Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Ch 41
Intraoral Radiography
| Question | Answer |
|---|---|
| Alignment of central ray of x-ray beam in horizontal and vertical planes | angulation |
| intraoral technique of exposing periapical films | bisecting technique |
| type of radiograph used in the interprosimal examination | bitewing |
| x-ray at the center beam | central ray |
| area of the mesial or distal surfaces of a tooth that touches adjacent tooth in the same arch | contact area |
| coronal portion of alveolar bone found between the teeth | crestal bone |
| impairment of mental or physical functioning that usually occurs before adulthood and lasts indefinitely | developmental disability |
| referring to radiographs with the proper images and necessary density,contrast, definition,and detail for diagnostic purposes | diagnostic quality |
| between two adjacent surfaces | interproximal |
| cuting across or through | intersecting |
| imaginary line dividing the tooth longitudinally(vertically) into two equal halves | loong axis of the tooth |
| used to examine large areas of teh upper or lower jaw | occlusal technique |
| moving or lying in the same plane, always separated by the same distance | parallel |
| intraoral technique of exposing periapical and bitewing radiographs | paralleling technique |
| intersecting at or forming a right angle | perpendicular |
| impairment in certain functions(s) of the body, such as vision, hearing or mobility | physical disability |
| angle of 90 degrees formed by two lines perpendicular to each other | right angle |
| even the most skilled operators can do what | make errors |
| the ability to recognize errors and to know the steps to take to prevent their recurrence is what | most important |
| what is the abreviation for an intraoral full mouth survey | FMX |
| a full mouth survey contains which type of radiographs | both periapical and bitewing |
| the _radiograph shows the upper and lower teeth in occlusion, only the crowns and a small portion of the root are seen. | bitewing |
| the bitewing radiograph is used for: | detecting interproximal decay, periodontal disease, recurrent decay under restorations and the fit of metallic fillings or crowns |
| The _____ radiograph shows the entire tooth from occlusal surface or incisal edge to about 2 to 3 mm beyond the apex to show the periapical bone. | periapical |
| the periapical radiograph is used to: | diagnose pathologic conditions of the tooth,root and bone as well as tooth formation and eruption |
| For the average adult a FMX consists of how many films | generally 18-20 |
| when taking a FMX which area is the region in which the number of films usually varies | anterior area |
| when taking a FMX in the anterior region and you are using the bisecting technique which size of film would you use and how many would you take | 3, on each arch size # 2 |
| when taking a FMX in the anterior region and you are using the paralleling technique which size of film would you use and how many would you take | 3 -4 on each arch size # 1 |
| what are the two basic techniques for obtaining periapical x-rays | paralleling and bisecting techniques |
| Why is the paralleling technique recommended over the bisecting technique | becuuse it provides the most accurate image with the least amount of radiation exposure to the patient |
| in which situations would the operator need to use the bisecting technique over the paralleling technique | if the pt has a small mouth, shallow palate, tori |
| the paralleling technique is also known as what | extension cone paralleling ( XCP) right angle or long cone technique |
| what are the 5 basic rules to following when using the paralleling technique | film placement, film position, vertical angulation,horizontal angulation and central ray |
| when using the paralleling technique how must the film be positioned | parallel to the long axis of the tooth. |
| when using the paralleling technique how must the film holder be placed | away from the teeth and toward the middle of the mouth |
| when using the paralleling technique what does it mean when we are talking about vertical angulation | the central ray of teh x-ray beam must be directed perpendicular ( right angles ) to the film and the long axis of the tooth |
| what does it mean when we are talking about horizontal angulation when using the paralleling technique | the central ray of the x-ray beam must be directed through the contact areas between the teeth |
| failure to center the central ray on the film will result in what | partail image or cone cut |
| when exposing periapical films with teh paralleling technique where does the book say you should always start | with the anterior teeth |
| why does the book say you should start with anterior teeth | the film size # 1 is small and is easier for patients to tolerate,patients adapt more easily to the anterior film holder,less likely to gag |
| what color is the anterior XCP ring/rod system | blue |
| what color is the posterior XCP ring/rod system | Yellow |
| what color is the bitewing XCP rint/rod system | RED |
| the bisecting technique is based on what principle | the geometric principle of equally dividing a triangle |
| where should you uplace the film when using the bisecting technique | directly against the teeth to be radiographed |
| whith the bisecting technique the angle formed by the ____ and the __________ is bisected into two equal parts | long axes of the teeth , film |
| when bisecting where is the xrya beam directed | perpendicular to the bisecting line |
| what is the major disadvantage of the bisecting technique | images on the film are dimensionally distored |
| when using the bisecting technique what should you never do | have the patient hold the film in their mouth with their finger |
| what types of film holders can you use for bisecting | the BAI, the Stabe bite block, the EeZee grip formerly known as the snap a ray |
| in the bisecting technique what is critical | the angulation of the PID |
| how can angulation be changed | by moving the PID in a horizontal or vertical direction |
| what does incorrect horizontal angulation result in | overlapped contact areas |
| incorrect vertical angulation results in what | image that is not the same length as the tooth that is being xrayed. the image appears longer or shorter ( elongated or foreshortened ) |
| which technique is always used for bitewing radiographs | paralleling |
| how is the # of bitewing films to take determined | based on the curvature of the arch and the number of teeth present in the posterior areas |
| which is to be included in the premolar bitewing radiograph | distal half of the crowns of the canines, both premolars and often the first molars on both maxillary and manibular arches |
| when exposing a molar bitewing radiograph where should the film be centered | over the second molars |
| the occlusal technique is named this because | the patient bites or cooludes the entire film |
| when exposing a maxillary occlusal film where does the white side of the film go | toward the occlusal/incisal edges |
| when exposing a maxillary occlusal film how is the PID directed | at +65 degrees through the center of the film |
| when exposing a maxillary occlusal film where is the PID placed in relation to the patients face | between the eyebrows on the bridge of the nose |
| when exposing a mandibular occlusal film how is the PID directed | at 90 degree angle to the center of the film packet, should be centered about 1 inch below the chin |
| what does edentulous mean | with out teeth |
| For paritally edentulous patients, film holding instruments can be used by doing what | placing a cotton roll on the bite block where the crowns of the missing teeth would have been |
| what size of film is recommended for use in pediatric patients | 0 |
| which film placement is the one most likely to cause the gag reflex | maxillary molar |
| in some extreme cases where the patient has an uncontrollable gag reflex what can you do to obtain radiographs | use extraoral radiographs such as a panoramic or lateral jaw films |
| processed radiographs must be arranged in what order | anatomic |
| what information must always be on the film mounts | patients name, date of exposure, dentists name and address ( if room ) |
| which two methods can be used when mounting radiographs | labial mounting method and mounting with the raised dots facing down |
| in the labial methond the films are placed in the mount with the raised dots facing which way | up ( toward you ) |
| In the labial mounting method the radiographs are viewed as if the viewere is looking: | directly at the patient so the patients left side is on the viewers right side |
Created by:
cynthia.fryer
Popular Dentistry sets