Earticle

초록

영어

Purpose: This study provided the basic data for selection the zirconia block and CAM by means of marginal fitness observations, flexural strength test and hardness test. Methods: Three dental zirconia blocks(ABCera, NaturaZ, ST98) and two dental milling machines(CAD/CAM MS, DWX-50) were used in this study. Metal abutment(diameter 10 mm, height 5 mm, inclined angle 3° taper, 1 mm chamfer margin) was fabricated by Ti customized abutment, and then zirconia copings were fabricated for each ten specimens. Silicone replica technique was used to observe the marginal fitness of cross-sections with a stereomicroscope at ×50 magnification. The dental zirconia blocks was cut into 10 pieces each having a size of 25 mm × 5 mm × 1 mm, and fabricated according to the manufacturer's instructions, and flexural strength was measured using a universal testing machine. For hardness test, a micro Vickers hardness tester was used as it was in the flexural strength test. Statistical analysis was performed by one way ANOVA and post-test was performed by Scheffe test. Results: For marginal fitness of bucco-lingual axial, ZU group(59.7±10.3 ㎛) was the lowest, followed by RA, ZA, ZD, RD, RU. For marginal fitness of mesio-distal axial, ZU group(59.3±10.2 ㎛) was the lowest, followed by RA, ZA, RD, ZD, RU. One-way ANOVA showed statistically significant difference between groups(p<0.05). For flexural strength, ABCera block(718.0±57.2 MPa) was the highest, followed by NaturaZ, ST98. For hardness, ABCera block(1550.3±19.8 Hv) was the highest, followed by ST98, NaturaZ. There was no significant difference in flexural strength and hardness between blocks(p>0.05). Conclusion: Based on the results of this study, the type of dental zirconia block did influence the marginal fitness, and all dental zirconia blocks are expected to be suitable for clinical application. The highest flexural strength and hardness were ABCera block, and no statistically significant difference was observed.

목차

[Abstract]
 I. 서론
 II. 연구 방법
  1. 실험재료
  2. 변연적합도 시험
  3. 굴곡강도 시험
  4. 경도 시험
  5. 통계 분석
 III. 결과
  1. 변연적합도
  2. 굴곡강도
  3. 경도
 IV. 고찰
 V. 결론
 REFERENCES

키워드

저자

• 정인성 [ In-Sung Chung | 부산가톨릭대학교 보건과학대학 치기공학과 ]
• 전병욱 [ Byung-Wook Jeon | 부산가톨릭대학교 보건과학대학 치기공학과 ]
• 김원영 [ Won-Young Kim | 부산가톨릭대학교 보건과학대학 치기공학과 ]
• 강재민 [ Jae-Min Kang | 부산가톨릭대학교 보건과학대학 치기공학과 ] 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