Processus frontalis maxillae
The processus frontalis maxillae or frontal process of the upper jaw is a bone protrusion (lat. Processus ) at the upper end of the upper jaw . It lies next to the nose , connects to the nasal bone ( os nasale ), to the back with the lacrimal bone and to the top with the parietal bone (more precisely: with the pars nasalis of the parietal bone). It is directed both upwards, to the side and backwards.
The side ( lateral ) part of the frontal extension is smooth, is in the front surface ( Fascies anterior ) of the upper jaw over and serves the levator labii superioris , the orbicularis oculi muscle and the ligament medial palpebral as a starting point.
The medial part (pointing towards the middle of the body) contributes to the formation of the lateral nasal wall, articulates at the top with the ethmoid bone (os ethmoidale) and closes the anterior ethmoid cells.
The upper ( cranial ) part of the frontal process articulates with the frontal bone , the front ( anterior ) edge with the nasal bone .
The thick rear edge of the frontal process is provided with a notch that merges into the sulcus lacrimalis maxillae of the nasal surface ( Facies nasalis ) of the upper jaw.
literature
- TH Schiebler (Ed.): Textbook of the entire human anatomy . Springer Medizin Verlag, Heidelberg 1977, ISBN 3-540-08166-6 , p. 311 ( limited preview in Google Book search).