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Updated: May 25, 2026
In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
Published on: March 7, 2014
[A study on the stability of miniscrew on different loading time as orthodontic anchorage]
Liang-yan Zhu1, Yong-qing Yan, Yi-ming Gao
1Department of Stomatology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China. zliangyan@gmail.com
Purpose:
To evaluate the stability of the miniscrew on different loading time as orthodontic anchorage.
Methods:
2 healthy adult male Beagle dogs were used in this study. 48 mini-implants were implanted into the maxilla and mandible of the dogs. The miniscrews were divided into 8 different groups,1 group was loaded 0g as control group and the others were loaded 200g forces as experimental groups. 200g forces were loaded on the corresponding mini-implant anchorages immediately after implantation and at the time of 1w,2w,3w,4w,5w and 6w after implantation. The dogs were sacrificed at 12w after implantation. Histological progresses of implant-bone interfaces was examined with light microscope. Blue deposition and contact ratio were calculated and analyzed using SPSS13.0 software package.
Results:
Fibrous and osseous-integration was noted in the interface, there was no significant difference in bone deposition ratio and bone contact ratio.
Conclusion:
Different force loading time does not affect the stability of the mini-implant anchorage.
