Table 1. Basic characteristics of participants.

		Age (yr)
		20–29		30–39		40–49		50–59		60–69		70–79
		%	n	%	n	%	n	%	n	%	n	%	n
Frequency of diving
	≥4 times a week	68.4%	26	61%	30	74%	50	67.2%	41	65.2%	15	0	0
	2–3 times a week	10.5%	4	27%	13	21%	14	24.6%	15	26.1%	6	100%	3
	≤1 time a week	21.1%	8	12%	6	6%	4	8.2%	5	8.7%	2	0	0
Duration of diving per day (min)			223		238		281		263		263		120
Occupational diving work engagement years		4.6		10.9		19.9		29.7		37.7		26.7
Tooth pain		10.5%	4	24%	12	18%	12	19.7%	12	13.0%	3	0	0
Uncomfortable feeling in the teeth		2.6%	1	10%	5	12%	8	13.1%	8	8.7%	2	0	0
Sensory sensitivity		2.6%	1	6%	3	7%	5	4.9%	3	0.0%	0	0	0
Swollen gums		0.0%	0	6%	3	4%	3	6.6%	4	0.0%	0	0	0
Painful gums		0.0%	0	6%	3	4%	3	11.5%	7	13.0%	3	0	0
Feeling of pressure in the teeth		5.3%	2	8%	4	9%	6	9.8%	6	17.4%	4	0	0
Pain in temporomandibular joint		18.4%	7	14%	7	22%	15	11.5%	7	8.7%	2	0	0
Detachment of inlays or crowns		2.6%	1	14%	7	10%	7	21.3%	13	4.3%	1	0	0