Mandibular first molar

Mandibular first molar

The Mandibular first molar or first lower 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 function of this molar is to grind and chew food, similar to all other molars.

Etymology

The term "mandibular" is derived from the Latin word "mandibula" which means "jaw" or "jawbone". The term "molar" is derived from the Latin word "mola" which means "millstone".

Anatomy

The mandibular first molar is the largest tooth in the human dentition. It has five cusps, two buccal (cheek side), two lingual (tongue side), and one distal. The mesial (front) surface of the tooth has two roots, one mesial and one distal. The distal (back) surface of the tooth has one root.

Development

The mandibular first molar is typically the first tooth to erupt in the permanent dentition, usually around the age of six years. The roots continue to develop and the tooth is usually fully formed by the age of nine years.

Clinical significance

The mandibular first molar is often the first tooth to show signs of dental caries due to its early eruption. It is also often the first tooth to be lost due to caries or periodontal disease.

Related terms

• Mandibular second molar
• Mandibular third molar
• Mandibular incisors
• Mandibular canines
• Mandibular premolars

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