中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (27): 4265-4270.doi: 10.12307/2021.180

• 数字化骨科 digital orthopedics •    下一篇

Scarf截骨横行截骨线倾斜角度与拇外翻矫形力度关系的3D骨骼重建分析

王文成,张兴飞,许亚军   

  1. 苏州大学附属无锡九院足踝外科,江苏省无锡市   214000
  • 收稿日期:2020-10-12 修回日期:2020-10-14 接受日期:2020-11-19 出版日期:2021-09-28 发布日期:2021-04-10
  • 通讯作者: 许亚军,副教授,苏州大学附属无锡九院足踝外科,江苏省无锡市 214000
  • 作者简介:王文成,男,1995年生,安徽省铜陵市人,汉族,苏州大学附属无锡九院在读硕士,主要从事足踝外科方面的研究。
  • 基金资助:
    无锡市卫生健康委科研面上项目经费(MS201902) ,项目负责人:许亚军;苏州大学附属无锡九院研究生科研经费,项目负责人:许亚军

Relationship between inclination angle of the transverse osteotomy line and the strength of hallux valgus orthopedic in Scarf osteotomy: analysis of three-dimensional bone reconstruction

Wang Wencheng, Zhang Xingfei, Xu Yajun   

  1. Department of Foot and Ankle Surgery, Wuxi Ninth Hospital, Soochow University, Wuxi 214000, Jiangsu Province, China
  • Received:2020-10-12 Revised:2020-10-14 Accepted:2020-11-19 Online:2021-09-28 Published:2021-04-10
  • Contact: Xu Yajun, Associate professor, Department of Foot and Ankle Surgery, Wuxi Ninth Hospital, Soochow University, Wuxi 214000, Jiangsu Province, China
  • About author:Wang Wencheng, Master candidate, Department of Foot and Ankle Surgery, Wuxi Ninth Hospital, Soochow University, Wuxi 214000, Jiangsu Province, China
  • Supported by:
    the Fund for Scientific Research Project of Wuxi Municipal Health Commission, No. MS201902 (to XYJ); the Research Fund for Graduate Students of Wuxi Ninth Hospital Affiliated to Soochow University (to XYJ)

摘要:

文题释义:
拇外翻:是指拇趾向外偏斜超过正常生理范围的一种进行性的前足畸形,由第一跖骨内侧骨性突起和外翻的拇趾组成,可伴有拇趾旋前。
3D手术模拟:利用患者的CT原始数据进行数字化三维重建,在此基础上编辑、配准,应用仿真手术功能预估截骨的位置、标志及截骨角度,能精确对比术前、术后机体解剖结构变化,并能进行解剖学测量。

背景:Scarf截骨由于是跖骨干部位截骨,矫形力度较大,截骨矫形效果显著,但常因截骨顶点线及截骨角度的改变而使矫形波动较大,导致矫正不足或矫正过度。三维重建软件在三维模型重建、截骨手术模拟及指标测量等方面具有独特优势,因此有必要针对Scarf截骨术中截骨线的倾斜角度对矫形力度的影响进行量化研究。
目的:利用3-matic软件分析Scarf截骨横行截骨线倾斜角度对拇外翻矫形力度的影响。
方法:纳入2018年5月至2020年9月苏州大学附属无锡九院足踝外科收治的14例拇外翻患者共21足,年龄22-76岁。在模拟负重支架辅助下,获得拇外翻患者足部模拟负重CT影像,在Mimics软件中进行三维骨骼模型构建,导入3-matic软件对第1跖骨行模拟Scarf截骨术,调整横行截骨线的不同截骨角度进行模拟截骨,然后进行模拟术后拇外翻相关指标的测量,并与同一个体、同一指标的测量结果进行对比,分析各测量值的变化趋势。
结果与结论:①Scarf截骨横行截骨线倾斜角度对于拇外翻角变化率、第1-2跖骨间夹角变化率、侧位第1-2跖骨间夹角变化率及跖骨头高度变化率有显著影响(P < 0.05);②同时截骨线倾斜角度在20°-25°区间时侧位第1-2跖骨间夹角及跖骨头高度变化率显著增大,在15°-20°区间时拇外翻角、第1-2跖骨间夹角变化率明显增大;③提示利用计算机辅助技术于术前模拟规划可为拇外翻畸形矫正提供一种个性化、精确化的方式,有利于降低手术并发症如转移性跖骨痛的发生率,增大截骨术式的矫形力度和截骨安全性,提高患者满意度,减少手术医师的学习曲线,对于临床上拇外翻的手术方式提供指导和理论依据。

https://orcid.org/0000-0003-4437-5843 (许亚军) 
中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程

关键词: 拇外翻, 数字化技术, Scarf截骨, 三维重建, 截骨角度

Abstract: BACKGROUND: Scarf osteotomy is an osteotomy of the metatarsal shaft, and the orthopedic force is strong, and the effect of osteotomy is significant, but the orthopedic often fluctuates greatly due to the change of the vetex line of the osteotomy and the angle of the osteotomy, causing undercorrection or overcorrection. Three-dimensional reconstruction software has unique advantages in three-dimensional model reconstruction, osteotomy simulation and index measurement. Therefore, it is necessary to quantify the influence of the osteotomy angle of the Scarf osteotomy line on the strength of orthopedic.  
OBJECTIVE: To analyze the influence of the inclination angle of the transverse osteotomy line on the strength of hallux valgus correction during Scarf osteotomy using 3-matic software.
METHODS:  From May 2018 to September 2020, 14 patients diagnosed with hallux valgus were admitted to the Department of Foot and Ankle Surgery, Wuxi Ninth Hospital, Soochow University, with 21 feet, aged 22 to 76 years old. With the aid of a simulated weight-bearing stent, the simulated weight-bearing CT images of the feet of patients with hallux valgus were obtained. Three-dimensional bone model was constructed in Mimics software, imported in 3-matic software to simulate Scarf osteotomy of the first metatarsal, adjust the different osteotomy angles of the transverse osteotomy line to simulate osteotomy. The relevant indexes of postoperative hallux valgus were measured, and compared with the measurement results of the same individual and the same index. The changing trend of each measured value was analyzed.  
RESULTS AND CONCLUSION:  (1) The inclination angle of the transverse osteotomy line of Scarf osteotomy has significant differences with the hallux valgus angle change rate, first-second intermetatarsal angle change rate, lateral intermetatarsal angle change rate and metatarsal head height change rate (P < 0.05). (2) At the same time, the change rate of lateral intermetatarsal angle and metatarsal head height increased significantly when the inclination angle of the osteotomy line was in the range of 20°-25°, and the change rate of hallux valgus angle and intermetatarsal angle was significantly increased in the range of 15°-20°. (3) It is concluded that using computer-assisted technology for preoperative simulation planning to provide a personalized and precise method for the correction of hallux valgus deformity, which is beneficial to reduce the incidence of surgical complications such as metastatic metatarsalgia, and increase the intensity of osteotomy orthopedic and the safety of osteotomy, improve patient satisfaction, reduce the learning curve of surgeons, and provide guidance and theoretical basis for clinical surgical treatment of hallux valgus.

Key words: hallux valgus, digital technology, Scarf osteotomy, three-dimensional reconstruction, osteotomy angle

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