Biomechanical effect of abutment on stability of orthodontic mini‐implant

Motoyoshi, Mitsuru; Yano, Shoichiro; Tsuruoka, Takashi; Shimizu, Nobutaka

doi:10.1111/j.1600-0501.2005.01130.x

Cited by 80 publications

(58 citation statements)

References 11 publications

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“…There are many investigators reporting that it should be between 100 and 200g 29 and that it would not be successful if it was > 200g. 3,[30][31][32][33][34] For this reason, the quantity of force was determined to be 150g.…”

Section: Discussionmentioning

confidence: 99%

Histomorphometric Evaluation of the Effects of Various Diode Lasers and Force Levels on Orthodontic Mini Screw Stability

Göymen

İşman

Taner

et al. 2015

Photomedicine and Laser Surgery

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Objective: The purpose of this study was to evaluate the effects of different laser dose and force levels on the stability of orthodontic mini screws used for anchorage, by histomorphometric analyses. Background data: Low-level laser therapy speeds up blood flow, improves the mechanism of the revitalization processes, reduces the risk of infection, boosts metabolic activities, and accelerates the healing of the damaged tissue. Although there are many research studies about low-level laser therapy applications in a variety of areas, no investigations were found concerning mini screw stability using various laser dose levels with different force level applications. Methods: Seventeen New Zealand white rabbits were used. A total of 68 cylindrical, self-drilling orthodontic mini screws were threaded at the fibula. Experimental subjects were divided into six groups; force application was not performed in the first three groups, whereas 150g of force was applied via nickel-titanium closed-coil springs placed between two mini screws in the other three groups. Measurements of the initial torque values (10 Ncm) were manipulated by a digital portable torque gauge. Various low-level laser doses were applied to the groups during the postoperative 10 days. After 4 weeks, bone-to-implant contact and cortical bone thickness were histomorphometrically analyzed. Results: In the 150g force plus 20 J/cm 2 dosage group, the highest bone-to-implant contact values were observed. ( p < 0.05) There were no statistically significant correlations between cortical bone thickness and bone-to-implant contact values; on the other hand, no significant difference was found among the same groups in terms of cortical bone thickness values ( p > 0.05). Conclusions: Low-level laser therapy was noticed to induce the mini screw-bone contact area. Low-level laser therapy may be a supplementary treatment method to increase the stability of the orthodontic mini screw.

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Section: Discussionmentioning

confidence: 99%

Histomorphometric Evaluation of the Effects of Various Diode Lasers and Force Levels on Orthodontic Mini Screw Stability

Göymen

İşman

Taner

et al. 2015

Photomedicine and Laser Surgery

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show abstract

“…They recommended that initial torque values of 5-10 Ncm be used for adequate primary stability for an orthodontic mini-implant, and noted that poor initial stability after surgical insertion and subsequent lower secondary stability and osseointegration were responsible for the failure of mini-implants. 33 Wilmes et al…”

Section: Discussionmentioning

confidence: 99%

Can Initial Torque Value Predict the Success of Orthodontic Mini-Screws?

Topcuoglu¹,

Bıçakçı²,

Isman³

2013

Turkish Journal of Orthodontics

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Objective: To investigate the correlation between initial torque and removal torque of orthodontic mini-screws. Materials and Method: Sixty-four orthodontic mini-screws (measuring 1.5 3 4.4 mm, 1.6 3 4.7 mm, 1.7 3 5.5 mm, and 1.8 3 5.6 mm) were used. All mini-screws were inserted into the fibulas of 8 male rabbits. The initial torque values were immediately recorded using a digital torque gauge. For 2 months, 115 g force was applied to mini-screws inserted into the right fibula of the rabbits. The same procedure was followed for inserting the mini-screws into the left fibula of the rabbits but without applying any force. After 2 months, the removal torque values were recorded for all mini-screws. All statistical analyses were performed using SPSS version 14.0 for Windows. Spearman's correlation coefficient was used to analyze the relationships between initial and removal torque values. Results: Intragroup comparison of all brands of mini-screws showed similar features. There were no statistically significant differences between the initial torque values of all mini-screws (p . 0.05). The Spearman correlation coefficient showed that correlations between the initial and removal torque values were insignificant (p.0.05). Conclusion:The results of this study suggest that the initial torque value is not a reliable method for predicting the success of a mini-screw. (Turkish J Orthod 2013;26:143-148)

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“…Comparing these results to other orthodontic studies using FEA is challenging due to several differences between models. Many of the studies available in the literature do not model human anatomy ( Gracco et al, 2009;Motoyoshi et al, 2005) and are not 3-dimensional (Brettin et al, 2008), or require additional resolution (Jones et al, 2001). Cattaneo et al (2009) produced a similar high-quality model of two teeth and surrounding bone for evaluation of orthodontic tooth movement and resulting periodontal stresses.…”

Section: Discussionmentioning

confidence: 99%