164 Theories and techniques of oral implantology

Fig. 5-59. Chercheve claims that using three screws instead of two gives much better results with the vertical transfixation technique. (From Linkow, L. I.: Clinical evaluation of the various designed endosseous implants, J. Oral Implant Transplant Surg. 12:42, 1966.)

Fig. 5-60. Christensen's special jig for creating the sites for his transfixation screws. These screws may or may not be parallel, depending on the architecture of the individual's mandible. It is more important that the screws emerge at the alveolar crest than that they be parallel. (Courtesy R. W. Christensen.)