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What is intraoral radiographic examination?
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What does intraoral radiographic examination utilize?
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Dental Radiography I
| Question | Answer |
|---|---|
| What is intraoral radiographic examination? | Production of radiographs for the purpose of inspecting the teeth and adjacent anatomical structures; |
| What does intraoral radiographic examination utilize? | It utilizes intraoral image receptors: film, sensors, plate |
| What are the 3 types of the intraoral radiographic examination? | Periapical examination, interproximal examination, occlusal examination; |
| Periapical radiographic examination. What does "periapical" mean? | Captures the image of the entire tooth (including crown and root(s)) and the surrounding bone; |
| What is captured in interproximal examination? | Interproximal examination captures images of the crowns of the maxillary and mandibular teeth in occlusion; |
| Radiographs taken in interproximal examination are named | Bitewings |
| Production of radiographs for the purpose of inspecting the teeth and the adjacent anatomical structures; | Intraoral Radiographic Examination |
| Occlusal examination | provides a broad view of several teeth on the maxilla or mandible; |
| Occlusal examination used for: | Screening; presence and position of permanent teeth; |
| Receptor size used for occlusal examination? | Adult - 4; child - size 2 |
| Complete Mouth Radiographic Series, Define | Series of intraoral radiographs that capture images of all of the teeth and the surrounding structures of the mandible and maxilla; |
| How many radiographs in a Complete Mouth Series | 14-20; includes edentulous and dentulous areas |
| VTC Complete Mouth Survey includes what teeth | Incisors, Canines, Premolars, Molar and Posterior Bitewings |
| Types of Paralleling Technique; Name Variations | (XCP) Extension Cone Paralleling technique, long-cone technique, right-angle technique |
| Long-cone technique | Target (tungsten target in the tubehead) to receptor distance is increased, resulting in increased definition and less image magnification; |
| Paralleling technique. Definition. | Intraoral Radiographic Technique in which the receptor is placed parallel to the long axis of the tooth and the central ray is directed perpendicular to the tooth and receptor; |
| Intraoral radiographic technique, in which the receptor is placed parallel to the long axis of the tooth and the central ray is directed perpendicular to the tooth and receptor; | Definition of paralleling technique |
| Parallel, define | moving or lying in the same plane |
| Perpendicular, define | Intersecting lines that form the right angle; |
| Principles of the paralleling technique | *Based on theconcept of prlllsm *Receptor is plcd inthe mouth prllel tothe long axis ofthe tooth*Central ray ofthe x-ray beamis directed perpndclr tothe long axis ofthe tooth andthe receptor*Areceptor holder mustbe used toholdthe film/plate/sensor inplace |
| In paralleling technique receptor must be positioned ... the tooth | away from the tooth; Increased object-receptor distance; |
| Advantages of the paralleling technique | *Forms an image on the receptor w/linear & dimensional accuracy (poss to diagnose & eval caries & height of alveolar bone on all radiographs, not just BW) *Low vertical agnulation (+/- 10 degr) reduces radiation exposure to the thyroid gland & lens of eye |
| Disadvantages of the paralleling technique | some difficulty in placement & increased discomfort for the patient caused by the devices (XCPs) used to hold the receptor parallel to the long axis of the tooth; devices are bulky; |
| Anterior XCP & Posterior XCP include what parts? | Bite block, aiming ring, metal indicator arm |
| Other receptor holding devices | Stabe (styrofoam bite block); Snap-A-Ray |
| Styrofoam bite block known as | Stabe |
| Paralleling technique when taking the X-Ray on the maxilla | Occlusal plane parallel with the floor; *Ala-tragus line parallel w/the floor |
| Paralleling technique when taking the X-Ray of the mandible | occlusal plane parallel w/the floor |
| Horizontal angulation of the X-Ray unit controlled by... | moving the Yoke Horizontal angulation, "side-to-side" |
| Vertical angulation of the X-Ray unit controlled by | moving the tubehead vertical angulation "up and down" |
| Cone (PID) Positioning Errors | *Overlapping; *Elongation; *Foreshortening; Cone cutting; * Absence of apical structures; *Dropped receptor corner; |
| Cone (PID) Positioning Errors, Overlapping; WHY, HOW TO AVOID | *Horizontal angulation error; A cotton-tip applicator must be used to open the contacts between the guide teeth; |
| Cone (PID) Positioning Errors, Elongation; WHY, HOW TO AVOID | *Vertical angulation error: vertical angulation is too flat; corrected by increasing the vertical angulation |
| Cone (PID) Positioning Errors, Foreshortening; WHY, HOW TO AVOID | *Vertical angulation error: vertical angulation is to steep; Corrected by decreasing the vertical angulation; |
| Cone (PID) Positioning Errors, Cone cutting; WHY, HOW TO AVOID | *Avoid cone cutting by covering the entire receptor with cone positioning; * The portion of the receptor that is not exposed to x-radiation appears white after receptor processing; *The border can be well-defined or fuzzy; |
| Cone (PID) Positioning Errors, Absence of apical structures; WHY, HOW TO AVOID | Correction: Make sure the pt is biting down on the bite block; Make sure that no more than an 1/8 inch of the receptor extends beyond the occlusal/incisal edges of the teeth; |
| Cone (PID) Positioning Errors, Dropped receptor corner; WHY, HOW TO AVOID | Dropped receptor corner "Uphill/downhill"; Edge of the receptor not placed parallel to the occlusal/ incisal tooth surfaces; film was placed crooked in the mouth |
| Periapical image of the mandibular premolar, Paralleling technique | Sensitive area, have the pt lift their tongue, tip the receptor away from the tongue; |
| Radiodense | the degree of darkness of an exposed receptor; reference is to the entire receptor |
| Radiolucent | The portion of an exposed receptor that appears dark; *allows more x-rays to reach the receptor: little attenuation (истощение, ослабление, weakening) of the X-ray beam; The less dense the structure -the more radiolucent it is. (Periodontal ligament, etc) |
| Radiopaque | the portion of the exposed receptor that appears light; Dense materials/objects limit the amount of x-rays that reach the receptor: high attenuation (истощение, ослабление, weakening) of the x-ray beam; |
Created by:
EdmondDantes