Q. Hi – I have an existing cap on a molar (actually it may be an ‘onlay’, as it is essentially half a tooth than has been cemented on to the remaining half-molar, which is fully intact – i.e., has not been ground into a peg) which has just broken in half. The dentist I have just seen has recommended a crown – which would require drilling away the remaining healthy tooth base into a peg – rather than another onlay. However, I’d prefer the onlay as it requires less intervention, and no grinding of what is otherwise a healthy half-tooth. What is your view on the pros versus cons of the two approaches? Thanks!