有關牙根斷裂後的組織反應,何者預後最差?
以鈣化組織癒合(healing with calcified tissue)
以結締組織癒合(healing with interposition of connective tissue)
以骨及結締組織癒合(healing with interposition of bone and connective tissue )
以肉芽組織癒合(healing with interposition of granulation tissue)