Presentation on theme: "Eruption By: A.RashedM. Assistant Professor of Pediatric Dentistry."— Presentation transcript:
Eruption By: A.RashedM. Assistant Professor of Pediatric Dentistry
How eruption happens?! Elongation of tooth root Forces exerted by vascular tissues around the tooth Hormonal influnces Alveolar crest resorption Growth and pull of periodontal membrane …
Eruption and tooth development. 1. the crown cal. Completes the tooth begins its migration 2. 2/3 of root cal. Completes the tooth emerges into soft tissue 3. ¾ of root cal. Completes the tooth emerges into oral cavity
Why does emergence of teeth happen at different times?
Problems associated with eruption in primary teeth Illingworth and Tasanen study: YES NO Daytime restlessness Infection Finger sucking Temperature rise Rubbing of the gum Diarrhea Increase in drooling Coughing Some loss of appetite Sleep disturbances
What if signs not related to eruption be mistaken as eruption signs?!
Treatment in primary teeth? 1. With successor 2. Without successor
Major contrasts between primary and permanent teeth 1.Anterior teeth: higher crown width (M-D)/ crown length 2. Anterior teeth: narrower and longer roots with wide crowns (cervical third view)-comparatively- 3.Primary molar: slender and longer roots that flare beyond the outline of the crown –comparatively- There is no trunk, each root directly comes from the crown 4. More prominent cervical ridge: buccal, lingual, labial 5. Primary molar: more slender at their cervical portion mesiodistally (bulby)
Major contrasts between primary and permanent teeth 6. Primary molar: : buccal and lingual surfaces are flatter which result in a narrower occlusal surface (bulby) 7. Primary molars: Buccal cervical ridges are much more pronounced especially D 8.Less pigmentation, and whiter 9. The pulp chamber is relatively larger in all dimensions, pulp horns are high 10. The enamel is relatively thin, the dentine thickness is limited 11. Primary teeth are smaller than permanent teeth