Abstract:
BACKGROUND:Both continuous and intermittent loadings are commonly applied in orthodontics. Clinical experiences and some studies believed that longer duration of force produce more effect (tooth movement, suture expansion, bone remodeling) than transient forces applied with the same magnitude. Alternatively, others indicated that interruption or recovery periods of various periods between loadings cause more bone remodeling and less root resorption. Therefore, which force is more favorable for osseointegration and stability of orthodontic mini-implant remains to be elucidated. PURPOSE:To evaluate the influence of continuous or intermittent loading on stability of titanium mini-implants. MATERIALS AND METHODS:One hundred ninety-two mini-implants were implanted bilaterally in intraradicular zones of mandibular M1 and P2 in 48 beagles. Loadings were delivered consecutively in continuous group, pauses were given for the last 3 or 7 days of each 2-week reactivation period for intermittent group A and B, respectively. The group unloaded was set as control. After 2, 4, 6 and 8 weeks, the animals were sacrificed and microscopic computerized tomography (μCT), histomorphological observation and pull-out test were applied. RESULTS:The μCT parameters of mini-implants in four groups were gradually increased with loading time prolonged, while the value of peak load at extraction (F(max)) increased and reached summit at week 6, but dropped slightly at week 8. In continuous group, all measurements were lower than those in intermittent groups at all time points (p < .05), and all values in intermittent group B were higher than those in intermittent group A. Histomorphology observation revealed different degrees of bone remodeling with new bone formation in the peri-implants region in different groups. CONCLUSIONS:Intermittent loading regimen is more favorable for obtaining stability than continuous force.
journal_name
Clin Implant Dent Relat Resjournal_title
Clinical implant dentistry and related researchauthors
Wu Y,Xu Z,Tan L,Tan L,Zhao Z,Yang P,Li Y,Tang T,Zhao Ldoi
10.1111/cid.12090subject
Has Abstractpub_date
2015-02-01 00:00:00pages
163-72issue
1eissn
1523-0899issn
1708-8208journal_volume
17pub_type
杂志文章abstract:BACKGROUND:Discrimination between ongoing and solved research questions may help to distinguish established dogmas from evidence-based implant dentistry. PURPOSE:The purpose of this study was to investigate topics of interest in the field of oral implant science and evolving thematic trends in clinical studies during ...
journal_title:Clinical implant dentistry and related research
pub_type: 杂志文章,评审
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journal_title:Clinical implant dentistry and related research
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journal_title:Clinical implant dentistry and related research
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journal_title:Clinical implant dentistry and related research
pub_type: 杂志文章
doi:10.1111/j.1708-8208.2007.00060.x
更新日期:2008-03-01 00:00:00
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journal_title:Clinical implant dentistry and related research
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journal_title:Clinical implant dentistry and related research
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journal_title:Clinical implant dentistry and related research
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journal_title:Clinical implant dentistry and related research
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journal_title:Clinical implant dentistry and related research
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Clinical implant dentistry and related research
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journal_title:Clinical implant dentistry and related research
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journal_title:Clinical implant dentistry and related research
pub_type: 杂志文章
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更新日期:2016-04-01 00:00:00
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journal_title:Clinical implant dentistry and related research
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更新日期:2014-12-01 00:00:00
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journal_title:Clinical implant dentistry and related research
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journal_title:Clinical implant dentistry and related research
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journal_title:Clinical implant dentistry and related research
pub_type: 临床试验,杂志文章,多中心研究
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journal_title:Clinical implant dentistry and related research
pub_type: 杂志文章,随机对照试验
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更新日期:2019-04-01 00:00:00
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journal_title:Clinical implant dentistry and related research
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更新日期:1999-01-01 00:00:00
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journal_title:Clinical implant dentistry and related research
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
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更新日期:2003-01-01 00:00:00
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journal_title:Clinical implant dentistry and related research
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