3D external shape analysis and barycentremetry can provide early signs of progression in adolescent idiopathic scoliosis.

IF 1.6 Q3 CLINICAL NEUROLOGY

Spine deformity Pub Date : 2024-11-04 DOI:10.1007/s43390-024-01001-y

Tristan Langlais, Claudio Vergari, Nicolas Mainard, Xavier du Cluzel, Matthieu Baudoux, Laurent Gajny, Kariman Abelin-Genevois, Jean Claude Bernard, Zongshan Hu, Jack Chun Yiu Cheng, Winnie Chiu Wing Chu, Ayman Assi, Mohamad Karam, Ismat Ghanem, Tito Bassani, Fabio Galbusera, Luca Maria Sconfienza, Marco Brayda-Bruno, Isabelle Courtois, Eric Ebermeyer, Raphael Vialle, Jean Dubousset, Wafa Skalli

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引用次数: 0

Abstract

Purpose: Our objective was to analysis the barycentremetry, obtained from the external envelope reconstruction of biplanar radiographs, in adolescent idiopathic scoliosis (AIS) and to determine whether assessing would help predict the distinction between progressive and stable AIS at the early stage.

Methods: A retrospective study with a multicentre cohort of 205 AIS was conducted. All AIS underwent a biplanar X-ray between 2013 and 2020. Inclusion criteria were Cobb angle between 10° and 25°; Risser sign lower than 3; age higher than 10 years; and no previous treatment. A 3D spine reconstruction was performed, and the barycentremetry parameters were computed, i.e., the center of mass position at the apex and the axial torque at the apex, the upper and lower junction. A severity index, helping to distinguish stable and progressive AIS, was computed on the first radiograph, and weighted according to these parameters. A clinical and radiographic monitoring determined if AIS were classified such a stable or progressive scoliosis.

Results: One hundred and sixty-two AIS were included (i.e., 87 were classified as stable and 75 as progressive). The apex center of mass position was different between the stable and progressive AIS groups (6 mm, SD = 4 mm for the whole cohort; 5 mm, SD = 4 mm for stable AIS versus 7 mm, SD = 4 mm for progressive AIS; p = 0.02). In AIS thoracic, the specificity and positive predictive value of the severity index increased by 19% and 16%, respectively, by adding the apex vertebral axial torque.

Conclusion: Early assessment of the external envelope from biplanar X-ray reconstruction of idiopathic scoliosis showed that the apex centre of mass position was significantly different between progressive and stable scoliosis. The inclusion of the axial torque of the apex vertebra in the severity index is promising to help the clinician distinguish between stable and progressive thoracic AIS at an early stage.

Level of evidence: II - Prognostic studies.

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三维外部形状分析和双曲面测量法可提供青少年特发性脊柱侧凸进展的早期征兆。

目的：我们的目的是分析青少年特发性脊柱侧弯症（AIS）患者双平面X光片外包膜重建获得的双曲面测量值，并确定评估是否有助于在早期阶段预测进展期和稳定期AIS的区别：方法：对 205 例 AIS 进行了多中心队列回顾性研究。所有 AIS 均在 2013 年至 2020 年间接受了双平面 X 光检查。纳入标准为：Cobb角在10°至25°之间；Risser征低于3；年龄大于10岁；既往未接受过治疗。进行了三维脊柱重建，并计算了测压参数，即顶点的质心位置和顶点、上下交界处的轴向扭矩。根据这些参数计算出严重程度指数，以帮助区分稳定型和进展型 AIS，并根据这些参数进行加权。通过临床和影像学监测来确定AIS是属于稳定型还是进行性脊柱侧凸：结果：共纳入 162 个 AIS（即 87 个被归类为稳定型，75 个为进展型）。稳定型和进展型AIS组的顶点质心位置不同（整个组别为6毫米，标差=4毫米；稳定型AIS为5毫米，标差=4毫米；进展型AIS为7毫米，标差=4毫米；P=0.02）。在胸椎 AIS 中，加入顶点椎体轴向扭矩后，严重程度指数的特异性和阳性预测值分别增加了 19% 和 16%：结论：根据特发性脊柱侧凸的双平面X光重建对外包膜的早期评估显示，脊柱顶点质心位置在进展型和稳定型脊柱侧凸之间存在显著差异。将顶点椎体的轴向扭矩纳入严重程度指数有望帮助临床医生在早期阶段区分稳定型和进展型胸椎AIS：II - 预后研究。

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来源期刊

Spine deformity

CiteScore

3.20

自引率

18.80%

发文量

167

期刊介绍： Spine Deformity the official journal of the?Scoliosis Research Society is a peer-refereed publication to disseminate knowledge on basic science and clinical research into the?etiology?biomechanics?treatment?methods and outcomes of all types of?spinal deformities. The international members of the Editorial Board provide a worldwide perspective for the journal's area of interest.The?journal?will enhance the mission of the Society which is to foster the optimal care of all patients with?spine?deformities worldwide. Articles published in?Spine Deformity?are Medline indexed in PubMed.? The journal publishes original articles in the form of clinical and basic research. Spine Deformity will only publish studies that have institutional review board (IRB) or similar ethics committee approval for human and animal studies and have strictly observed these guidelines. The minimum follow-up period for follow-up clinical studies is 24 months.