베릴륨이 함유되지 않은 니켈-크롬 합금 코어와 코발트-크롬 합금 코어의 적합도 비교평가
Comparison of the marginal and internal fit of cores fabricated by Ni-Cr alloy(non-beryllium) and Co-Cr alloy
김기백, 김재홍, 김웅철, 김지환,
소속 상세정보
김기백 ( Kim Ki-Baek ) - 고려대학교 대학원 보건과학과
김재홍 ( Kim Jae-Hong ) - 고려대학교 대학원 보건과학과
김웅철 ( Kim Woong-Chul ) - 고려대학교 대학원 보건과학과
김지환 ( Kim Ji-Hwan ) - 고려대학교 대학원 보건과학과
KMID : 0362120120340040353
Abstract
Purpose: The aim of this study measured and compared the marginal and internal fit of metal cores with two base metal alloy (Ni-Cr alloy(non-beryllium), Co-Cr alloy).
Methods: Maxillary right first molar abutment fabricated by titanium was prepared for this study. Impressions(10ea) were made from titanium model, and study models were poured with improved dental stone. Wax cores of twenty were prepared for burn-out and casting. Ten wax cores cast Ni-Cr alloy(non-Be), and finally ten cast Co-Cr alloy. Marginal and internal fit of cores was evaluated using silicone replica technique and digital microscope(x160). The data were statistically analyzed with the independent samples t-test ( <.05).
Results: Mean(standard deviation, SD) marginal and internal fit total size of Ni-Cr alloy(non-Be) group was 73.3(14.4) and of Co-Cr alloy group 65.6(17.4) . The marginal and internal fit total size of Ni-Cr alloy group(non-Be) was statistically significantly greater than that of Co-Cr alloy group (P=.004).
Conclusion: Co-Cr alloy cores in this study had a better marginal fit than Ni-Cr alloy(non-Be) cores.
키워드
Base metal alloy; Co-Cr; Marginal fit; Ni-Cr
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