17 Questions
What is the main consideration for the buccolingual width of posterior teeth in complete denture prostheses?
To act as a table to hold food
How should the mesiodistal width of posterior teeth be determined for complete denture prostheses?
Depending on edentulous space available
What is the preferred occlusogingival height of posterior teeth for aesthetics in complete denture prostheses?
The largest possible vertical length without grinding
What is the standard cusp incline for anatomic posterior teeth in complete denture prostheses?
$33°$
What are non-anatomic posterior teeth in complete denture prostheses characterized by?
$0°$ cusp incline
What is the primary function of anatomic posterior teeth in complete denture prostheses?
Simulate occlusal surface
Which factor affects the ability to chew efficiently and achieve lateral and protrusive balance?
Malrelationship of jaws (class II & III)
What influences the shade of posterior teeth for aesthetic reasons?
Bulk
What is a crucial consideration when arranging teeth?
Ridge relation
What should be considered for the ideal arrangement of anterior teeth?
Central incisors should be placed parallel to the long axis of the patient's face
What is involved in setting up for class II and III jaw relations in lower posterior teeth?
Horizontal overlap and balanced occlusion
What influences protrusive balance in denture setup?
The anterio-posterior Curve of Spee
Which factor affecting balance in denture setup cannot be altered?
Condylar inclination
What is the primary determinant of cuspal inclination in teeth selection for dentures?
Selection of teeth
What technique involves recording the neutral zone in denture setup?
Neutral zone technique
What should be done to achieve protrusive balance with a steep condylar inclination?
Compensating curve with low cuspal inclination should be steeper
What is the purpose of trimming posterior teeth lingually in denture setup?
To provide space for the tongue
Study Notes
- Offer less resistance to horizontal forces: Bruxism, poor residual ridges, uncoordinated muscular movements, malrelationship of jaws (class II & III) can all affect the ability to chew efficiently and achieve lateral and protrusive balance.
- Tooth shade harmonization: The shade of posterior teeth should match the shade of the anterior teeth for aesthetic reasons. Bulk influences the shade of teeth.
- Tooth material selection: The choice of tooth material depends on the need for aesthetics and the availability of adequate interarch space. Options include resin, composite resin, acrylic resin, and porcelain.
- Teeth arrangement considerations: Anatomic landmarks, ridge relation, balanced occlusion, and neutral zone are all important factors to consider when arranging teeth.
- Ridge relation and tooth arrangement: Wax rim contours aid in tooth selection and placement. A proper occlusal vertical dimension and facial rim orientation are also crucial for lip support.
- Orientation of occlusal plane: The occlusal plane references should be aligned with upper and lower rims, taking into account the position of the lips and retromolar pad.
- Ideal arrangement of anterior teeth: Central incisors should be placed parallel to the long axis of the patient's face, with the midline of the dental arch being the center of the face. The orientation of the incisal edge and rotation on the long axis should blend with the face contours.
- Canines: The cervical end of the canine should be more prominent labially, and the canine is the turning point of the arch. The tip of the cusp should contact the occlusal plane.
- Lower anterior teeth: The central incisor long axis should be parallel to the vertical axis when viewed in the labial aspect, and the lateral incisor long axis should be parallel to the vertical axis when viewed from the labial aspect. The incisal level should be the same for both teeth, and the canine should be slightly above the horizontal plane.
- Limits to placing anterior teeth: The position of anterior teeth is limited by phonetics and esthetics. Long teeth can affect F and S sounds, and the arrangement of upper posterior teeth should be considered.
- Lower posterior teeth: The setup for class II and III jaw relations involves flattened cusps occluding, with large buccal horizontal overlaps. In class III relations, teeth may be arranged with a negative or reverse horizontal overlap.
- Balanced occlusion: After achieving centric balance, teeth arrangement is modified to achieve eccentric balance, requiring at least a semi-adjustable articulator. Posterior teeth should contact both on the working side and on the non-working side, with contact occurring between the mandibular buccal and maxillary palatal cusps on the non-working side.
Learn about the considerations for selecting the size, form, and shade of posterior teeth for complete denture prosthesis. This quiz covers the guidelines for buccolingual width and its impact on tongue space and facial aesthetics.
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