From very early on ‘riddims’ have been the core of reggae music, and been seen as reusable. But deejay and later dancehall has taken this tendency to what some people consider an obsessive extreme. The apotheosis, or nadir, of the recycled riddim came in 1985, the year of ‘Sleng Teng’, which gave birth to the hard, modern dancehall sound of the computerised, digitalised, drum machines.
Source: wiktionary