Traumatic fracture of the polyethylene tibial post and cone in a posterior-stabilized total knee arthroplasty: A case report.

Introduction And Importance: Very few reports addressed polyethylene tibial post and cone fractures requiring revision surgery. Up to our knowledge, this particular pattern of wear, involving 2 fracture areas simultaneously, has not been previously described.

Case Presentation: A 70 year-old female developed a fracture involving both the tibial insert post and cone after a minor trauma after undergoing posterior-stabilized total knee replacement 4 years prior.

Bilateral trochlear avascular necrosis: A case report and brief review of the literature.

Introduction And Importance: Trochlear AVN is a very rare entity with only a limited number of cases being reported.

Case Presentation: Our case is interesting as it presents a case of an incidentally found bilateral trochlear AVN in a 12 year-old child when he presented with an undisplaced right supracondylar fracture.

Clinical Discussion: It is highly likely that an unknown underlying predisposing factor, possibly recurrent microtrauma, was responsible for the bilateral occurrence.