DENTAL DENTAL MORPHOLOGICAL MORPHOLOGICAL

TERMSTERMS

Dental Anatomy & OcclusionDental Anatomy & Occlusion

Dent 202Dent 202

IntroductionIntroduction

• Human dentition is diphyodontHuman dentition is diphyodont– Primary (deciduous/ predecessor) Primary (deciduous/ predecessor)

dentitiondentition• Formula: Formula: I 2/2 C 1/1 M 2/2I 2/2 C 1/1 M 2/2• Eruption: 6 months - 28±4 monthsEruption: 6 months - 28±4 months• Shedding: 6 to12 yearsShedding: 6 to12 years

– Secondary (permanent/successor) Secondary (permanent/successor) dentitiondentition• Formula: Formula: I 2/2 C 1/1 P 2/2 M 3/3I 2/2 C 1/1 P 2/2 M 3/3• Eruption: 6 to (18-25) yearsEruption: 6 to (18-25) years

Stages of human Stages of human dentitiondentition

• Edentulous stage: 0 - 6 monthsEdentulous stage: 0 - 6 months• Eruption of primary dentition: 6 Eruption of primary dentition: 6

months-2.5 yearsmonths-2.5 years• Functioning primary dentition: 2.5 – 6 Functioning primary dentition: 2.5 – 6

yearsyears• Mixed dentition: 6 – 12 yearsMixed dentition: 6 – 12 years• Permanent dentition: 12+ yearsPermanent dentition: 12+ years• Full permanent dentition: (18-25)+ Full permanent dentition: (18-25)+

yearsyears

Dental terms Dental terms

• Dental arch: maxillary and mandibularDental arch: maxillary and mandibular• Tooth classTooth class

– Incisor: incisal edgeIncisor: incisal edge– Canine: one pointed cuspCanine: one pointed cusp– Premolar (bicuspid): 2 cuspsPremolar (bicuspid): 2 cusps– Molar: 3 or more flattened cuspsMolar: 3 or more flattened cusps

• Identification traitsIdentification traits– Set traitsSet traits– Arch traitsArch traits– Class traitsClass traits– Type traitsType traits

Terms related to Terms related to anterior teethanterior teeth

– Anterior teethAnterior teeth– SurfacesSurfaces– Line angleLine angle– Point angle Point angle – Incisal edgeIncisal edge– CuspCusp– CingulumCingulum– FossaFossa– Ridge and marginal ridgeRidge and marginal ridge– Cervical lineCervical line– LobeLobe– MamelonMamelon– Lingual pitLingual pit– Developmental grooveDevelopmental groove– Division into thirdsDivision into thirds– Contact pointContact point

• Cusp ridgeCusp ridge• Triangular ridgeTriangular ridge• Transverse ridgeTransverse ridge• Oblique ridgeOblique ridge• Pit Pit • Developmental Developmental

groovegroove• Supplemental grooveSupplemental groove• Triangular fossaTriangular fossa• Central fossaCentral fossa

Terms related to Terms related to posterior teethposterior teeth

Division into thirdsDivision into thirds

Division into thirdsDivision into thirds