2019 Bellei, clinical radiographic study of unerupted teeth in dogs and cats 73 cases Flashcards
Frontier - M Gracis
Give reason of unerupted tooth that does not emerge within expected time frame
Lack of space
Fibrous tissue - impacted tooth
lack of eruption force - embedded tooth
What was the main purpose of this retrospective study?
Describe canine and feline with unerupted teeth and assess the prevalence of dentigerous cysts and tumors
Possible factors in cystic development
Radiographic and histological features were defined and compared
Which tooth is the most affected in dogs ?
Permanent 1st Premolar in
canine teeth
What is the inclination ?
It measures as an angle between the long axis of the tooth and the occlusal plane
What is classification system by Winter?
A score to describe the difficulty of impacted molar extraction in humans
Winter classification system
Vertical
Mesioangular,
Horizontal
Distoangular
Transverse
Inverted
Most common dog breed that has unerupted tooth ?
Boxer 28.9%
Main clinical complain
78 % incidental findings of unerupted tooth
10.9% swelling /mass at or close to unerupted tooth
9.6% missing tooth
Which teeth were unerupted in the dog - o
o 78.7% 1st premolar tooth
o 7.4% canine teeth
o 7.4 % mandibular 3rd premolar tooth
o 4.6% mandibular incisor teeth
o 0.9% mandibular 2nd molar tooth
o 0.9% maxillary 4th Premolar tooth
42% had multiple unerupted teeth
Most common cause for 1st premolar missing in dog?
lack of eruption
How many % of dentigerous cysts were diagnosed in dogs with unerupted teeth ?
44.4% of unerupted teeth a dentigerous cysts was diagnosed in dogs
How many cysts were diagnosed in brachycephalic breeds?
77.3%
Boxer , Pug, Maltese, Shi Tzu
how many cysts were diagnosed in non brachycephalic breeds
22.7% - Lab retriever most common
Which type is more prone for cysts associated with unerupted teeth brachycephalic or non brachycephalic ?
brachycephalic 77.3%
Non brachycephalic 22.7%
most common breed that has unerupted teeth with DTC
Boxer 90%, 33.3 Labrador retriever
How many intact male dogs have DTC ?
60.4%
which gender has the most DTC
intact male dogs 60.4% , 16.7% spayed female dogs
what is the depth of inclusion of unerupted teeth in dogs ?
23.6& of unerupted teeth were in complete bone inclusion
76.4% unerupted teeth were in soft tissue inclusion
what was the most common inclination angle according to Winter system in cats ?
vertical inclination
What is the inclinations angle in dogs of unerupted teeth according to Winter system?
39.8% Horizontal position
What is the least inclination angle of unerupted tooth in the dog
mesioangular position 0.9%
Define tooth eruption
axial movement of the tooth from nonfunctional in the bone to functional position
What is REE ?
reduced enamel epithelium
Explain role of REE in tooth eruption
REE covers the developing tooth - fuses with gingiva during the process . REE produces proteases that break down connective tissue , decreases tissue resistance
What is the role of dental follicle in tooth eruption?
o Dental follicle by modulating bone remodeling- produces growth factors that promote differentiation of monocytes into osteoclast to create a path to eruption
tooth eruption fails because of 2 mechanism
mechanical obstruction - physical barrier
impaired eruption mechanism - e.g. dysfunction REE
which dog type and breed was over presented and %?
Brachycephalic - breed 57.9%
Boxer 28.9% of all canines in this study
How many of the Boxer developed DTC in unerupted teeth
78%
What is a non succedaneous teeth ?
permanent molars that are not succeeded by primary dentition
The majority of unerupted teeth were found in maxillary or mandible and %?
mandible 91%
which was the most common unerupted tooth associated with cystic development in the dog ?
mandibular 1st PM
