The woman allegedly poisoned by a dental nurse told a court that there had been 'disharmony' at the practice in Shefford, Bedfordshire.
Laura Knowles practice manager told the court a dentist in the surgery requesting not to work with Kaur and in turn Kaur refusing to work with another dentist.
Despite the discontent in the Shams Moopen Dental Practice, she believed she was on good terms with Kaur, telling the jury: "I considered myself to be Ravi's friend and mentor."
The case continues.
More top news
Armed police patrol the region's biggest Christmas market in response to the heightened nation terror threat.
Sister Laura and Philippa from Bury St Edmunds have beaten the odds by giving birth to their babies on the same day
A man student from Luton who told an undercover police officer he was willing to use a suicide vest has been detained for six years.