Email Alert | RSS

Journal of Peking University (Health Sciences) ›› 2021, Vol. 53 ›› Issue (2): 402-405. doi: 10.19723/j.issn.1671-167X.2021.02.028

Previous Articles     Next Articles

Evaluation of fracture strength of two kinds of zirconia all-ceramic crowns with different edge compensation angles

YANG Xin1,LI Rong2,YE Hong-qiang1,CHEN Hu2,WANG Yong2,ZHOU Yong-sheng1,Δ(),SUN Yu-chun2,Δ()   

  1. 1. Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
    2. Center for Digital Dentistry, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
  • Received:2019-02-22 Online:2021-04-18 Published:2021-04-21
  • Contact: Yong-sheng ZHOU,Yu-chun SUN E-mail:kqzhouysh@hsc.pku.edu.cn;polarshining@163.com
  • Supported by:
    National Key Research and Development Program of China(2018YFB1106900);National Key Research and Development Program of China(2018YFB1107200);Capital’s Funds for Health Improvement and Research(2018-2-4103)

RICH HTML

   

PDF (PC)

Abstract:

Objective: To evaluate the effects of different edge compensation angles on the fracture strength of multilayer zirconia all-ceramic crowns and traditional uniform zirconia all-ceramic crowns. Methods: The resin tooth preparation specimen of the mandibular first molar with a knife-edge was fabricated. A 3D digital model of the specimen was obtained by scanning it with a 3D dental model scanner. The 3D digital model was imported into computer aided design (CAD) software, and three 3D digital models of the full crown with the same surface shape are designed with the edge compensation angles of 30°, 45° and 60°, respectively. Then, the designed 3D digital model is imported into computer aided manufacturing (CAM) software. Three kinds of multilayer and homogeneous zirconia all-porcelain crowns with different edge compensation angles were fabricated,10 each for a total of 60. The fracture load of each crown was measured under the electronic universal testing machine. Results: Fracture load of multilayer and uniform zirconia all-ceramic crowns, (4 322.86±610.07) N and (5 914.12±596.80) N in the 30° group, (5 264.82±883.76) N and (5 220.83±563.38) N in the 45° group and (4 900.42±345.41) N and (5 050.22±560.24) N in the 60° group, respectively. The fracture load of multi-layer zirconia all-ceramic crowns in the 30° group was significantly lower than that of homogeneous zirconia all-ceramic crowns(P<0.05); there was no statistical significance in 45° group and 60° group(P>0.05). In the multi-layer zirconia all-ceramic crowns: the fracture load of the 30° group was significantly lower than that of the 45° group (P<0.05); there was no significant difference between the 30° group and the 60° group, the 45° group and the 60° group (P>0.05).In uniform zirconia full crown group: the 30° group was higher than the 45° group, the 30° group was higher than the 60° group (P<0.05), and there was no significant difference between the 45° group and the 60° group (P>0.05). Conclusion: The fracture loads of three kinds of uniform and multilayer zirconia all ceramic crowns with different edge compensation angles can meet the clinical requirements. A smaller edge compensation angle is recommended when using traditional zirconia all-ceramic crowns, while 45° is recommended when using multi-layer zirconia all-ceramic crowns.

Key words: Zirconia all-ceramic crown, Knife-edge, Edge compensation angle, Fracture strength

CLC Number: 

  • R783.4

Figure 1

Resin tooth preparation"

Figure 2

Schematic diagram of edge compensation angle a, horizontal edge of the crown; b, tilted edge of the crown; α, compensation angle of the edge of the crown."

Figure 3

CAD/CAM design and processing of three different crown edge A, B, C, CAD software design completed; D, E, F, completion of CAM processing, which is consistent with the design perspective. CAD, computer aided design; CAM, computer aided manufacturing."

