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Clinical and radiographic outcome following immediate loading and delayed loading of single-tooth implants: Randomized clinical trial

Journal article
Authors B. Gjelvold
J. Kisch
B. R. Chrcanovic
Tomas Albrektsson
A. Wennerberg
Published in Clinical Implant Dentistry and Related Research
Volume 19
Issue 3
Pages 549-558
ISSN 1523-0899
Publication year 2017
Published at Institute of Clinical Sciences, Department of Biomaterials
Pages 549-558
Language en
Keywords immediate function, immediate loading, implant, implant-supported crown, implant survival, patient satisfaction, randomized controlled trial, soft-tissue response, anterior maxilla, aesthetic zone, dental implants, crowns, metaanalysis, stability, 1-year, pink, Dentistry, Oral Surgery & Medicine
Subject categories Dentistry


BackgroundImmediate loading of single implants is generally considered a reliable procedure. PurposeThe objective of the present prospective randomized clinical study was to compare the overall treatment outcome following immediate loading (IL) and delayed loading (DL) of single implants after 1 year of follow-up. Materials and MethodsPatients with a missing maxillary tooth (15-25) were randomly assigned to IL or DL. The protocol included implant installation in healed sites, immediate loading, delayed loading, temporary screw-retained restoration, and replacement with a permanent single implant crown. Outcome measures were implant survival, marginal bone level, soft tissue changes, papillae index, pink, and white esthetic score (PES and WES), patient judged aesthetics, and oral health impact profile (OHiP-14). ResultsImplant survival rate was 100% and 96% for IL and DL, respectively. Implant success rate was 96% and 88% for IL and DL, respectively. Statistically significant lower papilla index scores were found in the IL group at temporary crown and definitive crown placement. An overall statistically significant improvement after 12 months for PES, WES and OHIP-14 was found. ConclusionThis prospective randomized study showed that single implants in the maxilla can present satisfactory results with respect to either immediate loading or delayed loading after 12 months.

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