EXHIBIT 99.2

Quarterly Results for 2007 and 2008

The following is
a summary of select statement of operations data for each quarter in the years ended December 31, 2008 and 2007, and select balance sheet data as of the end of each quarterly period including the effects of the restatement for the quarters
ended March 31, 2007, June 30, 2007, September 30, 2007, December 31, 2007, and March 31, 2008. The following tables and discussion provide only a summary of the effects of the restatement, do not include all
line items that have been impacted by the restatement and should be read in conjunction with the restated consolidated financial statements contained in Note 2, Restatement of Previously Issued Consolidated Financial Statements and Note
19, Quarterly Financial Information (Unaudited) in the notes to the consolidated financial statements. The results for the quarters ended June 30, 2008, September 30, 2008 and December 31, 2008 were not previously
reported, and therefore, are not being restated.



|                                                                    |  |                                       |         |                |   |         |                    |   |         |                   |  |   |         |   |  |   |         |  
|------------------------------------------------------------------- |  | ------------------------------------- | ------- | -------------- | - | ------- | ------------------ | - | ------- | ----------------- |  | - | ------- | - |  | - | ------- | -
|                                                                    |  | First Quarter                         |         | Second Quarter |   |         | Third Quarter      |   |         | Fourth Quarter    | 
|                                                                    |  | March 31, 2008                        |         | June 30, 2008  |   |         | September 30, 2008 |   |         | December 31, 2008 | 
|                                                                    |  | As Reported                           |         | As Restated    |   |         |                    |   |         |                   |  |   |        
|                                                                    |  | (in thousands, except per share data) |        
|Statements of Operations Data:                                      |  |                                       |         |                |   |         |                    |   |         |                   |  |   |         |   |  |   |         |  
|Product sales                                                       |  | $                                     | 88,492  |                | $ | 75,125  |                    | $ | 80,623  |                   |  | $ | 70,202  |   |  | $ | 73,946  |  
|Royalties, fees and other                                           |  |                                       | 2,543   |                |   | 2,428   |                    |   | 5,053   |                   |  |   | 3,649   |   |  |   | 3,155   |  
|Total revenues                                                      |  |                                       | 91,035  |                |   | 77,553  |                    |   | 85,676  |                   |  |   | 73,851  |   |  |   | 77,101  |  
|Gross profit                                                        |  |                                       | 65,333  |                |   | 53,966  |                    |   | 62,784  |                   |  |   | 53,389  |   |  |   | 49,082  |  
|Operating expenses                                                  |  |                                       | 52,785  |                |   | 50,415  |                    |   | 66,171  |                   |  |   | 58,876  |   |  |   | 81,309  |  
|Net income (loss)                                                   |  |                                       | 9,264   |                |   | 2,231   |                    |   | (3,169  | )                 |  |   | (4,875  | ) |  |   | (28,934 | )
|Basic net income (loss) per share                                   |  | $                                     | 0.35    |                | $ | 0.08    |                    | $ | (0.12   | )                 |  | $ | (0.18   | ) |  | $ | (1.08   | )
|Diluted net income (loss) per share                                 |  | $                                     | 0.34    |                | $ | 0.08    |                    | $ | (0.12   | )                 |  | $ | (0.18   | ) |  | $ | (1.08   | )
|                                                                    |  |                                       |         |                |  
|Balance Sheet Data:                                                 |  |                                       |         |                |   |         |                    |   |         |                   |  |   |         |   |  |   |         |  
|Cash, cash equivalents, restricted cash equivalents and investments |  | $                                     | 33,168  |                | $ | 33,094  |                    | $ | 42,457  |                   |  | $ | 39,604  |   |  | $ | 37,980  |  
|Working capital                                                     |  |                                       | 151,918 |                |   | 115,268 |                    |   | 105,686 |                   |  |   | 105,893 |   |  |   | 41,197  |  
|Total assets                                                        |  |                                       | 445,592 |                |   | 386,323 |                    |   | 407,582 |                   |  |   | 408,065 |   |  |   | 387,276 |  
|Long-term liabilities                                               |  |                                       | 67,364  |                |   | 66,900  |                    |   | 62,584  |                   |  |   | 63,583  |   |  |   | 10,058  |  
|Total stockholders equity                                          |  |                                       | 344,032 |                |   | 275,295 |                    |   | 275,548 |                   |  |   | 270,877 |   |  |   | 244,282 |  



