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
Rather cloudy with a few showers tonight. Some bright spells on Monday with scattered showers.
Forty fundraisers have plunged 17,000 feet at Sibson Aerodrome in Cambridgeshire to raise money for seriously ill children.
A man's been found dead on railway tracks after police discovered his partner's body in a hotel room in Bedford.