If anyone is interested, here is a link where you can download the study: https://www.researchgate.net/publication/221770027_Correlati...

I few interesting bits — it does involve cursive, but it's Arabic and it's graded on a rubric that includes things like "Presenting the beauty aspects of Arabic writing'. Also, given a sample of 71 students and a p<0.001 means the correlation coefficient only needs to be around 0.40 which means handwriting and drawing may only explain about 16% of the variance of these dental skills. That's not nothing, but given the subjective nature of the test and the confounders (does this handwriting sample really measure motor skills or maybe it measures care and attention to detail, or conscientiousness), I'd be a little wary of using this to argue for education policy.

Still, glad you posted it and glad I read it. It interesting.