Relining the Maxillary Complete Denture

Summary

This informative video from the University of Michigan School of Dentistry offers a comprehensive guide on relining dentures. It details the step-by-step process, from adjusting the occlusion and relieving undercuts to border molding and using rubber base impression materials. The video emphasizes the importance of precise adjustments, including checking for flaws, ensuring proper fit, and applying pressure-indicating paste. The final steps involve verifying occlusion, polishing the denture, and sending the case to the lab. This valuable resource supports the learning of oral healthcare professionals and is available under a Creative Commons license.

Takeaways

• 😀 Adjust the occlusion first when deciding to reline a denture.
• 😀 Relieve any gross undercuts on the tissue side of the denture with an acrylic burr to assist the lab during processing.
• 😀 Examine the borders of the denture in the patient's mouth and border mold with compound where needed.
• 😀 Pay special attention to the posterior border of the denture and check it with an indelible pencil.
• 😀 Drill a hole in the highest point of the vault of the denture using a number four or number eight round bur for light-bodied rubber base impression material.
• 😀 Apply rubber base adhesive over the tissue surface of the denture, extending slightly over the borders to the labial and buccal surfaces.
• 😀 Mix light-bodied rubber base accelerator and material in a 1:1 ratio and apply evenly to the denture, ensuring the borders are covered.
• 😀 Have the patient close into the accepted occlusion and maintain this position until the impression material has set, which typically takes 8 minutes.
• 😀 After the impression material sets, remove the denture and check for bubbles or flaws in the impression, and ensure the posterior border is reduced to the correct length.
• 😀 Use sticky wax to trace the outline of the posterior palatal seal and cover it with a layer of number four correcto wax before placing the impression back in the patient's mouth.
• 😀 After the correcto wax has flowed, confirm adequate retention of the impression; if retention is insufficient, apply more correcto wax until retention is achieved.
• 😀 Once the impression is finalized, send it to the lab for pouring and processing, avoiding pouring the impression in stone yourself.
• 😀 After receiving the denture from the lab, check the tissue surface for acrylic bubbles or flaws, remove any found, and check for correct fit with pressure-indicating paste.
• 😀 Continue refining the denture fit by checking and adjusting for interference and undercuts, reapplying pressure-indicating paste as needed until a proper seat is achieved.
• 😀 Finally, check and adjust the occlusion before polishing the denture and dismissing the patient.

Q & A

What is the first step when performing a reline on a denture?

The first step in performing a reline is adjusting the occlusion, ensuring the bite is correct before proceeding with further steps.

Why is it important to relieve any gross undercuts on the tissue side of the denture?

Relieving gross undercuts on the tissue side of the denture helps the laboratory when processing the denture, ensuring a better fit and more accurate results.

What should be done if the borders of the denture are too short?

If the borders are too short, they should be border-molded with compound material and checked again in the patient's mouth to ensure they fit properly.

Why is the posterior border of the denture given special attention?

The posterior border is crucial for ensuring a precise fit and proper seal. It should be checked with an indelible pencil to ensure it aligns correctly with the finished denture.

What material is used for the tissue surface impression, and how is it applied?

Light-bodied rubber base impression material is used. It is applied over the tissue surface of the denture and should cover slightly beyond the borders of the denture to ensure proper impression.

What happens after the light-bodied rubber base impression material is set?

Once the impression material has set, the denture is removed from the patient's mouth and checked for bubbles and flaws. If the impression is accepted, the posterior border is then trimmed to its predetermined length.

What is the role of sticky wax in the denture reline procedure?

Sticky wax is used to outline the posterior palatal seal on the impression. It helps to define the final shape of the denture and ensures an accurate fit when combined with other materials.

How is retention demonstrated in the posterior palatal seal?

Retention is demonstrated when the correct amount of wax flows and covers the posterior area. If retention is not demonstrated, more correct oak wax is applied until adequate retention is achieved.

What should be done after the denture is sent to the laboratory?

After sending the denture to the laboratory, the cast is poured, and the tissue side is examined for flaws. Once returned, any imperfections such as acrylic bubbles are removed.

How is the final fit of the denture confirmed?

The final fit is confirmed by applying pressure-indicating paste to the tissue side, ensuring there are no interferences or undercuts. The occlusion is then checked and adjusted, and the denture is polished before returning it to the patient.