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KMID : 1035320180450010077
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Korean Society for Dental Materials
2018 Volume.45 No. 1 p.77 ~ p.87
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Significant considerations of mechanical strength of BLT implant (Roxolid) : Correlation between material and product strength under static and fatigue loads
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Im Jae-Seung
Yeo Shin-Il
Park Keun-Oh
Lee Jung-Hee
Kwon Tae-Yub
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Abstract
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The purpose of this study is to correlate the material properties of TiZr alloy material (Roxolid) and the mechanical strength of the implant fixture (BLT) through the maximum compressive load test and the fatigue test. Implant samples were purchased with BLT (Roxolid, Straumann, Switzerland) and Octa1 (cold-worked, Megagen Implant, Korea) fixtures made of two materials (TiZr and cold-worked Ti Grade 4). After the maximum compressive load test, the test specimens were analyzed with a optical microscope to confirm the fracture pattern. After the fatigue test, the samples that passed 5 million cycles were analyzed for the precision fit using a scanning electron microscope. Data were analyzed using Student"s t-test (α=0.05). In the compressive load test, the small diameter (3.3 mm) implants with the same length and the common diameter (4.1 mm) implants had fracture or bending regardless of the material in both the test and control groups. The fatigue load showed the same results without significance and the gap between the fixture and abutment interface was within 10 μm in both the test and control groups in the precision fit test. There was no statistically significant difference in the maximum compressive load and fatigue test for the comparison of mechanical strength between two systems (BLT vs. Octa1) with same diameter and length, similar shapes and connections.
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KEYWORD
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TiZr alloy, Implant system, Mechanical strength
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