Department of Oral Implantology, Peking University School and Hospital of Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing, 10081, PR China.
BMC Oral Health. 2024 Mar 22;24(1):374. doi: 10.1186/s12903-024-03986-4.
To compare the crown accuracy and time efficiency of a complete digital workflow, utilizing an auxiliary occlusal device and IO scanning, with a conventional workflow, for multiple implant-supported single crowns.
24 patients with two adjacent posterior implants were included. 12 patients were randomly assigned to digital workflow group, involving intra-oral scanning with an auxiliary occlusal device and manufacture of customized abutments and zirconia single crowns (test group). The other 12 were assigned to the conventional workflow (control group), involving conventional impression and CAD-CAM crowns based on stone casts. Crown scanning was done before and after clinical adjustment using an intraoral scanner. Two 3D digital models were overlapped to assess dimension changes. Chair-side and laboratory times for the entire workflow were recorded and a linear mixed model and Independent-sample t tests were used for the statistical analysis.
The maximum occlusal deviation was 279.67 ± 112.17 μm and 479.59 ± 203.63 μm in the test and control group, respectively (p < 0.001). The sizes of the occlusion adjustment areas were 12.12 ± 10.51 mm and 25.12 ± 14.14 mm in the test and control groups, respectively (p = 0.013). The mean laboratory time was 46.08 ± 5.45 and 105.92 ± 6.10 min in the test and control groups, respectively (p < 0.001).The proximal contact adjustment and mean chair-side time showed no statistically significant difference between two groups.
A digital workflow for two implants-supported single crowns using an auxiliary device required fewer occlusal crown adjustments, and less laboratory time compared to conventional workflow.
The use of auxiliary occlusal devices in IOS enhances the accuracy of virtual maxillomandibular relationship in extended edentulous spans. Consequently, employing a digital workflow for multiple implants-supported crowns using IO scanning and an auxiliary occlusal device proves to be a feasible, accurate and efficient approach.
比较使用辅助咬合装置和 IO 扫描的完整数字化工作流程与传统工作流程在多个种植体支持的单冠中的冠准确性和时间效率。
纳入 24 名有两个相邻后牙种植体的患者。12 名患者被随机分配到数字化工作流程组，涉及使用辅助咬合装置进行口内扫描以及定制基台和氧化锆单冠的制作（试验组）。其余 12 名患者被分配到传统工作流程组（对照组），涉及基于石膏模型的常规印模和 CAD-CAM 冠。使用口内扫描仪在临床调整前后进行冠扫描。重叠两个 3D 数字模型以评估尺寸变化。记录整个工作流程的椅旁和实验室时间，并使用线性混合模型和独立样本 t 检验进行统计分析。
试验组和对照组的最大咬合偏差分别为 279.67±112.17μm 和 479.59±203.63μm（p<0.001）。咬合调整区域的尺寸分别为 12.12±10.51mm 和 25.12±14.14mm 在试验组和对照组中（p=0.013）。试验组和对照组的平均实验室时间分别为 46.08±5.45 和 105.92±6.10min（p<0.001）。两组之间的近中接触调整和平均椅旁时间无统计学差异。
与传统工作流程相比，使用辅助装置的两个种植体支持的单冠数字化工作流程需要更少的咬合冠调整，并且实验室时间更短。
在扩展的无牙颌中，IOS 中辅助咬合装置的使用增强了虚拟上下颌关系的准确性。因此，使用 IO 扫描和辅助咬合装置的数字化工作流程来制作多个种植体支持的冠是一种可行、准确且高效的方法。
