I am interested that you state that it is not really good for dental health. I have read several studies (I'll cite a few below) that seem to indicate that it is, in fact, very beneficial. I am very interested in reading what you have seen to the contrary!
Also, I don't know that I consider sugar alcohols to be an artificial sweetener (given their natural roots) but I will concede they do have a (well deserved) reputation for inducing diarrhea and other gastric distress when eaten in sufficient quantity.
Effect of xylitol on an in vitro model of oral biofilm.
Badet C, Furiga A, Thébaud N.
Oral Health Prev Dent. 2008;6(4):337-41.
PMID: 19178100 [PubMed - in process]
Xylitol gummy bear snacks: a school-based randomized clinical trial.
Ly KA, Riedy CA, Milgrom P, Rothen M, Roberts MC, Zhou L.
BMC Oral Health. 2008 Jul 25;8:20.
PMID: 18657266 [PubMed - in process]
Long-term effect of xylitol gum use on mutans streptococci in adults.
Haresaku S, Hanioka T, Tsutsui A, Yamamoto M, Chou T, Gunjishima Y.
Caries Res. 2007;41(3):198-203.
PMID: 17426399 [PubMed - indexed for MEDLINE]
Dental plaque formation and salivary mutans streptococci in schoolchildren after use of xylitol-containing chewing gum.
Holgerson PL, Sjöström I, Stecksén-Blicks C, Twetman S.
Int J Paediatr Dent. 2007 Mar;17(2):79-85.
PMID: 17263856 [PubMed - indexed for MEDLINE]
Effect of xylitol candies on plaque and gingival indices in physically disabled school pupils.
Shyama M, Honkala E, Honkala S, Al-Mutawa SA.
J Clin Dent. 2006;17(1):17-21.
PMID: 16838877 [PubMed - indexed for MEDLINE]
There are plenty more… but I’ve not seen any that indicate that Xylitol is not beneficial to dental health…