York-based Dentsply International Inc. on Tuesday said its first-quarter profit dropped 23 percent while sales increased 26 percent, as the dental products maker continues to feel the effects from its August acquisition of Astra Tech AB.

Dentsply bought Sweden-based Astra Tech last year for $1.8 billion, which boosted revenue that largely covered the cost of buying a business.

The company earned $53.3 million, or 37 cents per share, in the quarter that ended March 31 - revealing a decline from last year's profit of $69.1 million, or 48 cents per share.

Revenue, on the other hand, rose from $570.5 million last year to $716.4 million in March.

Dentsply said it expects to earn $2.22 to $2.30 per share this year.