Selection and arrangement of artificial teeth for normal cases and modified cases that need special ways in teeth setting and the common errors in teeth setting that may be done by beginners and how to fix them

1. Presented by
Rusul N (Assistant Lecturer)
Aseel A AL (Lecturer)
Karbala university collage of dentistry

2.  Objectives in teeth selection
 1-function well.
 2-alow the patient to speak normally.
 3-esthetically pleasing.
 4-will not abuse the tissues over the residual ridge.
 The selection of artificial teeth for complete denture
can be divided in two parts
 Anterior teeth are primarily selected to satisfy esthetic
requirements
 Posterior teeth are primarily selected to satisfy
masticatory requirements / occlusion .

3.  Factors to be considered when pre-extraction
records are not available:
Shade: is the degree of darkness of a color.
Factors affecting shade selection:
1- age :
2-Patients complexion: color of the skin, hair & eye
3- patient preference(method of pair comparison):

4. 2- Size:
1-width
2-length
1-Size of the face: bizygomatic
width
2- size of the arch

5. 3-location of canine eminences
or buccal frenum
4-width of the nose:
5-maxillary mandibular relation:
6-the contoure of the residual
ridge:
7- the vertical distance between
ridges:

6. 8-the lips:

7. Form of the anterior teeth:
1-Shape of the patient face or facial form: square, taper,
ovoid, combination
2-Age, sex, personality

8. Objective of anterior teeth setting:
1-Lip support
2-phonetic
3- esthetic

10. Esthetic

11. Cast Landmark

16. selection &arrangement of
posterior teeth
1-shade(color)
2-buccolingual width
3-mesiodistal length

18.  Advantages of cusp form teeth
Advantages of non-cusp form teeth

19.  Arrangement of posterior teeth
Correct placement of posterior teeth is important for the
retention & stability of both dentures.

20. 1-Curve of spee: .
2-Compensating curve:
4-Curve of Wilson(lateral curve)
3-Christensen's phenomenon

23. The common errors that occur during the
arrangement of
artificial teeth for complete dentures are grouped
under
two broad categories:
1. Inter-arch errors
2. Intra-arch errors
The intra-arch errors can further be classified into
•Errors exclusive for maxillary arch
• Errors exclusive for mandibular arch
• Errors common to both the arches.

24. Inter-arch Errors
The most commonly occurring inter-arch errors are as
follows:
• Cross-bite
• Increased or decreased horizontal overlap
• Increased or decreased vertical overlap
•Midline shift
• Edge-to-edge contact of anterior teeth.

25. Intra-arch Errors
• Errors exclusive for maxillary arch
• Errors exclusive for mandibular arch
• Errors common to both the arches.

26. Errors Exclusive for Maxillary Arch
• Failure to establish the occlusal plane
• Asymmetrical arch form
• Placing the teeth on maxillary tuberosity
• Placing the incisors on the incisive papilla.
The errors that occur in the mandibular arch are:
•Labial/lingual tilt of mandibular anterior teeth
• Violation of Pound’s triangle in posterior teeth.

27. Errors common to both the arches are
•Failure to make canines turning point of the arch
•Changing the sides of the teeth
•Crowding of anterior teeth while arranging posterior teeth
• Spacing between the teeth

28. Thank you