[Fracture Type and Injury-to-Surgery Interval as Risk Factors for XXXX of the Femoral Head after Internal Fixation of Intracapsular @entity2249 ].

@entity1 @entity2249 @entity174 @entity3330 @entity2530
UNASSIGNED: PURPOSE OF THE STUDY The aim of the study was to investigate the occurrence of @entity2530 ( @entity2530 ) of the femoral head following the osteosynthesis of intracapsular @entity174 of the femoral neck in relation to the time interval between injury and surgery and the type of @entity174 . MATERIAL AND METHODS The data of @entity1 with intracapsular @entity174 of the femoral neck surgically treated in the period from 2001 to 2011 were reviewed. Of 1555 @entity1 treated for this @entity174 , 125 (7%) underwent osteosynthesis. The evaluated group included 115 @entity1 who came for examination at one-year follow-up. There were 59 (52%) @entity1 and 56 (48%) @entity1 . Dynamic hip screw (DHS) osteosynthesis with an anti-rotation screw was performed in 103 @entity1 and lag-screw osteosynthesis involving three parallel cannulated cancellous screws was employed in 12 @entity1 . The @entity1 were allocated to groups according to the injury-to-surgery interval and to sub-groups on the basis of the Garden classification of femoral @entity174 stage. RESULTS In the group of 58 @entity1 treated within 6 h of injury, @entity2530 developed in 10 (17%). When the type of @entity174 was considered, 4% of the non-displaced @entity174 and 30% of the displaced @entity174 developed @entity2530 . The @entity1 with Garden stage I and II (non-displaced) @entity174 treated within 6 h of injury had a significantly lower risk of @entity2530 development than those with Garden stage III or IV (displaced) @entity174 . The group treated between 6 and 24 post-injury hours comprised 21 @entity1 , of whom four (19%) had @entity2530 . In non-displaced and displaced @entity174 sub-groups, 25% of the @entity1 in the former and 16% in the latter had @entity2530 . The stage of displacement had no effect on @entity2530 development. The two groups together ( @entity1 treated by 24 h) had a significantly lower @entity2530 incidence than the @entity1 treated after 24 h (p = 0.0025). In this group of 36 @entity1 , 16 had @entity2530 (44%) and the @entity174 stage made no significant difference (p = 0.6985; nondisplacement sub-group, 41%; displacement sub-group, 55%). CONCLUSIONS The study showed a significantly lower @entity2530 occurrence in the @entity1 surgically treated within 24 h of injury. In the @entity1 treated within 6 h of injury, @entity2530 incidence was significantly lower in the @entity1 with non-displaced @entity174 , as compared with those who had displaced @entity174 . This was not true for the two @entity1 groups treated later (6-24 and later than 24 h) in which the differences between @entity2530 development after non-displaced @entity174 and that after displaced @entity174 were similar. Key words: @entity2530 , @entity2249 , @entity3330 .
