الفهرس 
Introduction
ANATOMY OF THE KNEEOnly 14 pages are availabe for public view
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Abstract
One of the complications and major reasons for patient’s dissatisfaction after TKA is tibial component mal-alignment. Tibial component malalignment during TKA can jeopardize the knee stability.
Although the optimal value of the tibial component alignment remains unclear and the best method for assessing this parameter remains controversial, but general agreement that excessive varus/valgus and anteroposterior malalignment of the tibial component, which alter the tibial slope, are undesirable
Our study consisted of 2 groups of 94 knees operated on TKA by either intramedullary or extramedullary technique which was left according to surgeon preference. The Center has retained constant. Surgery was undertaken using the standard techniques as described by the manufacturers in the operative techniques manuals by the same 7 surgeons. The researcher measuring these angles had not been involved in the surgery and didn’t know to which group the patients belonged.
The Intramedullary group consisted of 60 patients and the extramedullary group was 34 patients, all were suffering primary osteoarthritis except for 1 patient who was suffering secondary osteoarthritis.Our results showed postoperative TCA 1 ranged from 0.02° to 3.95° and TCA 2 ranged from 0 to 4.87 with mean for TCA1 and TCA 2 of 1.4923 and 1.6922 respectively .Percentage of correct TCA for the intramedullary group was 75% while for extramedullary group was 76.5%.
Our work result has shown that there was no difference in tibial alignment in both coronal and sagittal planes with the use of either intramedullary or extramedullary guides.We concluded that the usage of intramedullary or extramedullary tibial guides / jigs in performing tibial cuts prior to placement of the tibial component will have no significant effect on neither the tibial component varus/valgus alignment nor the tibial slope. Both techniques proved accurate in producing satisfactory postoperative tibial component alignment angles and most surgeon can continue to use their preferred technique to achieve good post-operative results as we have found in our center.