Table 4.

Categories of topics with samples.

Categories		No. of associated topics	Sample words
Leading topic
	Status/social	5	talk; thing; stuff; weekend
	Product announcement	2	visit; product; announce
Dental care
	Clinical	37	odontogenic; nasal; sinusitis
	Materials or equipment	12	mill; impression; scanner
	Oral health	5	oral, health, bleach
Dental practice related
	Company or organization	12	caesy; patterson
	Internet related	12	google; search; website; site
	Computers and imaging	9	drive; storage; backup; gb; hard
	Fees and payment	7	fee; provider; medicare; scholarship
	Management and employees	5	manager, team
	Conferences	3	booth; meeting; exhibit
Other
	School	6	school, class
	Child	4	child; smile; kid; health
	Academic papers	4	study; publish; article; outcome
	Miscellaneous other	53	food, video, glide, marketing
Total		176