Objective:To evaluate the effect of 2% chlorhexidine (CHX) and 30% proanthocyanidin (PA) application on the immediate and long-term bond strength of simplified etch-and-rinse adhesives to dentin.Materials and Methods:One hundred twenty extracted human molar teeth were ground to expose the flat dentin surface. The teeth were equally divided into six groups according to the adhesives used, either Tetric N Bond or Solobond M and pretreatments given either none, CHX, or PA. Composite cylinder was bonded to each specimen using the respective adhesive technique. Half the samples from each group (n = 10) were then tested immediately. The remaining samples were tested after 6 month storage in distilled water.Results:The mean bond strength of samples was not significantly different upon immediate testing being in the range of 8.4(±0.7) MPa. The bond strength fell dramatically in the control specimens after 6 month storage to around 4.7(±0.33) MPa, while the bond strength was maintained in the samples treated with both CHX and PA.Conclusion:Thirty percent PA was comparable to 2% CHX with respect to preservation of the resin dentin bond over 6 months.

Dental hard tissue is subject to variety of disorders. Dentinogenesis Imperfecta is one such disorder attributed to heredity. It is known to be an autosomal dominant trait. Teeth with such ‘imperfect’ dentin are liable to be weak and discolored. The disease has variable penetration and therefore can be expressed as a range of phenotypic manifestations from mild discoloration and chipping to frank attrition and multiple pulp canal exposures. Here we present a comparative study of a series of cases from different families of one topographical region with widely different presentation and histories that are characteristic of this disease.

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Cleidocranial dysplasia or mutational dysostosis or cleidocranial dysostosis is a generalized skeletodental dysplastic disorder, inherited in an autosomal dominant pattern. The expression of this disorder can vary widely in severity, even within the same family. This is a relatively rare disease and has no standard effective treatment option as of yet. Here we present a case report of affected mother and son with classical manifestations of the disease.