MORPHOLOGICAL ANOMALIES OF SHAPE OF PERMANENT TEETH
A/ – Physiological variations
On a normal tooth, that is to say at the end of root formation, the pulp cavity has the following characteristics:
-Its large volume, especially for the pulp chamber
-The root canals have a very regular pattern, clearly visible on the X-ray; their foramina only show a slight narrowing.
Dentinogenesis often has the effect of considerably reducing the volume of the pulp cavity to the point of almost making it disappear.
Secondary dentin is deposited on the walls of the cavity; but the thickness of the newly formed layer varies according to its location; the maximum thickness is located on the floor of the pulp chamber, then comes the ceiling, the layer of the lateral walls of the chamber and the canals is thinner
B/- Pathological variations
- DEFINITION OF ANOMALY:
An anomaly is a deviation from normal, often originating during embryonic development and resulting in the deformation of certain parts of the body.
- Size and shape anomalies:
2.1. Variation in tooth size:
- Microdontia (very small, but normally shaped teeth)
- Macrodontia (very large, but normally shaped tooth.
- The most commonly affected teeth by macrodontia are the incisors and canines. While microdontia mainly affects the lateral incisors and maxillary third molars
Macrodontia limited to a single incisor Microdontics
upper side
2.2. Concrescence:
- Is a form of superficial fusion or growth of two
adjacent teeth at the root level but only via
their cementum. This anomaly most often concerns
the maxillary molar region
2.3. gemination:
- Or twinning is the result of division or splitting
of a single tooth in the process of development (tooth germ). . As the division of the crown is not complete; the split crown appears
twice as wide. The single root is not divided and
has a common pulp canal
2.4. Merger:
- It is the union of two adjacent tooth germs at the level of the dentin. Fusion seems to be similar to gemination since the coalescing teeth have a crown twice as large as normal. However; the major difference with gemination is the frequent presence of two distinct roots; with separate pulp chambers; which is visible on an X-ray.
Fusion of the 2nd and 3rd lower molars
2.5. Invaginated teeth:
- Or dens in dente (tooth within the tooth) is an anomaly of
development resulting from invagination of the enamel into the
crown of the tooth. Clinically it takes the appearance of a
deep crevice, located in the region of the cingulum of the incisors.
On an X-ray the dens in dente looks like a mass.
compact enamel stretched within the dentin of a tooth
normal size
2.6. Coronary tubercles and enamel pearl:
- tubercles all teeth may have small
enamel projections, called tubercles: this is enamel projection
are the result of localized hyperplasia during development
(increase in tissue volume linked to the growth of new cells)
- Enamel pearls are small rounded nodules with a
tiny heart of dentin. They are frequently found on the
distal surface of the third molars and on the vestibular bifurcation
roots of molars. On the X-ray; enamel pearls
appear as small, rounded radiopacities
(which are clear or white on the X-ray film)
2.7. Taurodontism:
- in the case of taurodontia or “prism tooth”; the pulp chamber is very long and does not present any constriction at the
level of the enamel- cementum junction .
MORPHOLOGICAL ANOMALIES OF SHAPE OF PERMANENT TEETH
Impacted wisdom teeth may require surgery.
Zirconia crowns are durable and aesthetic.
Bleeding gums may indicate periodontitis.
Invisible orthodontic treatments are gaining popularity.
Invisible orthodontic treatments are gaining popularity.
Modern dental fillings are both durable and discreet.
Interdental brushes are ideal for narrow spaces.
Good dental hygiene reduces the risk of cardiovascular disease.
MORPHOLOGICAL ANOMALIES OF SHAPE OF PERMANENT TEETHMORPHOLOGICAL ANOMALIES OF SHAPE OF PERMANENT TEETH
A/ – Physiological variations
On a normal tooth, that is to say at the end of root formation, the pulp cavity has the following characteristics:
-Its large volume, especially for the pulp chamber
-The root canals have a very regular pattern, clearly visible on the X-ray; their foramina only show a slight narrowing.
Dentinogenesis often has the effect of considerably reducing the volume of the pulp cavity to the point of almost making it disappear.
Secondary dentin is deposited on the walls of the cavity; but the thickness of the newly formed layer varies according to its location; the maximum thickness is located on the floor of the pulp chamber, then comes the ceiling, the layer of the lateral walls of the chamber and the canals is thinner
B/- Pathological variations
- DEFINITION OF ANOMALY:
An anomaly is a deviation from normal, often originating during embryonic development and resulting in the deformation of certain parts of the body.
- Size and shape anomalies:
2.1. Variation in tooth size:
- Microdontia (very small, but normally shaped teeth)
- Macrodontia (very large, but normally shaped tooth.
- The most commonly affected teeth by macrodontia are the incisors and canines. While microdontia mainly affects the lateral incisors and maxillary third molars
Macrodontia limited to a single incisor Microdontics
upper side
2.2. Concrescence:
- Is a form of superficial fusion or growth of two
adjacent teeth at the root level but only via
their cementum. This anomaly most often concerns
the maxillary molar region
2.3. gemination:
- Or twinning is the result of division or splitting
of a single tooth in the process of development (tooth germ). . As the division of the crown is not complete; the split crown appears
twice as wide. The single root is not divided and
has a common pulp canal
2.4. Merger:
- It is the union of two adjacent tooth germs at the level of the dentin. Fusion seems to be similar to gemination since the coalescing teeth have a crown twice as large as normal. However; the major difference with gemination is the frequent presence of two distinct roots; with separate pulp chambers; which is visible on an X-ray.
Fusion of the 2nd and 3rd lower molars
2.5. Invaginated teeth:
- Or dens in dente (tooth within the tooth) is an anomaly of
development resulting from invagination of the enamel into the
crown of the tooth. Clinically it takes the appearance of a
deep crevice, located in the region of the cingulum of the incisors.
On an X-ray the dens in dente looks like a mass.
compact enamel stretched within the dentin of a tooth
normal size
2.6. Coronary tubercles and enamel pearl:
- tubercles all teeth may have small
enamel projections, called tubercles: this is enamel projection
are the result of localized hyperplasia during development
(increase in tissue volume linked to the growth of new cells)
- Enamel pearls are small rounded nodules with a
tiny heart of dentin. They are frequently found on the
distal surface of the third molars and on the vestibular bifurcation
roots of molars. On the X-ray; enamel pearls
appear as small, rounded radiopacities
(which are clear or white on the X-ray film)
2.7. Taurodontism:
- in the case of taurodontia or “prism tooth”; the pulp chamber is very long and does not present any constriction at the
level of the enamel- cementum junction .
MORPHOLOGICAL ANOMALIES OF SHAPE OF PERMANENT TEETH
Impacted wisdom teeth may require surgery.
Zirconia crowns are durable and aesthetic.
Bleeding gums may indicate periodontitis.
Invisible orthodontic treatments are gaining popularity.
Invisible orthodontic treatments are gaining popularity.
Modern dental fillings are both durable and discreet.
Interdental brushes are ideal for narrow spaces.
Good dental hygiene reduces the risk of cardiovascular disease.
MORPHOLOGICAL ANOMALIES OF SHAPE OF PERMANENT TEETH