Basic Cephalometrics
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com

www.indiande...
Purpose of Cephalometrics
•
•
•
•

Study craniofacial growth
Diagnosis
Planning orthodontic treatment
Evaluation of treate...
Cephalostat
15"
15"

60"
60"
Source Plane
Source Plane

X-ray Source
X-ray Source
Mid-saggital Plane
Mid-saggital Plane

P...
Cephalostat

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Cephalostat

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Cephalometric Values for
Selected Groups
White

Black

Israeli

Chinese

Japanese

SNA

82

85

82

82

81

SNB

80

81

7...
What Are We Trying to
Accomplish?
• Find out skeletal classification
– anteroposterior
– vertical

• Find out angulation o...
What Are We Trying to
Accomplish? (In other words)
• Is the patient Class I, II, III skeletal?
• Does the patient have a s...
Structures to be Traced

www.indiandentalacademy.com
Standard Cephalometric
Landmarks
Sella

Nasion
Orbitale

Porion

ANS

Articulare

A Point
B Point
Gonion

Pogonion
PNS
Men...
Radiographic Landmarks

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Frequently Used Planes
SN Plane
Frankfort Plane
Palatal Plane
Occlusal Plane
Mandibular Plane

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Skeletal Assessment
SNA
Antero-posterior maxillary assessment

82

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Skeletal Assessment
SNB
Antero-posterior mandibular assessment

80

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Skeletal Assessment
ANB
Antero-posterior bimaxillary assessment

2

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Skeletal Assessment
Wits (AO-BO)

-1 mm
BO anterior to
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AO
Skeletal Assessment
Y Axis
66

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Skeletal Assessment
Y Axis (to Frankfort Horizontal)
Vertical Skeletal Assessment

59

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Skeletal Assessment
NS(SN plane)-GoGn
Vertical Skeletal Assessment

32

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Dental Assessment
U1-NS (Max 1 - SN)
Incisor Angulation Assessment

104

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Dental Assessment
Max 1 - NA (degrees)
22

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Dental Assessment
Max 1 - NA (mm)

4 mm

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Dental Assessment
L1-GoGn (Man 1 - GoGn)
Incisor Angulation Assessment

95

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Dental Assessment
Man 1 - NB (degrees)

25

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Dental Assessment
Man 1 - NB (mm)

4 mm

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Dental Assessment
APog - Man 1

2 mm +/- 2

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Dental Assessment
U1-L1 (Max 1 - Man 1)
Inter-Incisor Angulation Assessment

130

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Soft Tissue Assessment
E Plane

-2 mm

CHANGES WITH AGE!
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Soft Tissue Assessment

>4 mm.

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Composite Cephalometric
Tracing

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Nasorespiratory Considerations
Children with airway obstruction, when
compared to normal controls, show:

• Increased tota...
Cases

www.indiandentalacademy.com
Thank you
For more details please visit
www.indiandentalacademy.com

www.indiandentalacademy.com
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Ceph /certified fixed orthodontic courses by Indian dental academy

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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.

Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078

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Ceph /certified fixed orthodontic courses by Indian dental academy

