If a white dwarf star slowly gains enough extra mass to pass a critical limit, what specific, powerful type of supernova explosion then destroys it completely?

The specific, powerful type of supernova explosion that destroys a white dwarf star after it slowly gains enough extra mass to pass a critical limit is a Type Ia supernova. A white dwarf is the very dense, compact remnant core of a star that has exhausted its nuclear fuel, with its gravity supported by electron degeneracy pressure, a quantum mechanical force preventing further collapse. This scenario typically occurs in a binary star system, where the white dwarf's strong gravitational pull strips, or "accretes," matte....