한국산학기술학회논문지 (Journal of the Korea Academia-Industrial cooperation Society)

  • 제18권9호
  • /
  • Pages.244-250
  • /
  • 2017
  • /
  • 1975-4701(pISSN)
  • /
  • 2288-4688(eISSN)
한국산학기술학회 (The Korea Academia-Industrial cooperation Society)
권호 표지
DOI QR코드

DOI QR Code

열처리가 Ni-Cr 합금으로 제작된 하부구조물의 변연 및 내면 간격에 미치는 영향

Effect of heat treatment of core fabricated by Ni-Cr alloy on marginal and internal fit

  • 김재홍 (동남보건대학교 치기공과) ;
  • 김기백 (대전보건대학교 치기공(학)과) ;
  • 정재관 (대전보건대학교 치기공(학)과)
  • Kim, Jae-Hong (Department of Dental Technology, Dongnam Health University) ;
  • Kim, Ki-Baek (Department of Dental Lab Technology, Daejeon Health Institute of Technology) ;
  • Jung, Jae-Kwan (Department of Dental Lab Technology, Daejeon Health Institute of Technology)
  • 투고 : 2017.05.30
  • 심사 : 2017.09.15
  • 발행 : 2017.09.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

보철물의 완성도를 평가할 수 있는 요소는 여러 가지가 있으나, 그 중 가장 중요한 하나는 보철물의 적합도이다. 합금은 기계적, 물리적 성질 그리고 연마성 개선을 위해 연화열처리나 경화열처리 과정을 거치는데, 이때의 열처리 방법이 Ni-Cr 합금 core의 변연 및 내면 간격에 어떠한 영향을 미치는지 알아보고자 한다. 실험을 위해 하악 좌측 대구치가 지대치인 석고 모형 30개를 제작하고 dipping법을 이용하여, 3 group(A, B, C)으로 나누어 group당 10개, 총 30개의 Ni-Cr 합금 core를 제작 하였다. 이들을 열처리를 하지 않은 것과 연화, 경화 열처리 방법으로 열처리함에 따라 적합도를 silicone replica technique을 이용하여 측정하였다. 세 집단 간의 평균값에 유의한 차이가 있는지 알아보기 해 독립표본 t-검정으로 분석하였다(${\alpha}=0.05$). 실험 결과 변연 부위(1, 6)에서는 통계적으로 유의한 차이를 보였으나(p<0.05), 나머지 내면 부위(2, 3, 4, 5)에서는 유의한 차이를 보이지 않았다(p>0.05). 이러한 결과로 미루어 볼 때 Ni-Cr 합금은 열처리를 하지 않는 것이 적합도 측면에서 나을 것으로 사료된다. 이에 추가적인 임상적용 연구를 통해 더욱 심도 있는 평가되어야 할 것으로 판단된다.

The most important aspect determining the completeness of aprosthesis is itsmarginal and internal fit. Alloysare processed using a softening/hardening heat treatment methodin order to improve their mechanical, physical properties and polishing properties. To examinehow the heat treatment method affects the marginal and internal fit of the Ni-Cr alloy core,thirty dental stone models of the abutment of the mandibular left molar were manufactured.The Ni-Cr alloy coreswere manufactured by the dipping method for the experiment and dividedinto three groups; A for no heat treatment, B for softening heat treatment and C for hardening heat treatment. The marginal and internal fitsof all of the groups were measured by the silicone replica technique. A statistical analysis was performed using one-way ANOVA(${\alpha}=0.05$) in order to examine whether there is a significant difference in the average values of the marginal and internal fits among the three groups and it was found that themarginal fits (1, 6) were significantly different (p<0.05), but the internal fits (2, 3, 4, 5) were not significantly different (p>0.05). These results show that Ni-Cr alloys should not be processed bythe heat treatmentmethod.However, they need to be confirmed in further clinical application studies.

