27 cases of femoral neck fractures which were treated in department of orthopaedic surgery of CNUH from 1979 Jan, to 1985 Jan. were analysed clinically and radiologically. Very sensitive, noninvasive, simple and easily reproducible bone scanning with 99m Tc was introduced for early diagnosis of avascular necrosis as a complication of femoral neck fracture.
The results were as follows:
1. The most common cause of fracture was slipping and falling down.
2. In classifiaction, transcervical and subcapital fractures were most common in anatomical classification, Pauwels´ type I in Pauwels´ classification and Garden stage 3 in displacement.
3. Singh index was decreased according to increase of physiological age.
4. Avascular necrosis develops commonly in Pawels´ type 3, Garden´s stage 4 and subcapital fracture.
5. Satisfactory results were obtained 75% in internal fixation and 85% in head replacement.
6. Bone scan is considered to he significant technique for early detection of vascular impairment to the femoral head after femur neck fracture, and is important in selecting the method of treatment according to results of bone scan.
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