Radiologic Study Flashcards
The radiologic projections indicated for the orthodontic diagnosis are divided into two categories:
Intraoral
Periapical
Occlusal
We can see:
the degree of apical formation
shape, number and size of roots
agenesis
supernumerary
Periapical
We can see:
location of impacted tooth
extension and shape of fissure
control of disjunctions
Occlusal
In case of suspicion of pathological processes detected in the panoramic, we get an a
Periapical
In the intraorals we can see:
chronology of the eruption
the degree of apical formation
shape, number and size of roots
agenesis
supernumerary
presence, position of third molars
presence or retained teeth
Extraoral
Lateral
Panoramic
Carpal
Postero-anterior
Cone beam CT
Dental casts
We can see in Extraoral:
skull and face growth
direction of growth according to age
clinical diagnosis of anomalies
comparison of changes caused:
due to treatment with appliances
patients growth
evaluation of results
In this X-ray we analyzed:
craniofacial anatomy
relationship between the jaws
relationship of the axes of the incisors
assessment of profile morphology (soft tissues)
growth trend and direction
possibilities and limitations of tx
Lateral
The cephalometric analysis is obtained from the _ x ray
Lateral
The cephalometric analysis will be composed by the __ and the set of ___ and ___
anatomical drawing and the set of linear and angular measurements
It’s interpretation
Two basic elements from the cephalometric analysis
Anatomical drawing
Orientation drawings
Madre through the union of the points located previously and composed of lines and planes that define various cephalometric magnitudes
Orientation drawings
Soft profile
Dental structures
Bone structure
Anatomic drawings
Line planes
Linear and angular magnitudes
Orientation trace
In this X-ray We can see:
chronology of the eruption
eruptive trajectory
agenesis, supernumerary
TMJ(ATM) morphology
ramify morphology
different types of pathologies
fracture lines
Panoramic
it is most used dx method to determine the level of bone maturation
Carpal x ray
How can we get the level of bone maturation?
In the carpal x ray
used to evaluate the patient’s bone age and establish a relationship with their chronological age in order to determine the level of development and maturation
the ossification of the sesamoid bone of the thumb - it coincides with the beginning of the
Pubertal outbreak
And is ideal for the beginning of ortho tx
The ossification of which bone, and where is it, determines the beginning of the ortho tx
Sesamoid bone
In the thumb
When do we indicate a carpal x ray
in px who show a severe discrepancy between dental age and chronological age
determination of the state of skeletal maturity before performing ortho tx
predict the onset of pubertal growth
px between 16 and 20 yo who need ortho surgery
it allows the assessment of asymmetries of the skull, face and jaws as well as the frontal position of the dental organs
Postero-anterior
The postero-anterior X-ray is indicated for:
- dx for latero-deviations / laterognathia
- severe midline deviation
- dx of mal positions that affect different structures
- studies the transverse anomalies
it is a technology that provides high-resolution images of the craniofacial complex in three dimensions (3D). This vision goes with the movements made to correct malocclusion or facial asymmetries
CBCT
Cone beam
CT has led ortho to change their dx imaging, including possible changes in ortho
they are precise reproductions of the teeth and their surrounding soft tissues
Dental cast
measurements of discrepancies are made between the dental arches and basal arches to obtain degrees of crowding,
…
The duty models (dental casts) allow us to observe:
Anomalies in shape and size and number of dental organs.
Diastemas.
Insertion of the braces.
Midline discrepancy.
Anterior or posterior crossbite.
Openbite.
Curve of Spee.
Morphology of interdental papillae.
Shape and height of the palate.
Helps in measuring arch length, and tooth size.
arch width
arch length
analysis of available space
overjet and overbite
molar and canine relationship
Dental cast
They allow the study of occlusion from all aspects
See the progress of the tx
See the evaluation and study of the severity of malocclusion
Dental cast
It allows the px to compare before and after the treatment
Dental cast