키워드

참고문헌

  1. Y. S. Kim, B. H. Jun, "A study of comparative the mastication capability and life quality of elderly people using dentures or implants", J Korean Soc Dent Hyg, vol. 11, no. 5, pp. 629-636, 2011.
  2. W. J. Shin, Y. S. Jeon, K. W. Lee, H. Y. Lee, D. H. Han, "Longevity and failure analysis of fixed restorations serviced in korea", J Kor Acad Prosthodont, v.43, no. 2, pp. 158-175, 2005.
  3. Rekow ED, "High-technology innovations and limitations for restorative dentistry", Dent Clin North Am, vol. 37, no. 2, pp. 513-524, 1993.
  4. Anusavice KJ, "Phillips science of dental material", 11th ed, pp. 621-654, Philadelphia, WB Saunders, 2003.
  5. Fransson B, Oilo G, Gjeitanger R, "The fit of metal-ceramic crowns, a clinical study", Dent Mater, vol. 1, no. 5, pp. 197-199, 1985. DOI: https://doi.org/10.1016/S0109-5641(85)80019-1
  6. Yamamoto M, "Color atlas basic technique for metal ceramics", 1st ed, Tokyo, Quintessence Publishing Co, 1990.
  7. Taggart WH, "A new and accurate method of making gold inlays", Dent Cosmos, vol. 49, no. 11, pp. 117-121, 1907.
  8. Winkler S, Morris HF, Monterio JM, "Changes in mechanical prorerties and microstructure following heat treatment of a nickel-chronium base alloy", J Prosthet Dent, vol. 52, no. 6, pp. 821-827, 1984. DOI: https://doi.org/10.1016/S0022-3913(84)80012-8
  9. McLean JW, von Frauenhofer JA, "The estimation of cement film thickness by an in vivo technique ", Br Dent J, vol. 131, no. 3, pp. 107-111, 1971. DOI: https://doi.org/10.1038/sj.bdj.4802708
  10. J. H. Kim, K. B. Kim, "An evaluation validity of the silicone replica rechnique at measurement on fit of fixed dental prostheses", J Dent Hyg Sci, vol. 12, no. 6, pp. 566-571, 2012.
  11. Hamaguci H, Cacciatore a, Tueller VM, "Marginal distortion of the porcelain-bonded -to-metal complete crown : An SEM study", J Prosthet Dent, vol. 47, no. 2, pp. 146, 1982. DOI: https://doi.org/10.1016/0022-3913(82)90178-0
  12. McLean JW, "The science and art of dental ceramics", 1st ed, Chicago, Quintessence Publishing Co, 1979.
  13. Morris HF, "Properties of cobalt-chromium metal ceramic alloys after heat treatment", J Prosthet Dent, vol. 63, no. 4, pp. 426-433, 1990. DOI: https://doi.org/10.1016/0022-3913(90)90232-2
  14. Wu Y, Moser JB, Jameson LM, Malone WFP, "The effect of oxidation heat treatment on porcelain bond strength in selected base metal alloys", J Prosthet Dent, vol. 66, no. 4, pp. 439-444, 1991. DOI: https://doi.org/10.1016/0022-3913(91)90502-N
  15. I. S. Kim, K. J. Min, "Comparison of dental porcelain baking methods by base-alloy and bonding strength by thermocycling", Journal of Korea Academia-Industrial cooperation Society, vol. 11, pp. 772-779, 2010. DOI: https://doi.org/10.5762/KAIS.2010.11.2.772
  16. W. T. Buchanan, C. W. Svare, K. A. Turner, "The effect of repeated firings and strength on marginal distortion in two ceramometal systems", J Prosthet Dent, vol. 45, no. 5, pp. 502-506, 1981. DOI: https://doi.org/10.1016/0022-3913(81)90035-4
  17. S. D. Campbell, L. Pelletier, "Thermal cycling distortion of metal ceramics: part I -metal collar width", J Prosthet Dent, vol. 67, no. 5, pp. 604-608, 1992.