The Australian Institute of Criminology found, when looking at the patterns of suicide by occupation:
The general pattern
in Australia is that those in unskilled
and semi-skilled blue-collar
occupations which are characterised
by low job autonomy, greater external supervision, less
on-the-job training, poorer promotional
possibilities, lower wage levels and
greater sensitivity to market forces tend to have
high suicide rates. Furthermore, their suicide rates increase
significantly with age. Occupations which are generally high status
and have good career paths, and are
well paid, have lower suicide rates.
They did not explicitly mention dentists, which I interpret to mean there is no unusual association that needed mentioning when discussing the topic of occupational risk. Thus, it would be expected that Australian dentists have a low suicide risk.
I think it is safe to assume that suicide profiles in Australia are similar to other countries.