Srinivasan Bhadrinath, Padmanabhan Sridevi, Chitharanjan Arun B
Department of Orthodontics, Faculty of Dental Sciences, Sri Ramachandra University, Porur, Chennai, India.
Department of Orthodontics, Faculty of Dental Sciences, Sri Ramachandra University, Porur, Chennai, India.
Int Orthod. 2018 Sep;16(3):486-498. doi: 10.1016/j.ortho.2018.06.015. Epub 2018 Jul 10.
The aim of this study was to assess and compare the cervical vertebral maturation stages in adults with different skeletal bases.
A total of 133 lateral cephalograms were selected and allotted in to three groups A (50), B (43) and C (40) having Class I, Class II and Class III skeletal base respectively. Cervical vertebral maturation (CVM) using was assessed using Hassel and Farman method. The morphology of the vertebrae was evaluated by calculating the amount of concavities in the inferior borders of C2, C3 and C4 and the base to anterior height ratio (BAR) and posterior to anterior height ratio (PAR) for C3 and C4.
The overall distribution of CVMI 6 was the least followed by stages 5 and 4. The amount of concavities in C2, 3 and 4 were statistically significant (P<0.05) and was highest in Group C. The distribution of C3 and C4 BAR<0.96 was the least. The distribution of CVM 4 and C4 BAR>1.045 was greater in Group B compared to other groups.
Increased prevalence of lower levels of cervical vertebral maturation was observed in adult lateral cephalograms and in Class II skeletal base in particular.
本研究旨在评估和比较不同骨骼型成人的颈椎成熟阶段。
共选取133张头颅侧位片，分为A组（50例）、B组（43例）和C组（40例），分别为Ⅰ类、Ⅱ类和Ⅲ类骨骼型。采用Hassel和Farman方法评估颈椎成熟度（CVM）。通过计算C2、C3和C4下缘的凹陷量以及C3和C4的基底与前高比值（BAR）和后与前高比值（PAR）来评估椎体形态。
CVMI 6的总体分布最少，其次是5期和4期。C2、3和4的凹陷量具有统计学意义（P<0.05），且在C组中最高。C3和C4的BAR<0.96的分布最少。与其他组相比，B组中CVM 4和C4的BAR>1.045的分布更多。
在成人头颅侧位片中观察到颈椎成熟度较低水平的患病率增加，尤其是在Ⅱ类骨骼型中。
