Influence of sintering technique on fracture load of monolithic zirconia with different thicknesses

Journal of Osseointegration

article

S. A. Mahmoud¹  S.M. Kanaan² 

[1] BSc dental prosthodontic department;Dental prosthetic

关键词: Zirconia;    Layer thickness;    Fracture load;    High-speedsintering.;   

DOI  :  10.23805/JO.2022.14.3

学科分类：社会科学、人文和艺术（综合）

来源: Ariesdue

【 摘 要 】

Aim This work aims to investigate and measure  different fracture loads produced by two different sintering procedures (high-speed  and traditional sintering) on different thicknesses of zirconia crowns.Materials and methods Zirconia blanks (Vita/zahnfabrik diameter 98 mm x 12 mm height, Germany) were used to fabricate 48 molar crowns (N = 48, divided into 2 groups of 24) which were constructed in three different occlusal thicknesses (1.5, 2.0, 2.5 mm) using two methods: conventional sintering (1,450°C) and high-speed sintering (1,550°C). Crowns were bonded to  CoCr die. Fracture load was tested after all crowns were underwent 5,000 timesthermocycling test  (between 5°C and 55°C).Result ANOVA analysis has been used to compare the fracture load of different groups, and results showed that high-speed sintering required significantly more force and load than conventional sintering (p-values 0.001).Conclusion Time and money-saving technology showedencouraging  results that with zirconia crowns resulted in high-speed sintering and greater fracture loading values than the control group (conventional technique); also,  fracture load increased with  increase of thickness of zirconia crown. Therefore, it is recommended to increase occlusal thickness with high-speed sintering to obtain better resistance to chewing force.

【 授权许可】

CC BY-NC-ND