3. Q : A 60 year old male patient came for replacement of missing teeth.
On intraoral examination you found out patient is edentulous. His
maxillary residual ridge is low well rounded and mandible has knife edge
ridge. Maxillary and mandibular arches belong to which order of A
Atwoods classification?
a) Maxilla order 4 and mandible order 5
b)Maxilla order 5 and mandible order 4
c)Maxilla order 1 and mandible order 2
d) Maxilla order 6 and mandible order 7
4. Pre Extraction records
• Patient photographs
• Diagnostic casts
• Radiographs
• Pic of close relatives
• Previous dentures
6. DIAGNOSTIC CASTS
A diagnostic dental cast is a
cast/ model of a person’s
teeth that a dental
professional uses as a guide
in the application of
corrective or restorative
dentistry. Such diagnostic
casts are often referred to
as study models.
7. STUDY MODEL
• A study model dental cast
is
a positive reproduction of
the form of tissues of the
upper jaw or lower jaw,
which is made in an
impression and over which
denture bases or other
dental restorations may be
fabricated.
8. DIAGNOSTIC CAST
• Obtained from primary
impression.
• It allows the evaluation of
hard and soft tissue
anatomy without the
presence of the patient.
Diagnostic casts provide
the base from which
custom impression trays
are fabricated.
18. • Show the relative thickness of the submucosa covering the bone in
edentulous regions,
• the location of the mandibular canal, and
• the mental foramina in relation to the basal seat for dentures
More superficial
location of
mental
foramen, more
will be the bone
resorption
19. Gives an idea
about quality of
bone
More
radiopaque
bone, denser it
will appear on
radiograph
21. Diagnostic casts , Radiographs and photographs helps in selecting
impression technique, planning pre-prosthetic surgery and selection of
teeth., ultimately formulating a treatment plan.
