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Metals 2017, 7(4), 112; doi:10.3390/met7040112

The Effect of Anchor Volume on the Mechanical Strengths of Orthodontic Micro-Implants

1
School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
2
Department of Orthodontics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
3
Faculty of Oral Hygiene, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
4
Department of Oral and Maxillofacial Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 20 January 2017 / Revised: 10 March 2017 / Accepted: 23 March 2017 / Published: 25 March 2017
View Full-Text   |   Download PDF [2795 KB, uploaded 25 March 2017]   |  

Abstract

Anchor volume (AV) might be an important factor affecting mechanical strengths of micro-implant. To investigate the correlation between AV and three mechanical strengths (IT: insertion torque; RF: resonance frequency; HPS: horizontal pullout strength), 55 micro-implants (diameter 1.5 mm: Type A, B, C; diameter 1.3 mm: Type D and E) were driven into the artificial bones at a 7-mm depth. The RF, IT, HPS and AV were measured. One-way analysis of variance (ANOVA) with Tukey Honestly Significant Difference (HSD) post comparison and Pearson’s correlation were used to detect significant differences. Null hypothesis states that there was no statistically significant correlation between AV and these three forces (IT, RF, and HPS). Type A and Type D had the lowest IT (4.2 Ncm). Type C had the highest RF (9.9 KHz) in the stability test, and Type B had the greatest HPS (190.9 Ncm) in the resistance test. There was significant correlation between the IT and HPS. AV was significantly correlated with RF, IT, and HPS. The null hypothesis was rejected. In this study, each of these brands had its distinct advantages in the RF, IT, and HPS. Moreover, inner diameter/outer diameter ratio and AV affect the magnitude of HPS. View Full-Text
Keywords: anchor volume; resonance frequency analysis; insertion torque; horizontal pullout strength; micro-implant anchor volume; resonance frequency analysis; insertion torque; horizontal pullout strength; micro-implant
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tseng, Y.-C.; Wu, J.-H.; Ting, C.-C.; Wang, H.-C.; Chen, H.-S.; Chen, C.-M. The Effect of Anchor Volume on the Mechanical Strengths of Orthodontic Micro-Implants. Metals 2017, 7, 112.

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