Abstract
The treatment of infants with trisomy 21 (TS21) with a myostimulation plate can improve
their development and quality of life. The manufacture of these plates requires an
accurate cast of the maxilla, and their efficacy relies on their stability and retention.
As such, the quality of the impression is a determining factor. The lack of commercially
available stock trays for infants with TS21 creates difficulties, including inadequate
impression quality and the risk of inhaling impression material. The present technique
simplifies impression making for infants with TS21 from 3 months of age to when their
maxillary deciduous teeth erupt by using computer-aided design and computer-aided
manufacturing (CAD-CAM) impression trays. Sixty-five stored gypsum maxillary casts
from infants with TS21 that had been used to manufacture myostimulation plates were
analyzed to select four differently sized representative casts for designing the impression
trays. A CAD software program was used to digitally shape four sizes of the impression
tray from the selected gypsum casts. Practitioners interested in this approach can
download and export the standard tessellation language (STL) files using a quick response
(QR) code. The impression trays should be manufactured with the stereolithography
additive technique using biocompatible resin. This technique allows practitioners
to make accurate maxilla impressions for infants with TS21 by manufacturing their
own impression trays using the free-access STL files rather than the cumbersome conventional
method.
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Article info
Publication history
Published online: May 26, 2023
Publication stage
In Press Corrected ProofFootnotes
Funding: This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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© 2023 by the Editorial Council for The Journal of Prosthetic Dentistry.
