State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Disease & Shaanxi Clinical Research Center for Oral Diseases, Department of Children, School of Stomatology, The Fourth Military Medical University, No.145, Changle West Road, Xincheng District, Xi'an, Shaanxi, China.
Clin Oral Investig. 2022 Jun;26(6):4419-4426. doi: 10.1007/s00784-022-04404-1. Epub 2022 Feb 14.
To compare the different restoration types of primary teeth to determine which type is appropriate for extensive caries of primary molars and incisors based on mechanical properties.
A total of 160 primary teeth were evaluated in this study, including 80 incisors and 80 molars. Each category was divided into four groups: the control group, composite resin group, pre-veneered stainless steel crown (stainless steel crown) group, and zirconia crown group. Compressive strength test and fatigue strength test were performed.
The compressive strength and fatigue strength of the composite resin group were significantly decreased compared with the control group (P < 0.05). The prefabricated crown groups showed increased fatigue and compressive strength compared with the control group, and the zirconia crown group was higher than that of the pre-veneered stainless steel crown group (P < 0.05). The zirconia crown group was less than the stainless steel crown group (P < 0.05) in the compressive strength but more than the stainless steel crown group (P < 0.05) in the fatigue strength.
The compressive strength and fatigue strength of crown restoration were superior to that of the composite resin filling. The fatigue strength of the zirconia crown also performed better than the pre-veneered stainless steel crown and the stainless steel crown. The compressive strength of the zirconia crown was less than that of the stainless steel crown.
The zirconia crown is a new restoration method for primary teeth that may be commonly applied in clinical practice.
比较不同的乳牙修复类型，根据机械性能确定哪种类型适用于乳磨牙和乳切牙的广泛龋坏。
本研究共评估了 160 颗乳牙，包括 80 颗切牙和 80 颗磨牙。每个类别分为四组：对照组、复合树脂组、预贴面不锈钢冠（不锈钢冠）组和氧化锆冠组。进行抗压强度测试和疲劳强度测试。
与对照组相比，复合树脂组的抗压强度和疲劳强度明显降低（P<0.05）。预制冠组的疲劳强度和抗压强度均高于对照组，氧化锆冠组高于预贴面不锈钢冠组（P<0.05）。氧化锆冠组的抗压强度低于不锈钢冠组（P<0.05），疲劳强度高于不锈钢冠组（P<0.05）。
冠修复的抗压强度和疲劳强度优于复合树脂填充。氧化锆冠的疲劳强度也优于预贴面不锈钢冠和不锈钢冠。氧化锆冠的抗压强度低于不锈钢冠。
氧化锆冠是一种用于乳牙的新型修复方法，可能在临床实践中得到广泛应用。
