치과용 생체보철물 제작을 위한 TZP 단일구조 전부도재관 블럭의 물성과 저온열화 후 굴곡강도에 관한 연구
The research about the physical properties and flexural strength changed by Low Temperature Degradation of TZP monolithic all-ceramic crown block to make bio-prosthetic dentistry
이종화, 박천만, 송재상, 임시덕, 김재도, 김병식, 황인환, 이성국,
소속 상세정보
이종화 ( Lee Jong-Hwa ) - 계명대학교 공중보건학과
박천만 ( Park Chun-Man ) - 계명대학교 공중보건학과
송재상 ( Song Jae-Sang ) - 김천대학교 치기공과
임시덕 ( Lim Si-Duk ) - 수성대학교 치기공과
김재도 ( Kim Jae-Do ) - 수성대학교 치기공과
김병식 ( Kim Byung-Sik ) - 수성대학교 치기공과
황인환 ( Hwang In-Whan ) - (주)비케이 메멘트
이성국 ( Lee Sung-Kuk ) - 동원치과기공소
KMID : 0362120120340020083
Abstract
Purpose: The objective of this study is to find out physical properties and the flexural strength changed by the low
temperature degradation of the block which is needed to make bio-prosthetic dentistry which is better than feldspar affiliated ceramic made by building up ceramic powder and also to apply this to the clinical use of zirconia monolithic all-ceramic crown.
Methods: Flexural strength of each sample was evaluated before and after the Low Temperature Degradation ,and physical properties of the Tetra Zirconia Block containing 3mol % was evaluated as well. The average and standard deviation of each experimental group were came out of the evaluation. Statistical package for social science 18.0 was used for statistics.
Results: The average density of the monolithic all-ceramic crown was 6.0280 0.0147g/cm, the relative density was 99.01 %. When the sample was sintered at 1480 the diameter of average particle was 396.62 33.71nm. All the samples had no monolithic peak after XRD evaluation but only had tetragonal peak. There were statistically significant differences in the result of flexural strength of the samples evaluated after and before the low temperature degradation, the flexural strength before the low temperature degradation was 1747.40 ßA, at the temperature of 130 the flexural strength after the low temperature degradation was 1063.99 (p<0.001). There was statistically significant difference in the result of strength of 1020.07 after the low temperature degradation at the temperature of 200 (p<0.001).
Conclusion: The block which was made for this evaluation possesses such an excellent strength among dental
restorative materials that it is thought to have no problems to use for tetragonal zirconia polycrystal.
키워드
flexural strength; monolithic all-ceramic crown; TZP; zirconia block
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