The effect of surface texture on the retention of single implant-supported crowns cemented on wide-platform abutments
| Autor: | Rosemary Sadami Arai Shinkai, Regenio Mahfuz Herbstrih Segundo, Luis Gustavo Rabello Drummond, Hugo Mitsuo Silva Oshima |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Revista Odonto Ciência; Vol. 32 No. 4 (2017); 169-173 Revista Odonto Ciência; v. 32 n. 4 (2017); 169-173 Revista odonto ciência Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS) instacron:PUC_RS |
| ISSN: | 1980-6523 0102-9460 |
| DOI: | 10.15448/1980-6523.2017.4 |
| Popis: | OBJECTIVE: This in vitro study evaluated the retention of copings cemented with a provisional cement and a permanent cement on wide-platform short abutments with different surface texture.METHODS: Two wide-platform abutments (height 4.0 mm) with machined (original) or modified surface (air-blasted with 50-µm aluminum oxide) were connected to two implant replicas under torque of 35 N.cm. Ten copings were cast in Cr-Co alloy from calcinable cylinders. Each coping was luted on the abutment under an axial force of 5 kg for 10 min, and the specimen was stored in a humid environment at 37°C for 20 h. After mechanical cycling simulating masticatory fatigue for 7 days (5754 cycles, 60 cycles/min, 200 N, 37°C), the specimens were subjected to a uniaxial tensile test at 0.5 cm/min, and the maximum retention strength (N) was recorded. After testing, the surfaces were cleaned, and the procedures were repeated for each coping in the experimental group. Data were analyzed by Student t test for paired samples. RESULTS: For the temporary cement, the mean retention (SD) was 36.1 (10.7) N for the machined surface and 49.6 (2.7) N for the blasted surface (P=0.004) (37% increase). For the zinc phosphate cement, the values were 292.0 (89.8) N and 440.6 (48.1) N, (P |
| Databáze: | OpenAIRE |
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