Relines and Rebases - Kathryn A Young, LD

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Relines and Rebases


What are relines?

A reline is a procedure used to re-fit the surface of a denture to the tissues of the mouth. This is done by placing a new acrylic base into the denture, refitting the surface of the denture to the structures in the mouth. When a reline is done, we hope to bring back comfort, stability and discourage food from getting under the denture. With lower dentures this is often a difficult challenge and depending on the shape of your mouth, a reline may not eliminate the need for adhesive.

Relines are required for many reasons with the most common reason being what we call resorption of the ridge upon which the denture sits. Also thought of as shrinking of the bone and soft tissues. Bone resorption is caused by the normal process of aging or after natural teeth have been extracted and will continue throughout a person's life.
Generally the dental community believes that dentures should be relined once every 2 to 3 years. Relines are a normal part of denture maintenance and important to the health of the oral tissues and bone support of a denture.
A reline is not always recommended for a denture. If a denture has lost retention and the way the teeth come together has changed, a reline will not be enough to correct denture(s).

Types of Relines

A rebase is the process of refitting a denture by replacing the entire denture base. It is a more time consuming type of reline that changes both the inside and the outside of the denture.  This is done by taking a new impression inside the denture just like a reline. In the lab the procedure is quiet different as we completely remove the old acrylic and add a new acrylic base around the existing teeth. This service is recommended for dentures that have had multiple repairs, relines or when the base is inadequate to achieve comfort and fit. A rebase can be done on a denture with porcelain teeth but there is a risk that a back tooth might crack or if a pin is missing from a front tooth, it may not be held securely in place and require replacement.

A rebase is often done when a patient has had a denture inserted immediately after extractions and spent 3-18 months healing with soft relines in their denture (s). A cost effective approach to having a denture inserted immediately after extractions, maintained with soft relines then finally rebased provides an alternative to having two dentures fabricated.

Soft Reline

A soft liner is used mainly in full lower dentures and allows for more protection and comfort for people who have sensitive gums with little or no bone support.

The soft base is a liner that is bonded into your denture. Soft relines are most commonly used on lower dentures when the ridge upon which the denture sits does not tolerate pressure well. As resorption of the ridge progresses, it becomes more difficult to wear a lower denture and the pressure of the hard acrylic base can be very troublesome. The hope is to give the bone structure some cushion and ensure your denture will adhere better to what remains of your gum, be less irritating to your tissues and give your denture more stability. We will take an impression for the soft base and process it into the inside of the denture. The soft liner material is a bonded to the inside of your acrylic denture base. Soft liners will last approximately 18 months to 2 years and can create a maintenance issue.

Temporary Relines
A temporary reline, often called a tissue conditioner, is a silicone like material that lasts 1 to 4 months. It is used in dentures after someone has had their natural teeth extracted or to improve the health of their tissues before new dentures are made. We use these relines as a cost effective measure that assists in maintaining or improving the fit of the dentures. After these temporary soft relines are done, there will definitely be more work to do.

Direct Reline
A direct reline is also called a chair side reline. The direct reline material is inserted in the denture and sets in the mouth as the patient waits in the dental chair. The direct reline is offered in a hard or soft base, and are not meant as a long term solution to fit issues. It is rare for us to do one of these relines at Denture Designs, Kathryn is very holistic minded and does not like putting the chemicals needed for these relines in a person's mouth while they are actively changing. We work to protect patients from some of the harsh chemicals used in dental relines are respectful of a person's health.

Processed Reline
A processed reline is completed by taking an impression inside of the existing denture an creating a stone model in the lab, duplicating the shape of the mouth and all of its changes. This impression is then processed in our laboratory  and we keep your denture for about 3 hours. This is considered a permanent reline due to the high quality of material used and the precision of the fit achieved.

Remember: relines do not change the color or shape of the teeth or make them sharper for chewing. A reline replaces the fitting surface of the denture to make it fit better. A reline seldom cannot improve the balance of one denture to another if it is incorrect and a new denture may be considered.

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