Obturators are prostheses that are used to rehabilitate maxillary defects. The lateral wall height of the obturator is an important aspect that affords the prosthesis with retention and stability. To overcome the difficulty faced with the use of readymade denture flasks in accommodating this height during processing, a simple flask extension technique using self-cure acrylic resin is described here. This procedure is reversible, does not require any special equipment, and can be used routinely in dental laboratories.
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