Application of LARS Ligament Combined with 3D Printed Prosthesis in Reconstruction of Radial Half Wrist Joint after Tumor Resection _ Radius _ Function _ Clinical
Original Title Application of LARS titanium sheet grade 5 Ligament Combined with 3D Printed Prosthesis in Reconstruction of Radial Half Wrist Joint after Tumor Resection Chinese Journal of Reparative and Reconstructive Surgery Ding Hao Shao Xianhao Yang Qiang Li Ka Li Jianmin Li Zhenfeng Department of Bone Oncology Qilu Hospital Shandong University (Jinan 250000) Corresponding author Li Jianmin Email gkljm@163com; Li Zhenfeng Email zhenfengli163@163com Key words Distal radius; Bone tumor; LARS ligament; 3D-printed prosthesis; Hemi-wrist reconstruction Citation Ding Hao Shao Xianhao Yang Qiang et al Application of LARS Ligament Combined with 3D Printed Prosthesis in Reconstruction of Radial Half Wrist Joint after Tumor Resection Chinese journal of reparative and reconstructive surgery 2022 36(7) 822-827 doi 107507/1002-1892202202086 Summary Purpose To investigate the effect of LARS ligament and 3D printing prosthesis on the reconstruction of the radial half wrist joint after distal radius tumor resection Method From September 2017 to titanium round bar March 2021 the clinical data of 12 patients with distal radius tumor resection combined with LARS ligament and 3D printing prosthesis for radial half wrist reconstruction were retrospectively analyzed There were 7 males and 5 females with an average age of 418 years (range 19-63 years) There were 8 cases on the left side and 4 cases on the right side There were 10 cases of giant cell tumor of bone and 2 cases of osteosarcoma The course of disease ranged from 1 to 20 months with an average of 81 months The length of osteotomy operation time and intraoperative blood loss were recorded and the wrist function was evaluated by
Mayo score and American Musculoskeletal Oncology Society (MSTS) score before and after operation; The range of motion (ROM) of the wrist joint was measured including dorsiflexion flexion radial deviation and ulnar deviationBone ingrowth and osseointegration at the bone-prosthesis interface of the wrist joint were observed by imaging follow-up and the occurrence of wrist complications was recorded Result The operation was successfully completed in all 12 patients with an average osteotomy length of 6 8 cm (5 0 to 10 5 cm) an average operation time of 213 8 min (180 to 250 min) and an average intraoperative blood loss of 61 7 mL (30 to 150 mL) All patients were followed up for 11 to 52 ti6al4v months with an average of 308 months Imaging follow-up showed that bone ingrowth and osseointegration at the bone-prosthesis interface were observed in all patients and biological fixation was gradually achieved During the follow-up period the stability motor function and range of motion of the wrist joint were good and there were no complications such as arthritis subluxation prosthesis loosening infection tumor recurrence and metastasis Mayo score and MSTS score at the last follow-up were (821 ± 54) and (275 ± 15) respectively which ti6al4v eli were significantly improved compared with (488 ± 135) and (164 ± 14) before operation (t = ? 10761 P < 0001; t = ? 26600 P < 0001) The grip strength of the affected side was 59% ~ 88% of that of the healthy side with an average of 705% Wrist ROM was 55 ° to 80 ° in dorsiflexion (mean 6542 °) 35 ° to 60 ° in flexion (mean 4458 °) 10 ° to 25 ° in radial deviation (mean 1792 °) and 10 ° to 25 ° in ulnar deviation (mean 1833 °) Conclusion Expand the full text The combined application of LARS ligament and 3D printing prosthesis is an effective way to reconstruct bone and joint defects after distal radius tumor resection which can improve wrist function reduce complications and improve wrist stability Text Clinically giant cell tumor of bone is more common in distal radius and other bone tumors can also invade the site and the tumor often invades the wrist joint affecting its function In order to reduce the possibility of recurrence and improve the prognosis most of the invasive benign and malignant tumors of the distal radius need en bloc resection and reconstruction
