Cannula and process

摘要: An improved cannula for utilization with and attachment to a dental instrument capable of selectively alternatively injecting liquid under pressure providing vacuum aspirating purposes process utilizing the cannula. The has through central bore opening into first end body second that is either open said or closed. Opposed slots openings are provided in adjacent provide communication between exterior bore, also means attaching an such as described above on thereof. A modified form invention fully closed single elongate radiused "window" closely end.