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Effects of abutment angulation and type of connection on the fracture strength of zirconia abutments
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지대주 각도와 연결방식이 지르코니아 지대주의 파절강도에 미치는 영향

논문 기본 정보

Type
Academic journal
Author
Journal
The Korean Academy Of Prosthodontics 대한치과보철학회지 대한치과보철학회지 제55권 제1호 KCI Accredited Journals
Published
2017.1
Pages
9 - 17 (9page)

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Effects of abutment angulation and type of connection on the fracture strength of zirconia abutments
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Research history (2)

2017

Fracture resistance of zirconia abutment according to connection type and abutment angulation
김호성 치의학과 2017.01 Thesis
Effects of abutment angulation and type of connection on the fracture strength of zirconia abutments
김호성 ,  CHO HYE WON 대한치과보철학회지 2017.01 Academic journal
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Abstract· Keywords

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Purpose: The purpose of this study was to evaluate the fracture strength of straight and angled zirconia abutments for internal hex and external hex implants. Materials and methods: Twenty internal hex implants and 20 external hex implants were prepared. The prefabricated straight zirconia abutments and 17-degree-angled zirconia abutments were connected to those 40 implants. The specimens were classified into 4 groups depending on the connection type and abutment angulation; internal hex implant/straight abutment, group INS; internal hex implant/angled abutment, group INA; external hex implant/straight abutment, group EXS; external hex implant/angled abutment, group EXA. All specimens were loaded at a 30-degree angle with a crosshead speed of 1 mm/min using universal testing machine. The fracture loads were analyzed using 2-way ANOVA and independent t-test (α= .05). Results: The mean fracture load for INS was 955.91 N, 933.65 N for INA, 1267.20 N for EXS, and 1405.93 N for EXA. External hex implant showed a significantly higher fracture load, as compared to internal hex implant (P < .001). No significant differences in fracture loads were observed between the straight and angled abutment in internal hex implants (P = .747) and external hex implants (P = .222). Internal hexes of abutments were fractured horizontally in internal connection implants, while lingual cervical neck portions were fractured in external connection implants. Conclusion: The zirconia abutments with external hex implants showed significantly higher fracture strength than those with internal hex implants. However there was no difference in fracture strength between the straight and 17-degree-angled zirconia abutment connected to both implant systems.
#지르코니아 #임플란트 지대주 #경사형 지대주 #임플란트 지대주 연결구조 #Zirconia #Implant abutment #Angled abutment #Implant abutment connection

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References (28)

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Al-Omari WM / 2010 / Porcelain fracture resistance of screw-retained, cement-retained, and screw-cement-retained implant-supported metal ceramic posterior crowns / J Prosthodont 19:263~273 google schola Dittmer MP / 2012 / Influence of the interface design on the yield force of the implantabutment complex before and after cyclic mechanical loading / J Prosthodont Res 56:19~24 google schola Ribeiro CG / 2011 / Resistance of three implant-abutment interfaces to fatigue testing / J Appl Oral Sci 19:413~420 google schola Freitas AC Jr / 2011 / Effect of implant connection and restoration design (screwed vs. cemented) in reliability and failure modes of anterior crowns / Eur J Oral Sci 119:323~330 google schola Karl M / 2009 / Influence of loading frequency on implant failure under cyclic fatigue conditions / Dent Mater 25:1426~1432 google schola

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