Table 1.

Distribution of the two birth cohorts

	Number	f	m	Non-accessible, jaw closed	Non-accessible, jaw open
Cohort 1930–1932	66	30	36	3	10
Cohort 1950–1952	78	36	42	2	4
Σ TMJs	144	66	78	5	14

N: number of temporomandibular joints (TMJs), separated in TMJs from females (f) and males (m). At closed jaw, 139 TMJs were accessible, while 130 TMJs were accessible at open jaw. In the Cohort 1930–1932, one female participant could not be evaluated both at open and closed jaw