Reference points for facebow
Download as PPTX, PDF5 likes5,716 views
The document discusses the facebow, an instrument that records the spatial relationship of the maxillary arch to anatomical reference points for dental casts. It highlights various anterior and posterior reference points used to establish mounting planes and comparability in dental studies. The importance of these reference points for accurate visualization and orientation within articulators is emphasized.
Reference points for facebow
- 1. REFERENCE POINTS FOR FACEBOW Dr Aaryas Vlogs
- 2. facebow fas bo: an instrument used to record the spatial relationship of the maxillary arch to some anatomic reference point or points and then transfer this relationship to an articulator; it orients the dental cast in the same relationship to the opening axis of the articulator; customarily the anatomic references are the mandibular transverse horizontal axis and one other selected anterior reference point (GPT 9) Dr Aaryas Vlogs
- 3. Anterior reference points Posterior reference points Dr Aaryas Vlogs
- 4. Anterior reference points Dr Aaryas Vlogs
- 6. ADVANTAGES OF ANTERIOR REFERENCE POINT • Determineswhichplaneintheheadwillbecometheplaneofreference. • Determinesthelevelatwhichthecastsaremounted. • Establishabaselineforcomparativestudiesbetweenpatient. • Canvisualizeanteriorteeth&occlusioninthearticulatorinsame frameofreference. Dr Aaryas Vlogs
- 7. 1. Nasion(A)Usedwithquickmountfacebow(Whipmix) 2. Orbitale(B)LocatedbyHanaufacebowwithhelpoforbital pointer.(Faciatype,earpiecetype) 3. Orbitaleminus7mm(C)ThisplanerepresentsFrankfort plane 4. Alaofnose(D)ThisplanerepresentsCampersplane 5. 43mmsuperiortolowerborder ofupperlip (Denarreferenceplanelocator–Denar/Slidematicfacebow usesthisreferencepoint) ANTERIORREFERENCEPOINTS Dr Aaryas Vlogs
- 8. ORBITALE •Lowest Point on the infraorbital rim, palpated through tissue and skin. •One orbitale and two posterior points determine the Axis-Orbital plane. Dr Aaryas Vlogs
- 9. ORBITALE MINUS 7MM •The F-H plane passes through both porion and orbitale point. Dr Aaryas Vlogs
- 10. NASION MINUS 23MM • Sicher • Deepest part of the midline depression just belowthe level of the eyebrow. • The nasion guide is designed to be used with whipmixarticulator, which fits in the depression. Dr Aaryas Vlogs
- 11. NG- Nasion guide Cb- facebow cross bar Dr Aaryas Vlogs
- 12. ALAE OF THE NOSE • The tentative occlusal plane should be parallel to horizontal plane. • This can be achieved in 2 ways- The line from the alae of the nose to centre of the auditory meatus - Camper’s line. 1. Pointer on right or left alae 2. Occlusal rim parallel to camper‘s line ,transfer with face bow . Dr Aaryas Vlogs
- 13. 43 mm superior to lower border of upper lip Denarreferenceplanelocator Denar/Slidematicfacebowusesthis referencepoint Dr Aaryas Vlogs
- 14. POSTERIOR REFERENCE POINTS A) Bergstrom point B) Beyron point C) Gysi point D) Snow point E) Denar’s point Dr Aaryas Vlogs
- 15. BERGSTROM POINT 10mm anterior to the center of the spherical insert for the external auditory meatus and 7mm below the Frankfort horizontal plane. Bergstrom point is found to be most frequently closest to the hinge axis Dr Aaryas Vlogs
- 16. BEYRON POINT 13mm anterior to the posterior margin of the tragus of the ear on a line from the center of tragus extending to the corner of the eye. Dr Aaryas Vlogs
- 17. GYSI POINT • 13mm in front of the most upper part of the external auditory meatus on a line passing to the outer canthus of the eye. most common point used today. Dr Aaryas Vlogs
- 19. Dr Aaryas Vlogs
- 20. Dr Aaryas Vlogs
- 21. Dr Aaryas Vlogs
- 22. Dr Aaryas Vlogs
- 23. Dr Aaryas Vlogs
- 24. Thanks for watching………………… Dr Aaryas Vlogs
Editor's Notes
- #9: ease of location concept is easy to teach and understand.