Subagio Eko Agus, Peul Wilco C, Abdillah Diaz Syafrie
Department of Neurosurgery, Faculty of Medicine, Airlangga University, Dr. Soetomo General Academic Hospital, Surabaya, Indonesia.
Brain and Spine Center Mitra Keluarga Hospital, Surabaya, Indonesia.
J Craniovertebr Junction Spine. 2025 Apr-Jun;16(2):195-199. doi: 10.4103/jcvjs.jcvjs_53_25. Epub 2025 Jul 3.
Ponticulus posticus (PP), also known as arcuate foramen or Kimmerle's anomaly, is an atlas (C1) bone anomaly in the form of a bone bridge. This study aims to determine the prevalence of PP in two hospitals in Surabaya, Indonesia, and to determine the risk factors for PP and its impact on the thickness of the C1 lamina.
We conducted a retrospective analysis using a total sampling technique of computed tomography scan results from 121 patients at Dr. Soetomo Surabaya Hospital's and Mitra Keluarga Surabaya Hospital's Department of Neurosurgery. The study included patients aged 18 and aging who met the inclusion criteria. We assessed the relationship between C1 morphological characteristics and PP prevalence, with particular focus on laminar thickness measurements.
The study found a prevalence of PP of 15.7%. The mean thickness of the posterior arch lamina with PP was 3.3 ± 0.95 mm on the right side and 3.4 ± 1.0 mm on the left side. Although these figures are not statistically significant, both were thinner than the lamina without PP. The study also found that the prevalence of PP increases with age, with a significant value of < 0.001.
The average thickness of the posterior lamina arch containing PP has a smaller value but is not statistically significant. In this study, significant statistical results were obtained to suggest that the prevalence of PP increases with age (degenerative).
后弓小骨（PP），也称为弓状孔或金默尔氏异常，是第一颈椎（C1）骨的一种呈骨桥形式的异常。本研究旨在确定印度尼西亚泗水市两家医院中PP的患病率，并确定PP的危险因素及其对C1椎板厚度的影响。
我们采用全抽样技术对泗水苏托莫医院和泗水米特拉凯鲁加医院神经外科的121例患者的计算机断层扫描结果进行回顾性分析。该研究纳入了符合纳入标准的18岁及以上患者。我们评估了C1形态特征与PP患病率之间的关系，特别关注椎板厚度测量。
研究发现PP的患病率为15.7%。有PP的后弓椎板右侧平均厚度为3.3±0.95毫米，左侧为3.4±1.0毫米。虽然这些数字无统计学意义，但两者均比无PP的椎板薄。研究还发现PP的患病率随年龄增加，显著值<0.001。
含PP的后弓椎板平均厚度值较小，但无统计学意义。在本研究中，获得了显著的统计结果，表明PP的患病率随年龄（退变）增加。
