Changes in lip forms on three-dimensional images with alteration of lip support and/or occlusal vertical dimension in complete denture wearers
Changes in lip forms on three-dimensional images with alteration of lip support and/or occlusal vertical dimension in complete denture wearers
复制标题
全口义齿佩戴者唇部支撑和/或咬合垂直尺寸的改变导致三维图像上唇形的变化
DOI：
10.1016/j.jpor.2012.11.003
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发表时间：
2013
影响因子：
3.6
通讯作者：
Eiichi Nagaoka
中科院分区：
文献类型：
--
作者：
Masao Ushijima;Yuji Kamashita;Yasuhiro Nishi;Eiichi Nagaoka
目的：本研究旨在探讨全口义齿佩戴者由于咬合垂直尺寸（OVD）和/或唇支撑的改变而导致的唇形、口腔裂形和朱红色高度的变化。方法：对10例无牙患者（男4名，女6名）佩戴6种不同OVD和/或唇支撑的实验记录块（ExpRBs）时的三维面部图像进行分析。使用中线的三个标记（上唇（ls）、口部（sto）和下唇（li））和口裂的两个标记（中线左右20mm处（分别为r-OFP和l-OFP））进行分析。通过计算r-OFP和l-OFP的平均值（avrl-OFP）与sto之间的差值来评估口腔裂隙（COF）在正面视图中的曲率。正面视图中的朱红色高度计算为从sto到ls和li的距离。在10名受试者中，通过计算这些数据之间的差异来比较标准ExpRB和改变OVD和/或嘴唇支持的测试ExpRB。结果：ls、sto和li标志随OVD和/或唇部支持的改变而改变，avr - ofp随唇部支持的改变而垂直改变，随OVD和/或唇部支持的改变而横向改变。COF和朱砂高度受OVD和/或唇支撑改变的影响。结论：广泛唇托的OVD缺损可使口腔裂形向上弯曲，而缺乏唇托的OVD缺损可使朱唇高度降低。
Purpose: This study aimed to examine changes in the lip form, oral fissure form and vermilion height of complete denture wearers resulting from altered occlusal vertical dimension (OVD) and/or lip support.Methods: Three-dimensional facial images of 10 edentulous patients (four males and six females) when wearing six experimental record blocks (ExpRBs) with varying OVD and/or lip support were analyzed. Analysis was performed using three landmarks on the mid-line (labrale superius (ls), stomion (sto), and labrale inferius (li)) and two landmarks on the oral fissure (at points 20 mm right and left of the midline (r-OFP and l-OFP, respectively)). Curvature of the oral fissure (COF) in the frontal view was evaluated by calculating the difference between sto and the average of r-OFP and l-OFP (avrl-OFP). The vermilion height in the frontal view was calculated as the distance from sto to ls and li. In 10 subjects, comparison between standard ExpRB and test ExpRBs with altered OVD and/or lip support was performed by calculating differences between these data.Results: The ls, sto, and li landmarks changed with alteration of OVD and/or lip support, whereas avrl-OFP changed vertically with alteration of lip support and anteroposteriorly with alteration of OVD and/or lip support. COF and vermilion height were affected by alterations in OVD and/or lip support.Conclusion: Deficient OVD with extensive lip support can curve the oral fissure form upward, and deficient OVD with deficient lip support can reduce the vermilion height.