혼합 방법과 보관 시간이 알지네이트 인상재의 체적 안정성에 미치는 효과
Effect of mixing method and storage time on dimensional stability of alginate impressions materials
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목적: 전통적인 알지네이트와 체적 안정성을 개선한 두 종류의 extended-pour 알지네이트에서 혼합 방법과 보관 시간에 따른 체적 안정성 차이를 평가하고자 한다. 재료 및 방법: 금속 주모형을 제작하여 한 종류의 전통적인 알지네이트와 두 종류의 extended-pour 알지네이트로 군 당 40개 씩(수동 혼합 20개, 자동혼합 20개) 인상 채득 후 즉시, 2일, 5일, 6일 보관 기간에 따라 군당 5개씩의 석고 모형 제작하였고, 3D 테이블 스캐너로 모델 스캔 후 스캔 데이터를 중첩하여 변화량을 측정하였다. 통계 분석으로 일반선형모형을 사용하였고 Tukey의 방법으로 사후검정 시행하였다 (P < .001). 결과: 혼합 방법에 따른 정확도에서는 통계학적으로 유의한 차이가 없었고 모든 군에서 즉시 석고 주입한 경우 가장 적은 부피 변화를 보였다. 2일 보관 후 석고 주입 시 군 간에 통계학적으로 유의한 차이가 나타났고, 보관 5일 후 extended-pour 알지네이트의 경우 전통적인 알지네이트에 비해 더 높은 정확도를 보였다. 전통적인 알지네이트는 2 - 5일에서, extended pour alginate의 경우 5 - 6일에서 급격한 부피 변화를 보였다. 결론: 알지네이트의 혼합 방법은 체적 안정성에 영향을 주지 않으며, extended-pour 알지네이트가 전통적인 알지네이트보다 장시간 체적 안정성이 우수하나 가급적 빠른 시간 내에 석고를 주입하는 것이 권장된다.
Abstract
Purpose: The purpose of this study is to compare the volume stability depending on the mixing methods and storage time for the conventional alginate and extended-pour alginate. Materials and methods: An arch-shaped metal model was fabricated, and one conventional alginate and two extended-pour alginates were used to take impressions using different mixing methods (hand and automatic). 120 impressions were taken (40 per each alginate) and stone models were made in accordance with the different storage times (immediate, 2 days, 5 days, and 6 days). The models were scanned with a 3D table scanner and dimensional change was measured by superimposing the scan data. Using SAS 9.4 (SAS Institute Inc., Cary, NC, USA), the general linear model and Tukey’s post hoc test was conducted for statistical analysis (P<.001). Results: There was no statistically significant difference in the dimensional accuracy between two mixing methods, and the volume change was minimum when the stone was poured immediately in all groups. Dimensional accuracy showed a statistically significant difference between groups after 2 days of storage, and extended-pour alginate showed higher accuracy after 5 days of storage comparing to conventional one. Large amounts of volume change were showed at 2 - 5 days for conventional alginate and at 5 - 6 days for extended pour alginate. Conclusion: The mixing method of alginate does not affect volume stability. Although extended-pour alginate has better volume stability than conventional alginate for a long time, it is recommended to pour stone as soon as possible.
