OrthoAccel Technologies raised another $5 million equity round, more than 2 years after a previous raise brought in the same amount.

The Houston-based company makes the AcceleDent device, which is designed to accelerate tooth movement using sonic technology. Ina regulatory filing OrthoAccel said 11 unnamed investors participated in the round.

The $5 million raised in January 2014 came from existing backers Healthpoint Capital and S3 Ventures, along with standing stockholders, the company said at the time.