Permanent molars have a tendency to move toward the midline of the mouth. If there is a space between the permanent or primary teeth those teeth would be pushed forward closing up any space that was available.
Mesial Occlusal
When the mesial buccal cusp of the maxillary first molar is distal to the mesial buccal cusp of the mandibular first molar.
There's my answer
Mesial refers to the side or surface of a structure that is closer to the midline of the body or to a specific reference point. In dentistry, it is used to describe a tooth surface that is closer to the front of the mouth.
The concavity that forms on the mesial aspect of maxillary first premolars is called the cuspid groove. It is the result of the first premolar having both a buccal and palatal root. The groove functions as an alignment guide for the maxillary cuspid as it descends into the mouth.
MF is short for Mesial Facial, which are surfaces on your tooth. Mesial is the surface of your tooth that is on the side closest toward the center of your mouth. Facial is the surface of your tooth that touches your lips.
The abnormalities most associated with mesial TLE are sclerosis (scarring) of the hippocampus, neuronal cell loss in the hippocampal area, and inappropriate sprouting (growth) of mossy cell fibers.
In mesial TLE, seizure can begin as early as childhood or even later in adulthood. There is a characteristic remission that can occur during childhood, lasting a few years, but then seizures resume in adulthood.
Mesial, Distal, Lingual (or Palatal), Buccal (or Facial), and Occlusal (or Incisal)
Of or pertaining to an arrow; resembling an arrow; furnished with an arrowlike appendage., Of or pertaining to the sagittal suture; in the region of the sagittal suture; rabdoidal; as, the sagittal furrow, or groove, on the inner surface of the roof of the skull., In the mesial plane; mesial; as, a sagittal section of an animal.
In primary teeth, the ideal occlusal scheme is
Of or pertaining to the sides; as, the lateral walls of a house; the lateral branches of a tree., Lying at, or extending toward, the side; away from the mesial plane; external; -- opposed to mesial., Directed to the side; as, a lateral view of a thing.