How are you measuring the intermolar width? There's many standards of measuring it. Mike Mew uses the shortest distance between the insides of first molars. 52mm using this standard is really really good, in the same range as our paleolithic ancestors. So you shouldn't really have a V-shaped arch at this point. Therefore I suspect you're using a different standard, like the largest distance between the outsides of first molars or something.

There's been several transformations in Adult Case Discussions over here where people have increased their IMWs well into adulthood. The two that I was most impressed with are Progress's and Sailor's transformations, but I'm sure they're others. However, they seem to be hard mewing for accelerated results (max IMW increase of ~0.5-1mm/month). Soft mewing seem to produce much slower changes in my own personal experience, probably taking years and decades of time for notable results.

Hi,

Thanks for your reply - the 52mm I posted was my rear molar, the shortest distance between my two first molars is about 44-46mm.

I do hard mew whenever I remember, and I certainly do notice a difference in feeling while doing it over regular mewing.Do you know of any recommended ways in which one can actively increase the width of the front teeth? I understand the teeth are all supposed to move together and fall into alignment, but my tongue seems to be exerting a lot more pressure on the rear teeth (which makes sense I suppose because the tongue is widest at the base).

I'll check out their transformations