الفهرس 
Chapter (1): Cemented Femoral Fixation in THAOnly 14 pages are availabe for public view
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Abstract
THA is the operation of century. The best design for THA has been a topic of constant debate.
THA revision rate has significantly increased in the last years. It represents a burden to patients, surgeons, and the health care system.
Forty-five patients were included in this study and divided into 2 groups; group A (Revision after short stem (n=15) and group B which is divided into 2 subgroups:
o group B1: Revision after cementless stem (n=15)
o group B2: Revision after cemented stem(n=15)
The mean age and the ASA grade were significantly lower in group A.
Early stem subsidence (40%) was the main indication in group A compared to PFFs (73.3%) and aseptic loosening (53.3%) in group B1 and B2 respectively.
The mean time to revision was significantly shorter in group A (15 months) compared to 95.33 and 189.40 months in group B1and B2 respectively.
Sixty % (9 patients) in group A were revised in the first year while all patients in group B2 were revised in more than 5 years.
Cementless stems have a higher risk for PFFs.
Cemented THA has the highest longevity.
The mean operative time was significantly shorter in group A (77.13 minutes) compared to group B1(134 minutes) and B2 (157.33 minutes).
The mean intraoperative blood loss was significantly lower in group A (300 cc) compared to group B1and B2 (750 cc).
The need for postoperative blood transfusion was significantly lower in group A (0%) compared to group B1 (53.3 %) and B2 (46.7 %).
All patients in group A were classified as Paprosky I on revision and no patient needed IBG.
The mean hospital stay duration was significantly shorter in group A (2.13 days) compared to 6.33 and 8.47 days in groups B1 and B2 respectively.
Revisions in group A were done using either short stem (2 patients) or conventional stem (13 patients) whilst 12 patients needed long stem and 3 patients needed conventional stem in either group B1 or B2.
This study showed that the revision of short stem THA resembled the primary THA.
The mean postoperative HHS at the latest follow up was 87.07, 87.53 and 85.47 in group A, B1 and B2 respectively.
The mean subsidence was 1.93, 3.53 and 2.67 mm in group A, B1 and B2 respectively.
All PFFS had excellent results according to Beal’s and Tower’s criteria; all fractures healed and the implants were stable.