Table 1. Materials of the study.

CPC: cetylpyridinium chloride

Material	Composition	Manufacturer
Nigella sativa oil	Pure black seed oil 100%, pressed on cold	Imtenan Co., Cairo, Egypt
Wheat germ oil	Pure oil 100%, pressed on cold	Imtenan Co., Cairo, Egypt
CPC gel	CPC and lidocaine	Amoun Pharma Co., Alexandria, Egypt