Abstract：
OBJECTIVE: To explore clinical effect of three-dimensional(3D) printing combined with distal humerus osteotomy for children with cubital varus deformity.
METHODS: From January 2017 to January 2020, 17 cubital varus deformity children treated with distal humerus osteotomy were retrospective analysis, included 11 boys and 6 girls, aged from 5 to 11 years old with an average of (7.8±1.7) years old. A model of affected side elbow joint was made by 3D printing technique before operation, pre-operation was performed on the model. Three-dimensional model was successfully used for distal humeral osteotomy during operation. Carrying angle, flexion and extension angle of elbow joint were compared before and six months after operation, and Flynn scoring criteria was used to evaluate clinical effect.
RESULTS: All children were followed up for 6 to 12 months with an avergae of (9.6±1.7) months. One child occurred wound infection and healed completely after dressing change. No complications such as nonunion, internal fixation and nerve injury occurred. Carrying angle of affected limb was improved from (-20.8±2.4)°before operation to (7.2±2.3)°at 6 months after operation (P<0.01). Angle of affected elbow joint extension improved from (-5.6±3.9)° before opeation to(-2.6±2.1)°at 6 months after operation (P<0.01). There was no significant difference in extension angle of elbow joint between preopertaion and postopertaion at 6 months (P>0.05). While there was no difference in elbow joint function on the healthy side and affected side at 6 months after opertaion (P>0.05). According to Flynn scoring criteria, 13 patients got excllent results and 4 moderate.
CONCLUSIONS: Three-dimensional printing combined with distal humerus osteotomy in treating elbow varus deformity could receive satisfactory clinical effect, which could accurately assist correction of cubital varus deformity, restore physiological structure and function of elbow joint.
METHODS: From January 2017 to January 2020, 17 cubital varus deformity children treated with distal humerus osteotomy were retrospective analysis, included 11 boys and 6 girls, aged from 5 to 11 years old with an average of (7.8±1.7) years old. A model of affected side elbow joint was made by 3D printing technique before operation, pre-operation was performed on the model. Three-dimensional model was successfully used for distal humeral osteotomy during operation. Carrying angle, flexion and extension angle of elbow joint were compared before and six months after operation, and Flynn scoring criteria was used to evaluate clinical effect.
RESULTS: All children were followed up for 6 to 12 months with an avergae of (9.6±1.7) months. One child occurred wound infection and healed completely after dressing change. No complications such as nonunion, internal fixation and nerve injury occurred. Carrying angle of affected limb was improved from (-20.8±2.4)°before operation to (7.2±2.3)°at 6 months after operation (P<0.01). Angle of affected elbow joint extension improved from (-5.6±3.9)° before opeation to(-2.6±2.1)°at 6 months after operation (P<0.01). There was no significant difference in extension angle of elbow joint between preopertaion and postopertaion at 6 months (P>0.05). While there was no difference in elbow joint function on the healthy side and affected side at 6 months after opertaion (P>0.05). According to Flynn scoring criteria, 13 patients got excllent results and 4 moderate.
CONCLUSIONS: Three-dimensional printing combined with distal humerus osteotomy in treating elbow varus deformity could receive satisfactory clinical effect, which could accurately assist correction of cubital varus deformity, restore physiological structure and function of elbow joint.
摘要：
目的：探讨三维打印联合肱骨远端截骨治疗儿童肘内翻畸形的临床效果。
方法：对2017年1月至2020年1月17例肱骨远端截骨治疗肘内翻畸形患儿进行回顾性分析。包括11个男孩和6个女孩，年龄5～11岁,平均(7.8±1.7)岁。术前采用3D打印技术制作患侧肘关节模型,术前对模型进行。三维模型成功用于术中肱骨远端截骨。携带角度,术前、术后6个月比较肘关节屈伸角度,采用Flynn评分标准评价临床疗效。
结果：所有患儿随访6~12个月，平均(9.6±1.7)个月。1例患儿发生伤口感染，换药后完全愈合。没有骨不连等并发症，内固定和神经损伤。患肢的携带角度从术前的（-20.8±2.4）°改善至术后6个月的（7.2±2.3）°（P<0.01）。受影响的肘关节伸展角度从手术前的（-5.6±3.9）°改善至术后6个月的（-2.6±2.1）°（P<0.01）。手术前和手术后6个月肘关节伸展角度差异无统计学意义（P>0.05）。术后6个月，健侧和患侧的肘关节功能无差异（P>0.05）。根据Flynn的评分标准,13例患者获得独立结果，4例中度。
结论：三维打印联合肱骨远端截骨治疗肘关节内翻畸形可获得满意的临床效果。可以准确地帮助矫正肘内翻畸形，恢复肘关节的生理结构和功能。
方法：对2017年1月至2020年1月17例肱骨远端截骨治疗肘内翻畸形患儿进行回顾性分析。包括11个男孩和6个女孩，年龄5～11岁,平均(7.8±1.7)岁。术前采用3D打印技术制作患侧肘关节模型,术前对模型进行。三维模型成功用于术中肱骨远端截骨。携带角度,术前、术后6个月比较肘关节屈伸角度,采用Flynn评分标准评价临床疗效。
结果：所有患儿随访6~12个月，平均(9.6±1.7)个月。1例患儿发生伤口感染，换药后完全愈合。没有骨不连等并发症，内固定和神经损伤。患肢的携带角度从术前的（-20.8±2.4）°改善至术后6个月的（7.2±2.3）°（P<0.01）。受影响的肘关节伸展角度从手术前的（-5.6±3.9）°改善至术后6个月的（-2.6±2.1）°（P<0.01）。手术前和手术后6个月肘关节伸展角度差异无统计学意义（P>0.05）。术后6个月，健侧和患侧的肘关节功能无差异（P>0.05）。根据Flynn的评分标准,13例患者获得独立结果，4例中度。
结论：三维打印联合肱骨远端截骨治疗肘关节内翻畸形可获得满意的临床效果。可以准确地帮助矫正肘内翻畸形，恢复肘关节的生理结构和功能。
