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Results for “Denture Rebasing”

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At least 559 records · Page 31Linked to original sources
PubMed1997

An alternative treatment: Molloplast B.

The extremely resorbed edentulous mandible has always presented difficulties for the dentist and patient. This paper describes the use of a heat-cured soft liner to aid in patient comfort. The liner has other applications, notably with cleft palate and oral cancer patients.

Denture Liners↗
PubMed1995

Hardness of denture reline materials polymerized with different techniques.

Two kinds of hard type self-cured denture reline materials were polymerized using three different techniques: (1) on a surface of glass plate, (2) under water, (3) under water with some hardening agent. Hardness of specimens were measured longitudinally during three weeks periods of storage in water at 37 degrees C. Results of our study indicated that the specimen cured with the special hardening agent showed the higher hardness than those cured only in water. Most of the hardness changes took place during first three days of the experiment period.

Acrylic Resins↗
PubMedDate not supplied

Flexural strength at the proportional limit of a denture base material relined with four different denture reline materials.

This study evaluated the resistance to plastic deformation under a flexural load (PLf) of a denture base material relined with four different types of denture reline materials. A heat-processed poly(methyl methacrylate) denture base was relined with varying thicknesses of denture reline materials and subjected to a flexural load. The flexural load at the proportional limit (PLf) was recorded. The PLf of the bulk denture base and denture reline materials were also measured for comparison. All relined denture bases showed significantly lower PLf than the bulk denture base. Generally, the PLf of the reline-denture base composite progressively decreased with an increasing proportional thickness of the reline material.

Analysis of Variance↗
PubMedDate not supplied

Effect of water sorption on the resistance to plastic deformation of a denture base material relined with four different denture reline materials.

PURPOSE: The effect of water sorption on the flexural strength at the proportional limit (FSp) of a denture base material relined with four different denture reline materials was studied. MATERIALS AND METHODS: Denture base specimens were relined either after 24 hours or 30 days of water immersion. The relined specimens were tested after another period of 24 hours or 30 days of water immersion. RESULTS: Relined denture specimens generally exhibited lower FSp with an increase in water immersion time and an increase in the thickness of the reline material. CONCLUSIONS: The plasticizing effect of absorbed water molecules explains the general decrease in FSp of immersed relined specimens. The absence of a significant effect that water immersion had on some relined specimens under certain immersion conditions was explained by water sorption into the denture base achieving an equilibrium after a period of water immersion, and the resistance of some reline materials to the effect of water immersion.

Analysis of Variance↗
PubMedDate not supplied

The flexural strengths of denture base acrylic resins after relining with a visible-light-activated material.

PURPOSE: Previous studies disclosed the ability of a light-activated denture reline material to strengthen a particular denture base material. The present study investigated the ability of the reline material to strengthen denture base materials processed by other means. MATERIALS AND METHODS: Four denture base materials were tested for flexural strength at proportional limit (FSpl) with or without being relined. RESULTS: The reline material maintained the FSpl of the microwave-processed and the autopolymerizing denture base materials. It increased the FSpl of the heat-processed and the light-activated denture base materials. CONCLUSION: the light-cured reline material increased the flexural strengths of the heat-processed and the light-activated denture base materials and maintained those of the microwave-processed and the autopolymerizing denture base materials.

Acrylic Resins↗
PubMed1976

[On the function-improving effect of rebasing].

The authors studied the rebasing technique of lower full dentures. For this purpose, they used the phonetic impression method according to the integral technique of Devin. From the results obtained it is concluded that the rebasing technique may be considered a rational, highly functional method.

Aged↗
PubMed1994

Management of the maxilla after alveolar ridge augmentation with hydroxylapatite when opposed by mandibular implants.

