2. • The anterior teeth are primary selected to satisfy
the aesthetic requirement.
•The posterior teeth are primarily selected to
satisfy the functional requirements
•The anterior teeth are composed of six maxillary
and six mandibular teeth
2
6. 1. Size of the teeth
2. Form of the teeth
3. Color / shade of the teeth
4. Composition of material of teeth
6
7. 1. Pre-extraction records
A. Photographs
B. Diagnostic cast
C. Radiographs
2. Post extraction records
3. Proper contour of occlusal rim and High lip line
4. Arch form and size
7
11. 2.POST EXTRACTION
◦Size and form of edentulous
foundation
◦Matching teeth to face forms
and arch form
◦Previous denture
11
12. 3. Proper contour of occlussal rim and high hip line
Indication for inciso-gingival length
The lower edge of the upper occlusion rim should be 2mm below
the lip when it is at rest.
The distance from the lower edge of the upper occlusion rim to the
high lip line is measured and it represent the length of the upper
anterior teeth
12
13. The size of teeth comprises their width and
length and is represented by the term mold.
The size compromise of:
1. Length (incisogingival)
2. Labiolingual width
3. Mesiodistal width
13
14. 1. A vertical line extending along the lateral surface of the ala often
will pass through the middle of the natural upper canine
2. Measure the distance between the previously marked canine
lines on the maxillary wax occlusion rim.
14
15. 3. Using the flexible ruler. This will indicate the width of the maxillary
six anterior teeth on the curve. Distance between the 2 canine
lines = MD width of the six anterior teeth
4. Measurement on skulls indicate that the width of the natural
central incisor, approximately 1/16 the bizygomatic width patient’s
face
15
16. 1. Outline form of the face
2. Shape of the arch
3. Gender and age
16
20. Sex, personality, age are the factors
which will determine the form of the
anterior teeth
20
21. Curved facial features are associated
with femininity and square features are
associated with masculinity
21
22. MASCULINITY FEMININITY
Prominent teeth Smaller teeth
Square arch form Curved contours and arch
form
Square labial surface Curved labial surface
Square incisal edges and
corners
Round incisal edges and
corners
Darker shade Delicate appearance
Flat smile line Curved smile line
Canine- cervical area is
more prominent and visible
Canine-mesial 3rd only
visible
22
25. YOUNGER PEOPLE OLDER PEOPLE
Lighter shade Darker shade
More incisal
translucency
Less incisal translucency
Minimal wear of incisal
edges
Increased wear of incisal
edges
Curved smiling line Flat smiling line
Pointed canines Loss of tip of canines
25
26. Teeth should be selected according to the
patients personality
The patients
◦ vigorous
◦ delicate.
More squarish and large teeth vigorous
people.
The anteriors should be in flat plane
for executive people
For executives teeth should be
relatively smaller and more symmetrical
26
32. There are two main types:
1. Porcelain,
2. Acrylic
32
33. Acrylic teeth :
1- Not brittle, but poor abrasion
resistance.
2- Esthetic very good.
3- Chemical bonding with denture
base.
4- Easily ground and polish.
5- Transmit fewer forces to the
mucosa.
6- No clicking on contact.
7- Thermal expansion same as acrylic
denture base.
PORCELAIN TEETH :
1- BRITTLE, MORE RESISTANCE TO
ABRASION
2- EXCELLENT (DOES NOT STAIN).
3- MECHANICAL BONDING BY PINS OR
UNDERCUTS HOLES.
4- DIFFICULT TO GRIND AND POLISH.
5- MORE FORCES TO THE MUCOSA.
6- CLICKING ON CONTACT.
7- MUCH LOWER THAN ACRYLIC CAUSES
STRESSES IN ACRYLIC DENTURE BASE.
33
35. It is classified under 2 division, namely:
Size of the teeth
Form of the teeth
35
36. The ff. factors are considered while selecting
the size of the teeth
Buccolingual width
Mesiodistal length
Occlusogingival height
36
37. Buccolingual width
Should be greatly reduced from the width of natural teeth
that they replace.
It should be less than the buccolingual width of the
natural teeth to reduce the force cting on the alveolar
ridge, however ,that should not affect the check supprt
37
38. Mesiodistal width (anteroposterior)
Upper (distal of canine to the tuberosity prominence)
Lower (use a ruler to mark the crest of the mandibular
ridge from the base of the retromolar pad to the canine
area, and then measure from the distal of the canine to
ascending area of the mandible
38
39. Occluso-gingival height
It depends on:
◦ The inter-arch distances between the ridge
◦ Amount of the bone resorption, resorbed residual
ridge RRR
39
40. Factors that control the selection of the form of
the tooth
Condylar inclination
Teeth with a high cuspal height are require for the
patients with steep condylar guidance. This is
because the jaw separation will increase for patient
with acute condylar guidance during protrusion.
40
41. Height of residual ridge
Shallow cusped teeth go better with shallow ridge
Patient’s age:
Teeth with shallow cusps are preffered in older age.
Ridge relationship:
0 degree or monoplane teeth are preferred for
cases with posterior cross bite or severe class II
relationship
41
42. • Cusp teeth
oAnatomic teeth
oSemi anatomic or modified cusp or low cusp
teeth
• Cuspless teeth
42
45. Advantages of anatomic teeth
1.Esthetically acceptable
2.More efficient thereby reducing the
forces
3.They can arranged in balance
4.Offer the maximum opportunity for fully
balanced occlusion
5.more masticatory efficiency
45
46. Disadvantages of anatomic teeth
1.More horizontal during function
2.Need eccentric records and required
adjustable articulator
3.Lateral torque in eccentric contacts and
higher chance for premature traumatic
contacts
4.Difficulty in relining and rebasing
5.Fast bone resorption
6.Cannot be used in severely resorbed cases
46
47.
48. Advantages of semi anatomic teeth
1. Easier to arrange and obtain balance
2. Can provide freedom if setlling occurs
3. Reduction of lateral stresses (decrease lateral force)
4. Provides all the advantages of cusp teeth
48
49. 49
Disadvantage of semi anatomic teeth
1. Less aesthetic (buccal cusp are shorter)
2. Less chewing efficiency (controversial:some claim greater)
50.
51. Advantage of cuspless oclussal schemes
More stable lower denture during mastication
More vertical chewing stroke
More shear in the chewing stroke
Disadvantage of cuspless occlusal schemes
Less stability to the upper denture
No balance in excursive glide
51
52. Advantage of 0 degree teeth
Easy to set up
Least lateral stress
Least anterior posterior interference after
settling
Best for patient with poor muscular control
Best for patient with poor ridge relationship
52
53. Disadvantage of 0 degree teeth
Very difficult to obtain balanced occlusion in
excursive movement
Less chewing efficiency especially for fibrous
or tough food
Poor esthetic
53