Single-crown restorations supported by short implants (6 mm) compared with standard-length implants (13 mm) in conjunction with maxillary sinus floor augmentation: a randomized, controlled clinical trial

• Main Authors: Helle Baungaard Nielsen, Søren Schou, Niels Henrik Bruun, Thomas Starch-Jensen
• Format: Article
• Language: English
• Published: SpringerOpen 2021-07-01
• Series: International Journal of Implant Dentistry
• Subjects: Bone augmentation; Bone substitutes; Dental implants; Dental prosthesis; Randomized; Controlled
• Online Access: https://doi.org/10.1186/s40729-021-00348-5

Abstract Background The purpose of the present study was to test the H0-hypothesis of no difference in the clinical and radiographical treatment outcome of single-crown restorations supported by short implants compared with standard length implants in conjunction with maxillary sinus floor augmentation (MSFA) after 1 year of functional implant loading. Forty patients with partial edentulism in the posterior part of the maxilla were randomly allocated to treatment involving single-crown restorations supported by short implants or standard length implants in conjunction with MSFA. Clinical and radiographical evaluation were used to assess survival of suprastructures and implants, peri-implant marginal bone loss (PIMBL), biological, and mechanical complications. Results Both treatment modalities were characterized by 100% survival of suprastructures and implants after 1 year. Mean PIMBL was 0.60 mm with short implants compared with 0.51 mm with standard length implants after 1 year of functional loading. There were no statistically significant differences in survival of suprastructure and implants, PIMBL, and mechanical complications between the two treatment modalities. However, a higher incidence of biological complications was associated with standard length implants in conjunction with MSFA. Conclusion Within the limitations of the present study, it can be concluded that single-crown restorations supported by short implants seems to be comparable with standard length implants in conjunction with MSFA. However, long-term studies are needed before final conclusions can be provided about the two treatment modalities. Trial registration Clinicaltrials.Gov ID: NCT04518020 . Date of registration: August 14, 2020, retrospectively registered.