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Immediate loading of fixed partial prostheses reconstructed using either tapered or straight implants in the posterior area: A randomized clinical trial

Authors
 Yoo-Yeon Kim  ;  Young Woo Song  ;  Myong Ji Kim  ;  Jae-Kook Cha  ;  Ji-Man Park  ;  Jee-Hwan Kim  ;  Ui-Won Jung 
Citation
 CLINICAL IMPLANT DENTISTRY AND RELATED RESEARCH, Vol.23(5) : 703-715, 2021-10 
Journal Title
CLINICAL IMPLANT DENTISTRY AND RELATED RESEARCH
ISSN
 1523-0899 
Issue Date
2021-10
MeSH
Dental Implantation, Endosseous ; Dental Implants* ; Dental Prosthesis, Implant-Supported ; Dental Restoration Failure ; Follow-Up Studies ; Humans ; Immediate Dental Implant Loading* ; Mouth, Edentulous* / surgery ; Torque ; Treatment Outcome
Keywords
dental implant ; immediate loading ; implant survival rate ; peri-implant marginal bone loss ; randomized clinical trial
Abstract
Background: In immediately loaded implants within 72 h after the implant placement in the unilaterally and partially edentulous ridge, primary stability is considered critical, which can be influenced by the design of the implant fixture.

Purpose: To determine the outcomes at 1 year after the immediate loading of multiunit fixed partial prostheses over either tapered implants (TIs) or straight implants (SIs) in the posterior region.

Materials and methods: Forty-eight patients (24 patients, 52 implants in TI group; 24 patients, 50 implants in SI group) were included for the study. Except for the one SI group patient whose two implants showed the insertion torque less than 30 Ncm, provisional prostheses designed and fabricated from intraoral scan data obtained immediately after implant surgery were delivered to rest of the 47 subjects at 3-7 days. After a year, the survival rate was estimated by intention-to-treat (ITT) and per-protocol (PP) analyses, and marginal bone loss (MBL) and implant stability were also analyzed statistically (p < 0.05).

Results: Survival rate at implant level in TI group was 96.2%, and that of SI group in the ITT analysis was 86.0%. Intergroup difference, however, was not statistically significant (p > 0.05). Insertion torque was significantly higher in TI group than SI group (47.12 ± 6.37 Ncm vs. 41.60 ± 9.77 Ncm; p < 0.05). MBLs of both groups were less than 0.1 mm at 1-year follow-up and was similar between two groups (p > 0.05).

Conclusions: Immediate loading of fixed partial prostheses after TI and SI placement showed reliable outcomes in the partially edentulous posterior ridge. In terms of the initial mechanical stability, the performance was superior for TIs than for SIs.
Full Text
https://onlinelibrary.wiley.com/doi/10.1111/cid.13039
DOI
10.1111/cid.13039
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, Jee Hwan(김지환) ORCID logo https://orcid.org/0000-0002-0872-4906
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
Jung, Ui Won(정의원) ORCID logo https://orcid.org/0000-0001-6371-4172
Cha, Jae Kook(차재국) ORCID logo https://orcid.org/0000-0001-6817-9834
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/187308
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