title: Early results using a biodegradable magnesium screw for modified chevron osteotomies.
abstract: This is the first larger study analyzing the use of magnesium-based screws for fixation of modified Chevron osteotomies in hallux valgus surgery. Forty-four patients (45 feet) were included in this prospective study. A modified Chevron osteotomy was performed on every patient and a magnesium screw used for fixation. The mean clinical follow up was 21.4 weeks. The mean age of the patients was 45.5 years. Forty patients could be provided with the implant, in four patients the surgeon decided to change to a standard metallic implant. The AOFAS, FAAM and pain NRS-scale improved markedly. The hallux valgus angle, intermetatarsal angle and sesamoid position improved significantly. Seven patients showed dorsal subluxation, rotation or medial shifting of the metatarsal heads within the first 3 months. One of these patients was revised, in all others the findings were considered clinically not significant or the patients refused revision. This study shows the feasibility of using magnesium screws in hallux valgus-surgery. Surgeons starting with the use of these implants should be aware of the proper handling of these implants and should know about corrosion effects during healing and its radiographic appearance. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 34:2207-2214, 2016.
authors.affiliation: Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries Strasse 1-7, 30625 Hannover, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Plaass
authors.affiliation: Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries Strasse 1-7, 30625 Hannover, Germany.
authors.forename: Sarah
authors.initials: S
authors.lastname: Ettinger
authors.affiliation: Institute for Radiology, Hannover Medical School, Carl-Neuberg Strasse 1, 30625, Hannover, Germany.
authors.forename: Lena
authors.initials: L
authors.lastname: Sonnow
authors.affiliation: Department for Plastic, Aesthetic, Hand and Reconstructive Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany.
authors.forename: Soeren
authors.initials: S
authors.lastname: Koenneker
authors.affiliation: Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries Strasse 1-7, 30625 Hannover, Germany.
authors.forename: Yvonne
authors.initials: Y
authors.lastname: Noll
authors.affiliation: Laboratory of Biomechanics and Biomaterials, Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Strasse 1-7, Hannover, Germany.|CrossBIT, Centre for Biocompatibility and Implant-Immunology, Department of Orthopedic Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1-7, 30625, Hannover, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Weizbauer
authors.affiliation: Laboratory of Biomechanics and Biomaterials, Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Strasse 1-7, Hannover, Germany.|CrossBIT, Centre for Biocompatibility and Implant-Immunology, Department of Orthopedic Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1-7, 30625, Hannover, Germany.
authors.forename: Janin
authors.initials: J
authors.lastname: Reifenrath
authors.affiliation: Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries Strasse 1-7, 30625 Hannover, Germany.
authors.forename: Leif
authors.initials: L
authors.lastname: Claassen
authors.affiliation: Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries Strasse 1-7, 30625 Hannover, Germany.
authors.forename: Kiriakos
authors.initials: K
authors.lastname: Daniilidis
authors.affiliation: Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries Strasse 1-7, 30625 Hannover, Germany.
authors.forename: Christina
authors.initials: C
authors.lastname: Stukenborg-Colsman
authors.affiliation: Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries Strasse 1-7, 30625 Hannover, Germany.
authors.forename: Henning
authors.initials: H
authors.lastname: Windhagen
mesh_terms: D020341:Absorbable Implants; D000328:Adult; D000368:Aged; D001863:Bone Screws; D005240:Feasibility Studies; D005260:Female; D006215:Hallux Valgus / Q000601:surgery*; D006801:Humans; D008274:Magnesium; D008297:Male; D008875:Middle Aged; D010027:Osteotomy / Q000295:instrumentation*; D055815:Young Adult
chemical_list: D008274:Magnesium
keywords: Chevron; biodegradable implant; hallux valgus; magnesium