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Purpose & Technique

QuestionAnswer
What is observed on a panoramic radiograph when the patient's chin is tipped down? exaggerated smile teeth appear superimposed anterior teeth appear widened narrow smile
Blurred radiographic images are often caused by patient movement during exposure failure to remove dental appliance improper positioning of the x-ray tube head overlapping bitewing
The most radiolucent area on an anterior image is the nasal fossa nasal spine maxillary sinus maxillary tuberosity
What structure appears radiopaque on a dental radiograph? Bone air space periodontal ligament pulp tissue
Impacted third molars are best seen with what type of radiograph? Panoramix periapical bitewing cephalometric
When taking an occlusal radiograph, the PSP packet should extend from the patient's mouth by approximately 1/8-1/4 inches 1 1/8-1/4 inches 3/4-1 inches 1/2-5/8 inches
How can you stabilize the biteblock on a partially edentulous patient? use a cotton roll Have family member hold the biteblock Have patient hold the biteblock leave the partial denture in the mouth
To assist the patient in controlling the gag reflex use a distraction technique ask the dentist to anesthetize the patien expose extraoral images only ask the patient to return tomorrow
The Buccal Object Rule is used to determine if a foreign body is located in which direction? Lingual to buccal Buccal to distal Subgingival to supragingival occlusal to apical
If a patient does not remove earrings before a panoramic radiograph is exposed, the image may have Ghost image double images radiolucent images magnified images
Most bilateral findings in images are considered normal anatomic landmarks suspect of a lesion primarily seen in bitewing views Most often seen on panoramic views
If a patient's chin is positioned too high during a panoramic image, how will the image appear? the image will appear flat or a "reverses smile" anterior teeth will appear wide anterior teeth will appear thin the image will appear as an exaggerated smile
The primary purpose of the bitewing image is to evaluate interproximal decay crowns and apices tooth formation and eruption root surface decay
Foreshortening of the maxillary radiographic image results from increased vertical angulation decreased vertical angulation increased horizontal angulation decreased horizontal angulation
The most common reason for taking bitewing radiographs is to evaluate Interproximal caries calculus incipient caries occlusal caries
The edentulous radiographic series may include all the following EXCEPT Bitewings occlusals periapicals panoramic
How is scatter radiation reduced when taking an image? use of rectangular cone use of round cone Use of short cone use of receptor holder
Which device is a disposable intraoral PSP holder? Stabe Endoray Rinn XCP Eezee grip
Which term is used to describe abscess or pulp area on a radiograph? Radiolucent Contrast density radiopaque
What influences the sharpness of a radiograph? Focal spot size kVp and mA Object-receptor alignment X-ray beam angulation
What results in a double image on a PSP radiograph? Exposing the same PSP twice Processing two exposed plates together Processing two unexposed plates together Exposing sensor twice
What is the most common radiographic exposure used to detect periodontal disease? Bitewing Periapical Occlusal Panoramic
A radiograph will automatically be retaken when there is double exposure cone cut bent plate scratched plate
Supernumerary teeth are best detected using what type of image receptor? panoramic periapical cephalometric bitewing
Which anatomical landmark is NOT normally seen on intraoral radiographs? Frontal sinus Maxillary sinuses Nutrient canals Mandibular canals
What is the primary function of collimation? restrict the size of the beam increase target-receptor distance eliminate cone cuts decrease targe-receptor distance
To reduce patient anxiety about radiographic exposure, take time to explain the procedure use intra-oral photography rapidly complete the procedure only take panoramic images
When placed vertically in the anterior region of the mouth, what size image receptor is most effective for evaluating caries and periodontal health? 2 3 4 0
Which describes a double-ended PSP holder used for posterior and anterior teeth? Eezee-Grip Stabe Precision holder EndoRay
A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be caused by the patient Not placing the tongue against the palate placing the tongue against the palate not appropriately positioned in the focal trough not biting on the bite block correctly
When documenting a lesion found on an image, the description should include severity appearance location size
If a patient's gag reflex is stimulated during the radiographic procedure, apply distraction techniques to divert his or her attention tell the patient it is all in his or her mind ask the patient if he or she is a gagger avoid small talk to help him or her relax
What error occurs when the vertical angulation is incorrect? Elongation Cone cut blurred image overlapping
To desensitize the tissue prior to image receptor placement, rub a finger along the tissues where the receptor touches expose the most anterior image first place the receptor in dental assistant mouth to demonstrate touch the palate with the receptor
On a computer template for an image, what is automatically labeled? Date of image Dentist name Dental assistant name patient address
When placing periapical images in a template, what information helps to distinguish maxillary molar images from mandibular molar images? the maxillary sinus outline is visible the mandibular second molar has one root the mandibular molars are larger the maxillary molars have two roots
What is the disadvantage of using panoramic radiographs? Higher cost of equipment lower cost of equipment less radiation exposure more radiation exposure
Which image would be used to see the relationship of the alveolar bone? Vertical bitewing Periapical Occlusal horizontal bitewing
Phosphor plates are processed by using laser beam technology cone-beam computed tomography digital sensor technology chemical solutions
What causes elongation? incorrect vertical angulation incorrect horizontal angulation incorrect exposure settings incorrect size of image receptor
What can cause a radiopaque artifact on a radiograph? Metallic partial denture soft tissue surrounding the bone provisional restoration soft tissues of the buccal mucosa
The BEST radiograph to evaluate a suspected salivary stone in the submandibular gland is a/an occlusal periapical panoramic cephalometric
