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At least 91 records · Page 5Linked to original sources
PubMed1985

The use of a soft denture liner for chronic residual ridge soreness.

Chronic residual ridge soreness in patients with complete dentures can be caused by various factors. A differential diagnosis between physiologic or anatomic problems (or both) and functional deficiencies in the patient's present dentures must be made. The functional deficiencies can often be eliminated easily, whereas physiologic and anatomic problems may be more difficult to correct, especially in the geriatric patient. If the functional deficiencies in the patient's dentures have been corrected and surgical procedures are not a viable alternative, placement of a long-term resilient liner can often resolve the chronic residual ridge soreness that is present in denture patients. Properly placed and properly cared for silicone or silicone rubber resilient denture liners can provide comfort for over 70% of patients with chronic residual ridge soreness for 3 to 5 years and often longer.

Chronic Disease↗
PubMed1980

The elastic modulus of soft denture liners.

Under certain circumstances, e.g., when treating "denture sore mouth" or after the provision of immediate dentures, dentures may be lined with soft rubberlike materials which have Young's moduli within the range congruent to 10(5) N m-2. Measurement of the compression modulus Ec of such soft liners is described and Gent and Lindley's method of calculating Young's modulus E was evaluated. It was established that the Young's modulus may be calculated using: Ec = E(1 + 2kS2), where k = 1 for soft rubbers, and for disks S is a shape factor and = radius/2 X thickness. It is also shown that Young's modulus is a linear function of log(rate of strain) for both tension and compression measurements. When gellation has occurred subsequent to mixing there is an increase in Young's modulus due to loss of ethanol. When immersed in brine the elastic modulus remains approximately constant from a day to a week or longer.

Denture Liners↗
PubMedDate not supplied

Changes in the masticatory function of complete denture wearers after relining the mandibular denture with a soft denture liner.

PURPOSE: The purpose of this study was to examine changes in the masticatory function of complete denture wearers after relining the mandibular denture with a soft liner. MATERIALS AND METHODS: Conventional complete dentures were fabricated for 6 completely edentulous patients. One month after completing adjustments of the dentures, maximum biting force, masticatory performance, and electromyography of the masseter muscle during mastication were recorded. Chewing strokes, chewing time, muscular activity, and masticatory rhythm were calculated using the recorded electromyography. The mandibular dentures were then relined with a soft liner. One month after finishing adjustments of the relined dentures, the same tests were performed. These values were compared using a paired t test (alpha = 0.05). RESULTS: When using the soft liner, masticatory performance and maximum biting force were significantly greater (P = 0.019 and P = 0.023, respectively). In addition, the number of chewing strokes was significantly lower (P = 0.020), and chewing time was reduced (P = 0.010). A more stable masticatory rhythm was also found in the initial chewing stage. The muscular activity tended to decrease after the insertion of the lined denture, but no significant difference was found between before and after relining. CONCLUSION: It was shown that applying a soft lining material to the mandibular dentures of 6 edentulous patients improved masticatory function with no adverse effect on the muscular task.

Acrylic Resins↗
PubMed1982

Use of a medical-grade silicone adhesive as a denture liner in the treatment of idiopathic oral mucosal irritation.

The results of the survey confirmed the clinical observation that soft liners were the best course of treatment in specifically selected patients. Most patients were satisfied with the appearance of the denture, and the length of time the patient could wear the soft-lined prosthesis increased considerably. The silicone liner also reduced irritation and increased the ability to chew food, with the patient's ability to taste food remaining essentially unaffected. The maintenance of cleanliness of the silicone, which had been a problem in the past, seemed to be markedly reduced. Above all, the enthusiastic patient acceptance of the product indicates that adhesive type A may be an excellent alternative to hard acrylic resin denture liners when a change of material is necessary.

Adhesives↗
PubMed1992

Bond strength and rupture properties of some soft denture liners.

The bond strength and rupture properties of three soft acrylic liners (Coe-Soft, Coe Super-Soft and Vertex Soft) and two silicone liners (Molloplast-B and Flexibase) were tested immediately after processing and following immersion in water at 37 degrees C for 7 and 90 days. The bond test gave variable results, as some materials partly peeled and then stretched until rupture occurred. After saturation the acrylic liners exhibited an increase in tear resistance, whilst silicone materials deteriorated, in the case of Flexibase to approximately 25% of its original value. Vertex Soft was the exception, as tear resistance decreased as water sorption increased. Scanning electron microscopy revealed indefinite demarcation between soft acrylic resins and hard denture base, which was not altered after saturation in water. On the other hand, the interface between denture base and silicone liners was clearly visible before and after saturation. The results indicated that denture soft liners had variable water sorption values depending on their basic structure, and some properties changed after immersion in water, a finding that is of relevance to prosthodontic practice.

Acrylic Resins↗
PubMed1998

The effect of accelerated aging on color stability of denture liners.

The objective of the present study was to determine the color changes resulting from the aging process in two cold and three hot curing soft liners and two hard liners. Seven samples were fabricated for each material. The initial color measurements were made with a UV-Visible Recording Spectrophotometer. The samples were then placed in an accelerated aging chamber to simulate the aging process. The color of the samples was then measured again with a colorimeter, and the color changes (delta E) were calculated. The critical mark of color change (delta E) has been quantified by the NBS. It was concluded that cold curing soft liners were not color-stable, and that hot curing soft liners and hard liners had similar color durability. These results suggest that colorants used in cold curing soft liners must be reinforced.

Biocompatible Materials↗