Vertikale Distraktion in der ästhetischen Zone nach .
the implants. Radiographically, the distal implant appears to be pro-jected to the sinus cavity, a bony perforation was excluded by appro-priate exploration and proper planning before treatment (DVT). 73 M. Seiler et al.: Vertikale Distraktion in der ästhetischen Zone nach Implantatve