Experience in using three-dimensional preoperative planning and resections guides templates for SCARF osteotomy in mild and moderate deformities of Hallux valgus

Relevance: scarf osteotomy is a reliable procedure to correct Hallux valgus deformity, but it demands high skill of the surgeon. Purpose of study: to test the clinical application of 3D printing technology with the creation of an individual guide template to improve the accuracy of performance scarf osteotomy Methods: From 02.01.2018 to 27.02.2020, we examined clinical cases of 92 patients (92 feet) with mild to moderate deformity of Hallux valgus. All patients have got scarf surgery. In group A it was performed a complex of three-dimensional planning with the creation of an individual guide template; the operations were performed by experienced surgeon. Group B studied patients who passed surgery by the traditional method. Group B also used guide templates, but the operations were performed by a surgeon, who was mastering the technique. All patients were questioned using AOFAS (100 points) and VAS (100 points), MOXFQ (100 points) before surgery, 6 and 12 months after surgery. By the end of the 12th month after surgery were assessed the radiographic indicators of foot deformity. Results: On the 6th month, improvements were achieved in group A on the AOFAS (p = 0.000023), VASFA (p = 0.000830), MOXFQ (p = 0.004586) scales, in group B - AOFAS (p = 0.001120 ) and VASFA (p = 0.003551), in group B only AOFAS (p = 0.000003). In both groups, we got an improvement in AOFAS, VAS, MOXFQ at the 12th month after surgery; there was no significant difference in the assessment of values between the groups. There was no significant statistically difference in comparison between the groups, when assessing the angular indicators. In all groups, results were found which reflect the successful elimination of the deformity. Conclusions: in routine practice, the method has no advantages, however, the technology can be proposed in studying specialists of scarf technique. It is required to study the learning curve of applying the method teaching the scarf technique.