The document summarizes research on the impact of removable and fixed orthodontic retainers. Researchers reviewed 24 studies on factors like cost-effectiveness, failure rates, and periodontal health. For mandibular stainless steel fixed retainers fused from canine to canine, the mean failure risk was 0.29, while those fused to canines only showed a 0.25 risk. Another study found that while both removable and fixed lower lingual retainers can cause relapse in lower front tooth alignment after treatment, the extent of relapse was not significantly different between the two types. More high-quality research is still needed to fully understand the advantages of different orthodontic retainers.
2. The typical approval for indefinite retention makes it essential to figure out the impact of removable
and fixed orthodontic retainers on various factors. Such factors include cost-effectiveness, failure and
survival rates of retainers and periodontal health. The study conducted by Dalya Al-Moghrabi aimed to
determine the effect of these retainers on the results patients described.
A Methodical Analysis
The researchers commenced a thorough literature search reliant on a distinct gray and electronic
literature search strategy. They examined several catalogs, including the ProQuest Dissertation Thesis
database, LILACS and the Cochrane Central Register of Controlled Trials. They even searched through
the National Research Register, MEDLINE via OVID, BBO, PubMed, andClinicalTrials.gov.
They ended up identifying 24 studies, six potential cohort studies, and 18 randomized control trials,
but only considered 16 of these as high-quality. Due to dissimilarities in result methods and significant
clinical heterogeneity, the meta-analysis was unrealistic. For mandibular stainless steel fixed retainers
that were fused from canine to canine, the mean failure risk was 0.29. Meanwhile, those fused to
canines only showed 0.25 mean failure risk.
3. A meta-regression revealed that the time passed from placement do not directly associate to the
failure of fixed stainless steel mandibular retainers.
The Differences between Fixed and Removable
Another study wanted to determine if bonded multistrand, lower lingual, canine to canine retainers
could stop the setback of lower labial segment alignment after fixed appliance therapy. Nikki Atack
and her team wanted to match this to the lower Hawley-type removable retainers. They grouped 29
patients into two and discovered that relapse could happen in the lower labial segment for both
removable and fixed retainers. The extent of relapse observed with these two kinds of retainer is not
considerably dissimilar, statistically.
Thus, there is still a need for more well-designed potential studies to explain the advantages
connected to orthodontic retainers.
