Prevalence and radiological characteristics of the dislocation of the second metatarsophalangeal joint in patients undergoing hallux valgus surgery; a matched control study |
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| Affiliation: | 1. Department of Orthopaedic Surgery, Rakusai-Shimizu Hospital, 13-107 Oe Kutsukake-cho, Nishikyo-ku, Kyoto, 610-1106, Japan;2. Department of Orthopedic Surgery, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki, Osaka, 569-0801, Japan;1. Graduate School of Global and Transdisciplinary Studies, Chiba University, Chiba, Japan;2. Department of Orthopaedic Surgery, Graduate School of Medical and Pharmaceutical Sciences, Chiba University, Chiba, Japan;3. Department of Japanese Language and Literature, University of the Sacred Heart, Tokyo, Japan;4. College of Liberal Arts and Sciences, Chiba University, Chiba, Japan;1. Department of Orthopaedic Surgery, The Jikei University Kashiwa Hospital, Kashiwashita 163-1, Kashiwa, Chiba, 2778567, Japan;2. Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan;1. Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China;2. First Clinical Medical School, Southern Medical University, Guangzhou, Guangdong, 510515, China;3. Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China |
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| Abstract: | BackgroundHallux valgus (HV) is occasionally associated with chronic subluxation or dislocation (CS/D) of the second metatarsophalangeal joint (2MTPj). The present study aimed to radiographically investigate the prevalence and characteristics of HV with CS/D of the 2MTPj compared with matched controls.MethodsDorsoplantar and lateral weight-bearing radiographs of 79 female patients (79 feet) who had HV with an age of 50 years or more were reviewed. All feet were treated with a proximal supination osteotomy for correction of HV. CS/D of the 2MTPj was evaluated on preoperative dorsoplantar and lateral radiographs. HV and intermetatarsal (IM) angles were measured. Seventy-nine feet were divided into two groups: Group CD (16 feet) had HV with CS/D of the 2MTPj, and Group non-CD had HV without the CS/D of the 2MTPj (63 feet). The severity of HV was divided into two grades according to the HV angle: moderate deformity (Group M, 36 feet, HV angle of less than 40°) and severe deformity (Group S, 43 feet, HV angle of 40° or greater). Group CD and non-CD, and Group M and S were matched by age, gender, and BMI.ResultsThe prevalence of CS/D of the 2MTPj was 20.3%. Group CD had a significantly higher HV angle (p = 0.0001) and a significantly higher IM angle (p = 0.042) than Group non-CD. The prevalence of CS/D of the 2MTPj in Group S (34.9%) were significantly higher than that in Group M (2.8%) (p < 0.001).ConclusionsCS/D of the 2MTPj was significantly associated with greater HV and IM angles compared with matched controls. The prevalence of CS/D of the 2MTPj (34.9%) in Group S was significantly higher than that in Group M. Severe HV can be at higher risk of acquiring CS/D of the 2MTPj in middle-aged and older females. |
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| Keywords: | Hallux valgus Chronic dislocation Metatarsophalangeal joint |
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