Replica technique과 Triple-scan protocol을 이용한 지르코니아 전부도재관의 변연 및 내면 적합도에 관한 비교 연구
Marginal and internal fit of all ceramic crown using the replica technique and the triple-scan protocol
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목적: 본 연구는 보철물의 적합도를 계측하는 두 가지의 측정방법을 평가하기 위해 지르코니아로 전부도재관을 제작하고 replica technique과 triple-scan protocol을 이용하여 전부도재관의 변연 및 내면 적합도를 비교 연구하고자 하였다. 재료 및 방법: 타이타늄의 지대치 모형을 제작하여 20개의 지르코니아 전부도재관을 제작하였다. 제작된 지르코니아 전부도재관 10개는 replica technique을 이용해 복제하고 복제된 시편을 협설, 근원심으로 절단하여 변연 및 내면 적합도를 측정하였고, 다른 10개의 전부도재관은 triple-scan protocol 을 이용하여 협설과 근원심으로 단면을 형성하고 변연 및 내면 적합도를 계측하여 통계 분석하였다 (α= .05). 결과: 변연과 내면 적합도는 replica technique 49.86 ± 29.69 ㎛, triple-scan protocol 75.35 ± 64.73㎛로 유의한 차이가 있었고 (P < .001), 내면 적합도만을 측정한 결과 각각 58.38 ± 31.77 ㎛, 64.00 ± 46.43 ㎛로 유의한 차이가 없었다 (P > .343). 결론: Replica technique과 triple-scan protocol을 이용하여 전부도재관의 변연 및 내면 적합도를 비교 측정한 결과 triple-scan protocol에서의 변연 적합도 가 크게 측정되었고, 내면 적합도만 비교해 본 결과 통계적인 유의한 차이가 없었다.
Abstract
Purpose: This study was conducted to compare the marginal and internal fit of all ceramic crown using the replica technique and the triple-scan protocol. Materials and methods: Twenty zirconia ceramic crowns were fabricated using titanium abutment model. All crowns were divided into two groups of 10 each, depending on the replica technique and the triple-scan protocol. The internal and marginal fit of 10 zirconia ceramic crowns were measured at 17 points for each specimen using the replica technique. The other 10 ceramic crowns were measured using the triple-scan protocol. Statistical analysis was performed by t-test (α= .05). Results: The mean and standard deviation of marginal and internal fit were significantly different between the replica technique (49.86 ± 29.69 ㎛.) and triple-scan protocol (75.35 ±] 64.73 ㎛., P<.001). The mean and standard deviation of internal fit except marginal fit were 58.38 ±! 31.77 ㎛ and 64.00 ±z 46.43 ㎛., respectively (P>.343). Conclusion: There was a statistically significant difference in the marginal fit measured by the two methods. However, there was no statistically significant difference in the internal fit between the two methods.
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