Carranza’s Clinical Periodontology Twelfth Edition-Chapter 74-4

Caption: Figure 74-4: Diagram demonstrating the anterior–posterior implant spread (defined as the distance from the middle of the most anterior implant to the distal edge of the most posterior implant).

Insight: The maxillary sinus limits the amount of bone available for implant placement in the posterior region. As a result, implant placement is confined to the anterior region, and the AP spread that can be achieved is often limited. If the AP spread is inadequate to provide support, a full-palatal-coverage overlay denture is often recommended.

Carranza’s Clinical Periodontology, 12th Ed
Chapter 74.
Biomechanics, Prosthetic Considerations, and Treatment Planning
Evelyn Chung, Ting-Ling Chang, and Perry R. Klokkevold