Cephalometric Analysis /certified fixed orthodontic courses by Indian dental academy
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Cephalometric Analysis /certified fixed orthodontic courses by Indian dental academy
- 1. CEPHALOMETRIC ANALYSIS INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
- 2. ANALYSIS UTILIZING THE CEPHALOMETRIC TRACING 1) Describe the subject’s dento-facial morphology 2) Quantitative description of morphological deviations 3) Make diagnostic and treatment planing decisions 2) Evaluate change over time - treatment induced and growth process www.indiandentalacademy.com
- 3. Morphological Description Skeletal - horizontal and vertical Dental - horizontal and vertical Comparing individual subject’s tracing to the “ideal” Reference sample Cross-sectional Longitudinal - growth studies eg. Bolton-Brush, Ann Arbor and Burlington www.indiandentalacademy.com
- 5. Cephalometric Evaluation Identification of anatomic landmarks Landmarks: stable reference structures and maxillary and mandibular skeletal and dental Graphically relating the dento-facial elements to these reference structures Angular and or linear measurements www.indiandentalacademy.com
- 6. METHODS OF CEPHALOMETRIC ANALYSIS Two basic approaches Metric approach - use of selected linear and angular measures Graphic approach - “overlay” of individual’s tracing on a reference template and visual inspection of degree of variation www.indiandentalacademy.com
- 7. Metric Method - Use of selected linear and angular measures www.indiandentalacademy.com
- 8. Graphic Method - Use of a Composite Template www.indiandentalacademy.com
- 9. GOALS OF CEPHALOMETRIC ANLYSIS Evaluating relationships, both horizontal and vertical of 5 major functional components of the face: the cranial base; the maxilla; the mandible, the maxillary and mandibular dentoalveolus www.indiandentalacademy.com
- 10. REFERENCE LINES Frankfort’s Horizontal (porion to orbitale) Sella - Nasion line True horizontal plane True vertical plane www.indiandentalacademy.com
- 12. SNA 82 ±±22deg SNA 82 deg NA TO FH 90 ±±33 NA TO FH 90 deg deg SKELETAL HORIZONTAL MAXILLA s n FH a www.indiandentalacademy.com
- 13. SNB 80 ±±22deg SNB 80 deg N-PG TO FH N-PG TO FH 88 ±±66deg 88 deg SKELETAL HORIZONTAL MANDIBLE n s FH b Pg www.indiandentalacademy.com
- 14. ANB 22±±22deg ANB deg SKELETAL HORIZONTAL MAXILLA TO MANDIBLE N A B www.indiandentalacademy.com
- 15. FH TO GOGN 22 FH TO GOGN 22 ±±55deg deg Y AXIS 59 ±±66 Y AXIS 59 deg deg SKELETAL VERTICAL LFH 55% OF TFH LFH 55% OF TFH S FH GO ME www.indiandentalacademy.com GN
- 16. INTERINCISAL INTERINCISAL 130 ±±55deg 130 deg DENTAL - UPPER TO LOWER INCISOR www.indiandentalacademy.com
- 17. U1 TO FH 110 ±± U1 TO FH 110 55deg deg U1 TO NA 22deg U1 TO NA 22deg U1 TO NA 4mm U1 TO NA 4mm DENTAL - MAXILLARY INCISOR N FH A www.indiandentalacademy.com
- 18. L1 TO NB 25deg L1 TO NB 25deg L1 TO NB 4mm L1 TO NB 4mm L1 TO GOGN 91 L1 TO GOGN 91 ±±6deg 6deg DENTAL - MANDIBULAR ANTERIOR N GO B GN www.indiandentalacademy.com
- 19. NASOLABIAL NASOLABIAL ANGLE 102 ±±88 ANGLE 102 deg deg L.LIP TO E L.LIP TO E PLANE -2 ±2mm PLANE -2 ±2mm SOFT TISSUE www.indiandentalacademy.com
- 20. Limitations of the Metric Method Stable reference structures are only relatively stable Validity of landmarks Error in landmark identification www.indiandentalacademy.com
- 21. Graphic Method Template Changes between 2 time points www.indiandentalacademy.com
- 22. Superimposition Method - on the cranial base www.indiandentalacademy.com
- 24. Limitations of Cephalometric Analysis Individual variability Ethnic variability Gender variability www.indiandentalacademy.com
- 25. Thank you Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
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