The evolution of dental implants 139

Fig. 5-6. One of the Strocks' earliest experiments, done in 1938 on a dog. A, The area previous to insertion; B, immediately after insertion. C, There is no sign of inflammation or abnormality about 6 weeks later. D through G, Filling in of bone from 2 to 9 months after insertion. H, The screw is shown several months after insertion. (From Strock, M. S., and Strock, A. E.: Further studies on the implantation of inert metals for tooth replacement, Alpha Omegan, September, 1949.)