|                                                                    |  |                                       |         |                |   |                    |  |                   |         |             |   |             |  |             |         |             |   |         |  |   |         |  |   |         |  
|------------------------------------------------------------------- |  | ------------------------------------- | ------- | -------------- | - | ------------------ |  | ----------------- | ------- | ----------- | - | ----------- |  | ----------- | ------- | ----------- | - | ------- |  | - | ------- |  | - | ------- | -
|                                                                    |  | First Quarter                         |         | Second Quarter |   | Third Quarter      |  | Fourth Quarter    |        
|                                                                    |  | March 31, 2007                        |         | June 30, 2007  |   | September 30, 2007 |  | December 31, 2007 |        
|Fiscal 2007                                                         |  | As Reported                           |         | As Restated    |   | As Reported        |  | As Restated       |         | As Reported |   | As Restated |  | As Reported |         | As Restated |  
|                                                                    |  | (in thousands, except per share data) |        
|Statements of Operations Data:                                      |  |                                       |         |                |   |                    |  |                   |         |             |   |             |  |             |         |             |   |         |  |   |         |  |   |         |  
|Product sales                                                       |  | $                                     | 71,001  |                | $ | 64,392             |  | $                 | 76,606  |             | $ | 69,207      |  | $           | 75,492  |             | $ | 61,317  |  | $ | 84,497  |  | $ | 73,579  |  
|Royalties, fees and other                                           |  |                                       | 2,742   |                |   | 2,639              |  |                   | 2,936   |             |   | 2,827       |  |             | 2,969   |             |   | 2,859   |  |   | 2,999   |  |   | 2,896   |  
|Total revenues                                                      |  |                                       | 73,743  |                |   | 67,031             |  |                   | 79,542  |             |   | 72,034      |  |             | 78,461  |             |   | 64,176  |  |   | 87,496  |  |   | 76,475  |  
|Gross profit                                                        |  |                                       | 52,987  |                |   | 46,256             |  |                   | 57,839  |             |   | 50,541      |  |             | 57,261  |             |   | 42,982  |  |   | 66,431  |  |   | 53,556  |  
|Operating expenses                                                  |  |                                       | 44,049  |                |   | 42,895             |  |                   | 44,790  |             |   | 42,762      |  |             | 43,826  |             |   | 41,680  |  |   | 48,678  |  |   | 70,685  |  
|Net income (loss)                                                   |  |                                       | 7,136   |                |   | 3,151              |  |                   | 10,413  |             |   | 7,285       |  |             | 11,122  |             |   | 1,658   |  |   | 14,509  |  |   | (11,603 | )
|Basic net income (loss) per share                                   |  | $                                     | 0.26    |                | $ | 0.12               |  | $                 | 0.38    |             | $ | 0.27        |  | $           | 0.40    |             | $ | 0.06    |  | $ | 0.53    |  | $ | (0.42   | )
|Diluted net income (loss) per share                                 |  | $                                     | 0.25    |                | $ | 0.11               |  | $                 | 0.37    |             | $ | 0.26        |  | $           | 0.39    |             | $ | 0.06    |  | $ | 0.50    |  | $ | (0.42   | )
|                                                                    |  |                                       |         |                |   |                    |  |                  
|Balance Sheet Data:                                                 |  |                                       |         |                |   |                    |  |                   |         |             |   |             |  |             |         |             |   |         |  |   |         |  |   |         |  
|Cash, cash equivalents, restricted cash equivalents and investments |  | $                                     | 41,678  |                | $ | 41,679             |  | $                 | 41,057  |             | $ | 41,057      |  | $           | 54,938  |             | $ | 54,939  |  | $ | 43,250  |  | $ | 43,176  |  
|Working capital                                                     |  |                                       | 122,860 |                |   | 102,908            |  |                   | 137,318 |             |   | 113,487     |  |             | 161,471 |             |   | 127,864 |  |   | 148,348 |  |   | 121,991 |  
|Total assets                                                        |  |                                       | 386,317 |                |   | 371,642            |  |                   | 393,026 |             |   | 374,737     |  |             | 415,891 |             |   | 386,902 |  |   | 450,068 |  |   | 397,947 |  
|Long-term liabilities                                               |  |                                       | 6,466   |                |   | 7,902              |  |                   | 6,437   |             |   | 7,982       |  |             | 6,407   |             |   | 8,062   |  |   | 67,393  |  |   | 66,919  |  
|Total stockholders equity                                          |  |                                       | 331,241 |                |   | 314,782            |  |                   | 346,619 |             |   | 326,188     |  |             | 372,789 |             |   | 338,839 |  |   | 340,503 |  |   | 281,053 |  

