ARK's Blog

The original version of the Z-Vibe had a single-ended design.  It came with one  Probe Tip.  You would turn the Z-Vibe on by twisting that Probe Tip into the handle.  And you would replace the battery from that end as well by untwisting the tip. We later came out with a newer version:  the end with the Probe Tip (the end that goes in the mouth) is now sealed …

Jaw grading is the ability to visually judge how far you need to open your mouth to take a bite out of certain foods and to say certain speech sounds. For example, say "ooooo" versus "aaahh" - can you feel the height difference in your jaw? It needs to open just a little bit for "eeee," but wider for "oooh." Or, imagine taking a bite out of a thin cracker versus a burger - there's a big diff …