A breaker tooth assembly for a mineral breaker, a drum assembly including such a breaker tooth assembly and a mineral breaker with such a breaker tooth assembly or drum assembly are described. The breaker tooth assembly including a horn protrusion extending from a rotatable support, the horn protrusion having a pair of opposed front and rear faces; and a shell structure encapsulating the horn protrusion and defining the outer shape of the breaker tooth; wherein the shell structure comprises a plurality of covers which are non-releasably secured to one another, but not to the horn protrusion, to define a unitary breaker tooth assembly; and wherein at least one cover of the shell structure is releasably connectable with a corresponding face of the horn protrusion.