Term
| What is the Bisecting Technique? |
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Definition
-Additional method used for periapical Radiographs
-Paralleling technique is the mot hod preferred |
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Term
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Definition
| formed by 2 lines, diverging form a common point |
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Term
| what does it mean to Bisect ? |
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Definition
| To divide equally into 2 parts |
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Term
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Definition
| 3 straight line segments connected at 3 points, 3 angles |
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Term
| what is an Equilateral Triangle? |
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Definition
| Triangle with 3 equal sides |
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Term
| what is a right Triangle? |
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Definition
| triangle with one 90 degree angle |
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Term
| what is a Congruent Triangle? |
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Definition
| Triangles that are identical |
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Term
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Definition
| -(right triangle) SIDE opposite the right angle |
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Term
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Definition
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Term
| what is the Long axis of the tooth? |
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Definition
| Division of the tooth longitudinally into 2 equal parts |
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Term
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Definition
| Central portion of primary beam |
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Term
| what is the RULE of Isometry? |
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Definition
| 2 triangles are equal if they have two equal angles and share a common side. |
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Term
| what are the 5 steps to preform in the Bisecting Technique? |
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Definition
1. Receptor placed along lingual surface near tooth
2. Plane of receptor and long axis of tooth form an angle at the point where the receptor contacts the tooth.
3. Imaginary bisector bisects the angle formed by receptor and long axis of the tooth
4. Central ray is directed perpendicular to the imadinary bisector
5. Resulting in 2 imaginary triangles that are right triangles and congruent |
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Term
| what film holders could you use during a bisecting technique? |
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Definition
-Eliminates need for the patient to stabilize the receptor
-EEZEE-Grip (Snap a ray)
-Bite block (position next to tooth) |
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Term
| what is the Finger Holding Method? |
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Definition
-Patient's Finger is used to stabilize the receptor
- NOT recommended (ALARA)
- Do NOT use this method at GPC |
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Term
| What size film would you use for bisecting? |
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Definition
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Term
| How will you position the film for an Anterior Periapical using Bisecting technique ? |
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Definition
Use vertical position of receptor.
Maxillary K9/ Lateral 1 image unlike paralleling technique |
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Term
| how would you position for a posterior Periapical with Bisecting Technique? |
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Definition
| - Horizontal position of redeptor |
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Term
| What is the Angulation of PID? |
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Definition
| The alignment of the central ray of the x-ray beam in the horizontal and Vertical planes |
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Term
| What is the Correct Horizontal Angulation for Bisecting Technique? |
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Definition
| CR directed perpendicular to the curvature of the arch and thru contact areas of teeth. |
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Term
| what is the incorrect horizontal angulation with bisecting technique? |
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Definition
| overlapped contact areas. |
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Term
| what is the correct vertical Angulation for bisecting technique? |
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Definition
CR directed perpendicular to the imaginary bisector.
Radiographic image close to tooth size. |
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Term
| what is incorrect vertical angulation with Bisecting technique? |
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Definition
| Extensive vertical or insufficient vertical |
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Term
| what will an insufficient vertical result in with Bisecting Technique? |
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Definition
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Term
| what will Extensive Vertical angulation result in with a bisecting Technique? |
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Definition
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Term
| what is the main positioning difference between Bisecting and Parallel technique? |
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Definition
Bisecting technique- the sensor is placed as close as possible to the tooth.
Parallel technique- the sensor is placed further away from the tooth to get a more parallel lines with the teeth and sensor. |
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Term
| What are the Advantages of the Bisecting Technique? |
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Definition
-Receptor tests next to tooth
- Placement is more comfortable for patient
-Good for shallow palate |
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Term
| what are the Disadvantages of the Bisecting Technique? |
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Definition
-Image Distortion
-Angulation problems
-Technique difficult to master resulting in unnecessary retakes. |
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Term
| What are the general Angulation numbers for the Maxillary K9s, incisors, Premolars, & Molars? |
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Definition
k9- +45 to +55
Incisors- +40 to +50
Premolars- +30 to +40
Molars- +20 to +30 |
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Term
| What are the general Angulation numbers for the Mandibular K9s, incisors, Premolars, & Molars? |
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Definition
K9: -20 to -30
Incisors: -15 to -25
Premolars: -10 to -15
Molars: -5 to 0 |
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