Effect Of PRF Versus Xenograft In Closed Sinus Lift.

Prf Controlled, Randamized Clinical Trial of THE EFFECT OF PLATELET RICH FIBRIN( PRF ) VERSUS XENOGRAFT IN CLOSED SINUS LIFT AND IMLANT PLACEMENT ON IMPLANT STABILITY IN PATIENTS WITH MISSING MAXILLARY PREMOLAR.

Indirect sinus lift with used PRF as a graft material versus xenograft

Crestal incision and reflect the tissue until exposure of the bone, then use drilling to make osteotomy. Then use sutable osteotomes to elevate the sinus floor, then pack of Prf or bone graft in the osteotomy and implant placement . Then closed the flap and suturing.

Inclusion Criteria:

• Edentulous area and bone high at least 5-6 mm below the maxillary sinus at maxillary premolar.
• Good oral hygiene.

Exclusion Criteria:

• bad oral hygiene.
• patient with systemic disease that may affect normal healing
• pregnant patients.
• patients with bone diseases and presence of periapical pathology affecting the neighboring teeth.
• Heavy smoker more than 20 cigarettes per day