Paragraph 2
Then £x shall be compared with the full amount of the charges payable to the dental practitioner by the patient in respect of the course of treatment (“£y”) and—
(a)
if £x equals or exceeds £y, there is no charge for the supply of the appliance;
(b)
if £x is less than £y, the charge for the supply of the appliance is—
(i)
£y minus £x, or
(ii)
the amount specified in relation to the appliance in column (2) of Part I of Schedule 1,
whichever is the lesser amount.