Aseptic loosening in cemented total hip replacement occurs as a result of hypersensitivity response to –
Correct Answer: High density polythene debris
Description: Based on the type of fixation, THR is of two types:-
i) Cemented THR: Bone cement is used to fix the prosthesis with bone.
ii) Uncemented THR: Prosthesis is directly inserted into the bone without using cement. After sometime osteointegration over prosthesis takes place.
In cemented THR, there may be loosening of the prosthesis. If it occurs without infection, it is called aseptic loosening (or osteolysis).
Particles of metal (titanium, nickel, chromium etc), cement (PMMA) and polyethene all can produce periprosthetic osteolysis (aseptic loosening); but because they are most numerous polyethene particles appear to be the major culprit.
Category:
Orthopaedics
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now