According to SalaryExpert, the average wage for a dental hygienist in Singapore is $77000 or an equivalent hourly rate of $37 and between $27-81000 according to PayScale. he highest level dental hygienist in Singapore may earn around $96000 and the entry-level earns an average of $55000 which means around $4000 to $8000 per month. Normally, a single procedure such as teeth cleaning at the dental hygienist cost between $100 - $200.