Tensile bond strength of fluorosed Kenyan teeth using the acid etch technique. 1986

G N Opinya, and C H Pameijer

Tensile bond strength tests were performed on 120 enamel specimens equally distributed over 'normal' American, 'normal' Kenyan and fluorosed Kenyan teeth. The mean tensile bond strength for American teeth was 59.08 +/- 15.81 kg/cm2, for normal Kenyan teeth 41.52 +/- 14.64 kg/cm2 and for fluorosed Kenyan teeth prior to removing the surface layer 49.20 +/- 17.67 kg/cm2. There was an increase in the adhesive bond strength for fluorosed teeth after first grinding and polishing with a green stone followed by pumice (58.84 +/- 20.65 kg/cm2). The coefficients of variation were 27% for fluorosed Kenyan teeth prior to grinding and 35% after grinding. The tested etching times varied from 60 to 150 s. The normal Kenyan teeth had the lowest tensile bond strength. This may have been due to the inability to etch adequately these teeth in 60 s. The increase in tensile bond strength indicates removal of the surface layer of fluorosed enamel by grinding then acid etching may improve the bond strength.

UI MeSH Term Description Entries
D007630 Kenya A republic in eastern Africa, south of ETHIOPIA, west of SOMALIA with TANZANIA to its south, and coastline on the Indian Ocean. Its capital is Nairobi. Republic of Kenya
D009050 Fluorosis, Dental A chronic endemic form of ENAMEL HYPOMINERALIZATION caused by drinking water with a high fluorine content during the time of tooth formation, and characterized by defective calcification that gives a white chalky appearance to the enamel, which gradually undergoes brown discoloration. (Jablonski's Dictionary of Dentistry, 1992, p286) Dental Fluorosis,Mottled Enamel,Mottled Teeth,Dental Fluoroses,Fluoroses, Dental,Enamel, Mottled,Mottled Enamels,Teeth, Mottled
D001840 Dental Bonding An adhesion procedure for orthodontic attachments, such as plastic DENTAL CROWNS. This process usually includes the application of an adhesive material (DENTAL CEMENTS) and letting it harden in-place by light or chemical curing. Bonding, Dental,Cure of Orthodontic Adhesives,Curing, Dental Cement,Dental Cement Curing,Orthodontic Adhesives Cure
D003188 Composite Resins Synthetic resins, containing an inert filler, that are widely used in dentistry. Composite Resin,Resin, Composite,Resins, Composite
D003743 Dental Enamel A hard thin translucent layer of calcified substance which envelops and protects the dentin of the crown of the tooth. It is the hardest substance in the body and is almost entirely composed of calcium salts. Under the microscope, it is composed of thin rods (enamel prisms) held together by cementing substance, and surrounded by an enamel sheath. (From Jablonski, Dictionary of Dentistry, 1992, p286) Enamel,Enamel Cuticle,Dental Enamels,Enamel, Dental,Enamels, Dental,Cuticle, Enamel,Cuticles, Enamel,Enamel Cuticles,Enamels
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000134 Acid Etching, Dental Preparation of TOOTH surfaces and DENTAL MATERIALS with etching agents, usually phosphoric acid, to roughen the surface to increase adhesion or osteointegration. Dental Acid Etching,Etching, Dental Acid
D013718 Tensile Strength The maximum stress a material subjected to a stretching load can withstand without tearing. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed, p2001) Strength, Tensile,Strengths, Tensile,Tensile Strengths

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