Sharab Lina, Jensen David, Hawk Gregory, Kutkut Ahmad
Division of Orthodontics, College of Dentistry, University of Kentucky, Lexington, KY 40536, USA.
Department of Statistics, University of Kentucky, Lexington, KY 40536, USA.
Dent J (Basel). 2023 Mar 15;11(3):81. doi: 10.3390/dj11030081.
Complete denture fabrication requires multiple clinical and laboratory steps. One of the most critical clinical steps is establishing an anatomical occlusal plane based on hard and soft tissue references. The aim of this study was to determine whether age or gender affects the level of the Ala-Tragus plane to establish which reference point on the Tragus should be used when fabricating the occlusal plane in edentulous patients. Clinical photographs and lateral cephalometric radiographs with complete dentitions were taken from 58 volunteers at the DMD clinic at the University of Kentucky. Each photograph was superimposed over its corresponding cephalometric image. An analysis was conducted to establish the angle of the occlusal plane relative to the Ala-Tragus landmarks; this data was then grouped according to age and gender. The analysis shows that age and gender did not significantly affect where the Camper's plane should be approximated for complete denture treatment. However, it was found that the most parallel line to the occlusal plane was Ala's inferior border to the 'Tragus's inferior border. It should be noted that the volunteers' skeletal classification was significantly related to a Cl III malocclusion tendency. Still, with this new information, functionality and esthetics can be more adequately addressed for patients undergoing complete denture treatment. Given our results, we suggest redefining the 'Camper's plane with a line extending from 'Ala's inferior border to the 'Tragus's inferior border instead of the superior border. Further consideration should be taken if the patient is a skeletal CL III malocclusion.
全口义齿制作需要多个临床和实验室步骤。最关键的临床步骤之一是根据软硬组织参考来确定解剖学咬合平面。本研究的目的是确定年龄或性别是否会影响鼻翼-耳屏平面的高度，以确定在为无牙患者制作咬合平面时应使用耳屏上的哪个参考点。从肯塔基大学牙科学院诊所的58名志愿者处获取了带有完整牙列的临床照片和头颅侧位片。每张照片都与相应的头颅侧位影像进行叠加。进行分析以确定咬合平面相对于鼻翼-耳屏标志的角度；然后根据年龄和性别对该数据进行分组。分析表明，年龄和性别对全口义齿治疗中应近似确定坎贝尔平面的位置没有显著影响。然而，发现与咬合平面最平行的线是鼻翼下缘至耳屏下缘。应当指出，志愿者的骨骼分类与Ⅲ类错颌倾向显著相关。尽管如此，有了这些新信息，对于接受全口义齿治疗的患者，可以更充分地考虑功能和美观问题。根据我们的研究结果，我们建议用一条从鼻翼下缘延伸至耳屏下缘而非上缘的线来重新定义“坎贝尔平面”。如果患者是骨骼Ⅲ类错颌，则应进一步考虑。
