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Comparison of fracture resistance of pressable metal ceramic custom implant abutment with a commercially fabricated CAD/CAM zirconia implant abutment.
J Prosthet Dent. 2013 Nov; 110(5):389-96.JP

Abstract

STATEMENT OF PROBLEM

The predictable nature of the hot pressing ceramic technique has several applications, but no study was identified that evaluated its application to the fabrication of custom implant abutments.

PURPOSE

The purpose of this study was to compare the fracture resistance of an experimentally designed pressable metal ceramic custom implant abutment (PR) with that of a duplicate zirconia abutment (ZR).

MATERIALS AND METHODS

Two groups of narrow platform (NP) (Nobel Replace) implant abutment specimens were fabricated (n=10). The experimental abutment (PR) had a metal substructure cast with ceramic alloy (Lodestar) and veneered with leucite pressable glass ceramic (InLine PoM). Each PR abutment was individually scanned and 10 duplicate CAD/CAM ZR abutments were fabricated for the control group. Ceramic crowns (n=20) with the average dimensions of a human lateral incisor were pressed with lithium disilicate glass ceramic (IPS e.max Press) and bonded on the abutments with a resin luting agent (Multilink Automix). The specimens were subjected to thermocycling, cyclic loading, and finally static loading to failure with a computer-controlled Universal Testing Machine. An independent t test (1 sided) determined whether the mean values of the fracture load differed significantly (α=.05) between the 2 groups.

RESULTS

No specimen failed during cyclic loading. Upon static loading, the mean (SD) load to failure was significantly higher for the PR group (525.89 [143.547] N) than for the ZR group (413.70 [35.515] N) for internal connection narrow platform bone-level implants (P=.025). Failure was initiated at the screw and internal connection level for both groups.

CONCLUSIONS

It is possible to fabricate PR abutments that are stronger than ZR abutments for Nobel Biocare internal connection NP bone-level implants. The screw and the internal connection are the weak links for both groups.

Authors+Show Affiliations

Private practice, Athens, Greece. Electronic address: protomaria@gmail.com.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24011801

Citation

Protopapadaki, Maria, et al. "Comparison of Fracture Resistance of Pressable Metal Ceramic Custom Implant Abutment With a Commercially Fabricated CAD/CAM Zirconia Implant Abutment." The Journal of Prosthetic Dentistry, vol. 110, no. 5, 2013, pp. 389-96.
Protopapadaki M, Monaco EA, Kim HI, et al. Comparison of fracture resistance of pressable metal ceramic custom implant abutment with a commercially fabricated CAD/CAM zirconia implant abutment. J Prosthet Dent. 2013;110(5):389-96.
Protopapadaki, M., Monaco, E. A., Kim, H. I., & Davis, E. L. (2013). Comparison of fracture resistance of pressable metal ceramic custom implant abutment with a commercially fabricated CAD/CAM zirconia implant abutment. The Journal of Prosthetic Dentistry, 110(5), 389-96. https://doi.org/10.1016/j.prosdent.2013.06.004
Protopapadaki M, et al. Comparison of Fracture Resistance of Pressable Metal Ceramic Custom Implant Abutment With a Commercially Fabricated CAD/CAM Zirconia Implant Abutment. J Prosthet Dent. 2013;110(5):389-96. PubMed PMID: 24011801.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of fracture resistance of pressable metal ceramic custom implant abutment with a commercially fabricated CAD/CAM zirconia implant abutment. AU - Protopapadaki,Maria, AU - Monaco,Edward A,Jr AU - Kim,Hyeong-Il, AU - Davis,Elaine L, Y1 - 2013/09/05/ PY - 2013/9/10/entrez PY - 2013/9/10/pubmed PY - 2014/9/6/medline SP - 389 EP - 96 JF - The Journal of prosthetic dentistry JO - J Prosthet Dent VL - 110 IS - 5 N2 - STATEMENT OF PROBLEM: The predictable nature of the hot pressing ceramic technique has several applications, but no study was identified that evaluated its application to the fabrication of custom implant abutments. PURPOSE: The purpose of this study was to compare the fracture resistance of an experimentally designed pressable metal ceramic custom implant abutment (PR) with that of a duplicate zirconia abutment (ZR). MATERIALS AND METHODS: Two groups of narrow platform (NP) (Nobel Replace) implant abutment specimens were fabricated (n=10). The experimental abutment (PR) had a metal substructure cast with ceramic alloy (Lodestar) and veneered with leucite pressable glass ceramic (InLine PoM). Each PR abutment was individually scanned and 10 duplicate CAD/CAM ZR abutments were fabricated for the control group. Ceramic crowns (n=20) with the average dimensions of a human lateral incisor were pressed with lithium disilicate glass ceramic (IPS e.max Press) and bonded on the abutments with a resin luting agent (Multilink Automix). The specimens were subjected to thermocycling, cyclic loading, and finally static loading to failure with a computer-controlled Universal Testing Machine. An independent t test (1 sided) determined whether the mean values of the fracture load differed significantly (α=.05) between the 2 groups. RESULTS: No specimen failed during cyclic loading. Upon static loading, the mean (SD) load to failure was significantly higher for the PR group (525.89 [143.547] N) than for the ZR group (413.70 [35.515] N) for internal connection narrow platform bone-level implants (P=.025). Failure was initiated at the screw and internal connection level for both groups. CONCLUSIONS: It is possible to fabricate PR abutments that are stronger than ZR abutments for Nobel Biocare internal connection NP bone-level implants. The screw and the internal connection are the weak links for both groups. SN - 1097-6841 UR - https://www.unboundmedicine.com/medline/citation/24011801/Comparison_of_fracture_resistance_of_pressable_metal_ceramic_custom_implant_abutment_with_a_commercially_fabricated_CAD/CAM_zirconia_implant_abutment_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-3913(13)00130-3 DB - PRIME DP - Unbound Medicine ER -