The frontal process protrudes posterosuperiorly in the middle of the nasal and lacrimal bones.
- Lateral surface is separated through a vertical ridge known as anterior lacrimal crest within anterior and posterior portions.
- The posterior part is dented and creates a portion of lacrimal fossa.
- Lacrimal crest gives connection to the medial palpebral ligament and is constant inferiorly with the infraorbital margin.
- The smooth area anterior towards the lacrimal crest merges inferiorly with the anterior surface of the body of the maxilla.
- Parts of orbicularis oculi as well as levator labii superioris alaeque nasi are fixed at this location.
- A vertical groove and a groove on the lacrimal bone merge with each other behind the crest in order to create the lacrimal fossa.
It is part of the lateral nasal wall.
- A rough subapical area joins together with the ethmoid and covers anterior ethmoidal air cells.
- The medial surface of the frontal process is marked through a horizontal rim referred to as ethmoidal crest.
- An oblique ethmoidal crest joins posteriorly together the middle nasal concha and anteriorly underlies a ridge anterior towards the concha on the lateral nasal wall referred to as the agger nasi.
- The upper limit of the atrium of the middle meatus is created by the ethmoidal crest.
- It protrudes upwards as well as joins with the frontal bone.
- Due to distribution of force of impact from teeth towards the base of the skull, the thick frontal process is located in the line of buttress.
- It slants downwards and forwards, and merges with the middle nasal concha.
- The atrium of the middle meatus is created by an area under the ethmoidal crest.