Download - Prostho III Lec 1 Modified
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 1/16
1
Introduction to Prosthodontics III
*Complete denture fabrication steps:
-How many basic minimum clinical steps are required to fabricate a C.D
without a recall?
- 5 clinical steps, then we have a recall and 4 laboratory steps
*Clinic 1:
1-History taking: the collected data about individual, family,
environmental factors (including medical/dental history) and any other
information that may be useful in analyzing and diagnosing conditions or for instructional purposes
2- Examination.
3-Treatment planning.
4-Primary Impressions…using impression compound in stock tray
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 2/16
2
*Lab1:
-Primary casts…made from gypsum type II (dental plaster)
-Custom trays: an individualized impression tray made from a cast
recovered from a preliminary impression. It is used in making a final
impression
*Clinic 2:
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 3/16
3
-Secondary/master/final impressions: the impression that represents the
completion of the registration of the surface or object
-secondary impression is taken by zinc oxide eugenol
*Lab 2:
-Secondary/master/final casts: a replica of the tooth surfaces, residual
ridge areas, and/or other parts of the dental arch and/or facial structures
used to fabricate a dental restoration or prosthesis….then we fabricate
record base (record block).
-Record base: base plate and wax rim
-base plates: a rigid, relatively thin layer of wax, shellac, or
thermoplastic (heat activated polymer) or chemical activated polymer,
Or photo- activated polymer adapted over edentulous surfaces of a
definitive cast to form a base which, together with an attached occlusalrim made of wax or similar material, serves as the record base
-Wax rims: occluding surfaces fabricated on interim or final denture
bases for the purpose of making maxillomandibular relation records and
arranging teeth — called also record rim
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 4/16
4
*Clinic 3:
-Jaw Registration stage: a registration of any positional relationship of
the mandible relative to the maxillae.
-These records may be made at any vertical, horizontal, or lateral
orientation
-we record these relations according to the following order:
1. Aesthetics (maxillary wax rim): the effect produced by a dental
prosthesis that affects the beauty and attractiveness of the person…the
first factor we depend on during registration of the relation between themaxilla and the mandible is the esthetics
-we should have enough labial fullness, incisal show and buccal corridor
Wax rims
Base plate
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 5/16
5
Nasolabial angle
should be 90 degree
Incisal show should be
1-2 mm at rest position
Fox plane instrument
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 6/16
6
- Once we make the (inter pupillary line & the camper's plane & theocclusal plane) once they are parallel to each other and we are satisfied
that the upper rim is in the right position. There are certain checks that wecan do: the phonetic check & the anatomic check . The phonetic check
such as the "S" sound, "F" & "V" sounds.
-Once we finish the maxillary rim we need to mark certain lines which
are the midline of the patient's face & the canine lines. In order to knowwhere to put the teeth & the size of the teeth
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 7/16
7
2. Vertical (VD) & horizontal (RCP) relations.
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 8/16
8
>>> What happens if we change the vertical dimension or we didn'tgive the patient the right vertical dimension and give him too high
vertical dimension??
>>> What will happen if we do the opposite (give the patient a small
vertical dimension)??
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 9/16
9
3. Shade & Mould.
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 10/16
10
*Lab3:
-Mounting on articulator: the laboratory procedure of attaching a cast toan articulator
-Dental Articulator: a mechanical instrument that represents the
temporo-mandibular joints and jaws, to which maxillary and mandibular
casts may be attached to simulate some or all mandibular movements
-Teeth Arrangement (Tooth Setting): the placement of teeth on a
denture with definite objectives in mind or can be defined as the placement of teeth on trial bases
*Clinic 4:
-Try in: the process of placing a trial denture in the patient’s mouth for
evaluation of a preliminary arrangement of denture teeth that has been prepared for placement into the patient’s mouth also used to evaluateesthetics and maxillomandibular relationships
-during this step we shortly repeat all the steps of JRR (Repetition of
previous visit: JRR) also at the end of this visit we determine the post
dam area.
-Post dam determination: the seal area at the posterior border of amaxillary removable dental prosthesis or the soft tissue area at or beyond
the junction of the hard and soft palates on which pressure, within
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 11/16
11
physiologic limits, can be applied by a complete RDP to aid in its
retention.
*Lab 4:-Denture processing: that means by which the denture base materials are
polymerized to the form of a denture or the conversion of the wax pattern
of a denture or a portion of a denture into resin or other material
-Flasking: the act of investing in a flask or the process of investing thecast and a wax replica of the desired form in a flask preparatory to
converting the restorative material into the desired product.
-Dewaxing: the act of removing the wax pattern in order to put acrylic
instead to get the final denture
-Packing: the act of pressing a denture base material into a mold within a
refractory flask.
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 12/16
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 13/16
13
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 14/16
14
7/28/2019 Prostho III Lec 1 Modified
http://slidepdf.com/reader/full/prostho-iii-lec-1-modified 15/16
15