How do geometry-related parameters influence the clinical performance of orthodontic mini-implants? A systematic review and meta-analysis

Cunha, Amanda Carneiro da; Veiga, Ana Maria Antonelli da; Ferreira, Daniele Masterson Tavares Pereira; Mattos, Cláudia Trindade; Nojima, Lincoln Issamu; Nojima, Matilde da Cunha Gonçalves; Maia, Lucianne Cople

doi:10.1016/j.ijom.2017.06.010

Cited by 24 publications

(21 citation statements)

References 84 publications

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“…It seems that mini-implant stability is subject to change up to 4 weeks after the insertion and remains constant for the rest of the treatment. These findings are supported by previous evidence, which indicated main remodelling at the bone to mini-implant interface 2 to 4 weeks after the MI insertion [24][25][26].…”

Section: Discussionsupporting

confidence: 91%

RFA measurements of survival midpalatal orthodontic mini-implants in comparison to initial healing period

2020

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Background: In dental implantology, the development of stability over time is a well-investigated topic. In case of orthodontic mini-implants, quantitative data for long-term stability is not available yet. This study aims to clinically investigate the long-term stability of mini-implants inserted in the midsagittal suture of the anterior palate. Moreover, the influence of the length of implants was elucidated. The stability of 2 × 9 and 2 × 11 mm miniimplants after orthodontic treatment (9 mm, 2.84 years ± 1.25 years; 11 mm, 3.17 years ± 0.96 years) was assessed by resonance frequency analysis (RFA). The obtained long-term pieces of data were compared with each other (9 mm vs 11 mm), as well as with the data from the matched early stability groups, to assess the initial and early secondary stability after the insertion from previous clinical trials. Results: For both lengths, the long-term stability (2 × 9 mm, 25.12 ± 7.11, n = 21; 2 × 11 mm, 24.39 ± 5.82, n = 18) was significantly lower than primary stability (2 × 9 mm, 36.14 ± 6.08, n = 19; 2 × 11 mm, 33.35 ± 3.53, n = 20). The differences within the groups disappeared over the initial healing period: after 4 weeks for the 2 × 9 mm implants and after 2 weeks for the 2 × 11 mm implants. Also, the 2 × 9 mm and 2 × 11 mm implants showed comparable long-term stability values. Conclusion: The stability of midpalatal mini-implants does not change in the long term after the initial healing period. Moreover, 2 × 9 mm mini-implants seem to be appropriate for orthodontic anchorage, as the stability of 2 × 11 mm implants is not higher. Therefore, owing to lower invasiveness, 2 × 9 mm implants should be preferred.

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Section: Discussionsupporting

confidence: 91%

RFA measurements of survival midpalatal orthodontic mini-implants in comparison to initial healing period

2020

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“…Several factors described in the literature could affect the success or failure of the MS. Two recent systematic reviews [9,10] demonstrated that the implant geometry parameters, properties of the insertion site, the type of gingivae and smoking habit could influence the clinical performance of MS. From our included studies, two of them assessed different MS lengths [14,15] and only one compared different diameters [14]. Despite MS length data being reported as a variable, it was not addressed as an outcome in Wiechmann et al [16] study, and success rates favored 6-7 mm MS over 5 mm in the Suzuki et al [15] study.…”

Section: Discussionmentioning

confidence: 99%

“…In the event of identification of the same study in different articles, the article with longer follow-up time was included. In additional, a hand search was made in two published systematic reviews in this topic [9,10].…”

Section: Study Selection Criteriamentioning

confidence: 99%

Failure of miniscrews installed in maxilla and mandible: a systematic review and meta-analysis

Santos

Poletto-Neto

Queiroz

et al. 2020

BDS

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Objective: The aim of this systematic review was to compare the clinical failure rate of orthodontic miniscrews in maxilla and mandible. Material and Methods: Randomized controlled trials of patients in orthodontic treatment, which required miniscrews for orthodontic intervention reporting the failure rate of miniscrews in the maxilla and mandible were searched in Pubmed database. Two authors independently reviewed all identified titles and abstracts for eligibility. Comparison between failures in maxilla and mandible were estimated using pairwise meta-analysis to calculate the relative risk (RR) of failure and the 95% confidence intervals using a random-effect model. The reports of randomized trials were assessed for bias using the Cochrane risk of bias tool. Results: Four studies fulfilled the eligibility criteria. 299 patients with a total of 628 miniscrews installed were included in the analysis. The analysis showed a 0.55 RR (95% CI 0.23–1.29) and I2 = 85%. All studies had an unclear risk of bias regarding to the two following items: allocation concealment, blinding of participants and personnel. All studies had a low risk of bias with regard to incomplete outcome data and selective reporting. The results did not demonstrate statistical difference between risk of failure of miniscrew between maxilla and mandible. Conclusion: The results of the meta-analysis showed that miniscrews installed in maxilla presents reduced risk of failure. A tendency of higher number of failures in mandible was also demonstrated. However, results should be interpreted with caution because of the very low quality of included studies and the differences among methodologies. KeywordsMeta-analysis; Orthodontic anchorage procedures; Review.

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“…15,25,29,32 These findings are also consistent with higher success rates reported for longer and larger mini-implants. 16…”

Section: Discussionmentioning

confidence: 99%

Investigation of the optimal design of orthodontic mini-implants based on the primary stability: A finite element analysis

Haghighi

Pouyafar

Navid

et al. 2019

J Dent Res Dent Clin Dent Prospects

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Background. The design of an orthodontic mini-implant is a significant factor in determining its primary stability and its clinical success. The aim of this study was to measure the relative effect of mini-implant design factors on primary stability of orthodontic mini-implants. Methods. Thirty-two 3-dimensional assemblies of mini-implant models with their surrounding bone were generated using finite element analysis software. The maximum displacement of each mini-implant model was measured as they were loaded with a 2-N horizontal force. Employing Taguchi’s design of experiments as a statistical method, the contribution of each design factor to primary stability was calculated. As a result of the great effect of the upper diameter and length, to better detect the impact of the remaining design factors, another set of 25 models with a fixed amount of length and diameter was generated and evaluated. Results. The diameter and length showed a great impact on the primary stability in the first set of experiments (P<0.05). According to the second set of experiments, increased taper angle in the threaded and non-threaded area decreased the primary stability. There was also an optimum amount of 2.5 mm for threaded taper length beyond which the primary stability decreased. Conclusion. It is advisable to increase the diameter and length if primary stability is at risk. In the second place, a minimum amount of taper angle, both in the threaded and non-threaded area with an approximate proportion of 20% of threaded taper length to MI length, would be desirable for MIs with a moderate size.

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How do geometry-related parameters influence the clinical performance of orthodontic mini-implants? A systematic review and meta-analysis

Cited by 24 publications

References 84 publications

RFA measurements of survival midpalatal orthodontic mini-implants in comparison to initial healing period

RFA measurements of survival midpalatal orthodontic mini-implants in comparison to initial healing period

Failure of miniscrews installed in maxilla and mandible: a systematic review and meta-analysis

Investigation of the optimal design of orthodontic mini-implants based on the primary stability: A finite element analysis

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