47. Retainer-pontic connectors in bridge prostheses. Classification of fixed bridge restorations.
Explains the connector that joins a retainer to a pontic, comparing rigid and non-rigid types in a table and setting out rules for their size, shape and strength, with canine and ceramic connectors singled out. Goes on to classify fixed bridges by how the pontic is held, with a table of four designs, a diagram, and further groupings by size, material, site, support, retainers, technology and timing.
Topic 47 of 75 in the MU Sofia syllabus for Preclinics of Dental Prosthetics (Dental Medicine, Year 2). The free AceMed note covers it in 3 sections, about 122 words (2 min of reading), with 14 flashcards.
In this note
Introduction
Connectors
Classifying bridges
Introduction
The connector joins a retainer to a pontic. It looks small, but it carries much of the bridge's stress, and its type decides how the bridge behaves under load.
Connectors
Rules for connectors
Big enough to resist bending: height matters most; extend the connector lingually and toward the occlusal and labial surfaces as far as esthetics allows.
Shaped to leave open embrasures for cleaning, with no pressure on the papilla.
Canine connectors are made especially strong: they take vertical, horizontal, tensile and twisting forces.
Larger for weaker materials: ceramic connectors must be much bigger than metal ones.
Classifying bridges
By how the pontic is held
Other classifications
Rigid, one-piece castings are the strongest. Non-rigid connectors are a solution for special situations, not a routine choice.
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