Vitreous Enamels

New technology of Polyamideimide wire enamels

Polyamideimide coatings on magnet wire offer the best performance in chemical resistance and toughness. The thermal properties of polyamideimide coatings are also outstanding when compared to the cost of polyimide resins. Recent developments in polyamideimide resins are discussed and future trends-product offerings are also reviewed. Developments include corona resistance enamels, self-lubricat...

Evaluation of microleakage in human, bovine and swine enamels.

The suitability of bovine and swine teeth has been evaluated when they are used as substitutes for extracted human teeth in varied researches. This study evaluated in vitro the marginal microleakage in human, bovine and swine enamel. Cubic cavities (2 x 2 x 2 mm3) were prepared in enamel blocks from human, swine and bovine teeth. The cavities were filled with composite resin and conventional gl...

A Novel Artificial Vitreous Substitute – Foldable Capsular Vitreous Body

The natural vitreous is a transparent, gelatinoid structure occupying four-fifths of the volume of the eye. It has a thin, membrane-like structure corresponding to the vitreous cortex that extends from the ora serrata to the posterior pole.1 It is somewhat spherical but slightly flattened meridionally, and it has a cup-shaped depression in its anterior side. It consists of about 99% water by we...

Posterior hyperplastic primary vitreous.

A fundus picture of posterior hyperplastic primary vitreous based on a study of 14 cases is described. Its definition, in spite of pleomorphic manifestations, could be useful for its differentiation from other conditions affecting children's eyes and presumed to be caused by parasitic, inflammatory, fibroplastic, or genetically transmitted processes.

Fixed vitreous cyst.