i believe there are around 12 stations at leeds each with a different task. for dentistry this includes a manual dexterity station that could be doing something such as origami. there is also a roleplay station (probably giving bad news to someone). there will probably be a station where you have to give instructions to the interviewer on how to complete a specific task. maybe an ethics station. and others where they just give you normal interview questions.
its hard to properly predict what to expect because they could change at any time. just prepare for everything