Understanding Primary Tooth Development and Eruption

Explore the stages of tooth development and eruption in primary teeth, from induction to eruption, with details on mineralization, eruption times, symptoms, disturbances, and primary dentition characteristics. Learn about common issues and the relationship between primary teeth and permanent teeth.

• Tooth development
• Primary teeth
• Eruption
• Dentition
• Dentistry

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1. Tooth development, eruption and anatomy of primary teeth

2. Tooth development Inductio (6-7thweek i.u.) Initation stage dental lamina Proliferatio Toothbud (8th week) Cap stage (9-10th week) Histodifferentiatio Bell stage(11-12th week) Toothgerm Calcificatio Enamel Dentin Eruptio Root (Hertwig s epithelial seath)

3. Eruption A. Preeruptiv stage B. Eruptiv prefunctional stage C. Posteruptiv functional stage The reduced enamel epithelium fused with the oral epithelium lining the oral cavity

4. Mineralisatio Primary dentition Incisors: 17th embrional week Molars: ca. 20th embrional week Birth: Incisors: crown formation almost completed Canines: crown up to the ; Molars: crown up to the .

5. Eruptio dentis decidui Average eruption times: in month; Usually the lower teeth are erupting first; Crown development: at 2 years completed; Root development: 1 1 years later; Tootharch shapes: U .

6. Average eruption times Month Primary teeth Schopf Feh r First incisors 6-10 8.-12. Lateral incisors 10-14 9-13 Canines 18-24 16-22 First molars 14-18 13-19 Second molars 24-30 25-33

7. Simptoms of primary teeth eruption pain; higher salivary flux, chewing; digestive disorders temperature(37 - 38 C); irritability; Sleep disorders.

8. Disturbances during dentition dentitio praecox dentitio tarda dentitio difficilis eruption cysts dens connatalis (dens praelactales) dens neonatale

9. Primary dentition no diastemas fiziological diastemas Relation between the roots of the primary teeth and the crows of the permanent tooth.

10. Forrss: Ch. Splieth: Kinderzahnheilkunde in der Praxis, Quintessence Verlag, 2002. Anatomy of primary teeth they are usually smaller then the permanent rare individuall variarion colour: blue-white enamel mineralisation cervically: cingulum thinner layer of enamel and dentin rooths are small, fracturing often Wide pulp wi fiziological root resrption: genetical M hlreiter sighns

11. Mixed dentition Form Okklusal abrasio Size 0 - missing Color 1 - enamel Abrasio 2 - dentin Mobility (Root resorptio)

12. https://www.youtube.com/watch?v=Cjv3ENPR9fo&list =UURRXNQCNkMd1_i0BBP-IRJQ https://www.youtube.com/watch?v=zLiV-b1jS28#t=11 https://www.youtube.com/watch?v=RxR1iwa69C0 https://www.youtube.com/watch?v=0pzIRg8cW4A#t=7 3 https://www.youtube.com/watch?v=RxR1iwa69C0#t=3 22 https://www.youtube.com/watch?v=5H40I25xR1w