Oxalic Acid Under Adhesive Restorations as a Means to Reduce Dentin Sensitivity: A Four-Month Clinical Trial

Abstract

Oxalic acid may offer a novel approach to improve the reduction of dentin postoperative sensitivity after placement of resin-bonded restorations. SUMMARYThe aim of this double-blind randomized controlled clinical trial was to evaluate the reduction of dentin sensitivity using an oxalatebased compound, placed under adhesive restorations, during a four-month period. One hundred three preoperatively sensitive teeth, on 36 patients aged 25 to 66 years (mean, 40.367), were included in the study. Group A (experimental) was treated with oxalic acid (BisBlock) before resin-based composite (RBC) restorations (n¼52), and group B (control) was treated with distilled water before RBC restorations (n¼51). The first tooth in each patient was randomly assigned to group A, and the second tooth received group B. Clinical evaluation was made by a thermal/ evaporation test with an air syringe and measurement by visual analog scale (VAS) at baseline and four months after treatment. The results showed sensitivity reduction during the evaluation period (expressed in VAS values): group A, 7.6 to 0.8; group B, 7.3 to 2.6. We concluded from this study that both treatments reduced dentin sensitivity during the

Treatments for hypersensitive noncarious cervical lesions

“…Results from a 2011 clinical study showed a significantly higher reduction in sensitivity with application of an oxalate before bonding. 38 However, authors of a critical review of the literature 62 and a critical summary 63 concluded that oxalates have not been proven effective in treating dentin hypersensitivity. Varnish also has been evaluated in reducing post–periodontal surgery root sensitivity.…”

“…Results from another study of the use of oxalic acid applied before a dentin-bonding agent (DBA) adhesive showed a significantly higher reduction in sensitivity compared with use of the DBA alone. 38 Missing from these studies were comparisons with a chemoactive dentifrice and with restoration, as well as longer-term outcomes (six months or more). The authors of the oxalic acid application study 38 noted that their results were contaminated by a strong placebo effect from a water rinse.…”

“…38 Missing from these studies were comparisons with a chemoactive dentifrice and with restoration, as well as longer-term outcomes (six months or more). The authors of the oxalic acid application study 38 noted that their results were contaminated by a strong placebo effect from a water rinse. The same strong placebo effect also was noted in a controlled study of a fluoride- containing mouthrinse for the reduction of dentin hypersensitivity.…”

Is Surgical Root Coverage Effective for the Treatment of Cervical Dentin Hypersensitivity? A Systematic Review

“…7 The approaches used in the treatment and prevention of CDH are tubular occlusion and/or the blockage of nerve activity. 4,8 Studies of adequate methodologic quality have been conducted to evaluate the effectiveness of laser therapy, 9,10 oxalates, 11,12 and agents at occluding dentinal tubules. 13,14 Surgical root coverage is another form of treatment for CDH and is classified as a soft-tissue pedicle graft and free softtissue graft.…”

Effect of dentin pretreatment with potassium oxalate: A 6‐year follow‐up

“…These agents promote the occlusion of dentinal tubules and reduce the movement of fluids within the tubules, with depolarization of the nerve endings leading to reduced sensitivity. However, with the exception for self‐etching adhesives, the use of these desensitizing agents before application of the adhesive system may have an adverse effect on the bond strength with dentin (Albuquerque et al, ; De Assis et al, ; Barrientos et al, ; Camilotti, Zilly, Busato, Nassar, & Nassar, ; Ding et al, ; Sartori, Lopes, & Vieira, ; Vora et al, ; West, Seong, & Davies, ).…”