Miniscrew implant applications in contemporary orthodontics

Chang, Hong-Po; Tseng, Yu-Chuan

doi:10.1016/j.kjms.2013.11.002

Cited by 56 publications

(61 citation statements)

References 35 publications

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“…Therefore, it is often preferred by orthodontists and patients and has been widely used over the past decade. However, the mini-implant cannot always offer sufficient stability, and the clinical success rate for use of mini-implants has been reported to be approximately 80% 1,2) , with most cases of failure occurring in the posterior region of the mandible 3,4) . Studies also have shown that implant loss occurs most often within 1-2 months after implantation 5,6) , and Moon et al 5) proposed that failure is largely related to characteristics of implantation, including the location.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional finite element analysis of the stability of mini-implants close to the roots of adjacent teeth upon application of bite force

et al. 2018

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To investigate the cause of mandibular implant loss, we evaluated the stress distribution in the bone under bite force when the miniimplant was near the root using three-dimensional finite element analysis. Our analysis involved four finite element models with different distances between the implant and adjacent tooth root and three loading conditions. With loading of the tooth only or both the tooth and implant, the peak stress within the bone around the implant neck, displacement, and stress surrounding the bone near the root increased as the distance between the implant and root decreased. However, with separate loading of the implant, the stress did not correlate with the distance between the implant and root. Application of bite force increases stress within bones surrounding mini-implants near the roots of adjacent teeth and may threaten implant stability, but simple orthodontic loading has little effect on the stress distribution at the mini-implant-bone interface.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional finite element analysis of the stability of mini-implants close to the roots of adjacent teeth upon application of bite force

et al. 2018

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“…Conventional implantation sites for micro-screws are generally selected between two roots [18] . For the anterior region, micro-screws are generally used to solve problems such as mandibular protrusion and deep lamination.…”

Section: Discussionmentioning

confidence: 99%

Optimal implantation site of orthodontic micro-screws in the mandibular anterior region based on CBCT

Wang

Shi

et al. 2019

Preprint

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Background To determine the optimal implantation site of orthodontic micro-screws based on cone beam computed tomography (CBCT) analysis in the mandibular anterior tooth region, provide a theoretical basis for orthodontic implant placement and improve post-implantation stability. Methods Forty patients who underwent CBCT scanning were selected for this study. CBCT scanning was applied to measure the interradicular distance, buccolingual dimension, labial cortical bone thickness and lingual cortical bone thickness between mandibular anterior teeth at planes 2 mm, 4 mm, 6 mm and 8 mm below the alveolar ridge crest. The data were measured and collected to obtain a comprehensive evaluation of the specific site conditions of the alveolar bone. Results The interradicular distance, buccolingual dimension and labial cortical bone thickness between the mandibular anterior teeth were positively correlated with the distance below the alveolar ridge crest (below 8 mm). The interradicular distance, buccolingual dimension, labial cortical bone thickness and lingual cortical bone thickness were all greater than those in other areas between the lateral incisor root and canine incisor root 4 mm, 6 mm, and 8 mm below the alveolar ridge crest. Conclusion The area between the lateral incisor root and the canine incisor root in planes 4 mm, 6 mm, and 8 mm from the alveolar ridge crest can be used as safe sites for implantation, while 8 mm below the alveolar ridge crest can be the optimal implantation site. An optimal implantation site can be 8 mm below the alveolar ridge crest between the lateral incisor root and the canine incisor root.

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“…It was composed of 0.40 mg/L of NaCl, 0.40 mg/L of KCl, 0.80 mg/L of CaCl 2 .H 2 O, 1.0 mg/L of CO(NH 2 ) 2 in distilled water with a pH adjusted and controlled with a 10-N NaOH solution. The performance of any material placed into the oral environment should be assessed with artificial saliva of a known composition, since natural saliva varies widely 22 …”

Section: Methodsmentioning

confidence: 99%

Evaluation of cytotoxicity and corrosion resistance of orthodontic mini-implants

Alves

Segurado

Dorta

et al. 2016

Dental Press J. Orthod.

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Objective: To evaluate and compare in vitro cytotoxicity and corrosion resistance of mini-implants from three different commercial brands used for orthodontic anchorage. Methods: Six mini-implants (Conexão(tm), Neodent(tm) and SIN(tm)) were separately immersed in artificial saliva (pH 6.76) for 30 and 60 days. The cytotoxicity of the corrosion extracts was assessed in L929 cell cultures using the violet crystal and MTT assays, as well as cell morphology under light microscopy. Metal surface characteristics before and after immersion in artificial saliva were assessed by means of scanning electron microscopy (SEM). The samples underwent atomic absorption spectrophotometry to determine the concentrations of aluminum and vanadium ions, constituent elements of the alloy that present potential toxicity. For statistical analysis, one-way ANOVA/Bonferroni tests were used for comparisons among groups with p < 0.05 considered significant. Statistical analysis was carried out with Graph Pad PRISM software Version 4.0. Results: No changes in cell viability or morphology were observed. Mini-implants SEM images revealed smooth surfaces with no obvious traces of corrosion. The extracts assessed by means of atomic absorption spectrophotometry presented concentrations of aluminum and vanadium ions below 1.0 µg/mL and 0.5 µg/mL, respectively. Conclusion: Orthodontic mini-implants manufactured by Conexão(tm), Neodent(tm) and SIN(tm) present high corrosion resistance and are not cytotoxic.

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Miniscrew implant applications in contemporary orthodontics

Cited by 56 publications

References 35 publications

Three-dimensional finite element analysis of the stability of mini-implants close to the roots of adjacent teeth upon application of bite force

Three-dimensional finite element analysis of the stability of mini-implants close to the roots of adjacent teeth upon application of bite force

Optimal implantation site of orthodontic micro-screws in the mandibular anterior region based on CBCT

Evaluation of cytotoxicity and corrosion resistance of orthodontic mini-implants

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