جستجوی مقالات مرتبط با کلیدواژه "soft liners" در نشریات گروه "پزشکی"

This study evaluated the effects of incorporating 1% and 2% cinnamon oil into a soft liner on the growth of Candida albicans colonies and the material's hardness. Thirty soft liner specimens were prepared for the disk diffusion and thirty for the hardness test.  In each test, the specimens were divided into three subgroups based on the concentration of cinnamon oil: A) 0% (control), B) 1%, and C) 2% by weight. Cinnamon oil was added to the monomer of a heat-polymerized soft liner. C. albicans was cultured on Mueller-Hinton agar, and the diameters of the inhibition zones around the specimens were measured. The Shore A hardness test was conducted using the Shore durometer. Statistical analysis was performed by the independent t-test, one-way ANOVA, and Tukey post-hoc test (α=0.05). The control group showed no inhibition zone. The specimens in Group C exhibited a significantly larger inhibition zone (16.72 ± 0.82 mm) than Group B (12.56 ± 0.82 mm; P < 0.001). The hardness values differed significantly among groups (P < 0.001). Group C demonstrated the highest hardness (48.54 ± 0.95), significantly greater than both Groups B (47.13 ± 0.72; P < 0.05) and A (45.23 ± 0.73; P < 0.05). Adding cinnamon oil improved the antifungal activity and hardness of the soft denture liner. Adding 2% cinnamon oil increased the hardness values to the upper limit of clinical acceptability. Therefore, the 1% concentration is recommended to balance antimicrobial efficacy and maintain optimal mechanical properties of the soft liner.

Background. The aim of the present study was to evaluate the effect of Corega and 2.5% sodium hypochlorite cleansing agents on the shear and tensile bond strengths of GC soft liner to denture base.
Methods. A total of 144 samples (72 samples for tensile and 72 for shear bond strength evaluations) were prepared. The samples in each group were subdivided into three subgroups in terms of the cleansing agent used (2.5% sodium hypochlorite, Corega and distilled water [control group]). All the samples were stored in distilled water, during which each sample was immersed for 15 minutes daily in sodium hypochlorite or Corega solutions. After 20 days the tensile and shear bond strengths were determined using a universal testing machine. In addition, a stereomicroscope was used to evaluate fracture modes. Data were analyzed with one-way ANOVA, using SPSS 16.
Results. The results of post hoc Tukey tests showed significant differences in the mean tensile and shear bond strength values between the sodium hypochlorite group with Corega and control groups (P=0.001 for comparison of tensile bond strengths between the sodium hypochlorite and control groups, and PConclusion. Immersion of soft liners in Corega will result in longevity of soft liners compared to immersion in sodium hypochlorite solution and sodium hypochlorite solution significantly decreased the tensile and shear bond strengths compared to the control and Corega groups.