2008

The restatement adjustments decreased net product sales for the quarter ended March 31, 2008 by $13.4 million, from $88.5 million as previously reported, to $75.1 million. Of this decrease, $7.0
million related to the Companys application of revenue recognition policies associated with DiscoCare revenue and $6.4 million related to revenue recognition matters associated with other distributors, agents and customers. Net product sales
for the quarter ended March 31, 2008 increased 16.7 percent compared to the quarter ended March 31, 2007 as a result of the introduction of new products, increase in sales volume as well as a favorable impact from exchange rates. The
restatement decreased operating expenses $2.4 million, from $52.8 million as previously reported, to $50.4 million. For the quarter ended March 31, 2008, we had income from operations of $3.6 million compared to income from operations of $3.4
million for the same period in 2007. Cost of product sales and operating expenses as a percent of total revenue remained relatively consistent period over period. The restatement decreased net income for the quarter ended March 31, 2008 by $7.1
million, from $9.3 million as previously reported, to $2.2 million. The restatement decreased basic net income per common share for the quarter ended March 31, 2008 by $0.27, from $0.35 as previously reported, to $0.08. As of March 31,
2008, we had $115.3 million in working capital. Changes in working capital were primarily related to revenue recognition adjustments which decreased net accounts receivable balances by $9.6 million for the quarter ended March 31, 2008.
Excluding our Credit Agreement, our principal sources of liquidity consisted of $33.1 million in cash, cash equivalents, restricted cash equivalents and investments at March 31, 2008.

Net product sales for the quarter ended June 30, 2008 were $80.6 million, an increase of 16.5 percent compared to the quarter ended
June 30, 2007, a result of increases across all three business units and increase in our Americas and international markets. For the quarter ended June 30, 2008, we had a loss from operations of $3.4 million compared to income from
operations of $7.8 million for the same period in 2007. Gyrus arbitration related expenses of $13.3 million were accrued in the second quarter of 2008 as general and administrative expenses. Net loss for the quarter ended June 30, 2008 was $3.2
million compared to a net income for the second quarter of 2007 of $7.3 million. As of June 30, 2008, we had $105.7 million in working capital. Excluding our Credit Agreement, our principal sources of liquidity consisted of $42.5 million in
cash, cash equivalents, restricted cash equivalents and investments at June 30, 2008.

Net product sales for the quarter
ended September 30, 2008 were $70.2 million, an increase of 14.5 percent compared to the quarter ended September 30, 2007, a result of increases across all three business units. International product sales increased in all three business
units and were favorably impacted by distributor acquisitions that increased our direct market presence in Europe and Australia. For the quarter ended September 30, 2008,



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we had a loss from operations of $5.5 million compared to income from operations of $1.3 million for the same period in 2007. Investigation and restatement related costs were $5.5 million in the
quarter ended September 30, 2008 and did not exist in the comparative quarter. Gyrus arbitration related expenses of $0.8 million were accrued in the third quarter of 2008 as general and administrative expenses. Net loss for the quarter ended
September 30, 2008 was $4.9 million compared to a net income for the third quarter of 2007 of $1.7 million. As of September 30, 2008, we had $105.9 million in working capital. Excluding our Credit Agreement, our principal sources of
liquidity consisted of $39.6 million in cash, cash equivalents, restricted cash equivalents and investments at September 30, 2008.

Net product sales for the quarter ended December 31, 2008 were $73.9 million, an increase of 0.5 percent compared to the quarter ended December 31, 2007, a result of increases primarily in the
markets of the Americas. For the quarter ended December 31, 2008, we had a loss from operations of $32.2 million compared to a loss from operations of $17.1 million for the same period in 2007. Investigation and restatement related costs were
$10.8 million in the quarter ended December 31, 2008. In the fourth quarter of 2008, we wrote off our entire $18.9 million of goodwill allocated to our Spine reporting unit. In the quarter ended December 31, 2007, our operating loss was
attributable to a charge to operations of $25.0 million for the settlement of our pre-existing unfavorable contract with DiscoCare, Inc. Net loss for the quarter ended December 31, 2008 was $28.9 million compared to net loss for the fourth
quarter of 2007 of $11.6 million. As of December 31, 2008, we had $41.2 million in working capital. Excluding our Credit Agreement, our principal sources of liquidity consisted of $38.0 million in cash, cash equivalents, restricted cash
equivalents and investments at December 31, 2008.

