Adhesion to Tooth Substrates and Dental Alloys by Methacrylates having a Naphthalic Anhydride Structure

Adhesion to tooth substrates and dental alloys by methacrylates having a naphthalic anhydride structure.

Three isomers of methacryloyloxyethyl naphthalenetricarboxylate anhydrides (MENTA-126, -236 and -184) were synthesized, and their adhesiveness to teeth and non-precious dental alloys was investigated. The MENTA resins initiated by TBB-O showed about 12-13MPa of the bond strength on treated enamel and 10-12.5MPa on treated dentin after 120 thermocycles, while, after the equal thermal cyclings, t...

4-[(E)-2-Ferrocenylethen­yl]-1,8-naphthalic anhydride

In the structure of the title compound, [Fe(C(5)H(5))(C(19)H(11)O(3))], the plane of the substituted ferrocene ring is tilted by 14.17 (6)° with respect to the mean plane through the naphthalene ring system. In the crystal structure, centrosymmetric dimers are formed through π-π inter-actions [centroid-centroid distance = 3.624 (2) Å] between the substituted ferrocene ring and the three fused r...

Allergic contact dermatitis in a dental nurse induced by methacrylates.

Allergy to acrylic plastics is rather frequent among doctors and dental technicians. A rare case of allergy to acrylates in a dental nurse (only one reports can be found in the literature) is presented. The patient reacted to eight chemical compounds of the group under study. UV-cured composites used in conservative dentistry for tooth filling was the source of allergy in the case under report.

Part I – Adhesion On Dental Substrates

Differential induction of cytochrome P450-mediated triasulfuron metabolism by naphthalic anhydride and triasulfuron.

Cytochrome P450 monooxygenases play paramount roles in the detoxification of herbicides as well as in the synthesis of lignins, flavonoids, and phenolic acids. Biochemical analysis of triasulfuron metabolism in maize (Zea mays) seedlings has demonstrated that the P450(s) responsible for detoxification of this herbicide is induced by naphthalic anhydride (NA), a plant safener, and by triasulfuro...