UPDATE 1-Align Technology Q4 profit lags; sees weak Q1 earnings

* Q4 adj EPS $0.14 vs est $0.17

* Q4 rev $92.9 mln vs est $91.9 mln

* Sees Q1 EPS $0.15-$0.17

* Sees Q1 rev $99-$102.5 mln

Jan 26 (Reuters) - Align Technology Inc (ALGN.O), a maker of teeth-alignment systems, posted a lower-than-expected quarterly profit on higher costs, and forecast weak first-quarter earnings.

For the first quarter, Align expects to earn 15-17 cents per share on revenue of $99-$102.5 million.

Analysts were expecting earnings of 19 cents a share on revenue of $95 million, according to Thomson Reuters I/B/E/S.

For the fourth quarter, net income was $9.9 million, or 13 cents per share, compared with $11.5 million, or 15 cents a share, last year.

Excluding items, the company earned 14 cents a share. Revenue rose 7.2 percent to $92.9 million.

Analysts on average had expected the company to earn 17 cents a share, excluding special items, on revenue of $91.9 million, according to Thomson Reuters I/B/E/S.

The results included pre-tax litigation settlement costs of $1.2 million related to the settlement of a class action lawsuit, the company said in a statement.

The stock, which has risen 3 percent since the company reported its third-quarter results in October, closed at $20.51 Wednesday on Nasdaq. They were trading down 3 percent after the bell (Reporting by Rajarshi Basu in Bangalore; Editing by Don Sebastian) ((rajarshi.basu@thomsonreuters.com; within U.S. +1 646 223 8780; outside U.S. +91 80 4135 5800; Reuters Messaging: rajarshi.basu.thomsonreuters.com@reuters.net))