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BACKGROUND: Surgical treatment of hallux valgus includes bone surgery and soft tissue balance surgery. At present, many surgical plans are made based on the experience of the surgeon. There are many surgical methods for hallux valgus, and the pathological changes are complex and diverse. No surgery can perfectly solve all the problems of hallux valgus, and the surgical effect is not accurate, and the learning curve is also long. OBJECTIVE: To explore the application of digital technology in the treatment of hallux valgus. METHODS: Databases of PubMed, Wanfang, and CNKI were searched. The key words were “hallux valgus; digital technology; biomechanics; finite element; digital orthopedics; osteotomy” in Chinese and English. Retrieval time was from January 2000 to May 2020. Among 571 articles in English and 350 articles in Chinese, 42 articles were selected according to the inclusion criteria for review. RESULTS AND CONCLUSION: (1) When clinical treatment of hallux valgus is performed, the software is used to reconstruct the three-dimensional simulation model, to simulate the operation under different working conditions, and to analyze the orthopedic effect. This has a clear guiding significance for preoperative planning and is helpful to reduce the incidence of postoperative complication of hallux valgus and optimize the orthopedic effect. (2) The use of computer software for three-dimensional modeling and finite element plantar stress analysis has obvious advantages for the study of biomechanical mechanisms and the evaluation of postoperative clinical efficacy. (3) The clinical application of three-dimensional printed hallux valgus osteotomy guide plate and bone model can enable the patients with hallux valgus to get more accurate and personalized treatment. [ABSTRACT FROM AUTHOR]

BACKGROUND: The purpose of the surgery for flat feet is to correct the deformity, to restore the medial longitudinal arch and to improve the foot and ankle function. However, it is not sufficient to satisfy the need of individualized treatment, only referring to two-dimensional data and the surgeon’s experience, so over-correction or under-correction usually occurs. The development of digital technology in medicine has greatly promoted the progress in orthopedics, including three-dimensional reconstruction, three-dimensional printing, surgical simulation and surgical navigation. This technologies have been widely used in shoulder joint, elbow joint, hip joint, keen joint and spine in recent years, but studies on flat feet are relatively rare.OBJECTIVE: To review the application status of digital technology in flat feet. METHODS: Databases of WanFang, CNKI, VIP and PubMed databases between January 2000 and September 2018 were searched. The keywords were "flat feet, digital technology, three-dimensional, finite element" in Chinese and English, respectively. Totally 882 articles were retrieved, and finally 49 eligible articles were included. RESULTS AND CONCLUSIONS:(1) The application of digital technology in flat feet mainly includes three-dimensional reconstruction, analyzing bone morphology, spatial position relationship and joint movement characteristics, establishing finite element model and stress analysis.(2) The three-dimensional flat feet model with high definition possesses obvious advantages in biomechanical research.(3) Digital guidance in flat feet osteotomy surgery is still rare and it is expected to improve the effect of flat feet surgery by referring to the research in some other orthopedic fields. [ABSTRACT FROM AUTHOR]