Crown and Bridge
Crown and Bridge CATEGORY DESCRIPTION
Temporary crown and bridge materials have undergone significant change and innovation since their introduction in the 1930s. The oldest materials still in use—acrylic (PMMA and PEMA) temporaries for single and multiple long-span provisionals—come in numerous shades and are easily smoothed and polished, with PMMA offering increased strength and color stability. The evolution of materials to bis-acryls (bis-GMA and UDMA), multi-functional methacrylate esters filled with glass and/or silica particles, has resulted in easier handling, improved compressive and tensile strength, and less shrinkage.
Among the multitude of advances in provisional materials are light-cured composite resin preformed crowns for single-unit provisionals in molar, premolar, and canine shapes. These moldable crowns enable adaptation of a fit around preparations on the buccal, lingual, and occlusal aspects prior to light setting, optimizing fit, wear, strength and polishability without the need for a matrix.
In the digitization and CAD/CAM arena are precision-milled, acrylate, polymer-filled, contoured single- and multiple-unit provisionals. While not fabricated chairside, these materials offer increased strength and fit, along with a customizable solution. One system of compatible materials for temporary restorations does integrate dentist with technician, with users able to combine a chairside self-curing provisional material with acrylate polymer blocks and lab materials.
Temporary crown and bridge materials have undergone significant change and innovation since their introduction in the 1930s. The oldest materials still in use—acrylic (PMMA and PEMA) temporaries for single and multiple long-span provisionals—come in numerous shades and are easily smoothed and polished, with PMMA offering increased strength and color stability. The evolution of materials to bis-acryls (bis-GMA and UDMA), multi-functional methacrylate esters filled with glass and/or silica particles, has resulted in easier handling, improved compressive and tensile strength, and less shrinkage.
Among the multitude of advances in provisional materials are light-cured composite resin preformed crowns for single-unit provisionals in molar, premolar, and canine shapes. These moldable crowns enable adaptation of a fit around preparations on the buccal, lingual, and occlusal aspects prior to light setting, optimizing fit, wear, strength and polishability without the need for a matrix.
In the digitization and CAD/CAM arena are precision-milled, acrylate, polymer-filled, contoured single- and multiple-unit provisionals. While not fabricated chairside, these materials offer increased strength and fit, along with a customizable solution. One system of compatible materials for temporary restorations does integrate dentist with technician, with users able to combine a chairside self-curing provisional material with acrylate polymer blocks and lab materials.
