The normal range of functional forces is approximately
150–200 MPa, which is within the tolerable limits of coldpolymerized
PMMA. Being a provisional restoration that is
used for a short period of time, the limitations of the coldpolymerized
PMMA material are tolerable. Bis-acrylic materials shrink less, liberate less energy, and
result in a better marginal fit, compared to PMMA materials.