PROPERTY AND EQUIPMENT (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property and Equipment [Line Items]
Property and equipment	$ 27,163,082	$ 23,879,783
Less - accumulated depreciation	(19,268,749)	(18,090,262)
Property and equipment, net	7,894,333	5,789,521
Depreciation expense	2,097,837	1,729,669	1,693,416
Dental Equipment [Member]
Property and Equipment [Line Items]
Property and equipment	8,983,394	8,323,040
Furniture and Fixtures [Member]
Property and Equipment [Line Items]
Property and equipment	1,479,897	1,364,186
Leasehold Improvements [Member]
Property and Equipment [Line Items]
Property and equipment	10,147,928	8,952,389
Computer Equipment, Software and Related Items [Member]
Property and Equipment [Line Items]
Property and equipment	4,854,173	3,653,587
Instruments [Member]
Property and Equipment [Line Items]
Property and equipment	$ 1,697,690	$ 1,586,581

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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- Definition

Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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