Position of The Mental Foramen in A North American, white population.

By Moiseiwitsch JRD

Date: 04/1998
Journal: Oral Surg Oral Med Oral Patho

Purpose: to investigate the position of the mental foramen (MF) and assess any differences according to gender through comparison with previous studies by ethnic group.

Materials/Methods: 

N= 105 cadavers

•At least two adjacent teeth had to be present for the measurements to be included in the study

•Each MF was assessed for its horizontal relationship to the facial cusp of the nearest teeth, and vertical relationship measured in millimeters from the superior border of the foramen to the cementoenamel junction (CEJ) of the nearest tooth

•Further investigation was done to study MF symmetry in position if it exist bilaterally

•Representative samples were photographed each year to ensure reproducibility

Most highlighted Results: 

•103 Foramina from 55 cadavers were eligible for inclusion

•No difference in the distribution of the position of the MF by gender •Symmetry analysis demonstrated that frequently the MF would be in different positions

•Majority of MF were located

(1) between the first and second premolars,

(2) the second premolar and first molar, and

(3) a position in line with the crown of the second premolar. (Table. II)

•The average vertical position was  16 mm apically, with a range of 8 to 21 mm.

Clinical significance: 

MF is most commonly located between the two premolars. When administrating anesthetic solution in this region, 90% success is suspected. However, 10% of MF present in unusual positions, thereby it is important to positively identify the MF radiographically before surgery in the region.