Selection of teeth / fixed orthodontics courses

SELECTION OFSELECTION OF
TEETH FORTEETH FOR
COMPLETECOMPLETE
DENTUREDENTURE
PROSTHESISPROSTHESISINDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com

Teeth selection for complete denture
is best understood if the anterior teeth are
considered separately from the posterior
teeth. The anterior teeth are primarily
selected to satisfy esthetic requirements,
whereas posterior teeth are selected to
satisfy masticatory requirements.

ANTERIOR TEETH
a.SIZE OF THE ANTERIOR TEETH
Anatomic entities used as a guide for anterior
teeth size:
1.Size of the face:
Width of the central incisor = one sixteenth of
the bi-zygomatic width of the face.
Combined width of the six anterior teeth = slightly
less than one third of the bizygomatic breadth of
the face.

2. Size of the maxillary arch – the distance between
the incisive papilla and the hamular notch on one side
is added with the distance between two hamular
notches. This gives a combined width of all anterior
and posterior teeth of the maxillary arch.

3. Incisive papilla and the canine eminence – the
combined width of the six anterior teeth is equal to the
length of a line drawn on the cast at the distal
termination of one canine eminence to the other.
Intra-orally, the patient is requested to relax with
the lips touching. A mark is made at the corners of the
lips. The distance between the two marks on either
side is equal to the combined width of all the anterior
teeth.

4. Maxillo-Mandibular Relation – Any disproportion in
the size between the maxillary and mandibular arches
influences the length, width and position of the teeth. If
mandible is protruded; anterior teeth are larger, if
mandible is retruded; anterior teeth are smaller.
5. Contour of the residual ridge – teeth should be
placed in relation to follow the contour of the residual
ridges that existed when natual teeth were present.

6. Vertical distance between the ridges – according to
the available inter-arch space length of the teeth can
be selected. Minimal of the denture base should be
visible in the final prosthesis.
7. Lips – During relaxed state the labial surface of the
maxillary anterior teeth support the upper lip. When
the teeth are together the incisal edge of the maxillary
incisors supports the superior border of the lower lip

FORM OF THE ANTERIOR TEETH
Factors governing the form of the anterior teeth:
1.Form and contour of the face: from the frontal
aspect the shape of the face can be classified as –
 Square
 Square tapering
 Tapering
 Ovoid

From the lateral aspect the facial profile can be
classified as:
Straight
Concave
Convex
Form of the artificial anterior teeth should
conform to the form of the face.

2. Sex: Curved features are associated with
feminity and square features are associated with
masculanity. Teeth selected for females are more
ovoid or tapering; whereas for males are more
squarish, and sharp edged.
3. Age: Aging process affects the entire masticatory
apparatus in general including the teeth. Teeth
wear at the incisal edges, labial surface becomes
more flatter and outline appears more squarish.

SELECTION OF POSTERIOR TEETH:
Factors of selection – size, number, form and shade.
1. Form of the posterior teeth: The occlusal form of
the posterior teeth is of primary concern. The proximal,
buccal, lingual should be contoured so that they will
feel natural, masitcate food, and arranged in suitable
contact.
Cusp form of teeth are used if balanced
occlusion is being developed. If posterior teeth are
expected to disocclude in eccentric jaw movements
either the cusp form or monoplane teeth can be used.
If the posterior teeth are to be arranged in
neutrocentric occlusion monoplane teeth are selected.www.indiandentalacademy.com

SELECTION OF POSTERIOR TEETH:
Factors of selection – size, number, form and shade.
1.Size and number of posterior teeth:
 Must support the cheek, tongue during rest and
function.
 Buccolingual dimension of the artificial teeth
should be less than the natural teeth
 Anterioposterior dimension of posterior teeth is
determined by the length of edentulous span
extending from distal of the cuspid to the
ascending ramus of the mandible (just short of
the reteromolar papilla)www.indiandentalacademy.com

SELECTION OF POSTERIOR TEETH: (cont’d)
2. Form of the posterior teeth: The occlusal form of
the posterior teeth is of primary concern. The proximal,
buccal, lingual should be contoured so that they will
feel natural, masitcate food, and arranged in suitable
contact.
Cusp form of teeth are used if balanced
occlusion is being developed. If posterior teeth are
expected to disocclude in eccentric jaw movements
either the cusp form or monoplane teeth can be used.
If the posterior teeth are to be arranged in
neutrocentric occlusion monoplane teeth are selected.

Shade of the artificial teeth:
Should be in harmony with surrounding
structures – skin, hair, and eyes.
Shade selection should be done under natural
light, with the patient positioned in upright postion
and atleast six to eight feet from the dentist.
Canine usually is darker than the anteriors.
Posterior teeth should be in harmony with the
anterior teeth.
Premolar tooth is critical for esthetics. If being
arranged for esthetics premolar should be lighter
than the remaining posterior teeth.www.indiandentalacademy.com

Composition of material of artificial teeth
Acrylic
Porcelain – vacuum or air fired.

Selection of teeth / fixed orthodontics courses

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