 Next, the 2.5 mm drill bed was then used to sequentially drill holes to full depth and 4.0 cancellous screws were placed in each, each with a 45 mm in length. 
Next , the 2.5 mm drill bed was then used to sequentially drill holes to full depth and 4.0 cancellous screws were placed in each , each with a 45 mm in length .