Effect of dentin desensitizers and cementing agents on retention of full crowns using standardized crown preparations
Effect of dentin desensitizers and cementing agents on retention of full crowns using standardized crown preparations
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DOI：
10.1016/s0022-3913(00)70042-4
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发表时间：
2000-04-01
影响因子：
4.6
通讯作者：
Pashley, DH
中科院分区：
文献类型：
--
作者：
Yim, NH;Rueggeberg, FA;Pashley, DH
问题的陈述。以往的研究在检测牙本质脱敏剂对粘结铸造冠固位强度的影响时，没有控制预备表面积，导致结果不一致。本研究控制了牙冠预备表面积并进行了评价。本研究旨在探讨不同的牙本质脱敏剂和传统的粘结剂对铸造全冠固位力的影响。用定制的缩放仪准备新鲜拔出的人磨牙用于标准化的牙冠准备（26度总会聚，4 mm轴向高度）。牙本质脱敏剂包括无（对照）、可聚合材料（All-Bond 2）和不可聚合脱敏剂（Gluma脱敏剂）。粘结剂包括磷酸锌（Fleck's）、玻璃离子（Ketac-Cem）、树脂改性玻璃离子（Fuji II）和树脂粘固剂（Panavia 21）。每种测试条件下制备12颗牙齿（共144颗牙齿）。单个铸件由基础金属合金（Rexillium III）制成。牙冠在26 ℃和100%相对湿度下储存48小时后取出！使用万能试验机以1.27 mm/min的十字头速度进行测试。根据治疗情况量化脱粘后保留在牙齿和铸件上的粘固剂的比例。统计学处理包括单因素和双因素方差分析，然后在预设α为0.05时进行Tukey-Kramer事后检验。树脂粘固剂表现出最高的固位强度，并且所有牙本质处理导致显著不同的固位值（All-Bond 2（5.68 +/- 0.70 MPa）>对照（4.67 +/- 0.48 MPa）> Gluma）。(4.12+/-0.37MPa））。树脂改性玻璃离子的固位力介于树脂粘固剂和玻璃离子组之间：All-Bond 2（3.46 +/- 0.26 MPa）> Gluma（2.81 +/- 0.15 MPa）=对照（2.96 +/- 0.18 MPa）。常规玻璃离聚物值介于Fuji Plus和磷酸锌组之间：所有粘合剂2（2.23 +/- 0.20 MPa）=对照（2.36 +/- 0.20 MPa）> Gluma（1.98 +/- 0.23 MPa）。磷酸锌具有：最低保留值：对照（1.68 +/-0.08MPa）> Gluma（0.81 +/-0.11MPa）> All-Bond 2（0.67 +/-0.14MPa）。多数人！除磷酸锌外，牙本质预处理与铸造相比，在脱粘牙面上保留的粘固剂量为0.5%。控制冠表面积减少了强度值的变化，允许脱敏剂/水泥组合的保留值之间的高歧视。除了1个组合，Gluma脱敏剂显著！降低牙冠固位力。对于树脂粘固剂和树脂改性玻璃离子，使用All-Bond 2脱敏剂显著增加冠保持值。
Statement of problem. Past research has not controlled preparation surface area when examining the influence of dentin desensitizers on the retentive strength of cemented cast crowns, leading to inconsistent results.Purpose. This research controlled crown preparation surface area and evaluated. the the effect of various dentin desensitizers and conventional cementing agents on the in vitro retentive strength of cast crowns.Methods and material. Freshly extracted human molars were prepared for a standardized crown preparation (26 degrees total convergence, 4 mm axial height) with a custom-made pantograph. Dentin desensitizers included none (control), a polymerizable material (All-Bond 2), and a nonpolymerizable desensitizer (Gluma Desensitizer). Cementing agents included zinc phosphate (Fleck's), glass ionomer (Ketac-Cem) resin-modified glass ionomer (Fuji II), and resin cement (Panavia 21). Twelve teeth were prepared for each test condition (144 teeth total). Individual castings were made from a base metal alloy (Rexillium III). Crowns were removed after storage at 26 degrees C for 48 hours at 100% relative: humidity! using a universal testing machine at a crosshead speed of 1.27 mm/min. The proportion of cement retained on the tooth and casting after debonding nas quantified according to treatment. Statistical treatment included 1- and 2-way ANOVAs, followed by the Tukey-Kramer post hoc test at a preset alpha of 0.05.Results. Resin cement exhibited the highest retentive strength and all dentin treatments resulted in significantly different retentive values (All-Bond 2 (5.68 +/- 0.70 MPa) > control (4.67 +/- 0.48 MPa) > Gluma. (4.12 +/- 0.37 MPa)). Retention of resin-modified glass ionomer was between thr resin cement and glass ionomer groups: All-Bond 2 (3.46 +/- 0.26 MPa) > Gluma (2.81 +/- 0.15 MPa) = control (2.96 +/- 0.18 MPa). Conventional glass ionomer values were between those of Fuji Plus and zinc phosphate groups: All Bond 2 (2.23 +/- 0.20 MPa) = control (2.36 +/- 0.20 MPa) > Gluma (1.98 +/- 0.23 MPa). Zinc phosphate had the: lowest retention values: control (1.68 +/- 0.08 MPa) > Gluma (0.81 +/- 0.11 MPa) > All-Bond 2 (0.67 +/- 0.14 MPa). The majority! of cement was retained on the debonded tooth surface versus thr casting, with the excetption of zinc phosphate: when: used with dentin pretreatments.Conclusion. Controlled crown surface areas reduced the variation in strength values permitting high discrimination among retention values of desensitizer/cement combinations. In all but 1 combination, Gluma desensitizer significantly! decreased crown retention. With resin cement and resin-modified glass ionomer, use of All-Bond 2 desensitizer significantly increased crown retention values.