Three-dimensional diagnostic assessments have a decisive value in presurgical treatment planning, especially in situations in which the alveolar process has pronounced resorption, and therefore insufficient bone volume for placing endosseous implants.

Follow a CBCT evaluation, it seems appropriate to underline the need for each candidate of a sinus lift operation to first undergo a careful clinical history investigation. If necessary, suitable specialist collaboration (otorhinolaryngologist) must be requested. It can be concluded that, with current knowledge.