참고문헌 (34)
- Cook W, "Alginate dental impression materials: chemistry, structure, and properties", J Biomed Mater Res, 20, pp.1~24 (1986)
- Giordano R 2nd, "Impression materials: basic properties", Gen Dent, 48, pp.510~516 (2000)
- Stevens DR, "Validity, reliability, and reproducibility of plaster vs digital study models: comparison of peer assessment rating and Bolton analysis and their constituent measurements", Am J Orthod Dentofacial Orthop, 129, pp.794~803 (2006)
- Imbery TA, "Accuracy and dimensional stability of extended-pour and conventional alginate impression materials", J Am Dent Assoc, 141, pp.32~39 (2010)
- Santoro M, "Comparison of measurements made on digital and plaster models", Am J Orthod Dentofacial Orthop, 124, pp.101~105 (2003)
- Nallamuthu N, "Dimensional changes of alginate dental impression materials", J Mater Sci Mater Med, 17, pp.1205~1210 (2006)
- Fellows CM, "Determination of bound and unbound water in dental alginate irreversible hydrocolloid by nuclear magnetic resonance spectroscopy", Dent Mater, 25, pp.486~493 (2009)
- Cohen BI, "Dimensional accuracy of three different alginate impression materials", J Prosthodont, 4, pp.195~199 (1995)
- Chen SY, "Factors affecting the accuracy of elastometric impression materials", J Dent, 32, pp.603~609 (2004)
- Sedda M, "Effect of storage time on the accuracy of casts made from different irreversible hydrocolloids", J Contemp Dent Pract, 9, pp.59~66 (2008)
- Alcan T, "The relationship between digital model accuracy and time-dependent deformation of alginate impressions", Angle Orthod, 79, pp.30~36 (2009)
- Davies C, "Orthodontic products update. Cross infection control and elastomeric module delivery systems", Br J Orthod, 25, pp.301~303 (1998)
- Sawyer HF, "Accuracy of casts produced from alginate and hydrocolloid impression materials", J Am Dent Assoc, 93, pp.806~808 (1976)
- Todd JA, "Dimensional changes of extended-pour alginate impression materials", Am J Orthod Dentofacial Orthop, 143, pp.S55~S63 (2013)
- Wadhwa SS, "The effect of pouring time on the dimensional accuracy of casts made from different irreversible hydrocolloid impression materials", Contemp Clin Dent, 4, pp.313~318 (2013)
- Eriksson A, "Accuracy of irreversible hydrocolloids (alginates) for fixed prosthodontics. A comparison between irreversible hydrocolloid, reversible hydrocolloid, and addition silicone for use in the syringe-tray technique", Eur J Oral Sci, 106, pp.651~660 (1998)
- Kursad A, "The influence of different mixing methods on the dimensional stability and surface detail reproduction of two different brands of irreversible hydrocolloids", Eur J Gen Dent, 3, pp.17~21 (2014)
- Kaiser DA, "A study of distortion and surface hardness of improved artificial stone casts", J Prosthet Dent, 36, pp.373~381 (1976)
- Kulkarni MM, "Dimensional changes of alginate dental impression materials-An invitro study", J Clin Diagn Res, 9, pp.ZC98~ZC102 (2015)
- Cho SH, "Comparison of accuracy and reproducibility of casts made by digital and conventional methods", J Prosthet Dent, 113, pp.310~315 (2015)
- Anusavice KJ, "Phillips’ science of dental materials" (2012), Elsevier Health Sciences
- Inoue K, "Effect of mixing method on rheological properties of alginate impression materials", J Oral Rehabil, 29, pp.615~619 (2002)
- Dreesen K, "The influence of mixing methods and disinfectant on the physical properties of alginate impression materials", Eur J Orthod, 35, pp.381~387 (2013)
- Frey G, "Effect of mixing methods on mechanical properties of alginate impression materials", J Prosthodont, 14, pp.221~225 (2005)
- Dalstra M, "From alginate impressions to digital virtual models: accuracy and reproducibility", J Orthod, 36, pp.36~41 (2009)
- Torassian G, "Digital models vs plaster models using alginate and alginate substitute materials", Angle Orthod, 80, pp.474~481 (2010)
- White AJ, "Analysis of intraarch and interarch measurements from digital models with 2impression materials and a modeling process based on conebeam computed tomography", Am J Orthod Dentofacial Orthop, 137, pp.456.e1~456.e9 (2010)
- Nassar U, "Dimensional accuracy of 2 irreversible hydrocolloid alternative impression materials with immediate and delayed pouring", J Can Dent Assoc, 78, pp.c2~ (2012)
- Walker MP, "Dimensional change over time of extended-storage alginate impression materials", Angle Orthod, 80, pp.1110~1115 (2010)
- Gümüş HÖ, "The effect of pouring time on the dimensional stability of casts made from conventional and extended-pour irreversible hydrocolloids by 3D modelling", J Dent Sci, 10, pp.275~281 (2015)
- Coleman RM, "Dimensional stability of irreversible hydrocolloid impression material", Am J Orthod, 75, pp.438~446 (1979)
- "Revised American Dental Association Specification no.19 for Non-Aqueous, Elastomeric dental impression materials", J Am Dent Assoc, 94, pp.733~741 (1977)
- Ender A, "Accuracy of complete-arch dental impressions:a new method of measuring trueness and precision", J Prosthet Dent, 109, pp.121~128 (2013)
- Schaefer O, "Impact of digital impression techniques on the adaption of ceramic partial crowns in vitro", J Dent, 42, pp.677~683 (2014)