Long-term crestal bone changes in implants placed in augmented sinuses with minimal or moderate remaining alveolar bone. A 10-year retrospective case series study

Clinical Oral Implants Research
Istvan A UrbanHom-Lay Wang

Abstract

To evaluate long-term clinical and radiographic outcomes of dental implants placed after lateral window sinus augmentation utilizing the sagittal sandwich technique. Patients treated with sinus augmentation were included in this retrospective case series study. The surgical procedure was performed with particulate autogenous bone and anorganic bovine bone-derived mineral (3:7 ratio). Implants were grouped based on baseline residual alveolar ridge height: group S (residual alveolar ridge height of 0.1-3.5 mm), group M (height of 3.5-7mm), and group C (native bone). Radiographs were taken at baseline (abutment installation) and annually throughout the 10-year follow-up. A total of 86 patients (92 sinus lifts) and 209 implants were included. Ten sinus membrane perforations were recorded (11% incidence) and graft infections occurred in 3 cases (3.2% incidence). During the 10-year follow-up, 3 implants (1.4%) failed. No significant differences in the mean implant marginal bone loss (MBL) between the three groups were found after 1, 2, and 5 years follow-up (p>0.05). At 10 years, group C exhibited more MBL than group M with a mean difference of -0.53 mm (p=0.01). After 10 years, MK III implants displayed significantly more bone loss ...Continue Reading

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