Table 3 from Posterior crossbite corrections in the early mixed dentition with quad helix or rapid maxillary expander: a cost-effectiveness analysis of a randomized controlled trial | Semantic Scholar (2024)

Treatment of unilateral posterior crossbite in the mixed dentition is recommended to be performed by a specialist orthodontist using the QH appliance, which had significantly lower costs than QH or EP treatment accomplished in general dentistry as well as EP treatments in specialist Orthodontic clinics.

The results clearly show that in terms of cost-minimization, QH is the preferred method for correcting posterior crossbite in the mixed dentition.

During the initial 4 days of treatment, pain from the tongue and chafe from the appliance caused the most reported inconvenience in the patients in the QH group; a majority of reported visual analogue scale values were in the lower mid-range, suggesting low to moderate pain and discomfort in both groups.

Most of the studies did not meet major methodological requirements; some studies were not relevant because of small sample size, possible bias and unaccounted for confounding variables, lack of blinding in measurements, and deficient statistical methods.

The probability of a second deciduous molar to be successfully used as maxillary expander anchorage for at least 16 months is above 94 per cent; when at baseline, the corresponding premolar cusp is apical to the HPC line.

Both tooth-borne and tooth-bone-borne RME were generally well tolerated by the patients during the first week of treatment and no correlations were found between sex and pain and discomfort, analgesic consumption, and jaw function impairment.

Occlusal grinding in the primary dentition with/without the addition of an upper removable expansion plate was shown to be effective in preventing a posterior crossbite in thePrimary dentition from being perpetuated to the mixed and permanent dentitions.

Quadhelix for SME and conventional banded hyrax for RME were well tolerated by patients after 1 week and the decision to use either appliance could be based on factors not related to patient experiences.

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