Riassunto analitico
Aim of the Study : The aim of this study is to investigate the evidence on the dento-skeletal effects that follow anterior open-bite (AOB) treatment by using temporary anchorage devices (TADs) and their stability over time.
To this end, a systematic review was performed in order to answer the following questions: what are the dento-skeletal effects of anterior open-bite correction by using skeletal anchorage ?
What is the degree of stability of anterior open-bite correction over time ?
Materials and methods : This systematic review was performed in accordance with the PRISMA Statement (Preferred Items for Systematic Reviews and Meta-Analyses).
For the purposes of this study,the following databases were searched : PubMed,Scopus,Web of Science, LILACS, Scielo, Epistemonikos, Embase, Cochrane,Google Scholar,Sciencedirect.
The search strategy for Google Scholar and Sciencedirect was ““open bite” AND “skeletal anchorage””.
For all the other databases the search strategy “open bite AND skeletal anchorage” was adopted.
This study included all articles up to 11/03/2022.
Inclusion criteria in terms of study design for this study were : randomized controlled trials,non-nandomized controlled trials,case series.
Only studies evaluating results by means of cephalometric parameters were included in this review.
Exclusion criteria in terms of study design for this study were : case reports,systematic reviews and meta-analyses.
Studies reporting results without cephalometric records were excluded.
The following data were extracted from the studies : study design,comparison,sample size,age range and mean age,gender distribution,treatment time,method of measurement,devices used,force applied,maxillary or mandibular application of skeletal anchorage,follow up period,reduction of open-bite,effect on mandibular autorotation,effect on facial morphology,outcomes assessed,side effects and author’s conclusion.
Lastly, qualitative analysis was performed using “MINORS” criteria (Methodological Index for Non-Randomizd Studies”) : according to this index each study is ranked on the basis of 12 parameters,each of which can be marked from “0” (lowest mark possible) to “2” (highest mark possible);the highest score achievable for a study being 24.
Studies were classified on the basis of their scores : in “low quality study” with scores ranging from 0 to 10, “average quality study” with scores ranging from 11 to 15,”high quality study” with scores ranging from 16 to 20 and “very high quality study” with scores ranging from 21 to 24.
Four studies included in the systematic review resulted eligible for inclusion in the meta-analysis and were further analyzed to provide quantitative evidence in terms of treatment effects and stability.
Results : After searching the databases,1885 articles were selected, of which 21 were included in this systematic review by applying the inclusion criteria.
The quality of evidence was high for 2 studies, average for 7 studies and low for the other 12 studies.
The meta-analysis showed a mean increase in overbite of 6.13 mm and a mean reduction of N-Me of 3.25mm.
FMA and SN-GoMe respectively reported a 3° and a 2.01° mean reduction.
ANB showed a mean reduction of 1.7° whereas SN-Pog showed a mean increase of 1.97°.
The results of the meta-analysis allow to state that treatment results are stable even after 3 years.
Conclusions : All studies reported an increase in overbite and a counterclockwise rotation of the mandible.
Treatment results appear to be stable even after 3 years with minimal relapse rates.
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Abstract
Aim of the Study : The aim of this study is to investigate the evidence on the dento-skeletal effects that follow anterior open-bite (AOB) treatment by using temporary anchorage devices (TADs) and their stability over time.
To this end, a systematic review was performed in order to answer the following questions: what are the dento-skeletal effects of anterior open-bite correction by using skeletal anchorage ?
What is the degree of stability of anterior open-bite correction over time ?
Materials and methods : This systematic review was performed in accordance with the PRISMA Statement (Preferred Items for Systematic Reviews and Meta-Analyses).
For the purposes of this study,the following databases were searched : PubMed,Scopus,Web of Science, LILACS, Scielo, Epistemonikos, Embase, Cochrane,Google Scholar,Sciencedirect.
The search strategy for Google Scholar and Sciencedirect was ““open bite” AND “skeletal anchorage””.
For all the other databases the search strategy “open bite AND skeletal anchorage” was adopted.
This study included all articles up to 11/03/2022.
Inclusion criteria in terms of study design for this study were : randomized controlled trials,non-nandomized controlled trials,case series.
Only studies evaluating results by means of cephalometric parameters were included in this review.
Exclusion criteria in terms of study design for this study were : case reports,systematic reviews and meta-analyses.
Studies reporting results without cephalometric records were excluded.
The following data were extracted from the studies : study design,comparison,sample size,age range and mean age,gender distribution,treatment time,method of measurement,devices used,force applied,maxillary or mandibular application of skeletal anchorage,follow up period,reduction of open-bite,effect on mandibular autorotation,effect on facial morphology,outcomes assessed,side effects and author’s conclusion.
Lastly, qualitative analysis was performed using “MINORS” criteria (Methodological Index for Non-Randomizd Studies”) : according to this index each study is ranked on the basis of 12 parameters,each of which can be marked from “0” (lowest mark possible) to “2” (highest mark possible);the highest score achievable for a study being 24.
Studies were classified on the basis of their scores : in “low quality study” with scores ranging from 0 to 10, “average quality study” with scores ranging from 11 to 15,”high quality study” with scores ranging from 16 to 20 and “very high quality study” with scores ranging from 21 to 24.
Four studies included in the systematic review resulted eligible for inclusion in the meta-analysis and were further analyzed to provide quantitative evidence in terms of treatment effects and stability.
Results : After searching the databases,1885 articles were selected, of which 21 were included in this systematic review by applying the inclusion criteria.
The quality of evidence was high for 2 studies, average for 7 studies and low for the other 12 studies.
The meta-analysis showed a mean increase in overbite of 6.13 mm and a mean reduction of N-Me of 3.25mm.
FMA and SN-GoMe respectively reported a 3° and a 2.01° mean reduction.
ANB showed a mean reduction of 1.7° whereas SN-Pog showed a mean increase of 1.97°.
The results of the meta-analysis allow to state that treatment results are stable even after 3 years.
Conclusions : All studies reported an increase in overbite and a counterclockwise rotation of the mandible.
Treatment results appear to be stable even after 3 years with minimal relapse rates.
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