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Property and Equipment, net
 3 Months Ended
Mar. 31, 2023
Property, Plant and Equipment [Abstract]  
Property and Equipment, net

4. Property and Equipment, net

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

 

 

 

Useful lives
(in years)

 

March 31,
2023

 

 

December 31,
2022

 

Surgical instruments

 

4

 

$

170,108

 

 

$

158,906

 

Machinery and equipment

 

7

 

 

9,313

 

 

 

9,502

 

Computer equipment

 

3

 

 

5,051

 

 

 

4,753

 

Office furniture and equipment

 

5

 

 

6,237

 

 

 

4,760

 

Leasehold improvements

 

various

 

 

3,180

 

 

 

2,965

 

Construction in progress

 

n/a

 

 

18,048

 

 

 

15,360

 

 

 

 

 

 

211,937

 

 

 

196,246

 

Less: accumulated depreciation
   and amortization

 

 

 

 

(102,187

)

 

 

(94,294

)

Property and equipment, net

 

 

 

$

109,750

 

 

$

101,952

 

 

Total depreciation expense was $8.6 million and $7.1 million for the three months ended March 31, 2023 and 2022, respectively. Construction in progress is not depreciated until placed in service. Property and equipment includes assets under financing leases and the related amortization of assets under financing leases is included in depreciation expense. Construction in progress includes costs associated with internal-use software.