title: Computer-assisted femoral head-neck osteochondroplasty using a surgical milling device an in vitro accuracy study.
abstract: Surgical navigation might increase the safety of osteochondroplasty procedures in patients with femoroacetabular impingement. Feasibility and accuracy of navigation of a surgical reaming device were assessed. Three-dimensional models of 18 identical sawbone femora and 5 cadaver hips were created. Custom software was used to plan and perform repeated computer-assisted osteochondroplasty procedures using a navigated burr. Postoperative 3-dimensional models were created and compared with the preoperative models. A Bland-Altmann analysis assessing α angle and offset ratio accuracy showed even distribution along the zero line with narrow confidence intervals. No differences in α angle and offset ratio accuracy (P = 0.486 and P = 0.2) were detected between both observers. Planning and conduction of navigated osteochondroplasty using a surgical reaming device is feasible and accurate.
authors.affiliation: Department of Orthopedic Surgery, Inselspital, University of Berne, Switzerland.
authors.forename: Timo M
authors.initials: TM
authors.lastname: Ecker
authors.forename: Marc
authors.initials: M
authors.lastname: Puls
authors.forename: Simon D
authors.initials: SD
authors.lastname: Steppacher
authors.forename: Johannes D
authors.initials: JD
authors.lastname: Bastian
authors.forename: Marius J B
authors.initials: MJ
authors.lastname: Keel
authors.forename: Klaus A
authors.initials: KA
authors.lastname: Siebenrock
authors.forename: Moritz
authors.initials: M
authors.lastname: Tannast
mesh_terms: D001182:Arthroscopy / Q000295:instrumentation / Q000379:methods; D002102:Cadaver; D005240:Feasibility Studies; D057925:Femoracetabular Impingement / Q000601:surgery*; D005270:Femur Head / Q000601:surgery*; D005272:Femur Neck / Q000601:surgery*; D006621:Hip Joint / Q000601:surgery; D006801:Humans; D066298:In Vitro Techniques; D008953:Models, Anatomic; D008954:Models, Biological; D015588:Observer Variation; D019637:Orthopedic Procedures / Q000295:instrumentation* / Q000379:methods*; D016059:Range of Motion, Articular; D012984:Software; D025321:Surgery, Computer-Assisted / Q000295:instrumentation* / Q000379:methods*