16. CLASSIFICATION
Pell & Gregory
A. Relation of the tooth to the ramus of the
mandible & the second molar.
CLASS--1
CLASS--2
CLASS--3
B. Relative depth of third molar in bone.
POSITION -- A
POSITION -- B
POSITION -- C
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17. George Winter’s
C. Position of long axis of 3rd molar v/s 2nd molar
- VERTICAL
-HORIZONTAL
-INVERTED
-MESIOANGULAR
-DISTOANGULAR
-BUCCOANGULAR
-LINGUOANGULAR
•BUCCOVERSION
•LINGUOVERSION
•TORSION
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Classification(contd..)
18.
19. INDICATIONS
- Pericoronitis
- Periodontal disease
- Dental caries
- Pathological root resorption
- Retention in edentulous ridge
- Cyst formation
- Neoplasm's
- Pain of unexplained origin
- Crowding of dentition
- Involvement in fracture
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35. DIFFICULTY INDEX
Spatial relation
Mesioangular 1
Horizontal/Transverse 2
Vertical 3
Distoangular 4
Depth
Level A 1
Level B 2
Level C 3
Ramus relation
Class 1
Class 2
Class 3
Minimally difficult---3-4
Moderately difficult--5-7
Very difficult---------7-10
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39. BASIC STEPS:
•Study the radiographs
Tooth/ Roots
Classify
Occlusal view
Relationship with IAC
Review of results
•Outline the soft tissue flap
•Sectioning / Bone removal
•Estimation of surrounding bone tissue
•Chose a Best method/Instruments
•Path of withdrawal
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55. IMPACTED MAXILLARY CANINE
ETIOLOGY: - Hard palatal bone
- Mucoperiosteum
- Eruption of canine
- Distance to travel
- Development of crown
- Unfavorable environment
- Space
- Mesio-distal width of primary
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56. CLASSIFICATION
CLASS -1 PALATAL
(Horizontal,Vertical, Semivertical)
CLASS -2 LABIAL/BUCCAL
(Horizontal,Vertical, Semivertical)
CLASS -3 LABIAL & PALATAL
CLASS -4 ALVEOLAR PROCESS/ Vertically
between incisor & 1st premolar
CLASS -5 EDENTULOUS MAXILLA
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