Root proximity and inclination of orthodontic mini-implants after placement: Cone-beam computed tomography evaluation

Shinohara, Akihiko; Motoyoshi, Mitsuru; Uchida, Yasuki; Shimizu, Nobutaka

doi:10.1016/j.ajodo.2013.02.021

Cited by 43 publications

(28 citation statements)

References 17 publications

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“…The present study corroborates other investigations (3,4,7,12) which found no statistically significant differences in failure rates between OMSs placed in the upper vs. lower jaw (p=0.4775), or in the palatal mucosa (5,7,8,13) compared to other sites (p=0.1081). In agreement with other studies (2,4,5,8,12,13,17,20), the results of this study showed that OMS length has no bearing on rate of failure (p=0.9113) and also, no difference was found indicating failure when the mandibular plane angle (4,9,11,16) was used to classify the three facial patterns (p=0.7522), which disagrees with studies that used other references and found differences between patients with different vertical characteristics (4,9,11,16).…”

Section: Discussionsupporting

confidence: 82%

“…This side also exhibited greater failure rates in other studies, with (22) or without (1,4,15,16) statistically significant evidence to account for differences in the success rate. This result may be related to factors such as preferred side of mastication, access difficulties when placing the OMS or viewing the right or left side (7,10,22), different levels of oral hygiene among righties and lefties (23,24), and random statistical errors (5). Studies differ when trying to show that right-handed (24) or left-handed (25) patients keep better hygiene, or attempting to prove that manual dexterity is not linked to plaque control (23), but motivation is.…”

Section: Discussionmentioning

confidence: 99%

“…Recent studies show success rates for single minicrews ranging from 57% (17) to 93.43% (7). Failure is defined as loss of primary (18)(19)(20)(21) or secondary (19) stability during treatment.…”

Section: Discussionmentioning

confidence: 99%

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Analysis of Factors Associated with Orthodontic Microscrew Failure

Dobranszki

Faber

Scatolino³

et al. 2014

Braz. Dent. J.

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The objective of this study was to examine whether factors such as insertion site, patient's facial pattern, microscrew features, type of tooth movement desired, level of experience handling orthodontic microscrews and operator expertise were associated with failure of microscrews. After the approval of an ethics committee, 166 patients of one practice signed an informed consent and received 293 microscrews randomly distributed by 3 operators with different levels of practical experience and expertise in handling microscrews. The microscrews were observed in a period of 365 days or as long as orthodontic forces had to be applied and independent variables were recorded. Analysis by the chi-square test did not produce enough evidence as to allow the assertion that there was an association between the variable "failure" and the variables "maxilla" (p=0.4775), "face" (p=0.1081), "facial pattern" (p=0.7522), "microscrew length" (p=0.9113), "desired movement" (p=0.0584), and "operator" (p=0.5785). The variable "insertion side" was significantly associated with "failure" (p=0.0022). In a 365-day survival analysis, the Log Rank test yielded a p-value of 0.00178 for the curve of variable "insertion side," and showed no significant differences for other variables. With a total success rate of 87.38%, the only variable found to be significant was "insertion side" (p=0.0022), with 3.088 more likelihood of a microscrew failing if placed on the left side than on the right side. The procedure of inserting microscrews involved a rapid learning curve for an inexperienced operator, which justifies their placement by orthodontists.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

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Analysis of Factors Associated with Orthodontic Microscrew Failure

Dobranszki

Faber

Scatolino³

et al. 2014

Braz. Dent. J.

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show abstract

“…De acordo com Kuroda et al (2007), Asscherickx et al (2008) e Shinohara et al (2013), o contato radicular parece ser um dos principais fatores de risco que levam à falha de um mini-implante, além das sequelas deixadas. Quando a extensão do contato entre a raiz dentária e o mini-implante é pequena, as lesões ocasionadas não parecem ser permanentes, uma vez que se observa reparação do cemento e ligamento periodontal (ALVES et al, 2013), tanto em animais (ASSCHERICKX et al, 2005;BRISCENO et al, 2009;DAO et al, 2009;HEMBREE et al, 2009;KIM, 2011;RENJEN et al, 2009), como em humanos (AHMED et al, 2012;KADIOGLU et al, 2008;MAINO et al, 2007).…”

Section: Lista De Ilustraçõesunclassified

“…A avaliação do contato/perfuração radicular por mini-implantes geralmente tem sido feita através de análise histológica (AHMED et al, 2012;ASSCHERICKX et al, 2005;BRISCENO et al, 2009;SHIN;KYUNG, 2008;DAO et al, 2009;KIM, 2011;LEE et al, 2010;MAINO et al, 2007;RENJEN et al, 2009) TASDEMIR, 2011;HWANG, 2011;KURODA et al, 2007;MCCABE;KAVANAGH, 2012), muitas vezes limitadas por ser tratar de imagens bidimensionais (ASSCHERICKX et al, 2008), e por tomografia computadorizada de feixe cônico (KURODA et al, 2007;SHIGEEDA, 2014;SHINOHARA et al, 2013;SON et al, 2014;WATANABE et al, 2013) (BARROS et al, 2011;FLORVAAG et al, 2010;HWANG, 2008;WILMES et al, 2008a;DRESCHER, 2008). Quando a colocação dos mini-implantes é realizada sem perfuração prévia, exige-se mais força de torção para inserção SHIN;KYUNG, 2008;MASSIF;FRAPIER;MICALLEF, 2007;MISCHKOWSKI et al, 2008 Ainda na tabela 4, observa-se que não houve uma relação direta entre o aumento do diâmetro dos mini-implantes com o aumento do torque de inserção, relação esta tão frequente na literatura (BARROS et al, 2011;FLORVAAG et al, 2010;HWANG, 2008;WILMES et al, 2008a;…”

Section: Microtomografia Computadorizadaunclassified