Short implants (6 mm) vs. vertical bone augmentation and standard-length implants (≥9 mm) in atrophic posterior mandibles: a 5-year retrospective study. Issue 12 (December 2017)

• Record Type: Journal Article
• Authors: Pieri, F.; Forlivesi, C.; Caselli, E.; Corinaldesi, G.
• Is Part Of: International journal of oral & maxillofacial surgery. Volume 46:Issue 12(2017:Dec.)
• Page Start: 1607
• Page End: 1614
• Publication Date: 2017-12
• Subjects: atrophic mandible -- vertical augmentation -- bone graft -- short dental implants; Mouth -- Surgery -- Periodicals; Maxilla -- Surgery -- Periodicals; Dentistry -- Periodicals; Dentistry, Operative; Oral Surgical Procedures; Surgery, Oral; Dentistry; Maxilla -- Surgery; Mouth -- Surgery; Electronic journals; Periodicals; 617.52059
• DOI: 10.1016/j.ijom.2017.07.005
• Languages: English
• ISSNs: 0901-5027

Abstract

Abstract: This retrospective study compared the 5-year clinical and radiographic outcomes of short implants (6 mm) (short group), and standard-length implants (≥9 mm) placed after a vertical augmentation with autologous bone blocks (augmentation group), supporting partial fixed prostheses in the posterior mandible. Forty-five partially edentulous patients were enrolled in the study and evaluated after 5 years: 22 (51 implants) in the augmentation group and 23 (46 implants) in the short group. Eight surgical complications occurred in the augmentation group versus none in the short group ( P = 0.003). One short implant failed before loading and one standard-length implant failed after 4 years because of peri-implantitis ( P = 1.0). Eight biological and two prosthetic complications occurred in the augmentation group vs. three biological and three prosthetic complications in the short group ( P = 0.09 and P = 1.0, respectively). A mean marginal bone loss of 1.61 ± 1.12 mm in the augmentation group and 0.68 ± 0.68 mm in the short group was found ( P = 0.002). Within the limitations of this study, both techniques resulted in successful clinical results after 5 years, but short implants exhibited less surgical complications and marginal bone loss than standard-length implants placed in augmented bone.