Full Text:   <2221>

Summary:  <1533>

CLC number: R783.5

On-line Access: 2018-05-05

Received: 2017-06-25

Revision Accepted: 2017-10-18

Crosschecked: 2018-04-09

Cited: 0

Clicked: 4006

Citations:  Bibtex RefMan EndNote GB/T7714


Lu Lu


Hyo-Sang Park


-   Go to

Article info.
Open peer comments

Journal of Zhejiang University SCIENCE B 2018 Vol.19 No.5 P.372-382


Surface characteristics and mechanical behavior of retrieved orthodontic microimplants

Author(s):  Lu Lu, Hyo-Sang Park

Affiliation(s):  Department of Orthodontics, School of Dentistry, Kyungpook National University, Dalgubuldaero 2175, (Samduk 2-Ga), Jung-Gu, Daegu 41940, Korea

Corresponding email(s):   parkhs@knu.ac.kr

Key Words:  Orthodontic microimplant, Surface characteristics, Mechanical behavior, Retrieval analysis

Lu Lu, Hyo-Sang Park. Surface characteristics and mechanical behavior of retrieved orthodontic microimplants[J]. Journal of Zhejiang University Science B, 2018, 19(5): 372-382.

@article{title="Surface characteristics and mechanical behavior of retrieved orthodontic microimplants",
author="Lu Lu, Hyo-Sang Park",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Surface characteristics and mechanical behavior of retrieved orthodontic microimplants
%A Lu Lu
%A Hyo-Sang Park
%J Journal of Zhejiang University SCIENCE B
%V 19
%N 5
%P 372-382
%@ 1673-1581
%D 2018
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1700324

T1 - Surface characteristics and mechanical behavior of retrieved orthodontic microimplants
A1 - Lu Lu
A1 - Hyo-Sang Park
J0 - Journal of Zhejiang University Science B
VL - 19
IS - 5
SP - 372
EP - 382
%@ 1673-1581
Y1 - 2018
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1700324

Objectives: To observe the surface characteristics and mechanical behavior of retrieved microimplants under clinically simulating experimental conditions and to investigate the feasibility of reuse of microimplants. Materials and methods: The microimplants, inserted at different angles, were retrieved from the patients (RMIP) and the artificial bone (RMIA). surface characteristics, including morphologic changes of tips and thread edges, length reduction, and surface compositional variation, were evaluated using a field emission scanning electron microscope, a stereoscopic microscope, and energy-dispersive X-ray spectroscopy, respectively. mechanical behavior comprising maximum insertion torque (MIT) and insertion time was tested with the artificial bone under clinically simulating conditions. Results: The tips and thread edges were worn out to various degrees in retrieved microimplants and thin deposits were observed on the surface in the RMIP group. Traces of foreign elements, such as iron, sulphur, and calcium, were detected on the surface of RMIP. Both MIT and insertion time of retrieved microimplants were increased compared to their initial use, and were much greater in RMIP. The increases of MIT were seen in all groups inserted at the insertion angle of 45° compared with 90°, although the differences were not statistically significant. Conclusions: Retrieved microimplants exhibited different degrees of changes on surface characteristics and mechanical behavior, with more changes in RMIP. The reuse of microimplants for immediate relocation in the same patient may be acceptable; however, postponed relocation and allogeneic reuse of microimplants are not recommended in clinical practice.


方法:将符合纳入条件的临床用后正畸微小种植体回收,另将新正畸种植体以不同角度植入临床模拟条件下的人工骨并取出回收,分别比较了不同来 源正畸微小种植体的表面特征以及力学性能.使 用场发射扫描电镜、立体显微镜以及X射线能谱仪评估了正畸微小种植体尖端及螺纹的形态和长度变化,以及表面元素变化等表面特征;并在临床模拟试验条件下测试了最大植入扭矩和植入时间等力学性能(图1).


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


[1]Alrbata RH, Ha DW, Yu W, et al., 2015. Optimal asymmetric thread for orthodontic microimplants: laboratory and clinical evaluation. Angle Orthod, 85(4):585-590.

[2]ASTM (American Society for Testing and Materials), 2013. ASTM-F543-02: Standard Specification and Test Methods for Metallic Medical Bone Screws. American Society for Testing and Materials, Philadelphia, USA.

[3]Chaddad K, Ferreira AF, Geurs N, et al., 2008. Influence of surface characteristics on survival rates of mini-implants. Angle Orthod, 78(1):107-113.

[4]Chung CJ, Jung KY, Choi YJ, et al., 2014. Biomechanical characteristics and reinsertion guidelines for retrieved orthodontic miniscrews. Angle Orthod, 84(5):878-884.

[5]Dentos, 2014. Orthdontic microimplant (AbsoAnchor®) system. http://dentos.co.kr [Accessed on Mar. 1, 2016].

[6]Eliades T, Zinelis S, Papadopoulos MA, et al., 2009. Characterization of retrieved orthodontic miniscrew implants. Am J Orthod Dentofacial Orthop, 135(1):10.e11-10.e17.