  1. 1. Basic Cephalometrics INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. Purpose of Cephalometrics • • • • Study craniofacial growth Diagnosis Planning orthodontic treatment Evaluation of treated cases Cephalometrics is a technique employing oriented radiographs for the purpose of making head measurements. www.indiandentalacademy.com
  3. 3. Cephalostat 15" 15" 60" 60" Source Plane Source Plane X-ray Source X-ray Source Mid-saggital Plane Mid-saggital Plane Patient in Head Patient in Head Positioning Device Positioning Device www.indiandentalacademy.com Film Plane Film Plane X-ray Film in X-ray Film in Cassette Cassette
  4. 4. Cephalostat www.indiandentalacademy.com
  5. 5. Cephalostat www.indiandentalacademy.com
  6. 6. Cephalometric Values for Selected Groups White Black Israeli Chinese Japanese SNA 82 85 82 82 81 SNB 80 81 78 79 77 ANB 2 4 4 3 4 U1-NA 4 mm, 22 7 mm, 23 5 mm, 24 5 mm, 24 6 mm, 24 L1-NB 4 mm, 25 10 mm, 34 6 mm, 29 6 mm, 27 8 mm, 31 U1-L1 131 119 124 126 120 GoGn-SN 32 32 35 32 34 L1-MnPl 93 100 93 93 96 L1-FH 62 51 57 57 57 Y axis 61 63 61 61 62 from Proffit,Contemporary Orthodontics, 1992 www.indiandentalacademy.com
  7. 7. What Are We Trying to Accomplish? • Find out skeletal classification – anteroposterior – vertical • Find out angulation of incisors • Consider soft tissue – facial profile – airway considerations www.indiandentalacademy.com
  8. 8. What Are We Trying to Accomplish? (In other words) • Is the patient Class I, II, III skeletal? • Does the patient have a skeletal open bite growth pattern, or a deep bite growth pattern, or a normal growth pattern? • Are the maxillary/mandibular incisors proclined, retroclined or normal? • Is the facial profile protrusive, retrusive, or straight; can the patient breathe normally? www.indiandentalacademy.com
  9. 9. Structures to be Traced www.indiandentalacademy.com
  10. 10. Standard Cephalometric Landmarks Sella Nasion Orbitale Porion ANS Articulare A Point B Point Gonion Pogonion PNS Menton Gnathion www.indiandentalacademy.com
  11. 11. Radiographic Landmarks www.indiandentalacademy.com
  12. 12. Frequently Used Planes SN Plane Frankfort Plane Palatal Plane Occlusal Plane Mandibular Plane www.indiandentalacademy.com
  13. 13. Skeletal Assessment SNA Antero-posterior maxillary assessment 82 www.indiandentalacademy.com
  14. 14. Skeletal Assessment SNB Antero-posterior mandibular assessment 80 www.indiandentalacademy.com
  15. 15. Skeletal Assessment ANB Antero-posterior bimaxillary assessment 2 www.indiandentalacademy.com
  16. 16. Skeletal Assessment Wits (AO-BO) -1 mm BO anterior to www.indiandentalacademy.com AO
  17. 17. Skeletal Assessment Y Axis 66 www.indiandentalacademy.com
  18. 18. Skeletal Assessment Y Axis (to Frankfort Horizontal) Vertical Skeletal Assessment 59 www.indiandentalacademy.com
  19. 19. Skeletal Assessment NS(SN plane)-GoGn Vertical Skeletal Assessment 32 www.indiandentalacademy.com
  20. 20. Dental Assessment U1-NS (Max 1 - SN) Incisor Angulation Assessment 104 www.indiandentalacademy.com
  21. 21. Dental Assessment Max 1 - NA (degrees) 22 www.indiandentalacademy.com
  22. 22. Dental Assessment Max 1 - NA (mm) 4 mm www.indiandentalacademy.com
  23. 23. Dental Assessment L1-GoGn (Man 1 - GoGn) Incisor Angulation Assessment 95 www.indiandentalacademy.com
  24. 24. Dental Assessment Man 1 - NB (degrees) 25 www.indiandentalacademy.com
  25. 25. Dental Assessment Man 1 - NB (mm) 4 mm www.indiandentalacademy.com
  26. 26. Dental Assessment APog - Man 1 2 mm +/- 2 www.indiandentalacademy.com
  27. 27. Dental Assessment U1-L1 (Max 1 - Man 1) Inter-Incisor Angulation Assessment 130 www.indiandentalacademy.com
  28. 28. Soft Tissue Assessment E Plane -2 mm CHANGES WITH AGE! www.indiandentalacademy.com
  29. 29. Soft Tissue Assessment >4 mm. www.indiandentalacademy.com
  30. 30. Composite Cephalometric Tracing www.indiandentalacademy.com
  31. 31. Nasorespiratory Considerations Children with airway obstruction, when compared to normal controls, show: • Increased total and lower face heights • More retrognathic mandibles • Steeper (increased) mandibular plane angles • Spontaneous improvement after reestablishment of normal respiration www.indiandentalacademy.com
  32. 32. Cases www.indiandentalacademy.com
  33. 33. Thank you For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com

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