Digital + Advanced Imaging Review

Which of the following is not a pro of digital radiography compared to conventional film?

a) reduced patient exposure

b) faster image acquisition

c) improved ability to detect incipient caries

d) lower initial equipment cost

d) lower initial equipment cost

The most effective way to prevent cross contamination when using digital sensors is

a) disinfect the sensor after every patient

b) use a disposable barrier cover and disinfect between patients

c) spray sensors with high level disinfectant

d) place the sensor in a heat sterilizer after each patient

b) use a disposable barrier cover and disinfect between patients

• semi critical= barriers + disinfection

Digital image resolution is primarily determined by

a) size of the focal spot in the x-ray tube

b) pixel size and sensor technology

c) kVp setting

d) use of rectangular collimation

b) pixel size and sensor technology

• sharpness depends on this

Which clinical situation is MRI most appropriate for in dentistry?

a) detecting caries in posterior teeth

b) evaluating TMJ disorders

c) assessing alveolar bone density for implant placement

d) detecting vertical root fractures

b) pixel size and sensor technology

• gold standards for imaging soft tissues

A patient with suspected osteomyelitis of the mandible requires imaging. Why is MRI often preferred?

a) superior bone density detail

b) lower cost than pano

c) better visualization of bone marrow changes and soft tissue involvement

d) lower radiation dose than CBCT

c) better visualization of bone marrow changes and soft tissue involvement

Which of the following is a primary indication for CBCT in dental hygiene practice?

a) routine caries detection in adolescents

b) evaluation of periodontal bone defects and furcations

c) assessing ortho tooth movement

d) screening for oral cancer lesions

b) evaluation of periodontal bone defects and furcations

• bone defects

A limited (small ) FOV CBCT is most appropriate for which situation?

a) evaluating a single implant site

b) assessing airway obstruction

c) full arch ortho treatment planning

d) TMJ disc position

a) evaluating a single implant site

• small FOV=higher resolution, lower dose, focused on localized region

A patient with impacted 3rd molars and proximity to the inferior alveolar canal should be imaged with

a) PANO

b) FMX
c) CBCT with medium FOV
d) MRI of the mandible

c) CBCT with medium FOV

Which of the following situation requires a large FOV CBCT?

a) evaluating endodontic morphology of a mandibular molar

b) planning for orthognathic surgery

c) assessing localized periodontal defect

d) detecting proximal caries

b) planning for orthognathic surgery

• large FOV captures both arches, maxillofacial structures, and cranial base

CBCT is preferred over MRI when

a) evaluating soft tissue pathology

b) assessing TMJ disc position

c) detecting jaw fractures

d) assessing inflammatory changes in bone marrow

b) assessing TMJ disc position

• excels at hard tissue evaluation

A common artifact seen with PSP if they are no processed promptly is

a) cone cut error

b) imaging fading or ghosting

c) motion blur

d) elongation

b) imaging fading or ghosting

• sensitive to time and light

Which of the following is not considered an appropriate use of CBCT in dental hygiene practice

a) evaluating furcation involvement in molars

b) routine caries detection in primary molars

c) assessing bone level around implants

d) evaluating root morphology for endodontic planning

b) routine caries detection in primary molars

• because of radiation exposure and limited sensitivity for incipient caries

Which of the following is a key pro of MRI over CBCT in dentistry?

a) lower cost

b) better visualization of cortical bone

c) superior visualization of soft tissue without ionizing radiation

d) faster scan times

a) lower cost???

• but is says MRI is best for soft tissues (TMJ disc, salivary glands, marrow changes) and involves no radiation

According to the ADA/FDA guidelines, advanced imaging such as CBCT should be

a) used routinely in place of BWX for caries detection

b) performed on all ortho patient as a baseline

c) reserved for cases where conventional imaging cannot provide adequate information

d) repeated annually to monitor periodontal health

c) reserved for cases where conventional imaging cannot provide adequate information

• follows ALARA and is not for routine screening