The effect of microrough surface treatment on miniscrews used as orthodontic anchors

Chang, Chin Shan; Lee, Tzer Min; Chang, Chih Han; Liu, Jia Kuang

doi:10.1111/j.1600-0501.2009.01728.x

Cited by 32 publications

(28 citation statements)

References 35 publications

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“…This result was similar to that of previous studies 2526. The BV associated with unused screws was significantly higher than that associated with recycled screws, whereas there were no significant differences in BIC.…”

Section: Discussionsupporting

confidence: 91%

Effects of recycling on the biomechanical characteristics of retrieved orthodontic miniscrews

et al. 2017

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ObjectiveThe aim of this study was to compare recycled and unused orthodontic miniscrews to determine the feasibility of reuse. The comparisons included both miniscrews with machined surfaces (MS), and those with etched surfaces (ES).MethodsRetrieved MS and ES were further divided into three subgroups according to the assigned recycling procedure: group A, air-water spray; group B, mechanical cleaning; and group C, mechanical and chemical cleaning. Unused screws were used as controls. Scanning electron microscopy, energy-dispersive X-ray spectrometry, insertion time and maximum insertion torque measurements in artificial bone, and biological responses in the form of periotest values (PTV), bone–implant contact ratio (BIC), and bone volume ratio (BV) were assessed.ResultsMorphological changes after recycling mainly occurred at the screw tip, and the cortical bone penetration success rate of recycled screws was lower than that of unused screws. Retrieved ES needed more thorough cleaning than retrieved MS to produce a surface composition similar to that of unused screws. There were no significant differences in PTV or BIC between recycled and unused screws, while the BV of the former was significantly lower than that of the latter (p < 0.05).ConclusionsThese results indicate that reuse of recycled orthodontic miniscrews may not be feasible from the biomechanical aspect.

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Section: Discussionsupporting

confidence: 91%

Effects of recycling on the biomechanical characteristics of retrieved orthodontic miniscrews

et al. 2017

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“…26 Surface modification by sandblasting and acid etching has a beneficial effect on implant biocompatibility. 12,[27][28][29] In the present study, even with the surface visibly smooth both to the naked eye and at 503 magnification ( Figure 4), osteoblast proliferation occurred within the irregularities observed by SEM, favoring cell 12,13,18 No significant difference was observed in terms of osteoblast proliferation onto the Neodent and Morelli mini-implants; however, only for the latter was the proliferation different from that on the control, polystyrene. This result may be related to the surface similarity between the Neodent mini-implant and polystyrene (used as the control in cell-culture studies) regarding surface energy.…”

Section: Discussioncontrasting

confidence: 64%

In vitro study of human osteoblast proliferation and morphology on orthodontic mini-implants

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2015

The Angle Orthodontist

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“…Accordingly, alkali hydrothermally treated titanium implants are expected to induce excellent bone integration. In fact, several in vivo studies have reported on the benefits of alkali treatment of implant surfaces [28][29][30], and its strong effect on the chemical integration of implants with host bone. For these reasons, compared with the control group, the BIC of the alkali-treated implant showed higher values in the whole portion and the cortical bone portion.…”

Section: Discussionmentioning

confidence: 99%

Histological and Bone Morphometric Evaluation of Osseointegration Aspects by Alkali Hydrothermally-Treated Implants

et al. 2018

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Abstract:The purpose of this study was to investigate the osseointegration aspects of alkali-treated implants by histological and bone morphometric evaluations. Titanium implants (control) and alkali hydrothermally-treated titanium implants were used. Samples were evaluated by surface structure observation and wettability tests. Both implants were placed into the femurs of five rabbits, and osseointegration was assessed by measurement of removal torque (RT), bone-implant contact ratio (BIC), and bone tissue area ratio (BTA). Measurements were performed at the whole portion around the implant, the cortical bone portion, and the bone marrow portion. The surface structure of alkali-group showed nanoscale pores and super hydrophilicity. RT, BIC, and BTA values of alkali-group were significantly higher than those of control-group at the whole portion. In the cortical bone portion, the BIC value was higher in the alkali-group than in the control-group, and BTA showed no significant difference between groups. In the bone marrow portion, even though no significant difference between control and alkali groups, the latter had higher ratio of BIC than the former. These results indicate that alkali treated implants enhance bone integration in areas where the implant is in contact with bone, and may promote osteoinduction in the non-bone marrow portion.

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The effect of microrough surface treatment on miniscrews used as orthodontic anchors

Abstract: There were no differences between the loaded and unloaded conditions in most groups. The RTV and BIC increased with time. In the loaded condition, the RTV of the SLA surface increased earlier, at 4 weeks, while the SL/NAOH group showed the highest RTV after 8 weeks.

Cited by 32 publications

References 35 publications

Effects of recycling on the biomechanical characteristics of retrieved orthodontic miniscrews

Effects of recycling on the biomechanical characteristics of retrieved orthodontic miniscrews

In vitro study of human osteoblast proliferation and morphology on orthodontic mini-implants

Histological and Bone Morphometric Evaluation of Osseointegration Aspects by Alkali Hydrothermally-Treated Implants

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