The aim of this study is to compare the clinical outcomes of delta wire technique and extension block pinning in terms of distal interphalangeal joint active flexion, extension lag, union time, the visual analogue scale and Crawford criteria. Trying to find out the best surgical intervention to treat mallet fractures. Methods: In order to prepare this systematic review and meta-analysis, we adhered to the PRISMA statement's requirements. Using pertinent keywords, a computerized literature search was done in Cochrane Central, Web of Science, and PubMed. Utilizing Review Manager Version 5.4.1 for Windows, data was retrieved and synthesized from the records after they had been checked for admissible studies. Case studies, clinical trials, and randomized control trials about mallet fracture in individuals older than 18 were all included. We took open fractures out, and the injury happened more than four weeks after the initial injury. Results: This study provides evidence that extension block technique has better outcome regarding active distal interphalangeal flexion than the delta wire, but there is no difference between the two techniques regarding degree of extension lag, union time, and visual analog scale and Crawford criteria. Conclusion: Further high quality randomize control studies between the two techniques is needed to find out the best surgical way to treat mallet fracture.

Keywords : Mallet finger, Delta frame, Delta wiring, Block wire, blocking wire, pinning.