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Immediate loading protocols increase the risk of failure of implants placed by fully guided surgery in partially edentulous jaws: A randomized clinical trial

Authors
 Kyung-A Ko  ;  Young Woo Song  ;  Ji-Man Park  ;  Young-Bum Park  ;  Chang-Sung Kim  ;  Jung-Seok Lee 
Citation
 CLINICAL IMPLANT DENTISTRY AND RELATED RESEARCH, Vol.23(5) : 735-744, 2021-10 
Journal Title
CLINICAL IMPLANT DENTISTRY AND RELATED RESEARCH
ISSN
 1523-0899 
Issue Date
2021-10
MeSH
Alveolar Bone Loss* / etiology ; Dental Implantation, Endosseous ; Dental Implants* ; Dental Prosthesis, Implant-Supported ; Dental Restoration Failure ; Humans ; Immediate Dental Implant Loading* ; Jaw, Edentulous* / surgery ; Treatment Outcome
Keywords
fully guided implant surgery ; implant survival rate ; loading of dental implant ; marginal bone level ; randomized clinical trial
Abstract
Aim: To compare the 1-year outcomes of immediate loading (IL) and delayed loading (DL) protocols for implants placed by fully guided surgery in partially edentulous jaws.

Materials and methods: This study included 72 patients who received implant surgery with either IL (93 implants, 36 patients) or DL (94 implants, 26 patients). A prefabricated provisional prosthesis was delivered immediately for the IL group (86 implants, 32 patients) with the exception of 4 subjects in whom an initial torque of >20 Ncm and an implant stability quotient of >65 were not achieved, while all DL-group implants were loaded after 3 months. The 1-year implant survival rate estimated by intention-to-treat (ITT) and per-protocol (PP) analyses, and the marginal bone loss (MBL) estimated by cone-beam computed tomography were statistically evaluated (p < 0.05).

Results: The survival rate in the DL group was 100% at both patient and implant levels. With only 26 subjects with 78 implants surviving in the IL group, the survival rates were 69.4% and 83.4% at the patient and implant levels, respectively, in the ITT analysis, and 78.1% and 90.2% in the PP analysis. All intergroup differences in survival rates were statistically significant (p < 0.01). MBL was less than 0.1 mm in both groups (p > 0.05).

Conclusions: IL for implants placed by fully guided surgery in the partially edentulous jaws increased the probability of failure compared to 3-month DL. Regardless of when loading occurred, marginal bone levels remained stable.
Full Text
https://onlinelibrary.wiley.com/doi/10.1111/cid.13042
DOI
10.1111/cid.13042
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Periodontics (치주과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Prosthodontics (보철과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Chang Sung(김창성) ORCID logo https://orcid.org/0000-0003-3902-1071
Park, Young Bum(박영범)
Park, Ji-Man(박지만) ORCID logo https://orcid.org/0000-0003-0018-1166
Song, Young Woo(송영우) ORCID logo https://orcid.org/0000-0003-1835-5646
Lee, Jung Seok(이중석) ORCID logo https://orcid.org/0000-0003-1276-5978
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/187231
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