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1. Huckaba Analysis
• Recommended by HUCKABA. G. W in
1964.
• Compensates for radiographic enlargement
of tooth image in periapical film.
• It is based on the assumption that degree of
magnification for a primary tooth will be
the same as that of its underlying permanent
successor on the same film.
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2. Method
• Measure• 1. Width of the primary teeth on the x-ray film y’
• 2. Width of its underlying permanent successor x’
on the x ray film
• 3. Primary tooth on the cast y
• 4. Width of unerupted permanent tooth is
calculated by- x = x’y
y’
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3. • The value obtained for the mandibular incisors on
the cast and those for canines and premolars on
the radiographs were added to provide the space
required.
• Space available is obtained by extending the brass
wire from the mesio buccal of 1st permanent molar
on one side, passing through the incisal edge of
anterior teeth, and to the buccal cusps of 1st molar
on the opposite side.
• The difference in the value obtained for space
required and space available is the amount of
discrepancy.
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4. Hixon & Oldfather Analysis
• This procedures combines measuremnts
from the dental casts and width
measurements from the peri apical
radiographs.
• This method (1956); modified by Staley &
Kerbers(1980) is restricted to the analysis
of the supporting zone in the mandible.
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5. Procedure
• Measure the size of unerupted 1st & 2nd
premolar in one mandibular quadrant from a
peri apical radiograph.
• Determination of mesio distal tooth width
of the lower central and lateral incisors on
the study cast to the side of the radiograph.
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6. • After adding together both figures, the
probable width of the permanent canine and
1st & 2nd premolars for the corresponding
quadrant can be read off in the prediction
graph under the column of the calculated
sum total.
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7. • X-axis : Mandibular incisor width measured
on the dental cast + total width of 1st & 2nd
premolar on the peri apical radiograph.
• Y-axis : Predicted total width of permanent
mandibular canine and 1st & 2nd premolar.
• The formula for calculationΣ3+4+5=[(Σ 1+2+x4+x5) X 0.7158]+2.1267
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8. Thank you
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