[7]Estelita S, Janson G, Chiqueto K, et al., 2014. Effect of recycling protocol on mechanical strength of used mini-implants. Int J Dent, 2014:424923.

[8]Gross JM, Nascimento GG, Araujo VC, et al., 2016. Mini-implants for orthodontic anchorage surface analysis after redrilling and sterilization—an in vitro study. J Contemp Dent Pract, 17(4):300-305.

[9]Iijima M, Muguruma T, Kawaguchi M, et al., 2015. In vivo degradation of orthodontic miniscrew implants: surface analysis of as-received and retrieved specimens. J Mater Sci Mater Med, 26(2):71.

[10]Lee NK, Baek SH, 2010. Effects of the diameter and shape of orthodontic mini-implants on microdamage to the cortical bone. Am J Orthod Dentofacial Orthop, 138(1):8.e1-8.e8.

[11]Lim SA, Cha JY, Hwang CJ, 2008. Insertion torque of orthodontic miniscrews according to changes in shape, diameter and length. Angle Orthod, 78(2):234-240.

[12]Mattos CT, Oliveira AC, Elias CN, 2010. Is it possible to re-use mini-implants for orthodontic anchorage results of an in vitro study? Mat Res, 13(4):521-525.

[13]Moon CH, Lee DG, Lee HS, et al., 2008. Factors associated with the success rate of orthodontic miniscrews placed in the upper and lower posterior buccal region. Angle Orthod, 78(1):101-106.

[14]Motoyoshi M, Hirabayashi M, Uemura M, et al., 2006. Recommended placement torque when tightening an orthodontic mini-implant. Clin Oral Implants Res, 17(1):109-114.

[15]Motoyoshi M, Matsuoka M, Shimizu N, 2007a. Application of orthodontic mini-implants in adolescents. Int J Oral Maxillofac Surg, 36(8):695-699.

[16]Motoyoshi M, Yoshida T, Ono A, et al., 2007b. Effect of cortical bone thickness and implant placement torque on stability of orthodontic mini-implants. Int J Oral Maxillofac Implants, 22(5):779-784.

[17]Motoyoshi M, Uemura M, Ono A, et al., 2010. Factors affecting the long-term stability of orthodontic mini-implants. Am J Orthod Dentofacial Orthop, 137(5):588.e581-588.e585.

[18]Noorollahian S, Alavi S, Rafiei E, 2015. The effect of multiple processing and re-use on orthodontic mini-screw torque values. Dent Res J (Isfahan), 12(3):243-247.

[19]Park HS, Bae SM, Kyung HM, et al., 2001. Micro-implant anchorgae for treatment of skeletal Class I bialveolar protrusion. J Clin Orthod, 35(7):417-422.

[20]Park HS, Jeong SH, Kwon OW, 2006. Factors affecting the clinical success of screw implants used as orthodontic anchorage. Am J Orthod Dentofacial Orthop, 130(1):18-25.

[21]Park HS, Lee YJ, Jeong SH, et al., 2008. Density of the alveolar and basal bones of the maxilla and the mandible. Am J Orthod Dentofacial Orthop, 133:30-37.

[22]Patil P, Kharbanda OP, Duggal R, et al., 2015. Surface deterioration and elemental composition of retrieved orthodontic miniscrews. Am J Orthod Dentofacial Orthop, 147(4 Suppl):S88-S100.

[23]Song YY, Cha JY, Hwang CJ, 2007. Mechanical characteristics of various orthodontic mini-screws in relation to artificial cortical bone thickness. Angle Orthod, 77(6):979-985.

[24]Togni F, Baras F, Ribas Mde O, et al., 2011. Histomorphometric analysis of bone tissue repair in rabbits after insertion of titanium screws under different torque. Acta Cir Bras, 26(4):261-266.

[25]Ueda M, Matsuki M, Jacobsson M, et al., 1991. The relationship between insertion torque and removal torque analyzed in fresh temporal bone. Int J Oral Maxillofac Implants, 6:442-447.

[26]Vasoglou M, Chrysomali E, Zinelis S, et al., 2014. Retrieval analysis of immediately loaded orthodontic mini-implants: material and tissue characterization. Eur J Orthod, 36(6):683-689.

[27]Wawrzinek C, Sommer T, Fischer-Brandies H, 2008. Microdamage in cortical bone due to the overtightening of orthodontic microscrews. J Orofac Orthop, 69(2):121-134.

[28]Wilmes B, Su YY, Drescher D, 2008. Insertion angle impact on primary stability of orthodontic mini-implants. Angle Orthod, 78(6):1065-1070.

[29]Yadav S, Upadhyay M, Liu S, et al., 2012. Microdamage of the cortical bone during mini-implant insertion with self-drilling and self-tapping techniques: a randomized controlled trial. Am J Orthod Dentofacial Orthop, 141(5):538-546.

Open peer comments: Debate/Discuss/Question/Opinion


Please provide your name, email address and a comment

Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - 2024 Journal of Zhejiang University-SCIENCE