Center of Digital Dentistry, Peking University School and Hospital of Stomatology, Beijing, China.
Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, China.
Sci Rep. 2018 Jun 12;8(1):8975. doi: 10.1038/s41598-018-27277-5.
The present study aimed to establish and evaluate a method for recording edentulous jaw relations digitally without occlusal bases, using a handheld scanner and specially designed headgear. The headgear maintained the mandibular position. Ten edentulous patients' upper (U) and lower edentulous jaw models (L) were prepared and scanned. A handheld scanner was used to capture the labial alveolar ridge mucosa relations in the upper and lower anterior arches directly (Dr). U and L were registered to Dr (test group). Complete dentures of patients in the intercuspal position were used to construct the relationship between U and L (control group). Differences in jaw relations in the test and control groups, in terms of vertical difference, displacement and rotation of the anterior and posterior, and displacement and rotation of the left and right were assessed using the Hotelling's T test. The differences in the mean values and the mean of the absolute values of the jaw relations between groups were not statistically significant (P = 0.331) and significant (P = 0.016), respectively. Our findings show that it is possible to make digital recording of edentulous jaw relations by using a handheld scanner and headgear.
本研究旨在建立并评估一种无需咬合记录而通过手持扫描仪和特制头架记录无牙颌关系的方法。头架可维持下颌位置。制备并扫描 10 名无牙颌患者的上颌（U）和下颌（L）模型。使用手持扫描仪直接在上、下颌前弓的唇侧牙槽嵴黏膜关系处采集数据（Dr）。将 U 和 L 记录到 Dr（实验组）。使用患者处于正中关系位的全口义齿来构建 U 和 L 之间的关系（对照组）。使用 Hotelling's T 检验评估实验组和对照组在颌位关系上的垂直差异、前后向的位移和旋转以及左右向的位移和旋转。两组颌位关系的平均值和绝对值的平均值之间的差异均无统计学意义（P = 0.331）和显著差异（P = 0.016）。我们的研究结果表明，使用手持扫描仪和头架可以实现无牙颌关系的数字化记录。
