Dental anomalies Flashcards Preview

Dental Science > Dental anomalies > Flashcards

Flashcards in Dental anomalies Deck (25)
Loading flashcards...
1
Q

Partial anodontia is…

A

One or more missing teeth from a dentition

2
Q

The cause of partial anodontia is thought to be…

A

Hereditary

3
Q

Are anomalies more prevalent in permanent or primary dentition?

A

Permanent

4
Q

Name the anomaly where a small supernumerary tooth is located between central incisors

A

Mesiodens

5
Q

Supernumerary teeth are most frequent in what regions?

A

Maxillary incisors & maxillary third molars

6
Q

A tooth that has undergone gemination has…

A

A single, unsplit root with a common pulp canal

7
Q

What is gemination/twinning?

A

Incomplete tooth division where the single forming tooth splits; crown appears doubled in width

8
Q

Describe fusion

A

The union of two adjacent tooth germs involving the dentine. They have fused roots with separate pulp chambers.

9
Q

Fusion of teeth is more commonly found in…

A

Primary dentition > secondary dentition
Mandibular incisor area > maxilla

10
Q

Macrodontia impacts…

A

Incisors & canines

11
Q

Microdontia impacts…

A

Maxillary lateral incisors & third molars

12
Q

Dilaceration of a tooth refers to…

A

The severe bend/angular distortion of a tooth root

13
Q

The cause of dilaceration can be from…

A

Traumatic mouth injury or insufficient development space

14
Q

What is dens in dente?

A

“Tooth within a tooth”
Occurs due to the invagination of enamel organ within the crown of a tooth

15
Q

Dens in dente is prevalent in the…

A

Maxillary lateral incisors

16
Q

The fusion of cementum of two adjacent tooth roots is called…

A

Concrescence

17
Q

Concrescence occurs due to…

A

Excess cementum deposition and close proximity of adjacent tooth roots following eruption

18
Q

Describe hypercementosis

A

Excess cementum formation around tooth root after tooth eruption

19
Q

What are the potential causes of hypercementosis?

A

Trauma, metabolic dysfunction or periapical inflammation

20
Q

The failure of tooth eruption due to mechanical obstruction is called…

A

Impaction

21
Q

Impaction most commonly affects…

A

Maxillary & mandibular third molars

22
Q

What is ankylosis?

A

The loss of the periodontal ligament (PDL) results in the fusion of tooth root to bone

23
Q

What causes the loss of the periodontal ligament (PDL) in ankylosis?

A

Trauma or infection of the PDL

24
Q

Describe the appearance of a tooth affected by ankylosis

A

Fails to reach occlusion, appears shorter than adjacent teeth

25
Q

An ectopic tooth is…

A

A tooth bud formed out of correct position