A hand-held manual dental instrument intended to deliver medication (e.g., an antibiotic) directly into a periodontal pocket for the treatment of chronic periodontitis. It is typically a syringe-like device that has a ring-handled plunger, a barrel with finger grips, and a mechanism for holding an insertable cartridge containing the medication. It is usually made of high-grade stainless steel. This is a reusable device.