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Secondary stability achieved in dental implants with a calcium-coated sandblasted, large-grit, acid-etched (SLA) surface and a chemically modified SLA surface placed without mechanical engagement: A preclinical study

Authors
 Young Woo Song  ;  Kyoung-Won Paeng  ;  Myong Ji Kim  ;  Jae-Kook Cha  ;  Ui-Won Jung  ;  Ronald E Jung  ;  Daniel S Thoma 
Citation
 CLINICAL ORAL IMPLANTS RESEARCH, Vol.32(12) : 1474-1483, 2021-12 
Journal Title
CLINICAL ORAL IMPLANTS RESEARCH
ISSN
 0905-7161 
Issue Date
2021-12
MeSH
Animals ; Calcium ; Dental Implantation, Endosseous ; Dental Implants* ; Dental Prosthesis Design ; Dogs ; Mandible / surgery ; Osseointegration ; Surface Properties ; Titanium
Keywords
acid-etched dental implant ; animal study ; calcium-coated dental implant ; chemically modified sandblasted ; histology ; large-grit ; osseointegration
Abstract
Objectives: To assess the osseointegration of calcium-coated (CS) and chemically modified, sandblasted, large-grit, acid-etched (MS) dental implants with a lack of primary mechanical stability.

Materials and methods: Eighteen implants in CS and MS groups each were loosely placed in the mandible of six mongrel dogs and allowed to heal for 2, 4 and 8 weeks. Implant stability quotient (ISQ) and implant stability test (IST) values recorded periodically and bone-to-implant contact (BIC) and the number of Haversian canals per 1 mm2 measured histologically were statistically analysed (p < .05).

Results: All CS and MS implants placed survived. Compared with immediately after installation, ISQ and IST values in both groups increased significantly to over 76 at 2 weeks (p < .0083) and remained stable thereafter. BIC was significantly greater at 8 weeks (61.3 ± 13.6% in CS group; 57.6 ± 5.9% in MS group) compared to 2 and 4 weeks in both groups (p < .017). There were no significant intergroup differences in ISQ, IST or BIC at different time points. Significantly more Haversian canals were observed in group CS (6.2 ± 1.0/mm2 ) compared with group MS at 4 weeks (3.7 ± 1.8 /mm2 ; p < .05), while intergroup difference was not significant at 8 weeks.

Conclusion: Both CS and MS implants inserted without primary stability obtained osseointegration within 2 weeks, and lamellar bone adjacent to the implants was first observed at 8 weeks. The formation of primary osteons was more active at 4 weeks in group CS than in group MS.
Full Text
https://onlinelibrary.wiley.com/doi/10.1111/clr.13848
DOI
10.1111/clr.13848
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Periodontics (치주과학교실) > 1. Journal Papers
Yonsei Authors
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/22282913/187638
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