We show for the first time that imaging of osteoarthritic subchondral bone with 99mTc-sestamibi (MIBI) may be a valuable diagnostic tool to assess the severity of subchondral sclerosis. This is a report on a patient who had osteoarthritis of both knees and where MIBI was accumulated in the lesion sites. Due to the accumulation of MIBI in the bone, we believe that excessive stress had been appli...

Osteochondritis dissecans (OCD) is a pathological process affecting the subchondral bone of the knee in children and adolescents with open growth plates (juvenile OCD) and young adults with closed growth plates (adult OCD). It may lead to secondary effects on joint cartilage, such as pain, edema, possible formation of free bodies and mechanical symptoms, including joint locking. OCD may lead to...

OBJECTIVES The aim of this study was to analyse micromotion and stress distribution at the connections of implants and four types of abutments: internal hexagonal, internal octagonal, internal conical and trilobe. METHODS A three dimensional (3D) model of the left posterior mandible was reconstructed from medical datasets. Four dental implant systems were designed and analysed independently i...

In the grinding process, friction energy generated by grains and workpiece in zone will affect service life of wheel. Ultrasonic-vibration-assisted (UVAG) can reduce force generation during grinding. this work, wear mechanism wheels UVAG is discussed detail from perspective grain trajectory tribology. The results show that has a smaller than conventional (CG). Furthermore, when initial included...