Mediject II Intraligamentary Syringe

Mediject (Medidenta)

Advantages of Intraligamental Anesthesia

• Automatic limitation of the power pressure.
• Anesthetizing of a single tooth.
• No numbness of the tongue, lips or cheek.
• Simultaneous treatment of teeth in different quadrants.
• Supports regional block anesthesia.
• Eliminates risk of haematoma.
• Lower emotional impact on patient

Indication for the Intraligamental Anesthesia

• Local anesthesia of a single upper or lower tooth
• Pedodontia – avoids numbness and therefore a possible trauma to lip, tongue or cheek
• Treatment in several quadrants possible – important for instances when extracting a bicuspid on each side for orthodontic reasonsin same setting.
• Treatment of a single tooth – for instance an occlusal obturation, especially at the beginning of a caries in a bicuspid or molar.
• Infected root canals and other endodontic treatments
• Deep curettage and periodontal-surgical interventions

Unique Mediject Operating Features

• Fully autoclavable.
• Removable headpiece and angled threaded nozzle for the injection needle.
• Viewing chamber with safety sleeve for carpule cartridge.
• Handle servo dosing lever with optimal suppoert for index finger for a gradual advance of the dosing plunger resetting key.
• No waiting time between injections and beginning of treatment.
• Excellent depth of anesthesia combined with shorter duration.
• Much less pain than standard injections (infiltration anesthesia in hard palate, intrapulpal or intraseptal injections or for papillectomy).
• A smaller quantity of given anaesthetic (~0.06 ml for single injection / click).
• Needle Suggested: 30G.

Performing Intraligamental Anesthesia with a Mediject

As opposed to a classical infiltration block anesthesia, this method injects the local anesthetic directly into the dental ligament (periodontal ligament) and thus guarantees a rapid, certain and total anesthesia of a single tooth.

• a) the needle point is apically inclined towards the central axis of the tooth.
• b) the needle point in inclined against the tooth (in case of a distal application, the needle might be slightly bent)
• c) the point of the needle is slowly introduced approximately at an angle of 30 degrees and along the tooth and the solution is simultaneously slowly injected.
• d) a penetration of 2mm into the ligament is sufficient, (this corresponds approximately to the height of the alveolar bone crust). If the needle is correctly placed, a definite relatively strong pressure is noticeable. In general 0.15 – 0.20 ml of anesthetic should be injected for each root of the tooth. 

For the Mediject syringe this means:
1 depression of the lever @ 0.06 ml @ 7 sec. duration
3 depressions of the lever @ .18 ml @ 21 sec. duration per root

• e) this pressure must be kept up for the whole duration (min. 21 sec. per root) in order to obtain the penetration of the anesthetic solution through the periodontal ligament up to the apex
• f) in a correct application a definite resistance must be felt, and this must be overcome by a steady and uninterrupted pressure.
• g) the anesthesia of the pulp is fully reached after the completion of the injection and the treatment can be started at once.