introduction to dental morphology

Introduction to Dental Morphology

Dr. Syed SadatullahAssistant ProfessorCollege of Dentistry

King Khalid University

Introduction to Dental Introduction to Dental MorphologyMorphology

What is ‘anatomy’?What is ‘anatomy’?

The science dealing with the structure of animals The science dealing with the structure of animals and plants.and plants.

What is ‘morphology’?What is ‘morphology’?

The branch of biology dealing with the form and The branch of biology dealing with the form and structure of organisms/parts of body. structure of organisms/parts of body.

Dr.Syed SadatullahDr.Syed Sadatullah

Why study dental morphology?Why study dental morphology?

It provides one of the basic components of skills It provides one of the basic components of skills needed to practice all apects of dentistry. Without needed to practice all apects of dentistry. Without the correct knowledge of tooth morphology it is the correct knowledge of tooth morphology it is impossible to accurately replace a tooth or part of impossible to accurately replace a tooth or part of a tooth in the oral cavity.a tooth in the oral cavity.


What are teeth?What are teeth?

Teeth are hard mineralized appendages that are Teeth are hard mineralized appendages that are found in jaws.found in jaws.


Functions of teethFunctions of teeth MasticationMastication

SpeechSpeech


AestheticsAesthetics

Integrity of Alveolar boneIntegrity of Alveolar bone

Integrity of dental archesIntegrity of dental arches


Parts of toothParts of tooth Crown and RootCrown and Root

clinical crown anatomical crownclinical crown anatomical crown

Enamel, Dentine, CementumEnamel, Dentine, Cementum

and Pulpand Pulp


Division of teeth depending upon morphology Division of teeth depending upon morphology (Hetrodont)(Hetrodont)

1.1. IncisorsIncisors

2.2. CaninesCanines

3.3. PremolarsPremolars

4.4. MolarsMolars


Two sets of teeth (Diphyodont)Two sets of teeth (Diphyodont) Primary teeth. Also called the deciduous teeth Primary teeth. Also called the deciduous teeth

or the milk teeth. They are 20 in number.or the milk teeth. They are 20 in number. Permanent teeth. They are 32 in number.Permanent teeth. They are 32 in number.


Differences between primary and permanent teethDifferences between primary and permanent teeth

Primary teethPrimary teeth Permanent teethPermanent teeth 2020 smallersmaller premolars not presentpremolars not presentbig pulp chambers & high big pulp chambers & high pulp hornspulp horns dental arches smallerdental arches smaller root resorps teeth root resorps teeth exfoliateexfoliate cervical ridges more cervical ridges more prominentprominent roots narrowerroots narrower molar roots flare moremolar roots flare more enamel thin & more enamel thin & more opaqueopaque mamelons absentmamelons absent

3232 biggerbigger 8 premolars present8 premolars presentsmall pulp chambers small pulp chambers

dental arches biggerdental arches bigger healthy tooth doesn’t healthy tooth doesn’t exfoliateexfoliate less prominentless prominentroots broaderroots broader flare lessflare less enamel thickerenamel thicker mamelons may be mamelons may be presentpresent

Stages of human dentionStages of human dentionPrimary dentition or deciduous dentition (8 to 30 Primary dentition or deciduous dentition (8 to 30

months)months)Primary dentition begins with the eruption first Primary dentition begins with the eruption first primary tooth which is mandibular central primary tooth which is mandibular central incisor at the age of 8 months and ends with incisor at the age of 8 months and ends with the eruption of primary maxillary second the eruption of primary maxillary second molar at age of 30 monthsmolar at age of 30 months

Mixed dentition (6 to 12 years)Mixed dentition (6 to 12 years)Mixed dentition begins with the eruption of Mixed dentition begins with the eruption of first permanent tooth which is lower first molar first permanent tooth which is lower first molar at the age of 6 years and ends with the at the age of 6 years and ends with the eruption of permanent second molar at the eruption of permanent second molar at the age of 12 yearsage of 12 years

Permanent dentitionPermanent dentition (12 years onwards)(12 years onwards)Permanent dentition stage starts when the last Permanent dentition stage starts when the last primary tooth exfoliates.primary tooth exfoliates.


introduction to dental morphology

Education