Sinus-lift by Use of Hemihydrate-Calcium Sulphate: A Prospective Clinical, Radiographical, Histological Study of Implant Integration in the Posterior Maxilla

• The objective of this study was to evaluate implant survival in reconstructed bone after the use of a synthetic bone substitute material (Calcium Sulphate). Clinical, radiological and histological parameters were studied in 25 patients. Unilateral and bilateral sinus augmentation was performed. An 80% + 20% mixed alpha hemihydrate Calcium Sulphate with autograph bone respectively was applied into the maxillary sinus. After six months, dental implants were installed. Prior to implant installation, all patients underwent a CT examination. In total 91 implants were inserted in all 25 subjects, 74 of these in augmented bone. Additionally, two micro-implants were installed bilaterally in 8 patients. After four months of healing, a third operation was performed to insert the healing abutments into the implants. Simultaneously, the micro-implants were retrieved for histological analysis. Implant stability was assessed through resonance frequency analysis at installation and at abutment connection. The pattern of bone formation in the experimental sites was investigated using histomorphometric measurements. Implant survival rate was 96,8% at abutment connection. The mean ISQ value at implant placement was 65.8 and at abutment connection 66,5. The mean bone to implant contact was 27,0%.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Odontologi (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Dentistry (hsv//eng)

Keyword

Calcium Sulphate; Bone Substitute; Sinus Augmentation; Dental Implants; Prospective; Clinical Study

Publication and Content Type

ref (subject category)

art (subject category)