October 6 University, Cairo Egypt
Title: Survivor-ship Analysis of Arthroplasty Procedures
Objective: To evaluate the 10-year outcome of this register in view of revision rate and complications.
Materials and methods: In this analysis, we included THA and TKA cases since 2007. We identified cases with primary index was recorded in this register whether the revision was recorded in the register or was done in other hospitals which are not included in this registry. TKA and THA with a ratio: 1.39 to 1.0. Implants used were from J & J, Zimmer, Stryker, Biomet, Link, Corrin, Samoa, Implant Cast, Implant International, Surgical and Hippocrates. Kaplan Myers test was used for survivorship analysis.
Results: For THA: Mean age was 51 years (19-86), Female to male ratio was 1.15:1. Indications were paeds hip diseases, failed ORIF of # NoF, AVN, posttraumatic and OA. Uncemented THA was 85%, Cemented 10% and hybrid 5%. Primary THA was 49%, complex primary 30%, while revision 21%.
For TKA: A female to male ratio was 3.14:1. The Indication was OA in 73%. 47% had severe varus and 15 17% had significant bone defect. Both THA and TKA had a revision rate of 2% and their implants were made by 8 companies. The incidence of infection was 2 % in the absence of laminar flow, space gown and pulse lavage. Hip and knee instrumentation systems are not stocked in hospitals and they are used as loan on a case per case basis. Unexpected results are unnecessarily to be surgeon-dependent but could be also due to young age and indications for THA other than OA, the high % of complex THA & TKA due to late presentations and complex pathology.