Introduction to Prosthodontics

• Study notes below

Intro to Prosthodontics

• The portion of a natural tooth extending from its dentinoenamel junction to the occlusal surface or incisal edge is the anatomic crown.
• A full veneer crown is a restoration that covers all the clinical crown.
• Abutments are natural teeth supporting or attaching to a fixed or removable prosthesis.
• Retainers are parts of a fixed partial denture that attach the prosthesis to the abutment.
• A prosthesis replaces an absent part of the human body using an artificial component.
• Artificial replacement to restore facial function involves rehabilitating patients with defects or disabilities present from birth or developed due to disease/trauma.
• Removable prosthodontics involves replacing teeth and contiguous structures in edentulous or partially edentulous patients using artificial substitutes removable from the mouth by the patient.
• Fixed prosthodontics focuses on permanently attached dental prostheses.
• Pontics are artificial teeth replacing lost/missing natural teeth on a fixed partial denture, restoring function and occupying the space of the natural crown.
• In porcelain fused to metal jacket crowns, the metal framework should have a minimum thickness of 0.3mm.

Design of FPD

• Restoring normal function, biocompatibility, and acceptable esthetics is required for fixed prosthesis.
• A cantilever fixed bridge is supported by an abutment on one end only.
• In a 5-unit fixed bridge, a pier abutment refers to a free-standing middle abutment with a missing tooth on the mesial and distal sides.
• In a 5-unit fixed bridge, the pier abutment does not receive the least masticatory force during chewing.
• A cantilever fixed bridge is not indicated for restoring a missing permanent lower second molar.
• The abutment next to the cantilever component in a cantilever bridge does not receive the least stress during mastication.
• A pier abutment tooth is at risk of trauma from occlusion.
• Younger individuals have larger pulp chambers than older individuals.
• A cold test can check for vitality in a proposed abutment tooth.

Pre Examination

• In the temporomandibular joint, the retrodiscal tissue contains blood vessels, nerves, and lymphatics.
• Recommended degree of taper in each side of the radial wall preparation for the abutment tooth is 3 to 5 degrees.
• The thickest part of the articular disc of the temporomandibular joint is the posterior band.
• Chewing strokes represent the basic unit of mastication.
• Artificial replacement to restore facial function involves rehabilitating patients with defects or disabilities present from birth or developed due to disease/trauma.
• In porcelain fused to metal jacket crowns, subgingival is the preferred finishing line in the labial area.
• In porcelain fused to metal jacket crowns, supragingival is the preferred finishing line in the lingual area.
• Rotational forces involve two forces equal in dimension but opposite in direction applied on the tooth.
• Placing margins subgingivally in short abutment teeth like second molars can increase the retention of the jacket crown.
• A full veneer crown is a restoration that covers all the clinical crown.
• For porcelain fused to metal jacket crowns, tooth reduction in the lingual area can be 1 mm.
• The finishing line is the junction between the prepared and unprepared parts of the tooth surface.
• Calcium hydroxide seals the pulp from leakage and is the most important beneficial effect to the tooth pulp.
• Pontics are artificial teeth on a fixed partial denture replacing lost or missing natural teeth, restoring function and occupying the space of the natural crown.
• A chamfer margin can be prepared in the cervical of the labial surface of the upper left canine for porcelain fused to metal jacket crown.
• The articular disc of the temporomandibular joint is avascular.
• A chamfer margin can be prepared in the buccal of the lower second molar for porcelain jacket crowns.
• Retainers attach the prosthesis to the abutment in a fixed partial denture.
• A vertically oriented groove can be prepared on the buccal wall of abutment molar teeth to prevent jacket crown rotation.
• Removable prosthodontics involves replacing teeth and contiguous structures in edentulous or partially edentulous patients using artificial substitutes removable from the mouth by the patient.
• A chamfer is the most preferred margin for porcelain fused to metal jacket crowns in the lingual and palatal area.
• In progressive side shift bennette movement, the condyle in the contralateral side does not move medially without much forward movement.
• A tipping force is a single horizontally directed force on the tooth
• Thickness for cement space between the abutment and internal surface of the jacket crown depends on the particle size of the cement for final cementation.
• The isthmus represents the thinnest part of the articular disc of the temporomandibular joint.
• A shoulder is the most preferred margin for porcelain fused to metal jacket crowns in the labial area.
• Fixed prosthodontics is the prosthodontics area focused on permanently attached dental prostheses.
• The minimum margin width for most ceramic materials for porcelain fused to metal jacket crowns in the labial/buccal area is 1.2-1.3mm.
• The superior head of the lateral pterygoid muscle does not contract during mandibular opening.
• A pier abutment refers to a free-standing middle abutment with a missing tooth on the mesial and distal sides in a 5-unit fixed bridge.
• In porcelain fused to metal jacket crowns, the metal framework should have a minimum thickness of 0.3mm.
• Increasing the retention of the jacket crown utilizing undercuts in the radial wall of abutment teeth is false, even if the cervico-incisal length of the second molar abutment teeth is short.
• Equigingival is the most preferred finishing line in the lingual or palatal proximal area for porcelain fused to metal jacket crowns.
• Resin cement should be avoided in filling some cavities if filling a tooth abutment before tooth preparation and using resin cement to cement the jacket crown.
• Putting a cantilever bridge in the molar region is not advisable when restoring a missing second molar.
• The margin is the surface of the prepared part of the abutment tooth that will receive and fit with the cervical border of the jacket crown.
• The pier abutment tooth has a risk of having trauma from occlusion.
• There should not be a straight plane from cervical to incisal end of the tooth when doing a tooth preparation in the labial surface.
• A cantilever fixed bridge is not indicated to restore a missing permanent lower second molar.
• Young individuals have a bigger pulp chamber than older ones.
• Restoring normal function Biocompatibility, and acceptable esthetics are basic requirements of fixed prosthesis..
• Abutments are natural teeth used for the support or attachment of fixed/removable prostheses.
• The auriculotemporal nerve innervates the temporomandibular joint.
• During lateral jaw movement, the condyle on the contralateral side moves downward and forward in the glenoid fossa.
• A prosthesis replaces an absent part of the human body with an artificial part.
• The pier abutment in a 5-unit fixed bridge does not receive the least masticatory force during chewing especially.
• In immediate side shift bennette movement, the condyle in the contralateral side cannot move medially without much moving posteriorly.
• The longer the length of the connector cervico occlusally, the less flexible the fixed bridge will be.
• Subgingival is the most preferred finishing line in the labial proximal area when using a porcelain fused to metal jacket crown.
• The anatomic crown is the portion of a natural tooth that extends from its dentinoenamel junction to the occlusal surface/incisal edge.

These notes cover the basics of prosthodontics, including definitions of anatomic crowns, full veneer crowns, abutments, and retainers. It explains the role of prosthodontics in replacing missing teeth and restoring facial function. The notes also differentiate between removable and fixed prosthodontics.