[Dentin pins: risk evaluation and precautions].

When large restorations are necessary, self screw-cutting dentinal pits are very useful auxiliaries. The main risks encountered during their utilization are: --perforation through periodontium--pulpal wound--dentinal cracks--weakness of mechanical properties of restorative material--corrosion--breakdown of the drill--pulpal warning up--unesthetical front restorations. The way to prevent those difficulties are: --precise clinical and radiological examinations--insertion point--direction--number--composition--choice of pits.