UPDATE 2-Sirona Dental Q4 results beat Street view

* Q4 adj EPS $0.83 vs est $0.51 -- Thomson Reuters I/B/E/S

* Revenue up 4.2 pct to $188.2 mln

* Sees FY 2010 oper income of $166-$176 mln

* Shares up as much as 4 pct (Adds details, analyst comment, share movement)

Dec 4 (Reuters) - Sirona Dental Systems Inc (SIRO.O) posted a fourth-quarter profit that handily beat estimates, driven by sales of its restoration system, CEREC.

For fiscal 2010, the dental equipment maker expects constant currency revenue growth of 4 percent to 6 percent and operating income, excluding amortization expense, in the range of $166 to $176 million. It had posted revenue of $713.3 million in fiscal 2009.

For 2010, analysts on average expect the company to post revenue of $754.8 million, according to Thomson Reuters I/B/E/S.

JP Morgan analyst Tycho Peterson said the company's outlook set a reasonable bar for the coming year and maintained an "overweight" rating on its stock.

For the fourth quarter ended Sept. 30, it earned a profit of $26.7 million, or 48 cents a share, compared with a loss of $5.2 million, or 9 cents a share, a year ago.

Adjusted for items, the company earned 83 cents a share, beating analysts' average expectation of 51 cents a share, according to Thomson Reuters I/B/E/S.

Revenue rose 4.2 percent to $188.2 million. Analysts were expecting $180.6 million.

Sales at the computer aided design/computer aided manufacturing segment grew 35.3 percent, while revenue at the treatment segment declined 15 percent.

Sirona's CEREC system is an in-office application which enables the dentist to produce high quality restorations from ceramic material and insert them into the patient's mouth during a single appointment.

"Bottom-line, demand for SIRO's products remains healthy, and while investors may soon begin worrying about tougher H2-10 revenue comps, we believe numerous H2-10 expense savings can keep earnings momentum solid well into FY'11, " Robert W. Baird analyst Jeff Johnson said.

He maintained an "outperform" rating on the company's stock.

Shares of the company were up 3 percent at $31.99 in morning trade on Nasdaq. They touched a high of $32.44 earlier in the session. (Reporting by Shailesh Kuber in Bangalore; Editing by Aradhana Aravindan) ((shailesh.kuber@thomsonreuters.com; within U.S. +1 646 223 8780; outside U.S. +91 80 4135 5800; Reuters Messaging: shailesh.kuber.reuters.com@reuters.net))