Relining, rebasing partial and complete dentures

Article Abstract:

Partial and complete dentures require occasional relining and rebasing for long-term function and esthetics. Relining resurfaces the side of the denture that contacts the gums. Rebasing is used to refit a denture by replacing or adding to the base material. The dental impressions that are used to make removable partial dentures (RPDs) cause the gums to move. As a result, new RDPs may not fit properly. An RPD that rocks toward the gums should be relined at initial placement. Over time, the bone and gum tissues change which alters the fit of an RDP. A reline performed at chairside or in the laboratory is needed. Rebasing is indicated when the resin denture bases degenerate or no longer extend into the gum reflection areas. Complete dentures require relinining or rebasing because of tissue changes caused by bone resorption. Most patients require relining or rebasing approximately five to eight years after initial placement of the dentures.

Maintenance and repair, Complete dentures

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Making better removable partial dentures

Article Abstract:

Dentists must update their knowledge about removable partial dentures (RPDs) and must use state-of-the-art techniques to produce high-quality RPDs. Properly-fitted RDPs begin with a preliminary impression that is used to prepare a diagnostic cast. Diagnostic casts are valuable tools that are underused. Light curing tray resins are the optimal material for the final RDP impression. While making the impression, the dentist should apply pressure to the soft tissues to simulate biting force. Border molding of the toothless areas will allow the RDP to adapt to the gums. A gypsum product, preferably improved stone, is used to make the final RDP cast. The dentist and the laboratory technician must communicate to develop a final plan for the RDP framework. The metal used in RDPs is most often a mixture of cobalt and chrome and the teeth should be made of wear-resistant resin. RDPs are expected to last between five and eight years.

Design and construction

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Abnormal occlusal conditions: a forgotten part of dentistry

Article Abstract:

Many dental patients have abnormal occlusal conditions that may not be treated. Abnormal occlusion occurs when all upper and lower teeth do not make contact at the same time. There are five conditions that involve abnormal occlusion: primary occlusal trauma, secondary occlusal trauma, clenching, grinding, and temporomandibular dysfunction (TMD). Primary occlusal trauma may occur when one tooth contacts the opposing tooth before the rest of the teeth in the arch. When combined with periodontal disease, this condition is called secondary occlusal trauma. Approximately one-third of all adults grind or clench their teeth, which causes excessive tooth wear. General dentists can treat abnormal occlusal conditions. Easy-to-make splints are appropriate for patients who grind or clench their teeth or have TMD. Dentists may need to grind the tooth surfaces in other patients to improve the relationship between opposing teeth.

Care and treatment, Malocclusion

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