LOCAL ANAESTHETIC NERVE INNERVATION

What cranial nerve provides sensation to the teeth?

Trigeminal nerve (CN V)

What are the 3 divisions of the trigeminal nerve?

Ophthalmic (V1)

Maxillary (V2)

Mandibular (V3)

Which division supplies the maxilla?

Maxillary nerve

Which division supplies the mandible?

Mandibular nerve

Which nerve supplies the maxillary incisors and canine?

Anterior superior alveolar (ASA) nerve

Which nerve usually supplies the maxillary premolars?

Middle superior alveolar (MSA) nerve

Which nerve supplies the maxillary molars?

Posterior superior alveolar (PSA) nerve

Which nerve supplies the mesiobuccal root of the maxillary first molar?

Often the middle superior alveolar (MSA) nerve

Which nerve supplies the posterior hard palate?

Greater palatine nerve

Which nerve supplies the anterior hard palate?

Nasopalatine nerve

Which nerve supplies the mandibular teeth?

Inferior alveolar nerve (IAN)

Where does the inferior alveolar nerve enter the mandible?

Through the mandibular foramen.

What injection is commonly used to anaesthetise mandibular teeth?

Inferior alveolar nerve block (IANB)

Which nerve supplies the lower lip and chin?

Mental nerve

The mental nerve is a branch of which nerve?

Inferior alveolar nerve

Which nerve supplies the mandibular anterior teeth?

Incisive nerve

Which nerve supplies the buccal gingiva around mandibular molars?

Long buccal nerve

Does an inferior alveolar nerve block usually anaesthetise the long buccal nerve?

No, the long buccal nerve may require a separate injection

Which nerve supplies general sensation to the anterior two-thirds of the tongue?

Lingual nerve

Which nerve supplies the lingual gingiva?

Lingual nerve

Which nerve is usually affected during an inferior alveolar nerve block and causes tongue numbness?

Lingual nerve

What does the ASA nerve supply?

Maxillary incisors and canine.

What does the MSA nerve supply?

Maxillary premolars and sometimes the mesiobuccal root of the first molar

What does the PSA nerve supply?

Maxillary molars

What does the greater palatine nerve supply?

Posterior hard palate and palatal gingiva

What does the nasopalatine nerve supply?

Anterior hard palate and palatal gingiva behind the incisors

What does the inferior alveolar nerve supply?

Mandibular teeth

What does the mental nerve supply?

Lower lip, chin and buccal soft tissue in the premolar/anterior region

What does the lingual nerve supply?

Anterior two-thirds of the tongue, floor of mouth and lingual gingiva

What does the long buccal nerve supply?

Buccal mucosa and buccal gingiva around mandibular molars

What does the mental nerve NOT normally anaesthetise?

The pulps of the teeth

Which nerve is associated with the lower lip and chin?

Mental nerve

Which nerve is associated with the tongue?

Lingual nerve

Which nerve is associated with the buccal gingiva of mandibular molars?

Long buccal nerve

Which nerve is associated with the mandibular teeth?

Inferior alveolar nerve

Which division of the trigeminal nerve supplies the maxillary teeth?

Maxillary nerve

Which division of the trigeminal nerve supplies the mandibular teeth?

Mandibular nerve

What are the main landmarks for an inferior alveolar nerve block (IANB)?

Coronoid notch, pterygomandibular raphe and mandibular occlusal plane

What is the coronoid notch?

A notch on the front border of the mandibular ramus

What is the pterygomandibular raphe?

A fold of tissue behind the molars

What is the main bony landmark for an IANB?

Mandibular foramen

What landmark is used for a long buccal nerve injection?

Buccal mucosa near the most posterior mandibular molar

What is the main landmark for a mental nerve block?

Mental foramen

Where is the mental foramen usually found?

Near the mandibular premolars

What is the main landmark for an incisive nerve block?

Mental foramen.

What is the main landmark for a greater palatine nerve block?

Greater palatine foramen

Where is the greater palatine foramen usually found?

Near the maxillary second/third molar

What is the main landmark for a nasopalatine nerve block?

Incisive papilla

Where is the incisive papilla?

Behind the maxillary central incisors.

What is the main landmark for maxillary infiltration?

Mucobuccal fold near the tooth apex.

What is the mucobuccal fold?

The fold where the cheek meets the gum.

What are the main landmarks for a PSA block?

Maxillary molar region and maxillary tuberosity

What is the maxillary tuberosity?

The rounded area behind the last maxillary molar

What is the main landmark for an MSA injection?

Maxillary premolar region.

What is the main landmark for an ASA injection?

Maxillary canine/premolar region

What are the 4 key landmarks to remember for an IANB?

Coronoid notch, pterygomandibular raphe, occlusal plane and mandibular foramen.

What landmark is associated with the mental nerve?

Mental foramen

What landmark is associated with the greater palatine nerve?

Greater palatine foramen

What landmark is associated with the nasopalatine nerve?

Incisive papilla