Abstract
Hallux rigidus is found in more than 2% of individuals aged 50 and above. As this condition progresses, mobility in the first metatarsophalangeal (MTP-1) joint decreases, leading practically to rigid fixation of the toe in the plantar flexion position, while pain and joint deformity caused by osteophytes intensify over time. Surgical approaches for hallux rigidus include joint arthroplasty of the first metatarsophalangeal joint, which is commonly employed. This study aimed to assess selected radiographic parameters of the foot before and after MTP-1 joint arthroplasty. The study involved 15 patients (15 feet), comprising 11 women and 4 men, at an average age of 54.7 years (range: 43 to 70). All participants underwent arthroplasty of MTP-1 using the Tornier FGT endoprosthesis. Various radiologic parameters were examined, including the hallux valgus angle, intermetatarsal angle, Horton's index, Meary's angle, Nikolaev's angle, and hallux angle in a lateral view. Radiological measurements were analysed using the R3.6.2 statistical package (R Core Team, 2019). After surgery, Horton's index showed a significant increase, rising from 7.2 to 8. Additionally, the HVA-L angle increased from 11.26 to 14.4. Arthroplasty of MTP-1 produces significant changes in radiographic parameters of foot statics.
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