Figure 4

Fracture strength test"

[1] 张富强. 口腔修复材料氧化锆陶瓷的研究与应用[J]. 上海交通大学学报(医学版), 2006,26(10):1081-1084.
[2] Choi YJ, Razzoog ME. Masking ability of zirconia with and without veneering porcelain[J]. J Prosthet Dent, 2013,22(2):98-104.
[3] Vichi A, Louca C, Corciolani G, et al. Color related to ceramic and zirconia restorations: A review[J]. Dent Mater, 2011,27(1):97-108.
pmid: 21122905
[4] Spies BC, Balmer M, Jung RE, et al. All-ceramic, bi-layered crowns supported by zirconia implants: Three-year results of a prospective multicenter study[J]. J Dent, 2017,67:58-65.
pmid: 28939484
[5] Pihlaja J, Näpänkangas R, Raustia A. Outcome of zirconia partial fixed dental prostheses made by predoctoral dental students: A clinical retrospective study after 3 to 7 years of clinical service[J]. J Prosthet Dent, 2016,116(1):40-46.
pmid: 26868964
[6] Chai H, Lee JW, Mieleszko AJ, et al. On the interfacial fracture of porcelain/zirconia and graded zirconia dental structures[J]. Acta Biomater, 2014,10(8):3756-3761.
pmid: 24769152
[7] 冯海兰, 徐军. 口腔修复学[M]. 北京: 北京大学医学出版社, 2013: 71-72.
[8] 孙玉春, 李榕, 周永胜, 等. 三维打印在口腔修复领域中的应用[J]. 中华口腔医学杂志, 2017,52(6):381-385.
[9] 朱黎黎. 不同牙合面厚度及锆材对全解剖式二氧化锆冠抗压强度的影响[D]. 河北:河北医科大学, 2015.
[10] Yin R, Lee MH, Bae TS, et al. Effect of finishing condition on fracture strength of monolithic zirconia crowns[J]. Dent Mater, 2019,38(2):203-210.
[11] Weigl P, Sander A, Wu Y, et al. In-vitro performance and fracture strength of thin monolithic zirconia crowns[J]. J Adv Prosthodont, 2018,10(2):79-84.
doi: 10.4047/jap.2018.10.2.79 pmid: 29713427
[12] Nakamura K, Mouhat M, Nergård JM, et al. Effect of cements on fracture resistance of monolithic zirconia crowns[J]. Acta Biomater, 2016,2(1):12-19.
[13] Zhang Y, Chai H, Lee JW, et al. Chipping resistance of graded zirconia ceramics for dental crowns[J]. J Dent Res, 2012,91(3):311-315.
pmid: 22232142
[14] Mitov G, Anastassova-Yoshida Y, Nothdurft FP, et al. Influence of the preparation design and artificial aging on the fracture resistance of monolithic zirconia crowns[J]. J Adv Prosthodont, 2016,8(1):30-36.
pmid: 26949485
[15] Comlekoglu M, Dundar M, Ozcan M, et al. Influence of cervical finish line type on the marginal adaptation of zirconia ceramic crowns[J]. Oper Dent, 2009,34(5):586-592.
doi: 10.2341/08-076-L pmid: 19830974
[16] Beuer F, Aggstaller H, Edelhoff D, et al. Effect of preparation design on the fracture resistance of zirconia crown copings[J]. Dent Mater, 2008,27(3):362-367.
[17] Poggio CE, Dosoli R, Ercoli C. A retrospective analysis of 102 zirconia single crowns with knife-edge margins[J]. J Prosthet Dent, 2012,107(5):316-321.
doi: 10.1016/S0022-3913(12)60083-3 pmid: 22546309
[18] Gibbs CH, Anusavice KJ, Young HM, et al. Maximum clenching force of patients with moderate loss of posterior tooth support: A pilot study[J]. J Prosthet Dent, 2002,88(5):498-502.
doi: 10.1067/mpr.2002.129062 pmid: 12473999
[1] SUN Yu-chun,GUO Yu-qing,CHEN Hu,DENG Ke-hui,LI Wei-wei. Independent innovation research, development and transformation of precise bionic repair technology for oral prosthesis [J]. Journal of Peking University (Health Sciences), 2022, 54(1): 7-12.
[2] LI Wen-jin,DING Qian,YUAN Fu-song,Sun Feng-bo,ZHENG Jian-qiao,BAO Rui,Zhang Lei. Effects of femtosecond laser treatment on surface characteristics and flexural strength of zirconia [J]. Journal of Peking University (Health Sciences), 2021, 53(4): 770-775.
