Teeth abnormalities Flashcards
What is the most commonly lost tooth order?
M3>PM2>LI
What is the most common alteration in teeth development?
Hypodontia (missing at least 1 or more teeth not including M3)
What is anhidrosia, and what does it make people prone to?
Inability to sweat, prone to fevers
Oligodontia
lack of 6 or more teeth
Cleidocranial dysplasia impacts the clavicle in what way?
Poorly developed or absent
How does cleidocranial dysplasia impact the teeth?
Excessive teeth (like a shark)
What gene is mutated in cleidocranial dysplasia?
RUNX2 mutation
What is Riga-Fede disease, and how does it impact the child’s eating habits?
There is an ulcer on the ventral side of the tongue/lower lip. This can make breast feeding problematic
Why does ankylosis cause a when sound when tapped?
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
What is the photosylid?
The mandibular version of the Cusp of Carabelli
What is a talon cusp?
An enlarged cingulum making it as tall as a cusp
Dens evaginatus: what tooth is impacted, and excess of what two types of mineralized cause this?
You have a shovel-shaped incisor, due to an excess of enamel and dentin
What are Wormian bones?
Abnormal intrasutural bones that are secondary to delayed suture closing
What teeth are impacted by ectopic enamel, and what does this do to attachment of these teeth?
Usually the maxillary and mandibular molars, causing lesser attachment
What is taurodontism?
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
What is dens invaginatus?
There is an infolding of enamel into dentine; can cause a dilated odontoma when severe, which is a spherical masss
What’s the difference between gemination and fusion?
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
What is dilaceration?
Abnormal bending of the tooth, could be due to the tooth being blocked
Globodontia; what syndrome is globontia associated with?
The teeth are “funny-shaped” or look like sausages; a part of otodental symptom
Lobodontia: definition, and its rarity
Wolf-like teeth, and it’s rare
Amelogenisi imperfecta: What is this an abnormality of, and what genes are mutated?
Abnormal enamel, mutated AMELX/ENAM genes
How does hypoplastic AI impact the teeth?
Usually pits in teeth
How does hypomaturation AI impact the interproximal space by doing what to the enamel?
The interproximal spaces are open since the enamel is thin
How does hypocalcification AI impact the enamel?
There is an abnormal thickness of the enamel (but it is not good quality)
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?
On primary and permanent teeth, caused by DSPP mutation, causes weak dentin, and the patient is edentulous by age 40
What happens to the radicular root with dentin dysplasia type 1?
The radicular root is disorganized
Can regional odontodysplasia occur in primary and permanent teeth? What is abnormal about the enamel and dentin?
It can occur in primary and permanent teeth, and the enamel and dentin are thin
What are hamartomas?
Benign neoplasm of tissue elements
What two signs are characteristic of osteogenesis imperfecta?
Blue eyes and blue teeth
How does Turner hypoplasia manifest in teeth?
Missing or diminished enamel on permanent teeth
What is exanthematous fever?
Rash on skin due to Measles, Rubella, and Varicella
What is Hutchinson’s teeth a sign of, and what happens to the teeth?
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
Hyperblastoma: What disease is it related to, and can happen when implants are placed?
Paget disease; sometimes during implantation, the body can have negative feedback since it may not recognize it as self
What is Gunther’s disease?
An imbalance of heme metabolic products, leading to the teeth turning red
What is chlorodontia?
Green teeth, from bilirubin in the blood
What medication turns teeth grey, whichi s used to treat RA and acne
Minocycline HCl
What is demastication?
Accelerated tooth wear from chewing on abrasive substances (atrition + abrasion)
What is abfraction?
Non-carious tooth loss along the gingival margin, so it is mechanical in nature (i.e. eccentric forces)