2007

The restatement adjustments decreased net product sales for the quarter ended March 31, 2007 by $6.6 million, from $71.0 million as
previously reported, to $64.4 million. Of this decrease, $5.0 million related to the Companys application of revenue recognition policies associated with DiscoCare revenue and $1.6 million related to revenue recognition matters associated with
other distributors, agents and customers. The restatement decreased operating expenses $1.1 million, from $44.0 million as previously reported, to $42.9 million. The restatement decreased the Companys net income for the quarter ended
March 31, 2007 by $3.9 million, from $7.1 million as previously reported, to $3.2 million. The restatement decreased basic net income per common share for the quarter ended March 31, 2007 by $0.14, from $0.26 as previously reported, to
$0.12. As of March 31, 2007, we had $102.9 million in working capital. Changes in working capital were primarily related to revenue recognition adjustments which decreased net accounts receivable balances by $4.9 million for the quarter ended
March 31, 2007. Our principal sources of liquidity consisted of $41.7 million in cash, cash equivalents and investments at March 31, 2007.

The restatement adjustments decreased net product sales for the quarter ended June 30, 2007 by $7.4 million, from $76.6 million as previously reported, to $69.2 million. Of this decrease, $5.5
million related to the Companys application of revenue recognition policies associated with DiscoCare revenue, and $1.9 million related to revenue recognition matters associated with other distributors, agents and customers. The restatement
decreased operating expenses $2.0 million, from $44.8 million as previously reported, to $42.8 million. The restatement decreased net income for the quarter ended June 30, 2007 by $3.1 million, from $10.4 million as previously reported, to $7.3
million. The restatement decreased basic net income per common share for the quarter ended June 30, 2007 by $0.11, from $0.38 as previously reported, to $0.27. As of June 30, 2007, we had $113.5 million in working capital. Changes in
working capital were primarily related to revenue recognition adjustments which decreased net accounts receivable balances by $3.6 million for the quarter ended June 30, 2007. Our principal sources of liquidity consisted of $41.1 million in
cash, cash equivalents and investments at June 30, 2007.

The restatement adjustments decreased net product sales for the
quarter ended September 30, 2007 by $14.2 million, from $75.5 million as previously reported, to $61.3 million. Of this decrease, $8.0 million related to the Companys application of revenue recognition policies associated with DiscoCare
revenue, and $6.2 million related to revenue recognition matters associated with other distributors, agents and customers. The restatement decreased operating expenses $2.1 million, from $43.8 as previously reported, to $41.7 million. The
restatement



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decreased the Companys net income for the quarter ended September 30, 2007 by $9.4 million, from $11.1 million as previously reported, to $1.7 million. The restatement decreased basic
net income per common share for the quarter ended September 30, 2007 by $0.34, from $0.40 as previously reported, to $0.06. As of September 30, 2007, we had $127.9 million in working capital. Changes in working capital were primarily
related to revenue recognition adjustments which decreased net accounts receivable balances by $7.2 million for the quarter ended September 30, 2007. Our principal sources of liquidity consisted of $54.9 million in cash, cash equivalents,
restricted cash equivalents and investments at September 30, 2007.

The restatement adjustments decreased net product
sales for the quarter ended December 31, 2007 by $10.9 million, from $84.5 million as previously reported, to $73.6 million. Of this decrease, $12.3 million related to the Companys application of revenue recognition policies associated
with DiscoCare revenue. Net product sales increased by $1.3 million related to revenue recognition matters associated with other distributors, agents and customers. The restatement increased operating expenses $22.0 million, from $48.7 million as
previously reported, to $70.7 million primarily due to a $25.0 million loss on a settlement of an unfavorable contract with DiscoCare. The restatement decreased net income for the quarter ended December 31, 2007 by $26.1 million, from $14.5
million as previously reported, to a net loss of $11.6 million. The restatement decreased basic net income per common share for the quarter ended December 31, 2007 by $0.95, from $0.53 as previously reported, to a loss per share of $0.42. As of
December 31, 2007, we had $122.0 million in working capital. Changes in working capital were primarily related to revenue recognition adjustments which decreased net accounts receivable balances by $5.9 million for the quarter ended
December 31, 2007. Our principal sources of liquidity consisted of $43.2 million in cash, cash equivalents, restricted cash equivalents and investments at December 31, 2007.



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