Meechan J G, McCabe J F, Carrick T E
Department of Oral Surgery, Dental School, University of Newcastle upon Tyne.
Br Dent J. 1990 Jul 21;169(2):54-6. doi: 10.1038/sj.bdj.4807272.
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.
测量了致使玻璃和塑料牙科局部麻醉剂药筒系统失效所需施加在药筒瓶塞上的压力。塑料药筒不会破裂，但在低于玻璃药筒破裂所需的压力下，会因瓶塞周围溶液泄漏而失效。在韧带内注射时可能达到的峰值注射压力下，确定玻璃药筒理论上的失效发生率为1.4%，塑料药筒为75.1%。
