intra-ligmaentary- causes deeper anaesthesia
common syringe used is ligmaject, administered periodontal ligament around tooth, high force to be given, cartridge inclosed in plastic sheath incase it shatters
intra-osseous- given through alveolar bone
burs go through bone, needles placed i hole to administer la
intrapulpal- given into pulp of tooth, only used if other methods been unsuccessful
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