Simply deduct this from the gross figure. I am assuming a vat rate of 17.5%. I have tried to show the underlying methodology, because if the vat rate changes you won't understand how to re-calculate. If the vat rate was 20% you would multiply the gross by 20 and divide by 120.
It is now known that the cause of tooth abfraction can directly be linked to clenching and grinding of teeth. This can occur during the day but most of the time it occurs at nighttime when youâre asleep.
Abfraction causes. Abfraction causes. The cause of an abfraction, more properly known as non-carious cervical lesion (NCCL), is debatable. Abfraction by definition is related to occlusal stress. Although many use the terms interchangeably, I will use NCCL to describe the lesions except where occlusal stress is believed or reported to be the cause.