Aarts B E, Convens J, Bronkhorst E M, Kuijpers-Jagtman A M, Fudalej P S
Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
Department of Community and Restorative Dentistry, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
J Craniomaxillofac Surg. 2015 Dec;43(10):2106-11. doi: 10.1016/j.jcms.2015.10.013. Epub 2015 Oct 23.
Placement of a single-tooth implant should be performed when a patient's facial growth has ceased. In this retrospective observational study, we evaluated if there was a difference in the timing of cessation of craniofacial growth in short, average, and long facial types. Based on the value of the angle between cranial base and mandibular plane (SN/MP angle), three groups comprising 48 subjects with short facial type (SF; SN/MP ≤28°), 77 with average facial type (AF; SN/MP ≥31.5° and ≤34.5°), and 44 with long facial type (LF; SN/MP ≥38°) were selected. Facial growth was assessed on lateral cephalograms taken at 15.4 years of age, and 2, 5, and 10 years later. Variables were considered to be stable when the difference between two successive measurements was less than 1 mm or 1°. We found no difference between facial types in the timing of cessation of facial growth. Depending on the variable, the mean age when variables became stable ranged from 18.0 years (Is-Pal in LF group) to 22.0 years (SN/MP in LF group). However, facial growth continued at the last follow-up in approximately 20% subjects. This study demonstrates that facial type is not associated with the timing of cessation of facial growth.
单颗牙种植应在患者面部生长停止后进行。在这项回顾性观察研究中，我们评估了短面型、平均面型和长面型患者颅面生长停止时间是否存在差异。根据颅底与下颌平面夹角（SN/MP角）的值，选取了三组受试者，其中短面型（SF；SN/MP≤28°）48例，平均面型（AF；SN/MP≥31.5°且≤34.5°）77例，长面型（LF；SN/MP≥38°）44例。在15.4岁以及之后2年、5年和10年拍摄的头颅侧位片上评估面部生长情况。当连续两次测量的差值小于1毫米或1°时，认为变量稳定。我们发现不同面型在面部生长停止时间上没有差异。根据变量不同，变量变得稳定时的平均年龄范围为18.0岁（LF组的Is-Pal）至22.0岁（LF组的SN/MP）。然而，在最后一次随访时，约20%的受试者面部仍在生长。这项研究表明，面型与面部生长停止时间无关。
