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
A new 'no-budget' film is being made using the vast landscapes of the Norfolk countryside as its setting.
Documents that give a harrowing insight into the lives of slaves in the late 18th century have been published online.
A herd of rare sheep is being grazed on a nature reserve in west Norfolk in an effort to help the birds who nest there.