even though intervertebral disc degeneration can be found in the natural course of alkaptonuria, detection of the disease by black disc color change in a patient without any other presentation of alkaptonuria is an exceptionally rare condition. we have reported a very rare case of alkaptonuria presented with low back pain and steppage gait in a 51-year-old male with a complaint of chronic low-b...

Introduction: This in-vitro study investigates the bond strength of different zirconia composites  with three different modern adhesive systems after artificial aging using thermocycling and water storage. Methods: A total of 90 specimens of zirconia (InCoris, Sirona, Germany, Bernsheim) were ground using a 165 µm grit rotating diamond disc. Thirty specimens were additionally treated with eithe...

surgery for Medicare patients over the age of 60 seems cynical. There may be no definitive proof that mobility of a particular segment delays, mitigates or prevents adjacent segment degeneration, but there is proof that the proper use of lumbar artificial disc does provide similar clinical outcomes (as does lumbar fusion) and patients recover more quickly from surgery. michael_hobert (lifenet.org)

This report describes a 49-year-old woman who presented with a myeloradiculopathy with two-level spinal cord compression. She underwent C5-6 and C6-7 anterior cervical decompressions and placement of two Bryan disc (Medtronic Sofamor-Danek. Memphis, TN) prostheses. Whilst single-level cervical arthroplasty using the Bryan disc prosthesis has been described before, this is the first two-level ca...

Cervical arthroplasty after anterior decompression with insertion of a prosthetic total disc replacement has been suggested as an alternate to anterior cervical fusion. Currently there are four cervical arthroplasty devices available on the market whose results in clinical use have been reported. Each device varies in terms of materials, range of motion, insertion technique and constraint. It i...

STUDY DESIGN This study presents data on 67 patients from 2 study sites involved in the multicenter, prospective, randomized, controlled investigational device exemption study of FlexiCore artificial disc replacement versus fusion with a 2-year follow-up. OBJECTIVE To compare the outcomes achieved with the FlexiCore disc replacement versus standard circumferential fusion for the treatment of ...

Context. The formation of resonant pairs of planets in exoplanetary systems involves planetary migration in the protoplanetary disc. After a resonant capture, the subsequent migration in this configuration leads to a large increase of planetary eccentricities if no damping mechanism is applied. This has led to the conclusion that the migration of resonant planetary systems cannot occur over lar...