Abstract: The invention concerns a dental implant or prosthetic component. Said implant comprises a metallic core (1) and an outer ceramic sleeve (2) enclosing at least partly the core (1), both being assembled together by bonding. The outer ceramic layer consists of a sleeve (2) separate from the core (1), nested thereon by sliding and fixed by bonding, by providing therebetween a resist (3) for the adhesive with sufficient volume to absorb the impacts to which the implant is subjected but without inducing a significant clearance between the core (1) and the ceramic sleeve (2).

Abstract: A device for the rapid detection of hydrocarbon fire inside an armored vehicle. Infrared radiation resulting from the appearance of the fire is detected using lithium tantalate as a pyroelectric sensor for producing a voltage signal. A voltage pulse is produced at the beginning of the infrared radiation. Alternatively, the current signal of the pyroelectric sensor may be used and subsequently integrated. Fire is detected by the presence of both infrared and ultraviolet radiation.