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sinus lifting external approach operation

Sinus lifting KEY POINTS Grafting of the maxillary sinus is the most commonly used and a very predictable procedure for vertical bone augmentation in the posterior segment of the edentulous maxilla Sinus floor augmentation is either performed by an external or an internal (transcrestal) approach Sinus floor augmentation can be performed with immediate or delayed implant placement (in terms of primary implant stability) Bone substitute materials are as effective as autogenous bone for sinus floor augmentation. Indications Less than 4-6 mm of vertical residual bone height in the posterior segment of the maxilla is an indication for a sinus augmentation procedure [Esposito]. External approach The external access to the maxillary sinus is carried out at a lateral buccal alveolar aspect, the Schneiderian membrane is elevated and the resulting space filled with a bone graft or bone substitute [Esposito, Schmitt]. Implants can be placed immediately with sinus augmentation or delayed. An advantage of the external approach is the good overview. Whether the external window needs to be covered by a membrane is currently under debate. Internal approach The internal approach is carried out through the implant bed. After initial drilling the Schneiderian membrane is elevated transcrestally, i.e. with osteotomes and the resulting space is filled with a bone graft or bone substitute. This is followed by implant placement. Significantly more vertical bone height can be gained with a lateral sinuslift approach [Esposito 2010]. sinus lifting external approach operation#dr.anwar.alabdullah#sinus_lifting