Property and equipment, net consist of the following (in thousands, except as indicated):


	Useful lives (in years)	June 30, 2026			December 31, 2025
Surgical instruments	4	$	326,459		$	311,517
Machinery and equipment	7		13,342			13,123
Computer equipment	3		32,718			32,434
Office furniture and equipment	5		6,278			6,548
Leasehold improvements	various		4,414			4,402
Construction in progress	n/a		2,070			646
			385,281			368,670
Less: accumulated depreciation and amortization			(246,044	)		(233,346	)
Property and equipment, net		$	139,237		$	135,324

Total depreciation and amortization expense was $15.2 million and $29.8 million for the three and six months ended June 30, 2026, respectively. Total depreciation and amortization expense was $15.0 million and $30.8 million for the three and six months ended June 30, 2025, respectively. Construction in progress is not depreciated until placed in service. Property and equipment, net includes assets under financing leases and the related amortization of assets under financing leases is included in depreciation and amortization expense.