800-Implant Retrospective Analysis – Poster

A Retrospective Analysis of the Anterior-Posterior Spread to Distal Cantilever Length Relationship in Temporary and Definitive Prostheses Following the All-on-4 Protocol

Thomas J. Balshi, DDS, PhD, FACP 1
Glenn J. Wolfinger, DMD, FACP 1
Robert W. Slauch, BS1 2
Stephen F. Balshi, MBE

1) PI Dental Center at the Institute for Facial Esthetics; Fort Washington, Pennsylvania
2) University of Maryland, Baltimore, College of Dental Surgery; Baltimore, Maryland

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A 1990 report by English proposed a biomechanical relationship between the anterior-posterior (AP) spread and the distal cantilever lengths of an implant-supported prosthesis. His guidelines suggest a cantilever can extend off the distal abutment a maximum length of 1.5 times the respective AP spread before it becomes biomechanically unfavorable. The purpose of this retrospective study is to examine the temporary and definitive prostheses in patients treated with the All-on-4® protocol in a single private practice and determine if there is a significant correlation between a violation of the anterior-posterior rule and patients experiencing mechanical and biomechanical complications.

The Zygomatic or Pterygoid Implant: Guided & Unguided Strategies is presented by Dr. Thomas Balshi.

The use of zygomatic and pterygoid implants provides patients with extreme maxillary atrophy a biomechanically sound, fixed, screw-retained prosthesis using the Teeth In A Day® protocol in conjunction with computer guided surgery. Remote implant anchorage can offer rapid treatment for individuals who otherwise would require extensive bone grafting with sinus elevations and onlay grafts.

Dr. Glenn Wolfinger and Dr. Thomas Balshi at New Beauty Magazine display during ACP Annual Session.

Pi Dental Center, Fort Washington, PA