3D printed individualized osteotomy template for treatment of painful talocalcaneal coalition of Rozansky types Ⅲ-Ⅳ / 中华创伤骨科杂志

ABSTRACT

Objective:To explore the effectiveness of 3D printed individualized osteotomy template for the treatment of painful talocalcaneal coalition of Rozansky types Ⅲ-Ⅳ.Methods:From January 2016 to August 2018, a 3D printed individualized osteotomy template was used in 14 patients with painful talocalcaneal coalition at Department of Foot and Ankle Surgery, Wuhan Fourth Hospital. They were 8 males and 6 females, aged from 19 to 42 years (mean, 30.2 years). CT scan of full bilateral feet was conducted. The bone bridge to be resected was marked and an individualized template designed taking the CT scans of the healthy foot as mirror images. The 3D individualized templates were used to assist resection of talocalcaneal coalitions. Scores of visual analogue scale(VAS) and American Orthopaedic Foot and Ankle Society (AOFAS) and complications were recorded at the final follow-up.Results:The 14 patients obtained an average follow-up of 21.6 months. Their VAS and AOFAS ankle and hindfoot scores (2.3±0.7 and 86.5±4.5) at the final follow-up were significantly improved compared with their preoperative values (7.0±1.9 and 37.1±6.0) ( P<0.05). Their follow-up X-ray films showed no recurrence of talocalcaneal coalition or traumatic arthritis. Conclusion:A 3D printed individualized osteotomy template is an effective assistance in the treatment of talocalcaneal coalition because it can lead to accurate location of the talocalcaneal bridge and full osteotomy.