Influence of lining design of three processed soft denture liners on cushioning effect

Abstract

The purpose of this study was to evaluate the influence of the lining design of a soft denture liner on its cushioning effect, using a free drop test and an accelerometer. The peak instantaneous acceleration value was computed. The materials tested were SuperSoft(R) (SS), Kurepeet-Dough(R) (KD), and Molloplast-B(R) (MB). Soft denture liners 2 mm in thickness were placed in test denture bases using three different configurations. Specimens were tested at 24 h and at 180 days after storage in distilled water at 37 degrees C. A three-way ANOVA was used to analyse the data (P=0.05) and Tukey intervals were computed. It was found that all three materials were effective in reducing the impact force. The lining design that had the soft denture liner extended to the periphery of the denture base demonstrated the greatest shock absorbability of all the tested designs. A silicone denture liner using lining design 1 was the most effective in reducing the shock transmitted to the denture bases.

Comparative Evaluation of Heat-Polymerized and Auto-Polymerized Soft Liners with Regard to Transverse Bond Strength, Peel Bond Strength and Water Sorption: An in vitro Study

“…Soft liners can be processed either by heat curing or by autopolymerization. Laboratory processed materials are used as longterm denture liners 28 for the management of sore or atrophied mucosa, traumatic ulceration and obturators. The desirable properties of the soft liners are high bond strength to the denture base, dimensional stability of the liner during and after processing, permanent softness or resilience, 29 low water sorption, color stability and ease of processing.…”

Peel strength of denture liner to PMMA and polyamide: laser versus air-abrasion

“…These liners act as shock absorbers in order to minimize and distribute the pressure on denture-bearing tissues, as well as to improve the intaglio denture surface 2,4-11. The use of soft lining material may be beneficial in promoting the success of complete dentures by enabling the dentures to withstand masticatory stress where the denture bearing tissues are comparatively intolerated 10,12-14. However, the use of soft denture liners is said to have several problems, among the most serious of which is adhesion failure between the soft denture and the denture base 2,9,11,12,15.…”

Bond Strength of Soft Lining Material to Polyamide Denture Material

“…Mollosil is a kind of soft lining material, which can be applied directly in the mouth in a short time and commonly used in the clinic, so Mollosil was chosed in this study. In line with the previous studies 17,29,30 tensile, shear and peel tests are widely accepted methods for evaluating the bond strength of soft lining materials to denture base. Tensile test was used in this study.…”

“…16 The use of soft lining material will be useful the success of complete denture to reduce the occlusal stress. [17][18][19][20] The major problem of soft liners is that the bonding and adhesion of denture base. 11,15,17,21.22 Depending on the replacement of soft denture liners from bases, increasing patient complaints and causing mouth sores.…”