基于地形分区预测眶底和内侧眶壁骨折的表面积大小。

Prediction of surface area size in orbital floor and medial orbital wall fractures based on topographical subregions.

机构信息

Department of Oral and Maxillofacial Surgery and Facial Plastic Surgery, University Hospital, Munich, Germany.

Clinic for Craniomaxillofacial and Oral Surgery, University Hospital, Basel, Switzerland.

出版信息

J Craniomaxillofac Surg. 2021 Jul;49(7):598-612. doi: 10.1016/j.jcms.2020.07.010. Epub 2020 Jul 27.

DOI:10.1016/j.jcms.2020.07.010

PMID:34020871

Abstract

OBJECTIVE

This retrospective study evaluates the occurrence and frequency of different fracture patterns in a series of computed tomography (CT) scans in terms of the AOCMF Trauma Classification (TC) orbit module and correlates the assigned defects with measurements of the fracture area in order to get an approximate guideline for fracture size predictions on the basis of the classification.

MATERIAL AND METHODS

CT scans of patients with orbital floor fractures were evaluated using the AOCMFTC to determine the topographical subregions. The coding consisted of: W = orbital wall, 1 = anterior orbit, 2 = midorbit, i = inferior, m = medial. The 3-dimensional surface area size of the fractures was quantified by the "defect body" method (Brainlab, Munich, Germany). The fracture area size and its confidence and prediction interval within each topographical subregion was estimated by regression analysis.

RESULTS

A total of 137 CT scans exhibited 145 orbital floor fractures, which were combined with 34 medial orbital wall fractures in 31 patients. The floor fractures - W1(i)2(i) (n = 86) and W1(i) (n = 19) were the most frequent patterns. Combined floor and medial wall fractures most frequently corresponded to the pattern W1 (im)2 (im) (n = 15) ahead of W1 (im) 2(i) (n = 10). The surface area size ranged from 0.11 cm to 6.09 cm for orbital floor and from 0.29 cm to 5.43 cm for medial wall fractures. The prediction values of the mean fracture area size within the subregions were computed as follows: W1(i) = 2.25 cm, W2(i) = 1.64 cm, W1(i)2(i) = 3.10 cm, W1(m) = 1.36 cm, W2(m) = 1.65 cm, W1(m)2(m) = 2.98 cm, W1 (im) = 3.35 cm, W1 (im) 2(i) = 4.63 cm, W1 (im)2(m) = 4.06 cm and W1 (im)2 (im) = 7.16 cm.

CONCLUSION

The AOCMFTC orbital module offers a suitable framework for topographical allocation of fracture patterns inside the infero-medial orbital cavity. The involvement of the subregions is of predictive value providing estimations of the mean 3-D fracture area size.

摘要

目的

本回顾性研究根据 AOCMF 创伤分类（TC）眼眶模块评估一系列计算机断层扫描（CT）中不同骨折模式的发生和频率，并将确定的缺损与骨折面积的测量相关联，以便根据分类得到骨折大小预测的大致指南。

材料和方法

使用 AOCMFTC 评估眼眶骨折患者的 CT 扫描，以确定局部亚区。编码包括：W=眼眶壁，1=前眼眶，2=中眼眶，i=下侧，m=内侧。通过“缺损体”方法（德国慕尼黑 Brainlab）定量评估骨折的三维表面积大小。通过回归分析估计每个局部亚区的骨折面积大小及其置信区间和预测区间。

结果

共 137 例 CT 扫描显示 145 例眼眶下壁骨折，其中 31 例患者合并 34 例内侧眼眶壁骨折。最常见的骨折模式为 W1(i)2(i)(n=86)和 W1(i)(n=19)。合并的眶底和内侧壁骨折最常对应于模式 W1(im)2(im)(n=15)，其次是 W1(im)2(i)(n=10)。眶底骨折的表面积大小范围为 0.11cm 至 6.09cm，内侧壁骨折的表面积大小范围为 0.29cm 至 5.43cm。计算得出各亚区平均骨折面积大小的预测值如下：W1(i)=2.25cm，W2(i)=1.64cm，W1(i)2(i)=3.10cm，W1(m)=1.36cm，W2(m)=1.65cm，W1(m)2(m)=2.98cm，W1(im)=3.35cm，W1(im)2(i)=4.63cm，W1(im)2(m)=4.06cm，W1(im)2(im)=7.16cm。