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가교제의 첨가가 4-META/MMA-TBB 레진의 굴곡성질과 인장접착강도에 미치는 영향
임재승(Jae-Seung Im),김교한(Kyo-Han Kim),권태엽(Tae-Yub Kwon) 대한치과재료학회 2012 대한치과재료학회지 Vol.39 No.3
The purpose of this study was to examine the effect of the addition of two crosslinking agent ethylene glycol dimethacrylate (EGDMA), triethyleneglycol dimethacrylate (TEGDMA) to 4-META/MMA-TBB resin (Super-Bond C&B, Sun Medical) on the flexural properties and tensile bond strength to titanium. Experimental resins containing 1, 2, 5, and 10 wt% containing EGDMA or TEGDMA were prepared. Flexural test specimens were made according to the ISO 4049 standard. The tensile bond strengths of the experimental resins to titanium were measured before and after thermocycling (2000 times). The flexural modulus increased in resins containing 1, 2, and 5 wt% EGDMA and 1 and 2 wt% TEGDMA, when compared to control (P<0.05). The flexural strengths increased only in resins containing 1 and 2 wt% EGDMA and 2 wt% TEGDMA. In the case of tensile bond strength before thermocycling, 5 wt% EGDMA- and 1 wt% TEGDMA-containing resins increased the values significantly (P<0.05). At 2000 thermocycles, 5wt% EGDMA- and 2 wt% TEGDMA-containing groups showed significant increases in the value when compared to control (P<0.05).
BLT 임플란트 (Roxolid)의 기계적인 강도에 대한 유의적인 고찰
임재승(Jae-Seung Im),여신일(Shinil Yeo),박근오(Keun Oh Park),이정희(Jung-Hee Lee),권태엽(Tae-Yub Kwon) 대한치과재료학회 2018 대한치과재료학회지 Vol.45 No.1
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 Students 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.