Hello! I have read you project description. I have experience on various architectural and interior design projects, unfortunately not the dental surgery, but I am familiar with the special requirements of that space in general and you have already provided most information necessary to create a functional layout. Also, I have been working for the company that furnishes dental surgeries (different types of cabinets specially intended for dental offices and dental chairs).
Regarding the existing reception, kitchen and the sterilisation room, I would have to see it first (there is no attachment) to be able to tell if all, or some parts, can be incorporated in overall design.
You wrote that 'The surgery will have two dental chairs', I believe that those should be in separate rooms, but maybe your regulation is different.
3d model and rendering is not a problem, you can check the 3d folder in my portfolio, if you have time. I only have two dental chair models though, in my 3dsmax library ('granum sonata' and 'chirana') so I would have to use one of those in the model.
If you have any questions, feel free to contact me.