Teeth abnormalities

Question 1

What is the most commonly lost tooth order?

Answer 1

M3>PM2>LI

Question 2

What is the most common alteration in teeth development?

Answer 2

Hypodontia (missing at least 1 or more teeth not including M3)

Question 3

What is anhidrosia, and what does it make people prone to?

Answer 3

Inability to sweat, prone to fevers

Question 4

Oligodontia

Answer 4

lack of 6 or more teeth

Question 5

Cleidocranial dysplasia impacts the clavicle in what way?

Answer 5

Poorly developed or absent

Question 6

How does cleidocranial dysplasia impact the teeth?

Answer 6

Excessive teeth (like a shark)

Question 7

What gene is mutated in cleidocranial dysplasia?

Answer 7

RUNX2 mutation

Question 8

What is Riga-Fede disease, and how does it impact the child’s eating habits?

Answer 8

There is an ulcer on the ventral side of the tongue/lower lip. This can make breast feeding problematic

Question 9

Why does ankylosis cause a when sound when tapped?

Answer 9

The cementum or dentine of a tooth root are fused to the alveolar bone, meaning there is no PDL, which causing a weird sound with tapping/auscultation

Question 10

What is the photosylid?

Answer 10

The mandibular version of the Cusp of Carabelli

Question 11

What is a talon cusp?

Answer 11

An enlarged cingulum making it as tall as a cusp

Question 12

Dens evaginatus: what tooth is impacted, and excess of what two types of mineralized cause this?

Answer 12

You have a shovel-shaped incisor, due to an excess of enamel and dentin

Question 13

What are Wormian bones?

Answer 13

Abnormal intrasutural bones that are secondary to delayed suture closing

Question 14

What teeth are impacted by ectopic enamel, and what does this do to attachment of these teeth?

Answer 14

Usually the maxillary and mandibular molars, causing lesser attachment

Question 15

What is taurodontism?

Answer 15

The body of the tooth and pulp chamber is enlarged vertically, causing the floor of the pulp and the furcation of the tooth to move apically

Question 16

What is dens invaginatus?

Answer 16

There is an infolding of enamel into dentine; can cause a dilated odontoma when severe, which is a spherical masss

Question 17

What’s the difference between gemination and fusion?

Answer 17

Gemination: the tooth count is normal when the anomalous tooth is counted as one
Fusion: there is one less tooth when counting when the anomalous tooth is counted as one

Question 18

What is dilaceration?

Answer 18

Abnormal bending of the tooth, could be due to the tooth being blocked

Question 19

Globodontia; what syndrome is globontia associated with?

Answer 19

The teeth are “funny-shaped” or look like sausages; a part of otodental symptom

Question 20

Lobodontia: definition, and its rarity

Answer 20

Wolf-like teeth, and it’s rare

Question 21

Amelogenisi imperfecta: What is this an abnormality of, and what genes are mutated?

Answer 21

Abnormal enamel, mutated AMELX/ENAM genes

Question 22

How does hypoplastic AI impact the teeth?

Answer 22

Usually pits in teeth

Question 23

How does hypomaturation AI impact the interproximal space by doing what to the enamel?

Answer 23

The interproximal spaces are open since the enamel is thin

Question 24

How does hypocalcification AI impact the enamel?

Answer 24

There is an abnormal thickness of the enamel (but it is not good quality)

Question 25

Dentinogenesis imperfect: Is it seen on both primary and permanent teeth? What gene is mutated, what does it actually weaken, and by what age is a patient with this condition edentulous?

Answer 25

On primary and permanent teeth, caused by DSPP mutation, causes weak dentin, and the patient is edentulous by age 40

Question 26

What happens to the radicular root with dentin dysplasia type 1?

Answer 26

The radicular root is disorganized

Question 27

Can regional odontodysplasia occur in primary and permanent teeth? What is abnormal about the enamel and dentin?

Answer 27

It can occur in primary and permanent teeth, and the enamel and dentin are thin

Question 28

What are hamartomas?

Answer 28

Benign neoplasm of tissue elements

Question 29

What two signs are characteristic of osteogenesis imperfecta?

Answer 29

Blue eyes and blue teeth

Question 30

How does Turner hypoplasia manifest in teeth?

Answer 30

Missing or diminished enamel on permanent teeth

Question 31

What is exanthematous fever?

Answer 31

Rash on skin due to Measles, Rubella, and Varicella

Question 32

What is Hutchinson’s teeth a sign of, and what happens to the teeth?

Answer 32

It is a sign of congenintal syphilis, and the teeth are smaller and more widely-space than normal, as well as “notches” on the occlusal surfaces; the middle third of the tooth will be the widest

Question 33

Hyperblastoma: What disease is it related to, and can happen when implants are placed?

Answer 33

Paget disease; sometimes during implantation, the body can have negative feedback since it may not recognize it as self

Question 34

What is Gunther’s disease?

Answer 34

An imbalance of heme metabolic products, leading to the teeth turning red

Question 35

What is chlorodontia?

Answer 35

Green teeth, from bilirubin in the blood

Question 36

What medication turns teeth grey, whichi s used to treat RA and acne

Answer 36

Minocycline HCl

Question 37

What is demastication?

Answer 37

Accelerated tooth wear from chewing on abrasive substances (atrition + abrasion)

Question 38

What is abfraction?

Answer 38

Non-carious tooth loss along the gingival margin, so it is mechanical in nature (i.e. eccentric forces)