title: Plastic dental local anaesthetic cartridges: a laboratory investigation.
abstract: The pressures applied to the bungs of glass and plastic dental local anaesthetic cartridges which were necessary to cause failure of the system were measured. Plastic cartridges did not fracture, but they failed due to leakage of solution around the bung at pressures less than those needed to break glass cartridges. At the peak injection pressures which may be obtained during intraligamentary injections, it was established that the theoretical incidence of failure was 1.4% for glass and 75.1% for plastic cartridges.
authors.affiliation: Department of Oral Surgery, Dental School, University of Newcastle upon Tyne.
authors.forename: J G
authors.initials: JG
authors.lastname: Meechan
authors.forename: J F
authors.initials: JF
authors.lastname: McCabe
authors.forename: T E
authors.initials: TE
authors.lastname: Carrick
mesh_terms: D000766:Anesthesia, Dental / Q000295:instrumentation*; D000772:Anesthesia, Local / Q000295:instrumentation*; D004868:Equipment Failure; D005898:Glass; D008422:Materials Testing; D010969:Plastics; D011312:Pressure; D011336:Probability; D013314:Stress, Mechanical; D013594:Syringes
chemical_list: D010969:Plastics