الفهرس 
ANATOMYOnly 14 pages are availabe for public view
 |  | from | 16 |  |  |
| | | from | 16 | | |
Abstract
The knee is now the commonest joint to be affected by osteoarthritis and the commonest joint to be replaced . The majority of replacements are done for pain associated with arthritis.
The disease can affect one, two or the three compartments of the knee
.there are several methods of treatment, non operative and arthroscopic procedures failed .Operative treatment still master solution to relive pain associated with arthritis.
There are three surgical options for treatment, tibial osteotomy,
unicompartmental replacement or total knee replacement.
Unicompartmental knee arthroplasty was introduced in the early 1970 as atreatment option for osteoarthritis localized to one compartment.
Careful patient selection is critical for unicompartmental knee arthroplasty if reliable results are to be achieved. The disease should be predominantly confined to a single compartment.
Resurgence of the interest in the unicompartmental arthroplasty has occurred, particularly with the introduction of more physiologic new implant designs that have achieved acceptable long-term results.
Interest in the procedure was also stimulated by the introduction of the minimally invasive technique .A major advantage of a unicompartmental arthroplasty is that it can be performed through a relatively small incision which need not be extended into the quadriceps tendon. The minimally invasive technique has the potential to reduce the morbidity,
complications , and length of hospital stay.
Failure of a unicompartmental arthroplasty may occur as a result of inappropriate patient selection , poor soft tissue balancing or malposition of the component.
Revision to TKR is generally straight forward. Bone defects occur infrequently and can easily be reconstructed by available bone graft or the use of modular prostheses.
Advantage of UKA include preservation of uninvolved tissue and bone,
reduced operative time, better range of motion, improved gait, and increased patient satisfaction.
Many now view unicompartmental knee arthroplasty as preferable to high tibial osteotomy (HTO) in relatively young patients with medial compartment arthritis.
With appropriate patient selection , carful surgical technique, and proper implant design,unicompartmental knee arthroplasty can now be viewed as a procedure with reliable medium-to long- term success.