| Feature | Polymethyl Methacrylate (PMMA) | Polyethyl Methacrylate (PEMA) | Bisacryl Composite Resin | Light-Cured Composite Resin |
|---|
| Strength / Durability | High strength | Moderate strength; Weaker than PMMA | Brittle | Brittle |
| Exothermic Reaction (Heat) | Highly exothermic | Less exothermic than PMMA; Minimal heat increase (compared to PMMA) | Low exotherm | Controlled setting (light-cured) |
| Polymerization Shrinkage | Significant | Susceptible; Low shrinkage | Minimal | Not specified in notes |
| Aesthetics & Color Stability | Good color stability; Can be characterized | Prone to discoloration; Can be characterized | Can be smoothed and polished; Good for shade matching | Highly aesthetic; Can be characterized |
| Ease of Repair | Easily repaired | Easily repaired | Difficult to repair | Can be used to repair margins of Bisacryl crowns |
| Cost | Low cost | Low cost | High cost | High cost |
| Primary Indications | Laboratory construction (indirect); Long-span provisionals | Direct method for single crowns; Short-span bridges; Relining shells **used to line polycarbonate crowns and metal crowns ** | Direct method for single crowns or short-span bridges; Ideal for matrix/template use | Direct method for single units; Inlays, onlays, and veneers; Repairing Bisacryl margins; **Used to line acetate crowns ** |