Study models

.
Frontal video image with the superimposed
cephalometric tracing.
www.indiandentalacademy.com

Fig. 2 Patient video
image.

Fig. 4 Dental cast image

Fig. 5 DigiGraph head holder.

Fig. 6 Model board inserted in head holder.

Fig. 7 Light box attached to head
holder.

Fig. 28 Progress intraoral records taken with DigiGraph.

Fig. 8 DigiGraph monitor and
keyboard.

Fig. 9 Sony video printer

Fig. 10 Digitizing handpiece with removable tips.

Fig. 11 DigiGraph Consultation Station.

Fig. 12 Patient history screen.

Fig. 13 DigiGraph main menu

Fig. 14 Patient images in traditional grouping.www.indiandentalacademy.com

Fig. 15 Adjusting patient's position in head

Fig. 16 Landmarks digitized directly from patient.

Fig. 17 As each landmark is digitized, it is superimposed over video
image.

,
Fig. 20 Video image (A) modified by dragging light pen across screen
to produce new image (B).

Fig. 21 "Before and after" images produced
with "cut and paste" function.

Fig. 22 Light pen used to draw over video image.www.indiandentalacademy.com

Fig. 1 In severe overjet case, base must be thick enough to prevent fracture
due to extended lower anterior section and deep labial sulcus.

Fig. 2 Solid line shows "Highlands trim"; dashed line shows
standard Angle trim.www.indiandentalacademy.com

Fig. 3 With "Highlands trim", surfaces are cut as close and
parallel to buccal segments as possible.

Fig. 4 A. Occlusal, buccal, and frontal photographs of study
models with "Highlands trim". B. Photocopies of same
models. www.indiandentalacademy.com

Fig. 1 Typical photocopy of models as used in this
study. www.indiandentalacademy.com

Fig. 1 Clear plastic oral screen prepared for impression
taking by affixing adhesive tape to its free margins.

Fig. 2 Impression taking with the oral screen in place.www.indiandentalacademy.com

Fig. 3 Poured model following removal of vestibular impression.

Fig. 4 Forming the upper art base.www.indiandentalacademy.com

Fig. 5 Forming the lower art

Fig. 6 The finished vestibular model.

Fig. 1 Central groove cut into the backs of models.

Fig. 2 Triangular file used to cut central orientation
groove.

Fig. 5 Typical ideal normal Class I occlusogram.www.indiandentalacademy.com

Fig. 6 Patient #19. Bolton Analysis suggests that upper anteriors are
3.8mm too wide. However, models and occlusogram show an ideal
arrangement. www.indiandentalacademy.com

Fig. 7 Patient #14. Bolton Analysis suggests that lower anteriors
need 2.4mm of interproximal reduction. Models and
occlusogram reveal no such requirement.www.indiandentalacademy.com

Fig. 8 Occlusal mapping. A. Natural arch perimeter drawn on
occlusal map. B. Natural arch perimeter without map. C. Idealized
occlusal map drawn by lining up teeth on natural arch perimeter..)

Fig. 9 Arch length discrepancy measured by
superimposing idealized arch form on the original.www.indiandentalacademy.com

Fig. 10 Class II division 2 case appears to have little overjet.
Occlusogram reveals 3mm of overjet.

Fig. 11 Case with no tooth size discrepancy according to the Bolton
Ratios.
Occlusogram reveals obvious discrepancy.

Fig. 14 Case with undetected tooth size discrepancy.
Occlusogram revealed 4mm of excess lower tooth mass.

Fig. 15 Diagnostic occlusogram for case in Figure 14, with
one lower incisor removed.

Fig. 16 Case in Figure 14, following treatment. Diagnostic
occlusogram suggested interproximal tooth reduction as the
treatment of choice.

Angle guide, squaring tool,sand paper etc.

Squaring tool used to trim
Excess base.

mid palatal raphe as an reference plane for
the rest of the model trimming procedures

Buccal segments trimmed at 65 degree angle

Anterior segments trimmed at 25 degree angle

Anterior segment begins at a point in the middle of the
canine.
The two ant segments meet at a point that is an extensionwww.indiandentalacademy.com

Posterior segments are trimmed at an angle of 115
degrees

Trimming excess stone from the mandibular heel.
The wax bite registration should be in place when trimming
occluded Models.

Squaring tool to trim the mand base so that it is parallel to the
Max base. Here the height of the mand (32 mm) should be maintained

With the casts occluded, trim the back of the mand cast.

Mand posterior segments are trimmed at an angle of 115 degrees

Buccal segments are trimmed at an angle of 55 degrees.
The distance should be 5mm from buccal surfaces of the teeth

Semicircular mark from canine to canine(midline).This indicates the
Anterior segment of lower basenot closer than 5mm from buccal
surfaces of the tooth.

Gently carving for any excess tooth material in sulcus area

Extra fine No 600 sandpaper to smooth sulcus area by hand.

Fine sanding wheel to smooth out scrathes left by rough wheel

Allow the models to dry for 24 hrs and label before soaping.They
Should be soaked for 20 min.Rinse off the excess soap & buff with
A soft cotton cloth.

Study models

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