This invention concerns a method of improving penetration of compositions to dentin, enamel, dental pulp or cement and dental compositions for restoration or decoration of teeth, for use in pulp medication comprising, for root canal disinfection and/or obturation and for desensitizing. This invention also concerns uses of DMSO for improving the bond strength of dental composition and in preparing dental compositions. Further the invention concerns a new method of treating teeth so that penetration of components is increased.
