title: The effect of the Lapidus arthrodesis on the medial longitudinal arch: a radiographic review.
abstract: We reviewed the medical records and radiographs of 35 patients (3 males, 32 females; mean age 40.8 years) who underwent isolated, modified Lapidus arthrodesis for forefoot pathology in 39 feet. The purpose of the review was to evaluate the structural radiographic changes of the medial longitudinal arch (MLA) following isolated arthrodesis of the first tarsometatarsal joint. Pre- and postoperative standardized measurements of sagittal plane views of the foot were assessed to examine change in the MLA construct. The talo-first metatarsal angle and medial cuneiform height both had statistically significant changes, 2.97 degrees (range, 0-11.5 degrees) and 3.44 mm (range, 0-13 mm) (P < .0001) respectively. Our findings suggest that the Lapidus arthrodesis may influence the medial longitudinal arch.
authors.affiliation: San Francisco Bay Area Foot and Ankle Residency Program, Department of Orthopedics and Podiatric Surgery, Kaiser Permanente Medical Center, Oakland, CA, USA.
authors.forename: Attilio
authors.initials: A
authors.lastname: Avino
authors.forename: Sandeep
authors.initials: S
authors.lastname: Patel
authors.forename: Graham A
authors.initials: GA
authors.lastname: Hamilton
authors.forename: Lawrence A
authors.initials: LA
authors.lastname: Ford
mesh_terms: D000293:Adolescent; D000328:Adult; D001174:Arthrodesis / Q000379:methods*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008682:Metatarsal Bones / Q000000981:diagnostic imaging* / Q000601:surgery*; D008875:Middle Aged; D011859:Radiography; D016059:Range of Motion, Articular; D012189:Retrospective Studies; D013639:Tarsal Bones / Q000000981:diagnostic imaging / Q000601:surgery*; D013640:Tarsal Joints / Q000000981:diagnostic imaging / Q000601:surgery*; D055815:Young Adult