Before exposing dental radiographs on a visually impaired patient, use touch to explain the equipment and procedure set the exposure time to increase radiation set the exposure time to decrease radiation ask the caregiver to stabilize the image receptor
When exposing a posterior periapical radiograph on an adult patient with no intraoral restrictions, which size image receptor should be used? 2 1 3 4
What causes elongation on a radiograph? insufficient vertical angulation insufficient horizontal angulation excessive horizontal angulation excessive vertical angulation
The use of a thyroid collar is recommended for all of the following radiographic exposures EXCEPT panoramic occlusal bitewing periapical
During which type of radiographic exposure should a patient wear a thyroid collar? Intraoral radipgraph extraoral radiograph cephalometric radiograph panoramic radiograph
When taking a panoramic radiograph, the patient's head should be oriented with the midsagittal plane perpendicular to the floor so that it is rotated toward the image receptor with the chin tipped up with the chin projected forward
An underexposed image will appear light dark spotty grainy
The median palatal suture is visible on which images? Maxillary anterior periapical Maxillary posterior periapical mandibular posterior periapical mandibular anterior periapical
Compared to a dentulous patient, radiographic exposure time on an edentulous adult patient should decrease be doubled remain unchanged increase
The best way to correct a cone cutting error is to adjust PID/cone position vertical angulations horizontal angulation patient positioning
What causes the interproximal areas of the teeth to appear overlapped? Improper horizontal angulation improper vertical angulation patient with shallow palate patient talking during exposure
Which digital image receptor is the longest? 2 1 3 0
Paralleling technique requires the image receptor be placed away from the tooth, toward the middle of the oral cavity against the occlusal surface of the tooth toward the tooth, away from the oral cavity against the lingual surface of the tooth
What are common uses for a CBCT 3D image? determining bone structure and tooth orientation determining decay in teeth determining periodontal disease identifying an apical abscess
Which size image receptor is used for an adult posterior periapical film? 2 0 1 4
What is used to stabilize the upper and lower arch on the bite block when taking a panoramic image? cotton rolls separators chin rests Head positioners
The dense radiopaque band that outlines the edge of a mandibular image is the Inferior border mental protuberance oblique ridge mylohyoid ridge
What radiographic technique is recommended for a patient with a shallow palate? bisecting occlusal periapical paralleling
Which landmark is located by the midline of the mandible? genial tubercles mental foramen mandibular canal mandibular foramen
The most common radiographic exposure used to evaluate a dental implant on an adult is periapical occlusal panoramic bitewing
On an anterior image, the anterior alveolar crest normally appears pointed and sharp flat and smooth as a dense radiopaque line as a triangular-shaped radiopacity
The most commonly used radiographic exposure for a 3-year-old patient is a bitewing cephalometric panoramic periapical
The amount of radiation and exposure time needed to produce a diagnostic radiograph is best determined by exposure time kVp mA image receptor size
Why is it important for the patient to stand up straight when taking a panoramic image? to prevent the spine from being superimposed over the anterior teeth to prevent the anterior teeth from being wide and blurry to prevent anterior teeth from appearing thin and overlapped to prevent a double image
To view an abscess on tooth #25, the best radiographic exposure is a/an periapical panoramic occlusal bitewing
On a full mouth series with eighteen images, how many anterior images are exposed? 6 5 8 7
Compared to radiopaque structures, radiolucent structures appear dark on a image absorb more radiation are dense appear light on a radiograph
What does Cone beam computed tomography use? three-dimensional technology customized image holders panoramic cassettes two-dimensional
When the contact area of one tooth is superimposed over the contact of another on a radiograph, it is called overlapping foreshortening cone cutting elongation
Processed PSP plates should be handled by the edges to prevent scratches discoloration cone cuts contamination
When using a 16-inch PID instead of an 8-inch PID, the exposure time must be increased remain the same be decreased
The Frankfort Plane is an imaginary plane passing through the external auditory meatus to the floor of the orbit external auditory meatus to the outer canthus of the eye ala of the nose to the bottom of the ear ala of the nose to tragus of the ear
How do most carious lesions appear on an image? radiolucent radiopaque mixed density undetectable
What is the most common area in the oral cavity for a dentigerous cyst? around the third molars around the canines between the premolars between the central incisors
A full mouth series of periapical images taken on an edentulous patient will consist of six anterior and eight posterior two anterior and four posterior six anterior and four posterior two anterior and eight posterior
Which exposure is used to diagnose interproximal caries? bitewing periapical cephalometric panoramic
Which radiolucency may be mistaken for caries? cervical burnout gingivitis anatomic configurations calculus
A cephalometric radiograph is PRIMARILY used to evaluate lateral jaw development periodontal disease implant placement temporal mandibular join
Which extraoral radiograph is used to evaluate impacted teeth, large lesions and fractures of the mandible? lateral jaw projection waters projection reverse towne projection posteroanterior projection
Which condition may mimic caries on an intraoral image? root resorption secondary dentin formation pulp stones residual cyst of the mandible
Which landmark is seen in a maxillary anterior periapical image? incisive foramen mental foramen zygomatic process genial tubercule
Why would the occlusal plane appear diagonal in a radiograph? incorrect placement of image receptor poor horizontal angulation incorrect vertical angulation bent corner of PSP plant
Dilaceration in a radiographic image indicates the root shape is abnormally bent or curved vertical angulation needs to be increased image receptor was over-bent during placement vertical angulation needs to be decreased
Created by: Chairside
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