title: Biceps tenodesis with interference screw: cyclic testing of different techniques.
abstract: Different surgical techniques exist for biceps tenodesis. The most secure fixation technique is with interference screws. The purpose of the study was to compare the biomechanical performance of three different interference screw biceps tenodesis fixation methods, which involve different tunnel preparation methods. Using a sheep shoulder model and metal interference screws, a bone wedge technique was compared to serial tunnel dilation and a control group. After a preload, all repairs were cyclically loaded (20-60 N) for 100 cycles followed by destructive testing. Biceps tenodesis using an interference screw--bone wedge technique showed statistically lower cyclic displacement (8.1 ± 6.4 mm) than serial dilatation with an interference screw (21.3 ± 8.4 mm) or interference screw fixation alone (18.3 ± 8.3 mm) (P = 0.02). There were no statistically significant differences in ultimate failure strength for any of the interference screw biceps tenodesis techniques tested. The tunnel preparation method chosen for interference screw fixed biceps tenodesis can have a positive effect on tenodesis performance. Using the bone wedge technique may allow a more rapid rehabilitation program applicable for the traumatic biceps tendon rupture seen in young, athletic patients with high demands.
authors.affiliation: Çelikkent Sitesi, A-2 No: 6 Çayyolu, Ankara, Turkey. onurhapa@gmail.com
authors.forename: Onur
authors.initials: O
authors.lastname: Hapa
authors.forename: Cüneyd
authors.initials: C
authors.lastname: Günay
authors.forename: Erkam
authors.initials: E
authors.lastname: Kömürcü
authors.forename: Hüsamettin
authors.initials: H
authors.lastname: Cakıcı
authors.forename: Ergun
authors.initials: E
authors.lastname: Bozdağ
mesh_terms: D000818:Animals; D001863:Bone Screws; D005260:Female; D008422:Materials Testing; D023421:Models, Animal; D019637:Orthopedic Procedures; D012756:Sheep; D013314:Stress, Mechanical; D053656:Tenodesis / Q000295:instrumentation*