Comparison of in vivo and in vitro force decay of elastomeric chains/modules: a systematic review and meta analysis.
J World Fed Orthod
; 10(4): 155-162, 2021 12.
Article
in En
| MEDLINE
| ID: mdl-34364839
ABSTRACT
BACKGROUND:
The study evaluated and compared the force decay of orthodontic elastomeric chains/modules in both in vivo and in vitro settings.METHODS:
A protocol in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines was formulated and registered with the International Prospective Register of Systematic Reviews. A total of 53 articles (44 in vitro and 9 in vivo studies) found via search of the electronic databases of Cochrane and the National Library of Medicine (MEDLINE; PubMed), and manual search of the gray literature from institutional library resources, were selected. Data extraction, quality analysis, risk of bias assessment, and meta-analysis of the level of force decay of elastomeric chains/modules were conducted per standard protocol, and suitable statistical analyses were applied.RESULTS:
The mean force decay in the in vivo setting was 41.9% at 24 hours, 42.6% after 1 week, 46.8% after 2 weeks, and 55.0% after 3 weeks. Similarly, the force decay in the in vitro studies was 38.9% at 24 hours, 42.1% after 1 week, 44.6% after 2 weeks, and 51.1% after 3 weeks. However, at the 95% confidence interval, the force decay rates of in vivo and in vitro studies overlap, with a statistically insignificant difference in force decay observed in the in vivo and in vitro settings.CONCLUSIONS:
This systematic review and meta-analysis observed more force decay in the in vivo studies versus the in vitro studies (although this difference was statistically insignificant), with the maximum force decay occurring during the initial days, with a reduction to approximately 50% within 3 weeks. Hence, change of the elastomeric chains/module, at intervals of 3 weeks, is advised. (PROSPERO registration no. CRD42020209535).Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Orthodontic Appliances
/
Elastomers
Type of study:
Systematic_reviews
Country/Region as subject:
America do norte
Language:
En
Journal:
J World Fed Orthod
Year:
2021
Document type:
Article
Affiliation country:
India