Table 1.

Summarising table of observed activation of apoptotic caspases.

	Caspase-3	Caspase-6	Caspase-7	Caspase-8	Caspase-9
Primary enamel knot	***	–	***	–	***
Enamel epithelium	–	–	**	*	–
Pre-/ameloblasts	–	–	**	*	–
Stellate reticulum	–	–	–	***	–
Dental mesenchyme	–	–	–	–	–
Pre-/odontoblasts	–	–	**	**	–
Pre-osteoblasts	–	–	–	*	*
Osteoblasts (prenatal)	*	*	**	**	–
Osteoblasts (postnatal)	*	–	***	*	–
Osteocytes	*	–	**	*	–
Lining cells	–	–	*	**	–
Osteoclasts (prenatal)	*	*	**	***	–
Osteoclasts (postnatal)	*	*	***	***	*

^–negative;

^*weak activation;

^**medium activation;

^***abundant activation.