Orthodontics, Department of Odontology, Umeå University, Umeå, Sweden.
Department of Orthodontics, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Eur J Orthod. 2022 Sep 19;44(5):556-565. doi: 10.1093/ejo/cjac011.
In long-term studies of orthodontic, orthognathic, and prosthodontic treatments, control subjects are needed for comparison.
To study the craniofacial (skeletal, soft tissue, and dental) changes that occur in untreated subjects with normal occlusion between 13 and 62 years of age.
MATERIALS/METHODS: Thirty subjects with a Class I normal occlusion and harmonious facial profile were studied. X-ray examinations were performed at 13 (T1), 16 (T2), 31 (T3), and 62 (T4) years of age, and data were obtained from cephalograms. In total, 53 angular and linear parameters were measured using superimposition-based and conventional cephalometric methods to describe the craniofacial changes.
The jaws showed significant anterior growth from T1 to T2, and significant retrognathism from T3 to T4. The anterior face height and jaw dimensions increased significantly until T3. Significant posterior rotation of the mandible and opening of the vertical jaw relation, in addition to significant retroclination of the incisors and straightening of the facial profile, were found from T3 to T4.
Given the small sample size at T4, it was not possible to analyse the gender dimension.
CONCLUSIONS/IMPLICATIONS: Craniofacial changes continue up to the sixth decade of life. These changes are consistent, albeit to a lesser extent, with the adolescent growth patterns for most of the studied parameters, with the exceptions of incisor inclination, sagittal jaw position, vertical jaw relation and inclination, and posterior face height.
在正畸、正颌和修复治疗的长期研究中，需要对照研究来比较。
研究 13 至 62 岁正常咬合未治疗的患者的颅面（骨骼、软组织和牙齿）变化。
材料/方法：研究了 30 名具有 I 类正常咬合和协调面型的患者。在 13 岁（T1）、16 岁（T2）、31 岁（T3）和 62 岁（T4）时进行 X 射线检查，并从头颅侧位片上获取数据。总共使用基于叠加和传统头影测量方法测量了 53 个角度和线性参数，以描述颅面变化。
从 T1 到 T2，颌骨呈现出明显的前向生长，从 T3 到 T4 呈现出明显的后缩。从前面部高度和颌骨尺寸直到 T3 显著增加。从 T3 到 T4 发现下颌明显向后旋转和垂直颌关系开放，此外切牙明显内倾和面部轮廓变直。
由于 T4 时样本量较小，无法分析性别维度。
结论/意义：颅面变化一直持续到 60 岁。这些变化与大多数研究参数的青少年生长模式一致，只是程度较轻，除了切牙倾斜度、矢状颌位、垂直颌关系和倾斜度以及后面高。
