치간 유두 소실로 인한 언더컷이 인상체의 체적 정확도에 미치는 영향
Effect of interproximal undercut on the dimensional accuracy of impression
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
목적: 본 연구의 목적은 치간 유두의 소실로 인해 치아 사이에 언더컷이 존재하는 경우 이것이 인상체의 정확도에 영향을 미치는지 알아보고자 하는 것이다. 재료 및 방법: 2종류의 부가중합형 실리콘 인상재(ExtrudeWash, ImprintTM II Quick Step Light Body)와 한 종류의 알지네이트 인상재(Cavex Impressional)로 상악 주모형의 인상을 채득하여 얻은 실험모형상의 두 점 사이의 거리를 측정하여 주모형과 비교하여 모형의 변형 정도를 측정하였다. 세 종류의 인상재에서 얻은 실험 모형들을 치간 유두가 존재하는 군과 존재하지 않는 군으로 나눠 총 6개의 군을 평가하였으며, 각 군당 6개의 모형을 측정하였다. 삼차원 광학 스캐너로 실험모형을 스캔한 후, 하나의 모형당 6개의 두 점 사이의 거리를 삼차원 디지털 계측 소프트웨어 상에서 측정하였다. 측정 거리의 변화 정도를 백분율로 계산하여 모형의 변형률을 구하였으며, 이것을 이원분산분석을 이용하여 유의수준 .05에서 분석하였다. 결과: 측정거리 6개 중 3개에서 인상재에 따라 통계적으로 유의한 차이를 보였다. 반면, 치간 유두의 존재 여부에 따른 차이는 알지네이트 인상재에서 하나의 측정 거리에서만 유의한 차이를 보였을 뿐(P=.047), 다른 측정거리들과 인상재에서는 통계적으로 유의성 있는 차이를 나타내지 않았다. 결론: 치간 유두의 소실로 인한 언더컷의 존재가 부가중합형 실리콘 인상재와 알지네이트 인상재의 체적 정확도에 미치는 영향은 크지 않았다.
Abstract
Purpose: This study evaluated the effect of loss of interproximal papilla, creating an undercut, on the accuracy of impression materials. Materials and methods: Two addition type silicone impression materials (Extrude Wash, Imprint(TM) II Quick Step Light Body) and one alginate impression material (Cavex Impressional) were used to make impressions of a maxillary master model simulating clinical conditions with or without interproximal papilla. Stone was poured in the impressions and working casts were fabricated. A total of 6 groups with 6 working casts in each group were scanned using 3-dimensional optical scanner. The accuracy of the impressions was assessed by measuring the dimensional changes (ΔI (%)) of 6 distances on working casts compared to a master model with a 3-dimensional digitizing and inspection software. The data were analyzed by two-way ANOVA (P<.05). Results: Three of 6 distances showed statistically significant differences among the impression materials. Only 1 of 6 distances in alginate impression showed a statistically significant difference between casts with and without interproximal papilla (P=.047). Conclusion: The presence of undercut due to loss of interproximal papilla did not significantly influence the dimensional accuracy of addition type silicone and alginate impression materials.
참고문헌 (29)
- Finger WJ, "Sulcus reproduction with elastomeric impression materials : a new in vitro testing method", Dent Mater, 24, pp.1655~1660 (2008)
- Shah S, "The use of a 3D laser scanner using superimpositional software to assess the accuracy of impression techniques", J Dent, 32, pp.653~658 (2004)
- Peutzfeldt A, "Accuracy of alginate and elastomeric impression materials", Scand J Dent Res, 97, pp.375~379 (1989)
- Lawson NC, "Tensile elastic recovery of elastomeric impression materials", J Prosthet Dent, 100, pp.29~33 (2008)
- Rubel BS, "Impression materials: a comparative review of impression materials most commonly used in restorative dentistry", Dent Clin North Am, 51(vi), pp.629~642 (2007)
- 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)
- Kaiser DA, "A study of distortion and surface hardness of improved artificial stone casts", J Prosthet Dent, 36, pp.373~381 (1976)
- Nandini VV, "Alginate impressions: A practical perspective", J Conserv Dent, 11, pp.37~41 (2008)
- Eames WB, "Elastomeric impression materials: effect of bulk on accuracy", J Prosthet Dent, 41, pp.304~307 (1979)
- Eames WB, "Accuracy and dimensional stability of elastomeric impression materials", J Prosthet Dent, 42, pp.159~162 (1979)
- de Araujo PA, "Effect of material bulk and undercuts on the accuracy of impression materials", J Prosthet Dent, 54, pp.791~794 (1985)
- Stober T, "Accuracy of the newly formulated vinyl siloxanether elastomeric impression material", J Prosthet Dent, 103, pp.228~239 (2010)
- Brosky ME, "Laser digitization of casts to determine the effect of tray selection and cast formation technique on accuracy", J Prosthet Dent, 87, pp.204~209 (2002)
- Goldfogel M, "Dimensional change of acrylic resin tray materials", J Prosthet Dent, 54, pp.284~286 (1985)
- Pagniano RP, "Linear dimensional change of acrylic resins used in the fabrication of custom trays", J Prosthet Dent, 47, pp.279~283 (1982)
- Davis GB, "The bonding properties of elastomer tray adhesives", J Prosthet Dent, 36, pp.278~285 (1976)
- "Revised american dental association specification no. 19 for non-aqueous, elastomeric dental impression materials", J Am Dent Assoc, 94, pp.733~741 (1977)
- Goldberg AJ, "Viscoelastic properties of silicone, polysulfide, and polyether impression materials", J Dent Res, 53, pp.1033~1039 (1974)
- Inoue K, "Viscoelastic properties of elastomeric im -pression materials. III. The elastic recovery after removal of strains applied at the setting time", J Oral Rehabil, 5, pp.323~327 (1978)
- de Araujo PA, "Viscoelastic properties of setting elastomeric impression materials", J Prosthet Dent, 54, pp.633~636 (1985)
- Donovan TE, "A review of contemporary impression materials and techniques", Dent Clin North Am, 48(vi-vii), pp.445~470 (2004)
- Klooster J, "Effects of strain rate on the behavior of elastomeric impression", J Prosthet Dent, 66, pp.292~298 (1991)
- Chai J, "Clinically relevant mechanical properties of elastomeric impression materials", Int J Prosthodont, 11, pp.219~223 (1998)
- Balkenhol M, "Influence of prolonged setting time on permanent deformation of elastomeric impression materials", J Prosthet Dent, 103, pp.288~294 (2010)
- Burke FJ, "A practice-based assessment of the handling of a fast-setting polyvinyl siloxane impression material used with the dual-arch tray technique", Quintessence Int, 32, pp.805~810 (2001)
- "Vinyl polysiloxane impression materials: a status report. Council on Dental Materials, Instruments, and Equipment", J Am Dent Assoc, 120, pp.595~600 (1990)
- Quick DC, "Use of a scanning laser threedimensional digitizer to evaluate dimensional accuracy of dental impression materials", J Prosthet Dent, 68, pp.229~235 (1992)
- DeLong R, "Factors influencing optical 3D scanning of vinyl polysiloxane impression materials", J Prosthodont, 10, pp.78~85 (2001)
- Rosenstiel SF, "Contemporary fixed prosthodontics", pp.354~379 (2001), Elsevier