title: Perforations in human teeth with threaded retentive pins: a scanning electron microscopy study.
mesh_terms: D003737:Dental Cavity Preparation; D003739:Dental Cementum / Q000293:injuries / Q000648:ultrastructure; D003743:Dental Enamel / Q000293:injuries / Q000648:ultrastructure; D003772:Dental Pins / Q000009:adverse effects*; D004867:Equipment Design; D006801:Humans; D008855:Microscopy, Electron, Scanning; D014070:Tooth / Q000648:ultrastructure; D018677:Tooth Injuries