, static load was applied until failure (ISO-Norm 14801). Fracture load was analyzed by calculating the bending moments. Values of all groups were compared with one-way ANOVA followed by Scheffé post hoc test (P-value<0.05). Failure mode was analyzed descriptively.

RESULTS

The mean bending moments were 464.9 ± 106.6 N cm (BL), 581.8 ± 172.8 N cm (RS), 556.7 ± 128.4 N cm (B), 605.4 ± 54.7 N cm (SP), 216.4 ± 90.0 N cm (A) and 1042.0 ± 86.8 N cm (T). No difference of mean bending moments was found between groups BL, RS, B and SP. Test group A exhibited significantly lower mean bending moment than the other test groups. Control group T had significantly higher bending moments than all test groups. Failure due to fracture of the abutment and/or crown occurred in the test groups. In groups BL and A, fractures were located in the internal part of the connection, whereas in groups RS and SP, a partial deformation of the implant components occurred and cracks and fractures of the zirconia abutment were detected.

CONCLUSION

The differently connected zirconia abutments exhibited similar bending moments with the exception of one group. Hence, the type of connection only had a minor effect on the stability of restored zirconia abutments. In general, restored titanium abutments exhibited the highest bending moments.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Mühlemann S
Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.
Truninger TC
No affiliation info available
Stawarczyk B
No affiliation info available
Hämmerle CH
No affiliation info available
Sailer I
No affiliation info available

MeSH

CeramicsCrownsDental AbutmentsDental Implant-Abutment DesignDental Implants, Single-ToothDental Restoration FailureDental Stress AnalysisIn Vitro TechniquesMasticationMaterials TestingTitaniumZirconium

Pub Type(s)

Journal Article

Language

eng

PubMed ID

23735182

Citation

Mühlemann, Sven, et al. "Bending Moments of Zirconia and Titanium Implant Abutments Supporting All-ceramic Crowns After Aging." Clinical Oral Implants Research, vol. 25, no. 1, 2014, pp. 74-81.
Mühlemann S, Truninger TC, Stawarczyk B, et al. Bending moments of zirconia and titanium implant abutments supporting all-ceramic crowns after aging. Clin Oral Implants Res. 2014;25(1):74-81.
Mühlemann, S., Truninger, T. C., Stawarczyk, B., Hämmerle, C. H., & Sailer, I. (2014). Bending moments of zirconia and titanium implant abutments supporting all-ceramic crowns after aging. Clinical Oral Implants Research, 25(1), 74-81. https://doi.org/10.1111/clr.12192
Mühlemann S, et al. Bending Moments of Zirconia and Titanium Implant Abutments Supporting All-ceramic Crowns After Aging. Clin Oral Implants Res. 2014;25(1):74-81. PubMed PMID: 23735182.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bending moments of zirconia and titanium implant abutments supporting all-ceramic crowns after aging. AU - Mühlemann,Sven, AU - Truninger,Thomas C, AU - Stawarczyk,Bogna, AU - Hämmerle,Christoph H F, AU - Sailer,Irena, Y1 - 2013/06/04/ PY - 2013/04/21/accepted PY - 2013/6/6/entrez PY - 2013/6/6/pubmed PY - 2015/4/9/medline KW - aging KW - all-ceramic restoration KW - bending moment KW - chewing simulation KW - implant abutments KW - implant-abutment connection KW - thermocycling KW - zirconia abutments SP - 74 EP - 81 JF - Clinical oral implants research JO - Clin Oral Implants Res VL - 25 IS - 1 N2 - OBJECTIVES: To test the fracture load and fracture patterns of zirconia abutments restored with all-ceramic crowns after fatigue loading, exhibiting internal and external implant-abutment connections as compared to restored and internally fixed titanium abutments. MATERIALS AND METHODS: A master abutment was used for the customization of 5 groups of zirconia abutments to a similar shape (test). The groups differed according to their implant-abutment connections: one-piece internal connection (BL; Straumann Bonelevel), two-piece internal connection (RS; Nobel Biocare ReplaceSelect), external connection (B; Branemark MkIII), two-piece internal connection (SP, Straumann StandardPlus) and one-piece internal connection (A; Astra Tech AB OsseoSpeed). Titanium abutments with internal implant-abutment connection (T; Straumann Bonelevel) served as control group. In each group, 12 abutments were fabricated, mounted to the respective implants and restored with glass-ceramic crowns. All samples were embedded in acrylic holders (ISO-Norm 14801). After aging by means of thermocycling in a chewing simulator, static load was applied until failure (ISO-Norm 14801). Fracture load was analyzed by calculating the bending moments. Values of all groups were compared with one-way ANOVA followed by Scheffé post hoc test (P-value<0.05). Failure mode was analyzed descriptively. RESULTS: The mean bending moments were 464.9 ± 106.6 N cm (BL), 581.8 ± 172.8 N cm (RS), 556.7 ± 128.4 N cm (B), 605.4 ± 54.7 N cm (SP), 216.4 ± 90.0 N cm (A) and 1042.0 ± 86.8 N cm (T). No difference of mean bending moments was found between groups BL, RS, B and SP. Test group A exhibited significantly lower mean bending moment than the other test groups. Control group T had significantly higher bending moments than all test groups. Failure due to fracture of the abutment and/or crown occurred in the test groups. In groups BL and A, fractures were located in the internal part of the connection, whereas in groups RS and SP, a partial deformation of the implant components occurred and cracks and fractures of the zirconia abutment were detected. CONCLUSION: The differently connected zirconia abutments exhibited similar bending moments with the exception of one group. Hence, the type of connection only had a minor effect on the stability of restored zirconia abutments. In general, restored titanium abutments exhibited the highest bending moments. SN - 1600-0501 UR - https://www.unboundmedicine.com/medline/citation/23735182/Bending_moments_of_zirconia_and_titanium_implant_abutments_supporting_all_ceramic_crowns_after_aging_ DB - PRIME DP - Unbound Medicine ER -