Trained professionals involved in bridge design? (6,8)

I believe the answer is:

dental surgeons

I'm a little stuck... Click here to teach me more about this clue!

'trained professionals involved in bridge design?' is the definition.
I can't judge whether this definition defines the answer.

'trained professionals' is the wordplay.
'trained' becomes 'dental' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'professionals' becomes 'surgeons' (surgeon is a kind of professional).
'dental'+'surgeons'='DENTAL SURGEONS'

Can you help me to learn more?

(Another definition for dental surgeons that I've seen is " fillers?".)

I've seen this clue in The Telegraph.

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