Radiography for Dental Implant Flashcards
Radiographic information to look for on implants
(5)
- Depth of bone
- Width of bone
- Quality of bone
- Angulation of bone
- Location of vital structures
Vital structures to avoid when placing an implant (make sure you avoid them by viewing the radiograph)
(4)
- Nasal fossa
- Maxillary sinus
- Inferior alveolar canal
+ Nasopalatine canal
Imaging modalities used for implants
(4)
- Intraoral Radiography
- Panoramic Radiography
- Computed Tomography
- Cone Beam Computed Tomography
What technique is recommended to use when radiographing implants
long cone, paralleling technique
maginification=
source to film distance/ source to object distance
When taking a pano where do we want the tooth bearing areas of the jaws?
in the focal trough (area of sharpness)
What are the disadvantages of a pano?
(3)
Unsharpness
Shape distortion
Magnification
What are the advantages of a pano?
- larger field of view than intraoral radiography
- fairly accessible
- less expensive than Cone Beam
What are the characteristics of computed tomography?
(4)
- Rotational movement of beam and detector
- Sequential axial slices
- Computer manipulation of data
- Multiplanar reformatting
What are the advantages of computed tomography?
(4)
- No superimposition of structures
- Image acquisition in multiple planes
- Hard-tissue and soft-tissue imaging (better than cone beam bc soft-tissue is way better in computed tomography)
- Digital image enhancement
What are the disadvantages of computed tomography?
- more expensive than pano and cone beam
- more radiation exposure
What is a cone beam CT
(2)
- Cone shaped beam
- One flat panel sensor
What are the advantages of CBCT when compared to medical CT (computed tomography)?
- Less radiation
- Lower cost
What are the disadvantages of CBCT when compared to medical CT (computed tomography)?
- Image Noise
- Poor soft-tissue contrast (not much of a problem for dentistry)
- Fixed imaging volume
What are the different “times” you take radiographs for an implant?
- intial exam
- preoperative
- postoperative
What radiograph modality do we use for inital exams?
- pano
- supplemental PAs in the area of interest
What radiograph modality do we use for preoperative exams?
- cone beam CT (if needed)
What radiograph modality do we use for postoperative exams?
- if asymptomatic then do intraoral radiographs
- if symptomatic then a cone beam CT
- if bone graft then do a cone beam before and after the graft
- if multiple implants then a pano
What radiograph modality is used if you need to take radiographs intraoperatively?
intraoral radiographs
What do interactive software programs and image-guided applications allow?
- allows for making measurements
- place different size implants on top of the radiograph to do implant planning
- can make customized surgical guides
What are the benefits of cross-sectional imaging?
- shows more views of structures so you can know exactly what you are working with
- some views show favorable bone for implants while other views show “hidden” undercuts or other bone issues
