Objective:Tostudy the MRI with X-ray in the ability of bony generation by the way of the experiment of repairing bone defects with n-HA/PA66. Methods:30 New Zealand rabbits were avalued whose condyle of tibia in one side was performed boring which was 3mm diameter and 5mm depth with n-HA/PA66 composite implanting. The specimens were taken respectively in different times:2nd 4th 6th 8th 12th week after surgery

and were examined by the methods of plain roentgenography、histology and magnetic resonance imaging. Results:(1)MRI and X-ray:From the 4th week

n-HA/PA66 composite had the poor defined border and the signal inter-material had become more variform

more obvious enhancement

at the same time in the X-ray

there were more and more bony generation(.2)The histology showed that a layer of interface membrane forming. From the 4th week

The interface membrane had been widest and the number of cells was increasing. Till the 12th week

there were some bone trabecula formed and the HA were separated into small islands

more osteoclasts appeared. Conclusion:The experimental results showthat the perfect radiology technique is useful to predict the bone transplantation. Furthermore it is easy to operate in clinical setting

and the n-HA/PA66 Composite has the attribute of good biocompatility and osteoconductibity

which can be manifested by plain roentgenography and magnetic resonance imaging.