This is a base component I created while designing my ergonomic hair comb (http://www.thingiverse.com/thing:1689741), and this one is simply rendered without the handle, resulting in a basic comb. It retains the smoothed backing, the rounded ends to the teeth, and the curved pattern of lengths to the teeth. The sizing is also fully parameterized in the OpenSCAD file.

As with the comb with the handle, at this thinness, PLA gives just enough flex to work well for a comb. It might be interesting to try a variety of slightly more flexible plastics on this design, but I don't have them on hand at the moment. If you try some please post a note in the comments or as a make showing the result.

Update 2016-08-07: My son pointed out that the corners of the original design were a little sharp due to the flattened sphere I used to generate the ends of the teeth, so I redid the teeth with a spherical tip approached at a parameterized angle. (This update is the v2 files, matching the cover photo.) The small spherical tip at the end of the comb's teeth also facilitates better parting of the hair. Also, if you can, I recommend printing this in PETG as the slight flexibility makes it a very nice material for this.