Effects of acid etching and calcium chloride immersion on removal torque and bone-cutting ability of orthodontic mini-implants

The 2-fold purpose of this study was to evaluate the effects of acid etching and calcium chloride immersion on removal torque and the bone-cutting ability of orthodontic mini-implants (OMIs). For the removal torque part of the study, 3 types of OMIs (titanium alloy) were evaluated in a rabbit model:...

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Bibliographic Details
Published in:American journal of orthodontics and dentofacial orthopedics 2018-07, Vol.154 (1), p.108-114
Main Authors: Jang, Tae-Ho, Park, Jae-Hyun, Moon, Won, Chae, Jong-Moon, Chang, Na-Young, Kang, Kyung-Hwa
Format: Article
Language:English
Subjects:
Acid Etching, Dental
Animals
Calcium Chloride - pharmacology
Dental Implants
Dentistry
Device Removal
Male
Orthodontic Anchorage Procedures
Rabbits
Surface Properties
Torque
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Summary:The 2-fold purpose of this study was to evaluate the effects of acid etching and calcium chloride immersion on removal torque and the bone-cutting ability of orthodontic mini-implants (OMIs). For the removal torque part of the study, 3 types of OMIs (titanium alloy) were evaluated in a rabbit model: OMIs with acid surface etching with and without calcium chloride immersion (ECG and EG, respectively) and a control group (CG), in which the OMIs had an untreated, machined surface. We inserted 126 OMIs (42 OMIs per type) into both tibias of 21 male rabbits (5 months of age) with body weights of 3.0 to 3.5 kg. Removal torque was evaluated after 1, 4, and 7 weeks. To determine the OMIs’ bone-cutting ability, total insertion time to place an OMI 6 mm into artificial bone was measured (6 OMIs per group). Removal torque values for the EG (3.97 ± 0.52 Ncm) and ECG (4.21 ± 0.44 Ncm) were statistically and significantly higher than those of the CG (3.02 ± 0.53 Ncm) 1 week after implantation (P 
ISSN:0889-5406
1097-6752
DOI:10.1016/j.ajodo.2017.10.032