| 摘要 |
A system of treating teeth or associated tooth structure uses an abrasive-laden fluid. Fluid (101) at different selected pressures (103) is delivered to a device (105) for mixing the fluid with abrasive. The air/abrasive mix flows through a hand-held device (107) to the point of treatment. A selective control (107, 191) delivers air or air and abrasive as desired. Upon termination of an air/abrasive treatment, air is diverted through a purge line (214) to purge the system downstream from the abrasive device. A vacuum (221) removes abrasive and debris from the patient's mouth during and after the abrasive treatment. A hand-held nozzle device (107) has finger controlled fluid ports (194-197). A disposable collection chamber (232) for sterile disposal of the abrasive and debris has a common filter (233) for the purge circuit and the system for removal of abrasive and debris from the mouth. The existing dental office suction system or venturi may provide suction for the vacuum. Pressure regulating and relief valves insure instantaneous change from one pressure to another. |
