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Biologic evaluation of a hollow-type miniscrew implant: An experimental study in beagles

Authors
 Jeong-Won Youn  ;  Jung-Yul Cha  ;  Hyung-Seog Yu  ;  Chung-Ju Hwang 
Citation
 AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, Vol.145(5) : 626-637, 2014 
Journal Title
AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS
ISSN
 0889-5406 
Issue Date
2014
MeSH
Animals ; Bone Density/physiology ; Bone Remodeling/physiology ; Bone Screws* ; Connective Tissue/pathology ; Dogs ; Image Processing, Computer-Assisted/methods ; Male ; Mandible/pathology ; Mandible/surgery ; Maxilla/pathology ; Maxilla/surgery ; Miniaturization ; Orthodontic Anchorage Procedures/instrumentation* ; Orthodontic Appliance Design* ; Osseointegration/physiology ; Osteoblasts/pathology ; Osteogenesis/physiology ; Surface Properties ; Time Factors ; Torque ; Vibration
Abstract
INTRODUCTION:
The aims of this study were to assess the biologic stability of a newly designed hollow (H-type) miniscrew compared with conventional (C-type) miniscrews through histomorphometric and histologic analysis.
METHODS:
Both types of miniscrews were placed into the maxillae and the mandibles of 12 beagles. Maximum insertion torque, Periotest (Siemens AG, Bensheim, Germany) value, bone-implant contact, and bone volume were measured.
RESULTS:
The overall success rates of the H-type were 78.3% in the maxilla and 60.0% in the mandible. Mean maximum insertion torque values of the H-type were 14.2 N-cm in the maxilla and 20.9 N-cm in the mandible. The Periotest values of the H-type were -1.5 in the maxilla and -6.4 in the mandible. Mean maximum insertion torque and Periotest values of the H-type were higher than those of the C-type. In the maxilla, the bone-implant contact values of the H-type were 37.3% and 32.3% at 3 and 12 weeks, respectively. In the mandible, the bone-implant contact values were 31.4% and 18.5% at 3 and 12 weeks, respectively.
CONCLUSIONS:
Considering the lower success rate and the insufficient bone-implant contact and bone volume of the H-type in the mandible, the clinician should choose a suitable combination of miniscrews depending on local bone quality and implantation site, such as an H-type in the maxilla and a C-type in the mandible.
Full Text
http://www.sciencedirect.com/science/article/pii/S0889540614000948
DOI
10.1016/j.ajodo.2013.12.028
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Yu, Hyung Seog(유형석) ORCID logo https://orcid.org/0000-0002-1275-5078
Cha, Jung Yul(차정열)
Hwang, Chung Ju(황충주) ORCID logo https://orcid.org/0000-0003-3024-4551
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/98681
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