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Encyclopedia > Maxillary first molar
Human Teeth
Maxillary teeth
Mandibular teeth
Maxillary first molar
Maxillary first molar
Maxillary first molars of permanent and primary teeth marked in red.

The maxillary first molar is the tooth located laterally (away from the midline of the face) from both the maxillary second premolars of the mouth but mesial (toward the midline of the face) from both maxillary second molars. The function of this molar is similar to that of all molars in regard to grinding being the principle action during mastication, commonly known as chewing. There are usually four cusps on maxillary molars, two on the buccal (side nearest the cheek) and two palatal (side nearest the palate). There are great differences between the deciduous (baby) maxillary molars and those of the permanent maxillary molars, even though their function are similar. It is important to note that the permanent maxillary molars are not considered to have any teeth that precede it. Despite being named molars, the deciduous molars are followed by permanent premolars. The maxillary sinus is the largest paranasal sinus. ... Types of teeth Molars are used for grinding up foods Carnassials are used for slicing food. ... Incisors are the first kind of tooth in heterodont mammals. ... The maxillary central incisor is usually the most visible tooth, since it is the top center two teeth in the front of a mouth, and it is located mesial (closer to the midline of the face) to the maxillary lateral incisor. ... The maxillary canine is the tooth located laterally (away from the midline of the face) from both maxillary lateral incisors of the mouth but mesial (toward the midline of the face) from both maxillary first premolars. ... The premolar teeth or bicuspids are transitional teeth located between the canine and molar teeth. ... Molar 47 (left), molar 46 and premolar 45(right) Molars are the rearmost and most complicated kind of tooth in most mammals. ... The mandible (inferior maxillary bone) (together with the maxilla) is the largest and strongest bone of the face. ... Types of teeth Molars are used for grinding up foods Carnassials are used for slicing food. ... Incisors are the first kind of tooth in heterodont mammals. ... The mandibular central incisor is the tooth located adjacent to the midline of the face and is mesial (toward the midline of the face) from both mandibular lateral incisors. ... The mandibular lateral incisor is the tooth located distally (away from the midline of the face) from both mandibular central incisors of the mouth and mesially (toward the midline of the face) from both manibular canines. ... The mandibular canine is the tooth located distally (away from the midline of the face) from both mandibular lateral incisors of the mouth but mesially (toward the midline of the face) from both mandibular first premolars. ... The premolar teeth or bicuspids are transitional teeth located between the canine and molar teeth. ... The mandibular first premolar is the tooth located laterally (away from the midline of the face) from both the mandibular canines of the mouth but mesial (toward the midline of the face) from both mandibular second premolars. ... The mandibular second premolar is the tooth located distally (away from the midline of the face) from both the mandibular first premolars of the mouth but mesial (toward the midline of the face) from both mandibular first molars. ... Molar 47 (left), molar 46 and premolar 45(right) Molars are the rearmost and most complicated kind of tooth in most mammals. ... The mandibular first molar is the tooth located distally (away from the midline of the face) from both the mandibular second premolars of the mouth but mesial (toward the midline of the face) from both mandibular second molars. ... The mandibular second molar is the tooth located distally (away from the midline of the face) from both the mandibular first molars of the mouth but mesial (toward the midline of the face) from both mandibular third molars. ... The mandibular third molar is the tooth located distally (away from the midline of the face) from both the mandibular second molars of the mouth with no tooth posterior to it in permanent teeth. ... Types of teeth Molars are used for grinding up foods Carnassials are used for slicing food. ... Faces of Mother, Child. ... Sagittal section of nose mouth, pharynx, and larynx. ... A molar is the fourth kind of tooth in mammals. ... Mastication or chewing is the process by which food is torn and/or crushed by teeth. ... In common parlance, a cusp is an important moment usually regarded as a decision point upon which consequent events are determined. ... The palate is the roof of the mouth in humans and vertebrate animals. ... ...


In the universal system of notation, the deciduous maxillary first molars are designated by a letter written in uppercase. The right deciduous maxillary first molar is known as "B", and the left one is known as "I". The international notation has a different system of notation. Thus, the right deciduous maxillary first molar is known as "54", and the left one is known as "64".


In the universal system of notation, the permanent maxillary first molars are designated by a number. The right permanent maxillary first molar is known as "3", and the left one is known as "14". In the Palmer notation, a number is used in conjunction with a symbol designating in which quadrant the tooth is found. For this tooth, the left and right first molars would have the same number, "6", but the right one would have the symbol, "┘", underneath it, while the left one would have, "└". The international notation has a different numbering system than the previous two, and the right permanent maxillary first molar is known as "16", and the left one is known as "26".


References

  • Ash, Major M. and Stanley J. Nelson, 2003. Wheeler’s Dental Anatomy, Physiology, and Occlusion. 8th edition.

  Results from FactBites:
 
Importance Of Maxillary First Molar For Sex Determination (1056 words)
Amongst all the teeth, the maxillary first molar is found to exhibit greatest sexual dimorphism.
The B-L diameter of maxillary first molar was measured with vernier calliper (resolution 0.02 mm) intraorally in patient as well as on the cast.
From the range of B-L diameter of molar it can be concluded that whenever the B-L diameter of maxillary first molar is greater than 10.7 mm the probability of sex being male is 100%, from the present study, this finding could prove to be of immense medico-legal importance in sex determination of human being.
The District of Columbia Academy of Veterinary Medicine (11802 words)
The maxillary fourth premolar is a tri-rooted tooth with a large distal root and 2 mesial roots (mesiobuccal and mesiopalatal) emanating from a common root trunk.
Therefore, since the first molar is being extracted, it may serve as a lever fulcrum for the periodontal elevator in extraction of the fourth premolar (Fig 7).
Likewise, the crown of the second molar may be used as a lever fulcrum to aid extraction of the first molar.
  More results at FactBites »


 

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