Pacific Smiles Group entered a scheme implementation deed with NDC BidCo for a complete acquisition.
Shareholders will receive $1.90 per share in cash, possibly with a fully franked dividend of up to 12 cents per share.
The board unanimously recommends the scheme, citing a significant premium over recent prices and rival proposals.
The scheme is expected to close by August, pending shareholder and regulatory approvals, including the Foreign Investment Review Board.