Ali Rokni - Orthopedic Resident, Department of Orthopedic, Kerman University of Medical Sciences, Kerman, Iran .
Vahideh Hosseinzadeh - Pediatric Resident, Mashhad University of Medical Sciences, Mashhad, Iran.
Fatemeh Vafi sani - Master of Operating Room, Department of Operative Room and Anesthetics, School of Paramedical, Sabzevar University of Medical Sciences, Sabzevar, Iran.
Masumeh Ghazanfarpour - Student Research Committee, Kerman University of Medical science, Kerman, Iran.
Neda Asadi - Department of Critical Care Nursing, School of Nursing and Midwifery, Kerman University of Medical Sciences, Kerman, Iran.
Omolbanin Heydari - Student Research Committee, Kerman University of Medical science, Kerman, Iran.
Sahebeh Dadshahi - Student Research Committee, Kerman University of Medical science, Kerman, Iran.
Malihe Pouredalati - Student Research Committee, Kerman University of Medical science, Kerman, Iran.
Seyed Amirreza Akhlagh - Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran.

Background Hip dysplasia is an abnormality of the hip joint where the socket portion does not fully cover the ball portion, which might increase the risk of joint dislocation. Hip dysplasia may occur at birth or develop in early life. The purpose of the present study was to assess the effect of treatment with Tübingen hip flexion splint for Developmental Dysplasia of the Hip (DDH), and its safety. Materials and Methods: The systematicsearch was carried out on the online databases (Medline, Cochrane library, EMBASe, and Scopus) to assess the effect of treatment with Tübingen hip flexion splint for developmental dysplasia of the hip. Articles indexed until ۲۰ April ۲۰۲۰ were reviewed using keywords such as (Hip dislocation, Congenital, DDH, and Tübingen hip flexion splint). The study selection was carried out by two reviewers. Results: Six studies were included in systematic review and meta-analysis. The pooled successful rate of Tübingen hip flexion splint was ۸۸% with a Confidence Interval [CI]; ۸۷-۹۷%; p <۰.۰۰۱; heterogeneity; I۲: ۸۹%%, p <۰.۰۰۱; six trials; random effect model. The heterogeneity level was high among the included studies. Due to high heterogeneity, the sensitivity analysis was conducted to assess the effect of each study on the result and the level of heterogeneity. The results of the sensitivity analysis showed that no studies influenced the outcome and the level of heterogeneity. However, the pieces of advice were not associated with serious side effects. Conclusion According to the results, the success rate of this Tubingen brace was ۸۸%. Moreover, the results must be interpreted with caution due to the small sample size and high heterogeneity. The effectiveness of this method in the long term is still debatable.

Children, Development, Hip dysplasia, Tübingen hip flexion splint