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Bone and soft tissue outcomes, risk factors, and complications of implant-supported prostheses: 5-Years RCT with different abutment types and loading protocols

Artikel i vetenskaplig tidskrift
Författare Catharina Göthberg
K. Grondahl
Omar Omar
Peter Thomsen
Christer Slotte
Publicerad i Clinical Implant Dentistry and Related Research
Volym 20
Nummer/häfte 3
Sidor 313-321
ISSN 1523-0899
Publiceringsår 2018
Publicerad vid Institutionen för kliniska vetenskaper, Avdelningen för biomaterialvetenskap
Sidor 313-321
Språk en
Länkar https://doi.org/10.1111/cid.12587
Ämnesord clinical outcomes, complications, dental abutment, dental implant, marginal bone loss, risk factors, peri-implantitis, dental implants, fixed prostheses, follow-up, survival, diseases, prevalence, frequency, metaanalysis, rates, Dentistry, Oral Surgery & Medicine
Ämneskategorier Biomaterialvetenskap

Sammanfattning

BackgroundData on risk factors and complications after long-term implant treatment is limited. The aims were to evaluate the role of various fixation modes and to analyze complications and risks that affect long-term use of implant-supported partial fixed dental prostheses. Materials and MethodsFifty partially edentulous subjects received three Branemark TiUnite implants. Superstructures were attached directly at implant level (IL) or via abutments: machined surface (AM) and an oxidized surface (AOX, TiUnite). Implants were immediately loaded (test) or unloaded for 3 months (control). Examinations occurred over a 5-year period. ResultsForty-four subjects were re-examined after 5 years. Cumulative survival rates in test and control groups were 93.9% and 97.0%, respectively. Marginal bone loss (MBL; Mean [SEM]) was significantly lower at superstructures connected to AM (1.61 [0.25] mm) than at sites with no abutment IL (2.14 [0.17] mm). Peri-implantitis occurred in 9.1% of subjects and in 4.0% of implants. Multiple linear regression indicated that increased probing pocket depth (PPD), periodontal disease experience, deteriorating health, and light smoking (10 cigarettes/day) predict greater MBL, whereas increased buccal soft tissue thickness and higher ISQ predict lower MBL. ConclusionsThe results show that MBL was influenced by the connection type. A machined abutment, instead of connecting the superstructure directly at the implant level, was beneficial. The following factors influenced MBL: PPD, periodontal disease experience, deteriorating health, light smoking, buccal soft tissue thickness, and ISQ. The results on peri-implantitis underscore the need for long-term maintenance care. Further, the abutment material surface properties constitute additional target for strategies to minimize MBL.

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