Department of Adhesive Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University.
Dent Mater J. 2019 Dec 1;38(6):970-980. doi: 10.4012/dmj.2018-313. Epub 2019 Aug 22.
This study examined the influences of clinical application of immediate dentin sealing (IDS) and temporary restoration (TR) on prepared abutment surfaces on the bonding of computer-aided design/computer-aided manufacturing (CAD/CAM) ceramic crown restorations after cyclic loading. Standardized abutments were prepared in 60 human mandibular premolars. Dentin surfaces of half of the specimens were sealed with adhesive and flowable composite, while those of the other half were not sealed. A half of both sealed and non-sealed specimens were restored using a temporary cement and temporary crown. Each individual CAD/CAM ceramic crown was fabricated and cemented to an individual abutment. The restored specimens were subjected to cyclic loading, and the micro tensile bond strengths (μ-TBS) were measured. IDS contributed to an increase in the bond strength, whereas TR did not affect the bond strength. IDS restoration without TR yielded the maximum bond reliability in achieve specific μ-TBS values for the restoration and ensuring durability against debonding.
本研究探讨了即刻牙本质封闭（IDS）和临时修复（TR）在循环加载后对 CAD/CAM 陶瓷冠修复体预备基牙表面粘结的影响。在 60 个人类下颌前磨牙中制备标准化基牙。一半样本的牙本质表面用粘结剂和流动复合树脂封闭，另一半则不封闭。一半的封闭和未封闭样本分别用临时粘结剂和临时冠修复。每个 CAD/CAM 陶瓷冠都单独制作并粘结到各自的基牙上。对修复后的样本进行循环加载，并测量微拉伸粘结强度（μ-TBS）。IDS 有助于提高粘结强度，而 TR 则不影响粘结强度。不进行 TR 的 IDS 修复可在获得特定 μ-TBS 值和确保抗脱粘耐久性方面获得最大的粘结可靠性。
