On-line retail store services featuring dental supplies; Operating on-line marketplaces for sellers and buyers of goods and/or services; Providing a searchable online advertising website and informational guide featuring the goods and services of other vendors via the internet in the field of dentistry; Providing a website featuring an online marketplace for exchanging goods and services with other users; Providing a website used to place on-line commercial orders in the field of dentistry; Providing a website for connecting sellers with buyers