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. Issue 1 (26th December 2020)

• Record Type: Journal Article
• Authors: Urban, Istvan A.; Ravidà, Andrea; Saleh, Muhammad H.A.; Galli, Matthew; Lozada, Jaime; Farkasdi, Sandor; Wang, Hom‐Lay
• Is Part Of: Clinical oral implants research. Volume 32:Issue 1(2021)
• Page Start: 60
• Page End: 74
• Publication Date: 2020-12-26
• Subjects: clinical trial -- dental implants -- posterior maxilla -- sinus grafting -- staged procedure; Dental implants -- Research -- Periodicals; 617.69
• DOI: 10.1111/clr.13680
• Languages: English
• ISSNs: 0905-7161

Abstract

Abstract: Objectives: To evaluate long‐term clinical and radiographic outcomes of dental implants placed after lateral window sinus augmentation utilizing the sagittal sandwich technique. Materials and Methods: 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. Results: 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‐year follow‐up ( p > .05). At 10 years, group C exhibited more MBL than group M with a mean difference of −0.53 mm ( p = .01). After 10 years, MK III implants displayed significantly more bone loss in native bone than those in augmented bone with a mean difference of 0.48 mm ( p = .02). Five patients and 7 implants developed peri‐implantitis with no significant differences between the groups ( p = .570). Conclusion: Implant placement after two‐stage sinus grafting utilizing the sagittal sandwich technique is a relatively safe and predictable procedure with minimal complications and MBL after 10‐year follow‐up.