Delayed onset bioabsorbable screw reaction, intact screw extrusion and tibial tunnel osteomyelitis years after arthroscopic anterior cruciate ligament reconstruction using hamstring graft.

Postoperative reaction and infection after anterior cruciate ligament (ACL) reconstruction is a rare complication. We report two cases of bioabsorbable screw extrusion and tibial tunnel infection in 17/18-year-old men, 2 and 4 years after ACL reconstruction, respectively. They underwent tibial tunnel debridement, removal of the still intact poly-L-D-lactic acid bioabsorbable screw and subsequent wound closure.

Patellofemoral full-thickness chondral defects treated with second-generation autologous chondrocyte implantation: results at 5 years' follow-up.

Background: Patellofemoral lesions represent a very troublesome condition to treat for orthopaedic surgeons; however, second-generation autologous chondrocyte implantation (ACI) seems to offer an interesting treatment option with satisfactory results at short-term follow-up.

Hypothesis: Hyaluronan-based scaffold seeded with autologous chondrocytes is a viable treatment for the damaged articular surface of the patellofemoral joint.

Study Design: Case series; Level of evidence, 4.

Biological approaches for cartilage repair.

The social impact of bone and cartilage pathologies entails high costs in terms of therapeutic treatments and loss of income. As a result, the current research trend includes preventive interventions and therapeutic solutions that can lead to an enhancement of tissue regeneration and the reduction of degenerative mechanisms. Many options have been made available to address problems regarding cartilage damage, each with its own advantages and disadvantages.

Primary repair combined with bone marrow stimulation in acute anterior cruciate ligament lesions: results in a group of athletes.

Background: The anterior cruciate ligament has been shown to have poor healing ability, and reconstruction is the standard treatment.

Hypothesis: Primary anterior cruciate ligament repair combined with bone marrow stimulation could restore stability and function in athletes with acute anterior cruciate ligament incomplete tears.

Study Design: Case series; Level of evidence, 4.