Double taper post system

While many fiber posts simply mimic the shapes of popular metal posts, Biolight DUAL is designed to fully benefit from fiber technology. The larger coronal tapers dramatically improve adaptation throughout the length of the canal. The overall shape offers a superior adaptation to the canal, minimizes the removal of dentin, and keeps the resin cement layer (the weakest link) to an absolute minimum.
Single taper post system

The coronal portion of Biolight ST is parallel, while the apical portion is a taper design. This permits the clinician to choose a larger coronal diameter for increased strength, while the conservative taper portion minimizes the amount of dentin reduction.