Eruption
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?
Eruption?!
Emergence?!
Problems associated with eruption in primary teeth
Illingworth and Tasanen study:
YES NO
Daytime restlessness Infection
Finger sucking
Rubbing of the gum
Temperature rise
Diarrhea
Increase in drooling
Some loss of appetite
Coughing
Sleep disturbances
What if signs not related to eruption be mistaken as eruption signs?!
What can we do to releive pain and difficulty?
What is this?!
why does it happen?
Treatment?
Shedding of primary teeth, eruption of permanent teeth
Overretained primary teeth why may primary teeth over retain?
How should they be treated?
What do you see?
What should we do?
What do you see?
What should we do?
What do you see?
What should we do?
Ankylosis infraocclusion
Are all ankylosed teeth, necessarily infraoccluded?
Are all infraoccluded teeth, necessarily ankylosed?
How can infraocclusion and ankylosis be differentiated?
1. Radiographs
2. Percussion test
What problems may infraoccluded teeth cause?
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
Lunch and sleep!
