Operative tips 261

Fig. 7-5. A paralleling device attached to contra-angle.

Fig. 7-8. It is frequently impossible to correctly angle drilling tools with a straight handpiece.

Fig. 7-6. Two different types of paralleling devices. (The hollow acrylic template device [top] and the hollow tube template device [bottom] courtesy S. Tramonte.)

Fig. 7-7. Radiographic interpretation of an implant site is not always adequate because it is not three-dimensional. A tap has perforated the lingual plate of bone below the mylohyoid ridge.

Fig. 7-9. The artificial socket must be made midway between both plates of cortical bone.