Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (8): 1421-1424.doi: 10.3969/j.issn.1673-8225.2011.08.022

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Effect of sintering temperature on mechanical properties of zirconia ceramic abutment materials

Zhang Hui-min1, Yang Jian-jun1, Lin Ying-hui2, Wang Yong-liang3, Yang Feng-li1, Wang Da-shan1, Wu Pin-lin1   

  1. 1Department of Oral and Maxillofacial Surgery, 3Department of Prosthodontics, Affiliated Hospital of Qingdao University Medical College, Qingdao   266003, Shandong Province, China; 2Department of Stomatology, Chengyang District People’s Hospital of Qingdao, Qingdao   266109, Shandong Province, China
  • Received:2010-08-19 Revised:2010-09-25 Online:2011-02-19 Published:2011-02-19
  • Contact: Yang Jian-jun, Professor, Chief physician, Master’s supervisor, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Qingdao University Medical College, Qingdao 266003, Shandong Province, China yjjqd@126.com
  • About author:Zhang Hui-min★, Studying for master’s degree, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Qingdao University Medical College, Qingdao 266003, Shandong Province, China zhanghuiminlove@126.com
  • Supported by:

    Science and Technology Project of Qingdao, No. 08-2-1-5-nsh*

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Abstract:

BACKGROUND: Different sintering temperatures and methods greatly affect the mechanical properties of zirconia materials. There are many reports about the sintering temperatures and methods of zirconia, the key to ensure good mechanical properties is to select proper sintering method and temperature. 
OBJECTIVE: To study the effects of sintering temperature and methods on mechanical properties of zirconia ceramic abutment materials.
METHODS: Nano-side zirconia powder was used in the test to prepare specimens by dry press method and cold isostatic press method. The specimens were pre-sintered at 1 080 ℃, then were turned and processed. The temperatures of second-sintering were 1 350 ℃ and 1 450 ℃ respectively. These two groups of specimens were measured on flexural strength, Vicker’s hardness and fracture toughness. All the results were compared and analyzed.
RESULTS AND CONCLUSION: All mechanical properties of specimens in 1 080 ℃/1 450 ℃ sintering groups were higher than that of 1 080 ℃/1 350 ℃ groups. When the second-time sintering temperature was 1 450 ℃, the three-point bending strength, Vicker’s hardness and fracture toughness were (858.74±94.94) MPa, (16.00±0.42) GPa and (6.96±0.55) MPa?m1/2 respectively. Zirconia specimens sintered at 1 080 ℃/1 450 ℃ have good enough mechanical properties to fit the requirement of all-ceramic abutment materials.

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