A dentist yesterday denied botching a wisdom tooth extraction by cutting open the wrong side of a patient's jaw, causing her discomfort and distress. Dr Lam Kwok-pun, who has a surgery in Mongkok's Argyle Centre, appeared before the Dental Council tribunal charged with malpractice while operating on patient Chan Man-yan on September 12, 1997. Ms Chan's jaw was injected with anaesthetic in an attempt to extract a wisdom tooth on the lower right side of her jaw. But Dr Lam allegedly mixed up the X-rays and cut open the left side of her mouth. The dentist also denies causing Ms Chan discomfort and distress. Yesterday's hearing was cut short after Dr Lam's counsel Selwyn So told council members there was a possible conflict of interest. He said council member Dr Elizabeth Kwan Lim's connection with Dr Lam was prejudicial to the case. 'Dr Lam gave evidence against Dr Kwan's husband in a civil case which may have some prejudicial effect,' Mr So told the hearing. Council chairman Dr Jeffrey Tsang Yick-sang agreed to remove Dr Kwan from the panel 'in the interests of justice'. Dr Lam has been charged with failing to verify the presence of a permanent third molar (wisdom tooth) before proceeding to attempt to surgically remove it under local anaesthetic, when in fact there was no such molar. The hearing was adjourned to a date yet to be fixed.