Radiographic and Histological Assessment of GBR Using DBB Compared to Spontaneous Bone Regeneration of Maxillary Defects , Resulted from Enucleation of Intra-bony Cystic Lesions

"stage 1 surgery:~1. after administration of Local anesthesia (articaine hydrochloride 68 mg/1.7 ml + adrenaline 0.017 mg/1.7 ml injectable solution), sulcular incision will be done , extending two teeth beyond the area of interest followed by two oblique incisions on either side of the flap~2. after flap elevation, enucleation of the cystic lesion and extraction of the non-restorable teeth related to the lesion will be done.~3. titanium mesh will be tailored with 3 mm overlap at the edges to cover the bone window completely and fixed to the bone using mono-cortical titanium screws.~This will be followed by:~* proper decompression of soft tissue to achieve tension-reduced suture.~* Primary closure will be performed using 4-0 vicryl sutures.~* Sutures will be removed one week postoperatively. stage 2 surgery(after 6 months):~ 1. titanium mesh and screws will be removed.~ 2. core biopsy will be obtained for histological assessment~ 3. implant/s placement."

"stage 1 surgery after cyst enucleation and extraction of the non-restorable teeth related to the lesion, The intra-bony defect will be filled with Deproteinized Bovine Bone.~* Titanium mesh will be tailored with 3mm overlap at the edges to cover the bone window completely and fixed to the bone using mono-cortical titanium screws. This will be followed by:~* proper decompression of soft tissue will be applied to achieve tension-reduced suture.~* Primary closure will be performed using 4-0 vicryl sutures.~* Sutures will be removed one week postoperatively. stage 2 surgery(6 months later) :~ 1. titanium mesh will be removed.~ 2. core biopsy will be obtained for histological assessment.~ 3. implant/s placement."