三单位氧化锆固定义齿的边缘和内部适合性：修复体设计、粘结空间和氧化锆类型的影响。
Marginal and internal fit of three-unit zirconia fixed dental prostheses: Effects of prosthesis design, cement space, and zirconia type.
机构信息
Functional Occlusal Treatment, Department of Crown and Bridge Prosthodontics, School of Life Dentistry at Niigata, The Nippon Dental University, 1-8, Hamaura-cho, Chuo-ku, Niigata 951-8580, Japan.
Department of Crown and Bridge Prosthodontics, The Nippon Dental University School of Life Dentistry Niigata Japan.
出版信息
J Prosthodont Res. 2020 Oct;64(4):460-467. doi: 10.1016/j.jpor.2019.12.005. Epub 2020 Apr 8.
PURPOSE
The purpose of this study was to compare the marginal and internal fit of three-unit fixed dental prostheses (FDPs) fabricated using CAD/CAM with two designs, two cement space (CS), and two zirconia types.
METHODS
A master model with two zirconia abutments and a missing tooth was scanned with an intraoral scanner. FDPs were fabricated with two designs (Full contour: FC, Framework: FW), two zirconia types (multi-layer: L, single-layer: W), and two CS values (30 and 45 μm for L and 30 μm for W). There were six experimental groups. The fit of the FDPs was evaluated using the replica method. The space between an abutment and the FDPs in the marginal (MO), chamfer (CH), axial (AX), and occlusal (OC) areas was measured under an optical microscope and the data was statistically analyzed using three-way ANOVA and Bonferroni test (p < 0.05).
RESULTS
FW-l-45 μm showed a significantly smaller space than those for the FC in MO (p = 0.011), CH (p = 0.001) and AXE (p = 0.003). FW-l-30 μm showed a significantly smaller space than that for the 45 µm in AXE (p = 0.000) and OC (p = 0.016). FW-W-30 µm showed a significantly smaller space than that for the L in MO (p = 0.000), CH (p = 0.000), AXE (p = 0.000), and OC (p = 0.002).
CONCLUSIONS
The design and CS of the FDPs affected the fit. FDPs with single-layer zirconia showed better fit than that obtained with multi-layer zirconia.
目的
本研究旨在比较使用 CAD/CAM 制作的两种设计、两种氧化锆类型和两种粘结空间（CS）的三单位固定义齿（FDP）的边缘和内部适合性。
方法
使用口内扫描仪对带有两个氧化锆基台和缺失牙的母模进行扫描。使用两种设计（全轮廓：FC，框架：FW）、两种氧化锆类型（多层：L，单层：W）和两种 CS 值（L 为 30 和 45μm，W 为 30μm）制作 FDP。共有六个实验组。使用复制法评估 FDP 的适合性。在光学显微镜下测量基台与 FDP 之间的边缘（MO）、倒角（CH）、轴（AX）和咬合（OC）区域的空间，并使用三因素方差分析和 Bonferroni 检验对数据进行统计学分析（p<0.05）。
结果
FW-l-45μm 在 MO（p=0.011）、CH（p=0.001）和 AXE（p=0.003）处的空间明显小于 FC。FW-l-30μm 在 AXE（p=0.000）和 OC（p=0.016）处的空间明显小于 45μm。FW-W-30μm 在 MO（p=0.000）、CH（p=0.000）、AXE（p=0.000）和 OC（p=0.002）处的空间明显小于 L。
结论
FDP 的设计和 CS 影响适合性。单层氧化锆 FDP 的适合性优于多层氧化锆 FDP。
Zotero 插件