Maxillary ridge augmentation and vestibuloplasty are often adjuncts to mandibular implant reconstructions. Careful management of the augmented ridge after surgery is critical to the success of the maxillary prosthesis and osseointegration of the mandibular implant. A technique is described for alteration of an existing maxillary complete denture after ridge augmentation. Precautions regarding prosthesis function during the osseointegration phase of different types of mandibular reconstructions are noted. Technique and rationale for denture flange modification when a prosthesis is rebased for a patient who received simultaneous vestibuloplasty and ridge augmentation are described.

Alveolar Bone Loss↗
PubMed1992

Swallowing activity of lip muscles in patients with a complete upper and a partial lower denture.

In 30 partially edentulous subjects provided with an immediate complete upper and a partial lower free-end denture the lip activity in swallowing was studied before and after denture treatment and during a 2-year period of denture wearing. Electromyographic recordings of the right side upper and lower orbicularis oris, mentalis and anterior temporal muscles were obtained during swallowing saliva and during swallowing of water with and without the dentures in the mouth. In the different types of swallows recorded, the lower lip and mentalis muscles showed much stronger activity than the upper lip and anterior temporal muscles and also initiated the swallowing activity. No significant changes in mean voltages of the swallowing activity were observed during the 2-year observation period. On the other hand, the durations of the swallows showed marked increases after 1 year of denture use, when no further rebasings of the complete upper denture had been made.

Adult↗
PubMed2001

Clinical evaluation of a chemically cured hard denture relining material.

The purpose of the current study was to evaluate the clinical performance of a chemically cured denture relining material after 1-year service period. A powder-liquid material designed for denture base relining (Tokuso Rebase Normal-set, Tokuyama Corp., Tokyo, Japan.) was assessed. Fifty adult patients, who required denture reline treatment, participated in the current project. Adaptation of each denture was examined with a silicone elastomeric material, and the surface to be relined was reduced by means of a rotary cutting instrument, then conditioned with dichloromethane. The relining material was spatulated, poured into the relining area, inserted and adjusted after setting. Each relined denture was subjected to base line evaluation immediately after relining and end evaluation after 1 year. Standardized criteria were used for direct evaluation of the material. After an observation period of 1 year, the rate of the relining cases considered to be in clinically ideal condition (Alfa) was 90% for staining, 90% for discoloration, 94% for peeling, 96% for adaptation and 100% for irritation to oral tissue. Only one case was judged as clinically unacceptable (Charlie), and this was for staining. On the basis of a 1-year observation, the Tokuso Rebase material is considered to be a clinically reliable hard denture relining agent.

Adult↗
PubMed1994

Leaching and cytotoxicity of formaldehyde and methyl methacrylate from acrylic resin denture base materials.

Acrylic resin dentures have the potential to elicit irritation, inflammation, and an allergic response of the oral mucosa. Studies of substances leachable from acrylic resins, their cytotoxicity to cultured cells, and means of reducing their leaching were systematically conducted. Under in vivo and in vitro conditions, formaldehyde and methyl methacrylate were significantly leached into human saliva and saliva-substitute buffer, especially from autopolymerized resins. Both leachable substances showed cytotoxic potentials in the range of their leaching concentrations. Formaldehyde was cytotoxic at lower concentrations than methyl methacrylate. Preleaching in water reduced subsequent leaching of both formaldehyde and methyl methacrylate, and the amount of reduction depended on an increase in the preleaching temperatures. Immersion of acrylic resin dentures in hot water (50 degrees C) before insertion is recommended, especially for autopolymerized resins used either for rebasing or as denture base materials, to minimize the risk of adverse reactions in patients who wear acrylic resin dentures.

Cell Count↗
PubMed1990

[Waterbed lining of dentures].

The necessity of proper fit and various methods of correction of defective fit of full dentures are discussed. The construction and application of a waterbed lining at the mucosal side of a denture is given and arguments are presented why such a 'continuous rebasing' construction eliminates a series of disadvantages of the existing lining systems and offers several additional advantages to the functioning of a denture.

Denture Liners↗