| 21. | Supernumerary teeth in deciduous ( baby ) teeth are less common than in permanent teeth.
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| 22. | The teeth may be pushed around in different directions during the growth of permanent teeth.
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| 23. | Proximal caries take an average of four years to pass through enamel in permanent teeth.
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| 24. | Talon cusp tends to occur on permanent teeth only.
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| 25. | The permanent teeth can also be slow to appear.
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| 26. | Permanent teeth in the maxilla erupt in a different order from permanent teeth on the mandible.
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| 27. | Permanent teeth appear at 18 to 20 months.
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| 28. | Among permanent teeth, 16 are found in the maxilla and the other 16 in the mandible.
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| 29. | The second set, or permanent teeth, erupts later.
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| 30. | Damage to the pulp of permanent teeth usually requires a Root Canal Treatment or Endodontic Therapy.
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