1 / 13

Paralleling Technique – Part 2 Film Sizes and Rules

Paralleling Technique – Part 2 Film Sizes and Rules . Resource Reading: Chapter 17 – pp. 158 – end of chapter. Receptors (Film). In the anterior area , the size 1 film is used and always placed in a VERTICAL direction .

giulio
Download Presentation

Paralleling Technique – Part 2 Film Sizes and Rules

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Paralleling Technique – Part 2Film Sizes and Rules Resource Reading: Chapter 17 – pp. 158 – end of chapter

  2. Receptors (Film) • In the anterior area, the size 1 film is used and always placed in a VERTICAL direction. • In the posterior area, the size 2 film is used and is always placed in a HORIZONTAL direction.

  3. XCP with film in place

  4. Rules for Paralleling Technique • There are 5 Basic rules: • Receptor Placement • Receptor Position • Vertical Angulation • Horizontal Angulation • Film Receptor Exposure

  5. #1. Receptor Placement • Place the film directly behind the teeth you are trying to capture. • Maxillary canine – A • Maxillary Central and lateral incisors – B • Mandibular canine – C • Mandibular lateral and central incisors - D Anterior Film Placements

  6. #1 – Receptor Placement • Place the film directly behind the teeth you are trying to capture. • Maxillary premolar shot – A • Maxillary molar shot – B • Mandibular premolar shot – C • Mandibular molar shot - D Posterior Placement

  7. #1 Receptor Placement • An easy way to tell if the film is placed correctly is to make sure that the bite block is projecting out over/under the occlusal or incisal surfaces of the the teeth you are trying to capture.

  8. #2. Receptor Position • The receptor must be positioned to the long axis of the tooth. • The receptor and XCP must be positioned away from the teeth and toward the middle of the oral cavity. The mandibular molars are the only exception to this.

  9. #3. Vertical Angulation of the Cone • The central ray should be directed perpendicular (at a right angle) to both film and tooth. • Vertical angulation refers to the “up & down” movement of the cone.

  10. #4. Horizontal Angulation • The central ray of the x-ray beam must be directed through the contact areas of the teeth. • Horizontal angulation refers to the “left to right” movement of the cone.

  11. #5. Film Receptor Exposure • The end of the cone MUST line up with the placement ring of the of the Rinn.

  12. Failure to Follow Rule #5… • Failure to do so will result in what is called a “conecut”. • This concept will discussed more later in the course (Chapter 20)

  13. Let’s go try on Dexter!

More Related