Incisive Bone

The incisive bone is the portion of the maxilla adjacent to the incisors. It is a pair of small cranial bones at the very tip of the jaws of many animals, usually bearing teeth, but not always. They are connected to the maxilla and the nasals.

The term premaxilla can also be used to refer to the incisive bone.

Bones of head and neck: the facial skeleton of the skull (TA A02.1.08–15, GA 2.156–177)
Maxilla
Surfaces
  • Anterior: fossae (Incisive fossa, Canine fossa)
  • Infraorbital foramen
  • Anterior nasal spine
  • Infratemporal: Alveolar canals
  • Maxillary tuberosity
  • Orbital: Infraorbital groove
  • Infraorbital canal
Nasal: Greater palatine canal
Processes
  • Zygomatic process
  • Frontal process (Agger nasi, Anterior lacrimal crest)
  • Alveolar process
  • Palatine process (Incisive foramen, Incisive canals, Foramina of Scarpa, Incisive bone, Anterior nasal spine)
Other
  • Body of maxilla
  • Maxillary sinus
Zygomatic
  • Orbital process (Zygomatico-orbital)
  • Temporal process (Zygomaticotemporal)
  • Lateral process (Zygomaticofacial)
Palatine
Fossae
  • Pterygopalatine fossa
  • Pterygoid fossa
Plates
  • Horizontal plate (Posterior nasal spine)
  • Perpendicular plate (Greater palatine canal, Sphenopalatine foramen, Pyramidal process)
Processes
  • Orbital
  • Sphenoidal
Mandible
Body
  • external surface (Symphysis menti, Lingual foramen, Mental protuberance, Mental foramen, Mandibular incisive canal)
  • internal surface (Mental spine, Mylohyoid line, Sublingual fovea, Submandibular fovea)
  • Alveolar part of mandible
Ramus
  • Mylohyoid groove (Mandibular canal, Lingula)
  • Mandibular foramen
  • Angle
  • Coronoid process
  • Mandibular notch
  • Condyloid process
  • Pterygoid fovea
Minor/
nose
  • Nasal bone: Internasal suture
  • Nasal foramina
  • Inferior nasal concha: Ethmoidal process
  • Maxillary process
  • Vomer: Vomer anterior
  • Synostosis vomerina
  • Vomer posterior (Wing)
  • Lacrimal: Posterior lacrimal crest
  • Lacrimal groove
  • Lacrimal hamulus

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