[3] YOON Jung-min,WANG Zi-xuan,CHAN Chon-kai,SUN Yu-chun,LIU Yun-song,YE Hong-qiang,ZHOU Yong-sheng. Evaluation of methods for fitness of removable partial denture [J]. Journal of Peking University (Health Sciences), 2021, 53(2): 406-412.
[4] LI Si-yu,DUAN Xue-fei,CAO Ye. Evaluation of the effect of using ultrasonic instruments to improve the shoulder of the preparations [J]. Journal of Peking University (Health Sciences), 2021, 53(1): 88-94.
[5] GUO Dan-ni,PAN Shao-xia,HENG Mo-di,QU Jian,WEI Xiu-xia,ZHOU Yong-sheng. Comparison of the registration methods for the three-dimensional facial scans applied to the design of full-arch implant supported restoration [J]. Journal of Peking University (Health Sciences), 2021, 53(1): 83-87.
[6] LI Zheng,LIU Yu-shu,WANG Shi-min,ZHANG Rui,JIA Lu,YE Hong-qiang,HU Wen-jie,ZHAO Wen-yan,LIU Yun-song,ZHOU Yong-sheng. Application of biocopy function of temporary crown occlusal morphology in patients with severe attrition [J]. Journal of Peking University (Health Sciences), 2021, 53(1): 62-68.
[7] Jia LUO,Yu ZHANG,Hong-yan CUI,Ning ZHU,Hui-dan SHEN,Ping DI,Ye LIN. Digital workflow coupling conic retention for the immediate restoration of adjacent posterior implants [J]. Journal of Peking University (Health Sciences), 2020, 52(5): 964-970.
[8] Hao WANG,Yang LIU,Hao-chen LIU,Dong HAN,Hai-lan FENG. Detection and functional analysis of BMP2 gene mutation in patients with tooth agenesis [J]. Journal of Peking University(Health Sciences), 2019, 51(1): 9-15.
[9] Xiao-qian LIU,Qiu-wen CHEN,Hai-lan FENG,Bing WANG,Jian QU,Zhen SUN,Mo-di HENG,Shao-xia PAN. Oral hygiene maintenance of locator attachments implant overdentures in edentulous population: A longitudinal study [J]. Journal of Peking University(Health Sciences), 2019, 51(1): 136-144.
[10] Xiao-ming ZHU,Xuan QI,De-li LI,Yu-wei ZHANG,He-ping LI,Jian-guo TAN. Effect of a novel cold atmospheric plasma jet treatment with different temperatures on resin-dentin bonding [J]. Journal of Peking University(Health Sciences), 2019, 51(1): 43-48.
[11] CHAI Jin-you, LIU Jian-zhang, WANG Bing, QU Jian, SUN Zhen, GAO Wen-hui, GUO Tian-hao, FENG Hai-lan, PAN Shao-xia. Evaluation of the fabrication deviation of a kind of milling digital implant surgical guides#br# [J]. Journal of Peking University(Health Sciences), 2018, 50(5): 892-898.
[12] LI Shi-ying, LI Gang, FENG Hai-lan, PAN Shao-xia. Influence of the interforaminal arch form of edentulous mandibles on design of “All-on-4”: preliminary research based on conebeam computed tomography [J]. Journal of Peking University(Health Sciences), 2017, 49(4): 699-703.
[13] LI Yi, XU Li,ZHOU Yan-heng, OUYANG Xiang-ying, CAO Tian. Combination of periodontal, orthodontic and endodontic therapy in upper anterior teeth with hopeless prognosis and long-time follow-up: a case report [J]. Journal of Peking University(Health Sciences), 2017, 49(4): 740-744.
[14] HE Hui-ying， LIU Yang， HAN Dong， LIU Hao-chen， BAI Bao-jing, FENG Hai-lan. EDA mutation screening and phenotype analysis in patients with tooth agenesis [J]. Journal of Peking University(Health Sciences), 2016, 48(4): 686-691.
[15] WANG Ying, LIN Ye, CHEN Bo, ZHANG Yu, DI Ping. Evaluation of alveolar ridge reconstruction and esthetic result following immediate implant [J]. Journal of Peking University(Health Sciences), 2016, 48(1): 121-125.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Journal of Peking University (Health Sciences), All Rights Reserved.
Powered by Beijing Magtech Co. Ltd