Rignon-Bret Christophe, Mushegyan Vagan, Naveau Adrien
Int J Prosthodont. 2016 Mar-Apr;29(2):169-72. doi: 10.11607/ijp.4347.
This study compared tissue three-dimensional (3D) displacements during the material setting phase of two maxillary impression tray-holding techniques: clinician manual pressure and patient occlusal pressure.
The resultant two maxillary casts for each of 10 edentulous patients were compared using an optical 3D measurement system.
The junction between the hard and soft palates acted like a rotation center during impression making. The vertical displacements were significantly lower and posteriorly set when the impression was taken with the patient's occlusion, in contrast to being located at the anterior two-thirds during the manual impression technique.
Use of patient's occlusion as a tray-holding technique may be preferred during the material setting phase of maxillary impressions.
本研究比较了两种上颌印模托盘固定技术在材料凝固阶段的组织三维（3D）位移：临床医生手动施压和患者咬合施压。
使用光学3D测量系统对10名无牙患者的每组两个上颌模型进行比较。
在制取印模过程中，硬腭和软腭的交界处起到了旋转中心的作用。与手动印模技术时位于前三分之二处相比，当患者咬合制取印模时，垂直位移明显更低且位置更靠后。
在上颌印模材料凝固阶段，使用患者咬合作为托盘固定技术可能更可取。
