Earticle

초록

영어

Purpose: This study aimed to evaluate the translucency and masking ability of colored zirconia cores at different thicknesses and investigate the optical effects on these factors. Methods: Three zirconia brands were used for the experimental groups: Everest; Kavo, LAVA; 3M ESPE, Zirkonzahn Prettau Zirkon; and Zirkonzahn, and e.max Press (Ivoclar Vivadent AG) was used as control. Everest has five, LAVA has seven, and Zirkonzahn has five shading systems. Two types of colored e.max Press ingots were used. After pre-sintered zirconia specimens were colored using appropriate colorants, they were sintered according to manufacturers’ instructions. Overall, 285 specimens were fabricated in three thicknesses: 0.3, 0.5, and 0.7 mm. Color measurements were performed for all specimens on white, black, and C4 shade backgrounds using a spectroradiometer. The translucency parameter (TP) and masking ability were calculated for statistical analysis, and the Predictive Analytics Software program was used. Results: Overall, Zirconia cores exhibited lower TP values than e.max Press; however, Zirkonzahn showed higher TP values at certain thicknesses. Lightness decreased with darker shades; however, TP values were not significantly different. Masking ability improved with increased core thickness and darker shades. Changes in scattering and absorption coefficients also affected translucency. Conclusion: The TP value of colored zirconia cores did not consistently decrease with darker shades; however, masking ability was enhanced with increased shade darkness and core thickness. These findings indicate that the clinical use of darker shades may improve masking performance. However, further studies under clinical conditions are warranted.

목차

Abstract
INTRODUCTION
MATERIALS AND METHODS
1. Materials
2. Color measurement and treatment
3. Statistical analysis of data
RESULTS
1. Translucency parameter value by thickness and brand
2. Change in translucency parameter value by coloration
3. Pattern of change in brightness
4. Reproduction of masking ability
DISCUSSION
CONCLUSIONS
FUNDING
ACKNOWLEDGEMENTS
CONFLICT OF INTEREST
ORCID
REFERENCES

키워드

저자

• Seong-Sig Hwang [ Department of Dental Technology, Kyungdong University, Wonju, Korea ]
• Ji-ae Kim [ Dental Research Institute and Department of Dental Biomaterials Science, School of Dentistry, Seoul National University, Seoul, Korea ]
• Yong-Woon Im [ Department of Dental Technology, Kyungdong University, Wonju, Korea ]
• Jin-Soo Ahn [ Dental Research Institute and Department of Dental Biomaterials Science, School of Dentistry, Seoul National University, Seoul, Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  대한치과기공학회지 [THE JOURNAL OF KOREAN ACADEMY OF DENTAL TECHNOLOGY]

• 간기

  계간

• pISSN

  1229-3954

• eISSN

  2288-5218

• 수록기간

  1979~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 515 DDC 617