INTRODUCTION: Orthopaedic surgeons have focused on improving the functional and structural outcomes of arthroscopic rotator cuff repair and labral repair through the development of biomechanically superior surgical techniques such as double-row fixation, suture-bridge fixation, and compression double-row fixation. To obtain the maximum benefit from these repair techniques, secure knot tying is ...

During insertion of the double lumen tube in patients with cervical vertebral fixation, the cervical neutral position should be maintained. Although flexible fiberoptic bronchoscopic intubation is the gold standard, novel techniques are needed to facilitate intubation of patients with cervical vertebral fixation in neutral position according to institutional capabilities. In this case report, i...

BACKGROUND In anterior cruciate ligament reconstruction performed using cortical button fixation on the femur, we have observed a "wobble" effect that can occur when a cannulated femoral drill is used over a guide pin that is not securely fixed in bone. Our study assessed the effect of drill "wobble" on femoral tunnel aperture in sawbones. METHODS Femoral tunnels were drilled in sawbones, whi...

We investigated the interaction of recombination and selection on the process of fixation of two linked loci with epistatic interactions in fitness. We consider both the probability of fixation of newly arising mutants (the static model) and the time to fixation under continued mutation (the dynamic model). Our results show that the fixation of a new advantageous combination is facilitated by h...

BACKGROUND Arthroscopic rotator cuff repair is a common procedure that is gaining wide acceptance among orthopaedic surgeons because it is less invasive than open repair techniques. However, there is little consensus on whether to employ single-row or double-row fixation. The purpose of the present study was to systematically review the English-language literature to see if there is a differenc...

BACKGROUND During the early postoperative period, the fixation of a hamstring graft to the bone tunnel is the primary factor in limiting rehabilitation. HYPOTHESIS The initial fixation strength of a double cross pin fixation technique is comparable with the biodegradable interference screw fixation technique. STUDY DESIGN Experimental laboratory study. METHODS The authors examined the ini...

The arithmetic-coding-based communication system, Dasher, can be driven by a single switch. In MacKay et al. (2004), we proposed two versions of one-button Dasher, ‘static’ and ‘dynamic’, aimed at a theoretical model of a user who can click with timing precision g, and who requires a recovery time D between clicks. While developing and testing those two versions we invented a third way of using...