Presentation is loading. Please wait.

Presentation is loading. Please wait.

Welcome ! 1. Dental anatomy and Imaging With Eriks Oct 2012 2.

Similar presentations


Presentation on theme: "Welcome ! 1. Dental anatomy and Imaging With Eriks Oct 2012 2."— Presentation transcript:

1 Welcome ! 1

2 Dental anatomy and Imaging With Eriks Oct

3 Dental Anatomy 3 General naming of teeth: Tip: Views always look into the patients mouth (not your own). Maxillar (Upper) Mandibular (Lower)

4 Dental Anatomy 4 Directions:

5 Dental Anatomy 5 Tooth numbering: Always look into the patients mouth (not your own). ADA System: International System: Kids (1 st set of teeth) have there own numbering with letters !

6 Dental Anatomy 6

7 Intraoral imaging: 7 Periapical image: Bitewing: (interproximal) Health of teeth, roots, bone. Interproximal decay (caries)

8 Intraoral imaging: 8 Occlusal image: exploring calcifications of the sublingual salivary glands.

9 Magnification Equal image enlargement Caused by long object-sensor distance and short source-object distance Minimized by controlling distance factors & focal spot Intraoral imaging technique:

10 Shape Distortion Variation of the true shape of the object Vertical distortion results in elongation foreshortening or Horizontal distortion results in image widening and overlapping Intraoral imaging technique:

11 11 Intraoral imaging technique:

12 Assembled Instruments 1. Anterior PA views right and left maxillary and mandibular 2. Bitewing views right and left 3. Posterior PA views right and left maxillary and mandibular

13 Paralleling Periapical Technique Applies most rules of accurate image formation Most accurate periapical technique Preferred technique for periapical imaging

14 Bitewing Technique Applies principles of paralleling technique to imaging the teeth crowns Used to record interproximals Most accurate view of the crowns and bony margins Intraoral imaging technique:

15 +20º 0º Vertical Angulation (with tabs) When the film is positioned in the mouth, the upper portion of the film is angled approximately +20° as it contacts the palate. In the mandible, the film is upright (0° angle). The average between these two angles is +10°. This +10° is the vertical angulation selected when using bitewing tabs.

16 Bisecting Angle Periapical Technique Applies one of the rules for accurate image formation Angle is formed by sensor and object Produces images with shape distortion and magnification Intraoral imaging technique:

17 Intraoral imaging technique: FMX (Full Mouth X-Ray) obsolete!

18 FMX Not to be confused with (although you might need dental a FMX after this):

19 Foreshortening Short image from too much vertical angulation Correction - place receptor parallel to tooth long axes and reduce the vertical angle Placement Errors

20 Elongation Long image from not enough vertical angulation Correction - place receptor parallel to tooth long axes and increase the vertical angle Placement Errors

21 Horizontal Overlap Teeth widening and overlapped contacts from diagonal entry of the x-ray beam To correct, place receptor parallel to horizontal plane, direct beam through proximal contacts Placement Errors

22 Cone Cut Zone of non- exposure from not centering x-ray beam over receptor To correct, direct central ray through entry point and to the center of the receptor Placement Errors

23 Receptor not placed in proper position to cover desired structures Use receptor placement guidelines Placement Errors Positioning Error

24 Exposure Error System will correct for most over or underexposures Overexposure – exposure factors set too high Underexposure – exposure factors set too low

25 Dental Anatomy 25

26 Digital Pan Landmarks & Positioning Errors Hyoid bone Outline of Ear Eye Socket Sinus Calcification of carotid Necklace shadow Eagles TMJ Spine Nasal fossa/Airways Sinus Mandibular canal Mental foramen Septum Patient demonstrates too much smile – chin is positioned too far down 26

27 P1…Panoramic P1C…25% Magnification & Special Needs P1A…Artifact Reduced P12…Anterior Views S1…Sinus Frontal TM1…Lateral TMJ Open / Closed MS1…Slices (molar region) BW1…Bitewing View BW2 ORTHOPHOS XG 3D Ready 2D PROGRAMS T h e D e n t a l C o m p a n y Right - Left Upper - Lower P2 =Dentition – P2A Artifact Reduced – P2C Constant Magnification also for Compromised Patients P10…Pediatric Upper Lower 6 TMJ views offered 4 Sinus views 27

