Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (34): 5433-5437.doi: 10.3969/j.issn.2095-4344.2015.34.005

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Clinical trial of collapsed repair and in vitro tensile strength test 

Wang Xing1, Qi Lu2, Gu Zhen-yu3, He Hui-yu1   

  1. 1Department of Prosthodontics, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China; Department of Stomatology, Second Affiliated Hospital of Xinjiang Medical University, Urumqi 830063, Xinjiang Uygur Autonomous Region, China; 3Department of Stomatology, Hospital of Xinjiang Production & Construction Corps, Urumqi 830011, Xinjiang Uygur Autonomous Region, China
  • Online:2015-08-20 Published:2015-08-20
  • About author:Wang Xing, Master, Attending physician, Department of Prosthodontics, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China

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Abstract:

BACKGROUND: Currently, there are many studies on collapsed repair, but a systematic and horizontal comparison is not reported yet.

OBJECTIVE: To compare the effect of conventional resin adhesive, resin adhesive+silane coupling agent and adjacent surface open part of the crown on collapsed repair through clinical trial and in vitro experiment.

METHODS: (1) Clinical trial: 90 patients with porcelain collapse were randomized into three groups, and respectively treated with conventional resin adhesive, resin adhesive+silane coupling agent and adjacent surface open part of the crown. Success rate was measured and compared among three groups at 1 year after repair. (2) In vitro test: Twenty test specimens were equally divided into two groups, and treated with conventional resin adhesive and resin adhesive+silane coupling agent, respectively. Then, shear strength was detected in the two groups. Twenty double-crown specimens were equally divided into four groups. The first three groups were treated with sand blasting, silane coupling agent and their combination treatment, respectively; the rest group had no treatment (control group). After repair, the tensile strength of each specimen was detected.

RESULTS AND CONCLUSION: The success rate of collapsed repair was 37% for conventional resin adhesive, 90% for resin adhesive+silane coupling agent and 100% for adjacent surface open part of the crown. The shear strength was (13.978±0.343) MPa for the conventional resin adhesive and (10.058±0.64) MPa for resin adhesive+silane coupling agent, and there was a significant difference between two methods (P < 0.01). The tensile strength was (0.68±0.04) kN in the control group, (1.00±0.02) kN in the sand blasting group, (1.31±0.08) kN in silane coupling agent group, and (1.09±0.04) kN in the combination group, and there was a significant differences between groups (P < 0.01). Experimental results show that the silane coupling agent+resin adhesive treatment and adjacent surface open part of the crown are superior to conventional resin adhesive.

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

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