Permanent Teeth Development And Natural Correction Of Malocclusions
Give the eruption date and sequence of eruption of permanent teeth. Discuss various self correcting anomalies.
Answer.
Answer.
Eruption Age of Permanent Teeth
Eruption Sequence of Permanent Teeth
In Maxilla
6-1-2-4-3-5-7-8 Or 6-1-2-4-5-3-7-8
In Mandible
(6-1)-2-3-4-5-7-8 Or (6-1)-2-4-3-5-7-8
Increased Overjet
Excessive incisal overjet is often observed in deciduous dentition. 72% of children exhibited an increased overjet in a study conducted by Foster. Excessive overjet usually gets corrected later by forward growth of the mandible.
Anterior Open Bite
When there is no overlap of upper anteriors over the lower anterior such condition is known as anterior open bite. It is corrected during the eruption of primary incisors.
Retrognathic Mandible
It gets corrected with cephalocaudal growth and diffrential growth of mandible.
Infantile Swallowing Pattern
It get corrected with initiation of function at about 18 months of age.
Deep Bite
- An increased overbite is usually seen in the initial stages of development with the deciduous mandibular incisors contacting the cingulum area of the deciduous maxillary incisors in centric occlusion. Deep bite may be due to the fact that the primary incisors are more vertically placed than the permanent incisors.
- The ideal position of the deciduous incisors has been described as being more vertical than the permanentincisors, with a deeper incisal overbite.
This Deep Bite Later Gets Self-corrected By:
- Attrition of incisors.
- Eruption of deciduous molars
- Differential growth of the alveolar processes of jaws.
End on Relation
In presence of flush terminal plane the fist permanent molars assume cusp to cusp or end on molar relationship as they erupt distal to second primary molars. It gets corrected during late mesial shift
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