28 ORTHOPHOS XG 3D Ready 2D PROGRAMS T h e D e n t a l C o m p a n y Easy Patient Positioning (select appropriate bite piece, contact segment, or chin rest) General Information – Cover all patient contact surfaces with hygienic covers Patient must remove: Glasses All jewelry above the neck, to include earrings, necklaces, metal hair pins All removable appliances in the mouth that are removable Easy Pad Assists with Correct Selections Tap on P1, P1A, P1C To access sub programs Tap to Scroll through programs ( ­ ) ( + ) touch pad 28

29 ORTHOPHOS XG 3D Ready 2D PROGRAMS T h e D e n t a l C o m p a n yReview:Workstation Select patient from Worklist or Register patient in SIDEXIS Select PAN GREEN flashing light indicates Ready Digital Pan On LCD Screen Select Program – Patient Type, Etc. Position Patient (if using lead apron solid is to back) Use light to make certain Mid and Frankfurt correct Remind Patient to swallow, place and keep tongue at Roof of mount, and keep lips closed during digital Image taking. Remote Exposure Station Remote Exposure Station – Confirm Selections Press and hold to initiate exposure 14 sec. until you hear (3) beep-beep-beep sound the procedure is complete and unit is at rest Digital Pan LCD Display Shows snapshot of image - tap screen to remove image Send image to PACS 29

30 Support : opt. 2, opt. 2 Patient Positioning Devices One Piece Yellow Bite Block and Contact Segment – For Panoramic Images Bite Block Contact Segment Patients with anterior front teeth anterior teeth in groove Patients with missing anterior teeth Position under nose with cotton roll or 4x4 for space relationship Chin Rest – for patients with stability issues Patients with anterior front teeth Patients with missing front teeth 30

31 Support : opt. 2, opt. 2 Patient Positioning Devices -Continued Universal More Positioning Guides: Universal Positioners Used with/for: Use Recommendations AutoFunction Reorder Foam Inserts Cat. #AutoPositionFunction pcs. EA withwithout For patients with and without Eliminates chin cut off. Anterior teeth. Assists operator with proper Occlusal and Frankfurt Positioning. Eliminates chin cut off. All Purpose -Sliding Bite Piece Positioner-Optional Sliding Positioner Cat. # Universal for Pan, TSA, etc. // Optional – may be purchased as accessory EA EA. withwithout For patients with and without Anterior teeth. One positioning piece for all Panoramic Programs = = 31

32 Support : opt. 2, opt. 2 Patient Positioning Devices -Continued Sinus Views More Positioning Guides: Sinus Views Used with/for: Use Recommendations Short Blue Positioning Contact Segment & Bite BiteBlock Patient is Positioned Lower to permit SINUS Area in FOV (field of view) Check Programs on LCD Easy Pad for correct positioning piecePrograms: S1 & S3 S1 & S3Programs: S2 & S4 S2 & S4 32

33 Support : opt. 2, opt. 2 Patient Positioning Devices -Continued TMJ Images Panoramic TMJ Programs Forehead and Temple Supports Red Frankfurt and Mid Sagittal Light Lines 33

34 TMJ Lateral - Medial Lateral Medial TM 1.1 TM 1.2 closed open TMJ Head Positioner and Stabilizer 34

35 Support : opt. 2, opt. 2 Patient Tilted AIR (to remove have patient swallow just before image is taken) Hyoid shadow Positioning Errors 35

36 Pan with Necklace shadow and too much smile 36

37 Lead blocker– does this office use a Lead Apron? OR was this patient In a wheelchair with metal bar on headrest? Necklace shadow Poor Patient Positioning plus artifacts 37

38 Metal around Neck causes ARTIFACT = Patient with Metal around neck (like necklace) causes artifact on image Always have patient remove necklace that lays above C7/T1 vertebra. Wrong Right = L Interferes with beam 38

39 Cephalometric image Lateral Full Skull Ceph View with Landmarks SIDEXIS XG Nasion Orbital Anterior Nasal Spine Subspinale Pogonion Pterygomaxillary Fissure Sella Turcia Porion Basion 39

40 Ceph tracing Anatomy 40


Download ppt "Welcome ! 1. Dental anatomy and Imaging With Eriks Oct 2012 2."

Similar presentations


Ads by Google