Introduction to dental morphologyPresentation Transcript
Introduction to Dental Morphology Dr. Syed Sadatullah Assistant Professor College of Dentistry King Khalid University
Introduction to Dental Morphology What is ‘anatomy’? The science dealing with the structure of animals and plants. What is ‘morphology’? The branch of biology dealing with the form and structure of organisms/parts of body. Dr.Syed Sadatullah
Why study dental morphology?
It provides one of the basic components of skills needed to practice all apects of dentistry. Without the correct knowledge of tooth morphology it is impossible to accurately replace a tooth or part of a tooth in the oral cavity.
What are teeth?
Teeth are hard mineralized appendages that are found in jaws.
Functions of teeth
Integrity of Alveolar bone
Integrity of dental arches
Parts of tooth
Crown and Root
clinical crown anatomical crown
Enamel, Dentine, Cementum
Division of teeth depending upon morphology (Hetrodont)
Two sets of teeth (Diphyodont)
Primary teeth. Also called the deciduous teeth or the milk teeth. They are 20 in number.
Permanent teeth. They are 32 in number.
Differences between primary and permanent teeth
Primary teeth Permanent teeth
premolars not present
big pulp chambers & high pulp horns
dental arches smaller
root resorps teeth exfoliate
cervical ridges more prominent
molar roots flare more
enamel thin & more opaque
8 premolars present
small pulp chambers
dental arches bigger
healthy tooth doesn’t exfoliate
mamelons may be present
Stages of human dention
Primary dentition or deciduous dentition (8 to 30 months)
Primary dentition begins with the eruption first primary tooth which is mandibular central incisor at the age of 8 months and ends with the eruption of primary maxillary second molar at age of 30 months
Mixed dentition (6 to 12 years)
Mixed dentition begins with the eruption of first permanent tooth which is lower first molar at the age of 6 years and ends with the eruption of permanent second molar at the age of 12 years
Permanent dentition (12 years onwards)
Permanent dentition stage starts when the last primary tooth exfoliates.