Is total knee replacement done with cobalt-chrome alloy?

A knee replacement includes metal components and a bearing surface that allows the joint to move. Cobalt-chrome alloy can be used in a metal component because it is engineered for strength and wear resistance. Other parts may use a different metal, ceramic-like material or medical-grade plastic, so the phrase “cobalt-chrome knee” does not necessarily describe every component.

The surgeon considers alignment, bone quality, joint shape, previous surgery, metal sensitivity and activity goals when choosing an implant system. Read about [Cobalt-Chrome Alloy](/materials/cobalt-chrome-alloy/) and [Total Knee Replacement](/treatments/joint-replacement/total-knee-replacement/).

Tell the orthopaedic team about reactions to jewellery or other metals, previous implants, skin conditions, allergies and relevant medical problems. Ask which components contain cobalt-chrome alloy, what the other components are made of, and whether an alternative is appropriate for your history.

Request the implant name and material information for your records. Discuss the planned fixation, rehabilitation, weight-bearing instructions and follow-up imaging. Material selection should be considered alongside fit, stability and the operation itself.

Before surgery, report a new rash, infection, fever or change in your health. After surgery, seek prompt advice for increasing wound redness, drainage, fever, worsening swelling, new numbness or severe pain. Chest pain, breathlessness, fainting, a cold foot or sudden inability to walk requires urgent assessment.

Ask: Which knee components use cobalt-chrome alloy? Does my history suggest a different material? What symptoms could indicate a wound, circulation or nerve problem? Which implant details will be recorded, and when will my follow-up take place?