Soft tissue changes following extraction vs. nonextraction orthodontic fixed appliance treatment: a systematic review and meta-analysis

European Journal of Oral Sciences
Dimitrios KonstantonisTheodore Eliades

Abstract

The aim of this systematic review was to assess the effect of systematic extraction protocols during orthodontic fixed appliance treatment on the soft tissue profile of human patients. Nine databases were searched until December 2016 for controlled clinical studies including premolar extraction or nonextraction treatment. After elimination of duplicate studies, data extraction, and risk-of-bias assessment according to the Cochrane guidelines, random-effects meta-analyses of mean differences (MD) or standardized mean differences (SMD) and their 95% CIs were performed, followed by subgroup, meta-regression, and sensitivity analyses. Extraction treatment was associated with increased lower lip retraction (24 studies; 1,456 patients; MD = 1.96 mm), upper lip retraction (21 studies; 1,149 patients; MD = 1.26 mm), nasolabial angle (21 studies; 1,089 patients; MD = 4.21°), soft-tissue profile convexity (six studies; 408 patients; MD = 1.24°), and profile pleasantness (three studies; 249 patients; SMD = 0.41). Patient age, extraction protocol, and amount of upper incisor retraction during treatment were significantly associated with the observed extraction effects, while the quality of evidence was very low in all cases due to risk of ...Continue Reading

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Citations

May 6, 2019·Journal of Orthodontics·Danielle HodgkinsonMauro Farella
Mar 7, 2021·Journal of Clinical Medicine·Georgios KanavakisPertti Pirttiniemi
May 20, 2021·Journal of the World Federation of Orthodontists·Spyridon N PapageorgiouTheodore Eliades
Aug 18, 2021·European Journal of Orthodontics·Danielle HodgkinsonMauro Farella
Aug 28, 2021·Journal of Pharmacy & Bioallied Sciences·Sagar MapareAshutosh Tadawalkar
Jun 4, 2021·Orthodontics & Craniofacial Research·Roberto RongoMarie A Cornelis

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