However, recently, most described techniques for posterior atrophic maxillary rehabilitation, are targeting more conservative, cost-effective and efficient methods for sinus elevation eliminating its lateral access. The aim of the present study is to evaluate and compare the long-term implant stability for implants placed by the novel crestal sinus approach versus osseodensification using Densa-bur in Atrophic Posterior Maxilla.
Edentulous atrophic posterior maxillary ridge.
Residual alveolar ridge height within 5-6 mm.
At least 2mm band of keratinized tissue.
Patients with good oral hygiene.
Medically compromised patients.
Smokers.
Pregnant females.
Patients with active periodontal disease.