Dentist in the Chair

Dentist in the Chair is a 1960 British comedy film, directed by Don Chaffey and starring Bob Monkhouse, Ronnie Stevens, Eric Barker and Vincent Ball. The screenplay was written by Val Guest, and based on a novel by Matthew Finch. Additional scenes were written by Bob Monkhouse and George Wadmore.

Two dental students, David Cookson Monkhouse and Brian Dexter Ronnie Stevens become mixed up in the misadventures of a thief, Sam Field played by Kenneth Connor, when he tries to sell them stolen dental equipment.

Source: Wikipedia