The current study aimed to find a prediction equation to estimate the arch perimeter (AP) depending on various arch dimensions including intercanine width (ICW), intermolar width (IMW), interpremolar width (IPMW), and arch length (AL) in a sample of the Kurdish population in Sulaimani City. The study sample was 100 pairs of preorthodontic dental casts. Calculations of dental arch dimensions and perimeter were performed by a digital vernier. Statistical analysis was performed via using the SPSS version 25 software. The developed prediction equation for the upper arch was , whereas the equation for the lower arch was . Paired -test revealed no statistical difference between predicted and real arch perimeters. Two separate prediction equations for upper and lower arches were developed based on the arch length (AL) and intermolar width (IMW) for the maxillary arch, intermolar (IMW), and inter canine widths (ICW) for the lower arch. The developed equations could have further beneficial impacts on orthodontic diagnosis and treatment planning.

中文翻译：

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基于其他线性牙弓测量结果预测苏莱曼尼市库尔德样本的牙弓周长作为咬合不正的预防措施


当前的研究旨在找到一个预测方程，根据样本中的各种牙弓尺寸，包括尖牙间宽度 (ICW)、磨牙间宽度 (IMW)、前磨牙间宽度 (IPMW) 和牙弓长度 (AL) 来估计牙弓周长 (AP)苏莱曼尼市的库尔德人口。研究样本是 100 对正畸前的牙模。牙弓尺寸和周长的计算通过数字游标进行。使用SPSS 25版软件进行统计分析。上拱的预测方程为 ，而下牙弓的方程是 67> 。配对-测试显示预测的足弓周长和实际的足弓周长之间没有统计差异。基于上颌牙弓的牙弓长度 (AL) 和磨牙间宽度 (IMW)、下牙弓的磨牙间 (IMW) 和尖牙间宽度 (ICW)，开发了上下牙弓的两个单独的预测方程。所开发的方程可能对正畸诊断和治疗计划产生进一步的有益影响。