Anterior Teeth arrangement and selection of teeth

After the registration of the maxillo-mandibular , the artificial teeth must be set in centric occlusal position.

Selecting of artificial teeth

The facial form of the patient should be classified into-

square

ovoid

tapering

-The form of the teeth should be in harmony with the form of the face, square teeth are used for those with a square face and so on.

-In addition, the patient’s age, gender and personality should be taken into consideration when trying to improve to improve the appearance.

SELECTION OF ANTERIOR TEETH.. 1.LENGTH THE HEIGHT OF OCCLUSAL ...

-The color is also important, dark and opaque teeth should be selected for elderly patient, light and translucent teeth for the young patients.

-The size of the teeth must also be in harmony according to the size of the face and the gender of the patient.

Objectives of setting teeth are-

to provide a comfortable and atraumatic occlusion

to assist in preparing food for deglutition

to impart a pleasing and natural appearance

to assist in speech

Teeth arrangement of anteriors and posteriors

Armamentarium

•Maxillary occlusal rim with cast

• Mandibular occlusal rim with cast

• Mean value articulator

• Teeth shade

• Measurement scale

• Wax knife

• Roach carver

• Wax spatula

• Wax sheet

• Gas torch

• Cotton

• Rubber bowl with cold water

Guidelines for anterior teeth setting are marked on the cast and the land area of the cast.

I. The centre of the incisive papilla (marked in red)

II. A line is drawn along the midline of the cast through the centre of the incisive papilla (marked in black).

III. A perpendicular line is drawn to the above line through the centre ofincisive papilla till the land area (marked in blue; CPC line).

IV. During setting of maxillary canine, the cuspid tip of the canine should be placed in line with this point

The crest of the lower residual alveolar ridge is marked in red colour along the posterior aspect of the lower cast. A corresponding line is marked on the upper cast in blue

Steps in placement of maxillary central incisor

Placement of the maxillary central incisor in relation to all three planes.

🔻The long axis of the central incisor (the blue line) is positioned parallel to the
vertical axis (the red line) when viewed from the front

Front view

🔻The incisal edge of the maxillary central incisor is positioned in line with the
anterior occlusal plane . The central pin of the articulator will point the mesioincisal line edge of the central incisor.

Side view

🔻The central pin of the articulator will
point the mesioincisal line edge of the central incisor.

When viewed from:
Front: Long axis parallel towards the vertical axis.
Side: Slopes labially about 15 degrees.
Occlusal plane: Incisal edge is in contact with occlusal plane

Occlusal view

Steps in placement of maxillary lateral incisor

Front view

🔻The long axis of the lateral incisor (green line) is placed slightly inclined to
the vertical axis (red line).


🔻The incisal edge of the maxillary lateral incisor is placed slightly short of the
occlusal plane (marked as yellow line).

Side view

🔻The incisal edge of the maxillary lateral incisor should follow the outline of
the occlusal rim when viewed occlusally

Occlusal view

When viewed from:
Front: Long axis slopes towards midline at incisal edge.
Side: Slopes labially about 20 degrees.
Occlusal plane: Incisal edge is 1 mm short of occlusal plane

Steps in placement of the maxillary canine.

🔻The long axis of the maxillary canine (yellow line) should be parallel to the
vertical axis (red line) when viewed from the front.

Front view

🔻The long axis of the maxillary canine (yellow line) should be parallel to the
vertical axis (red line) when viewed from the side .

Side view

Maxillary canine follows the outline of occlusal rim, and the tip of the canine
corresponds to the canine papillary line

Occlusal view

When viewed from:
Front: Long axis parallel towards the vertical axis.
Side: Long axis parallel towards the vertical axis.
Occlusal plane: Cuspid tip is in contact with occlusal plane

Teeth setting of anterior teeth

Steps in placement of mandibular central incisors

From front
From side

🔻The incisal edge of the mandibular central incisor should follow the outline
of the occlusal rim, and the incisal edge of the mandibular central incisor tooth
should not cross over the land area when viewed occlusally

When viewed from:
Front: Long axis inclines slightly towards the vertical axis.
Side: Slopes labially.
Occlusal plane: Incisal edge is 0.5–1 mm above the occlusal
plane

Occlusal view

Steps in placement of mandibular lateral incisor

From front
The incisal edge of the mandibular lateral incisor should follow the outline
of the occlusion rim, and the incisal edge should not cross over the land area of
the cast when viewed occlusally

When viewed from:
Front: Long axis inclines towards the vertical axis.
Side: Slopes labially less than central incisor.
Occlusal plane: Incisal edge is 0.5–1 mm above the occlusal
plane

Occlusal view

Steps in placement of a mandibular canine

From front
From side
From occlusal view

When viewed from:
Front: Long axis inclined towards midline.
Side: Slopes lingually.
Occlusal plane: Cuspid tip is 0.5–1 mm above the occlusal
plane

Maxillary and mandibular canine relation

The mesial slope of the maxillary canine should overlap the distal slope of
the mandibular canine

Complete teeth setting of maxillary and mandibular anteriors

🛑The vertical overlap (over bite) between the maxillary and mandibular
incisal edge should be 0.5–1 mm, and the horizontal overlap (over jet) between
the maxillary and mandibular incisal edges should be 1–2 mm.

🛑The horizontal overlap should be uniform from left maxillary to right maxillary canine

Source – preclinical manual of prosthodontics S . Lakshmi

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s