The final contributor to our revenue growth was the continued growth of our filler and topical products from Merz and Obagi. Revenue from this product category grew $370,000 or 31% in the fourth quarter 2011 compared to fourth quarter of 2010. The improvement in this product category is also having a favorable impact on the Cutera business as this type of product complements our laser and light-based products.
We believe that with our strength in sales management teams and new product offerings, we're well positioned for continued revenue growth. We currently have 29 sales territories in the United States and Canada and are planning to increase this team to approximately 34 by the end of 2012. We'll expand our team further if our sales performance supports it.
We closed the acquisition of Iridex's aesthetic business on February 2, and we welcome the Iridex employees to the Cutera family. We believe this business combination provides a great opportunity for us and are in the process of fully integrating this business into Cutera.