Dentin Sensitivity

Abstract: Dental hygienists frequently encounter clients who present with one or several sensitive teeth These clients often rely on the dental hygienist to help determine the cause and to provide supportive treatment to relieve their discomfort Therefore, it is essential for dental hygienists to fully understand the complexity of dentin sensitivity, be well informed about treatment approaches, and have an appreciation of the difficulties inherent in designing and conducting clinical hypersensitivity trials Difficulties in designing hypersensitivity research have precluded a definitive answer concerning a best treatment approach The purpose of this course is to present dental hygienists with current information about the pain of sensitive teeth and the associated differential diagnosis The theory of pain transmission, etiology of dentin sensitivity, professional and self-care treatment modalities, and natural remission of tooth sensitivity will be discussed Tooth and pulp biology will be reviewed as a means of explaining treatment and management approaches At completion of this course, as measured by a post-test, participants with be prepared to apply the knowledge gained to their evidence-based practice to positively impact the oral health of their clients

Abstract: This investigation was conducted to evaluate the effect of chlorhexidine, sodium fluoride, and sequential rinses of chlorhexidine (Cx) and sodium fluoride (NaF) on dentin hypersensitivity. Forty-four adult patients with dentin hypersensitivity on three teeth were randomly assigned to receive one of four treatment rinses: (1) placebo; (2) 0.12% Cx; (3) 0.2% NaF; or (4) 0.12% Cx plus 0.2 NaF. Patients' responses to cold stimulation were recorded at baseline, two weeks, and four weeks. Pain response was quantified by applying successively decreasing temperature intervals of water (20 degrees C, 15 degrees C, 10 degrees C, 5 degrees C, and 0 degrees C) to exposed dentin. Plaque Index (Silness and Loe) was recorded at baseline only. Data on dentin sensitivity over time were analyzed using a repeated measures ANOVA. This ANOVA was conducted to generate an error term for calculation of Dunn's multiple mean comparison test. A Spearman rank order test was computed to assess correlation between plaque and hypersensitivity at baseline. Results showed the Cx and NaF rinses alone significantly reduced hypersensitivity (p less than .01) at four weeks compared to baseline. Sequential Cx and NaF rinses significantly decreased sensitivity (p less than .01) at both the two- and four-week intervals compared to baseline. At the four-week interval, the sequential Cx/NaF rinse group showed a significantly greater reduction (p less than .01) in hypersensitivity response when compared to placebo. Cx alone, or NaF alone groups. A moderate, positive correlation (r = 0.55) was demonstrated between plaque and dentin hypersensitivity. This was statistically significant at the (p less than .05) level.

Abstract: Aim Cervical dentin hypersensitivity (CDH) is defined as an acute pain of short duration that occurs in dentin exposed to the oral environment. The aim of this study was to evaluate the effi cacy of three desensitizing toothpastes (Sensodyne® Rapid-Relief, Colgate® Sensitive Pro-Relief, Nano P®) for immediate and intermediate-term relief of CDH, when compared with a control toothpaste (Cocorico®). Materials and methods Eight patients were enrolled in this clinical study. One hundred thirty-eight hypersensitive teeth were randomized into four groups according to the com- position of the desensitizing toothpaste tested: Group I) strontium acetate and calcium carbonate; II) calcium carbonate and arginine 8%; III) calcium phosphate nanoparticles; and IV) a control toothpaste. A split mouth design was used for one application each of the desensitizing dentifrices. Assessment of CDH was done by evaporative and cold stimuli at baseline, immediately, 24 hours and 30 days after the treatment. Results The toothpastes presented similar effectiveness and statistically significant improvement in 30 days compared to baseline. Group III showed statistically significant relief for cervical dentin hypersensitivity immediately after the treatment. Conclusions The only toothpaste that presented immediate relief effect was the paste containing calcium phosphate nanoparticles in the form of hydroxyapatite.

Abstract: Objectives To study the effectiveness of a dentifrice containing polyvinylmethyl ether-maleic acid (PVM/MA) copolymer in occluding dentin tubules and investigate the interaction between PVM/MA and type I collagen using surface plasmon resonance (SPR).