PRÓTESE PARCIAL REMOVÍVEL | ELEMENTOS CONSTITUINTES

Summary

In this video, Bruna, a dental student, introduces the concept of removable partial prosthesis (PPR). She explains that PPR is used to replace missing teeth while preserving remaining natural teeth. The video covers key components of PPR, such as direct and indirect retainers (like clasps and intracoronal retainers), major and minor connectors, the frame (célula), and artificial teeth. Bruna also discusses the importance of these elements in ensuring the stability, function, and aesthetics of the prosthesis. This video serves as a helpful overview for those looking to understand PPR in a simplified and engaging manner.

Takeaways

• 😀 The Partial Removable Prosthesis (PPR) is an artificial device used to replace missing teeth and tissues, but only partially, as the patient still has remaining teeth.
• 😀 A key feature of PPR is that it is removable, meaning the patient can take it out for cleaning and maintenance.
• 😀 Retainers play a crucial role in ensuring the prosthesis stays in place, with two main types: direct and indirect retainers.
• 😀 Direct retainers are located closer to the space where the prosthesis fits and are responsible for retaining the prosthesis in the patient's mouth. They can be either intracoronal (inside the crown) or extracoronal (outside the crown).
• 😀 Gramps, including circumferential and clasp types, are examples of extracoronal direct retainers that help in the retention and insertion of the prosthesis.
• 😀 The support arms, or opposition arms, of retainers help maintain balance by opposing the retention forces applied by the retention arm.
• 😀 The retention arm must be positioned below the equator of the prosthetic tooth to ensure proper retention, as above this line, it would create an expulsion force.
• 😀 Indirect retainers are positioned farther from the prosthetic space and prevent rotational movements of the prosthesis. They are primarily located on the opposite side of the denture's rotation axis.
• 😀 The conector major is the largest part of the PPR, responsible for connecting different components of the prosthesis. It must be rigid to ensure proper force distribution and prevent overload on the supporting teeth or tissue.
• 😀 The PPR's cell is the metal or plastic framework that holds the artificial teeth, which restores both the aesthetic and functional aspects of the dentition, including mastication and speech.

Q & A

What is a removable partial denture (PPR)?

A removable partial denture (PPR) is a dental prosthetic used to replace missing teeth while the patient still has some natural teeth remaining. It is designed to be removable by the patient, allowing for proper oral hygiene.

What are the key components of a PPR?

The key components of a PPR include direct retainers (such as crowns and clasps), indirect retainers, major connectors, minor connectors, the denture base, and artificial teeth.

What is the role of direct retainers in a PPR?

Direct retainers are responsible for retaining the prosthesis in the patient's mouth. They help maintain the prosthesis in place during insertion and prevent it from moving by gripping the remaining natural teeth.

What is the difference between direct retainers that are extracoronal and intracoronal?

Extracoronal direct retainers, like clasps (e.g., circumferential or bar clasps), are located outside the crown of the tooth, whereas intracoronal retainers involve preparing the tooth to fit a more stable, less visible component, typically a male-female clasp.

Why is the position of the clasp’s retentive arm important?

The retentive arm of the clasp should be positioned below the 'equator' of the tooth to ensure proper retention. This helps in gripping the tooth effectively and preventing the prosthesis from dislodging.

What is the function of indirect retainers in a PPR?

Indirect retainers prevent rotational movements (bascillation) of the prosthesis, stabilizing it further. They are typically placed in areas opposite to the primary retainer, often near the edentulous spaces.

What are major connectors in a PPR?

Major connectors are the primary rigid elements that join the components of the prosthesis together. They distribute functional forces across the prosthesis and connect the upper and lower arches.

What is the significance of a rigid major connector?

A rigid major connector is crucial for evenly distributing the forces exerted on the prosthesis, preventing overloading on the remaining teeth or the mucosa. A flexible connector could lead to discomfort or damage.

How do minor connectors function in a PPR?

Minor connectors link the various parts of the PPR, such as connecting the clasp to the major connector or the artificial teeth to the base. They ensure that the forces applied to the prosthesis are spread out.

Why are artificial teeth important in a PPR?

Artificial teeth restore the patient’s ability to chew and speak properly. They also improve the patient's appearance by filling in gaps left by missing teeth. These teeth are made of durable materials like porcelain or acrylic resin.