Tibial torsion correlates with talar morphology |
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| Institution: | 1. Department of Orthopaedic Surgery and Traumatology, Hospital Universitari Germans Trias i Pujol, School of Medicine, Autonomous University of Barcelona, Carretera de Canyet, s/n, 08916 Badalona (Barcelona), Spain;2. Queen Mother Hospital for Small Animals, Royal Veterinary College, Hawkshead Lane, North Mymms, Hertfordshire AL9 7TA, UK;3. Department of Psychiatry and Forensic Medicine, School of Medicine, Autonomous University of Barcelona, 08193 Bellaterra (Barcelona), Spain;1. Medipol University Medical School Department of Orthopedic Surgery, ?stanbul Turkey;2. University of Health Sciences Bagcilar Training and Research Hospital, Istanbul, Turkey;3. Ac?badem University Medical School Department of Orthopedic Surgery, ?stanbul, Turkey;1. Hospital General Universitario Gregorio Marañón, Calle del Dr. Esquerdo, 46, 28007 Madrid, Spain;2. Hospital Universitario Infanta Cristina, Avda 9 de julio, 28981, Parla, Spain;1. Hospital Beatriz Ângelo, Portugal;2. Hospital da Luz Lisboa, Portugal |
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| Abstract: | BackgroundThere is limited literature on axial rotation of the ankle or variations in anatomy of the talus. We aim to evaluate the rotational profile of the distal tibia and its relationship to talus morphology, radiographic foot-type, and tibiotalar tilt in arthritic ankles.MethodsPreoperative imaging was reviewed in 173 consecutive patients with ankle arthritis. CT measurements were used to calculate tibial torsion and the talar neck-body angle (TNBA). Tibiotalar tilt and foot-type were measured on weightbearing plain radiographs.ResultsMeasurements indicated mean external tibial torsion of 29.2 ± 9.1? and TNBA of 35.2 ± 7.5? medial. Tibiotalar tilt ranged from 48? varus to 23.5? valgus. A moderate association between increasing external tibial torsion and decreasing TNBA was found (ρ = ?0.576, p < .0001). Weak relationships were found between external tibial torsion and varus tibiotalar tilt (ρ = ?0.239, p = .014) and plantarflexion of the talo-first metatarsal angle (ρ = ?0.218, p < .025).ConclusionWe observed a statistically significant correlation between tibial torsion and morphology of the talus, tibiotalar tilt, and first ray plantarflexion. This previously unreported association may provide information regarding the development of foot and ankle deformity and pathology.Level of evidenceLevel III. |
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| Keywords: | Tibial torsion Talus Alignment Rotation Deformity Ankle arthritis |
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