Implant radiology Flashcards
Radiographic Information
- Depth of bone
- Width of bone
- Quality of bone
- Angulation of bone
- Location of vital structures
vital strucutres to locate on radio
- Nasal fossa
- Maxillary sinus
- Inferior alveolar canal
- incisive canal
IMAGING MODALITIES
- Intraoral Radiography
- Panoramic Radiography
- Computed Tomography
- Cone Beam Computed Tomography
optimal technique for intraoral
paralleling technique with long cone to provide most accurate image
magnification
long cone technique will reduce this effect
benefits and con of intraoral
pros: good spatial resolution, easy, low dose
cons: low FOV
pano focal trough
want arch in this space to optmize image properties, specifically in the central plane
placing a posterior implant on the max R side may have what issue?
sinus is pneumatized, would need lift
pano cons
Unsharpness, Shape Distortion, Magnification all occur outside focal trough
2D image
lower spatial resolution
benefits of pano
FOV, fairly accessable, less cost than CBCT
benefits of pano
FOV, fairly accessable, less cost than CBCT
how could magnification of pano be determined if unkwn
bb technique
issue with pano beam and strucutres within bone
example?
beam is angled so strucutures in bone may app in different vertical location based on B/L location of them
COMPUTED TOMOGRAPHY
- Rotational movement of beam and detector
- Sequential axial slices
- Computer manipulation of data
- Multiplanar reformatting
CT pros
- No superimposition of structures
- Image acquisition in multiple planes
- Hard-tissue and soft-tissue imaging
- Digital image enhancement
CT slices
can look through slices of structures, typically in increments such as 1mm
CBCT
Cone shaped beam
One flat panel sensor
lower cost and dose compared to medical CT
Advantages/Disadvantages over
Medical CT
Less radiation
Lower cost
Image Noise
Poor soft-tissue contrast
Fixed imaging volume
why does CBCT have lower soft tissue contrast
More scatter radiation=Poor soft-tissue contrast
implant radio modality for inital exam
Pano and PA of interest
implant radio modality for preop
CBCT
implant radio modality for intraop
PA
implant radio modality for postop follow ups
pano with multiple implants placed
asymptomatic: PA
symptomatic: CBCT
how can CT slices be useful for planning
can examine state of the ridge, width and undercuts
what modality can be used to evaluate a sinus lift or bone graft
CBCT
INTERACTIVE SOFTWARE PROGRAMS
IMAGE-GUIDED APPLICATIONS
angle and distance measurement
benefits of cross-sectional imaging
can examine state of ridge you want to place implant in.
