Complex sentence: The mechanism of pathology of CCCA has only been postulated and not proven, however one theory involves pressure exerted on the internal root sheath leading to damage, which leads to the recruitment of inflammatory cells and the end result of scarring.
Split into simpler sentences: The mechanism of pathology of CCCA has only been postulated and not proven. However, one theory involves pressure exerted on the internal root sheath leading to damage, which leads to the recruitment of inflammatory cells and the end result of scarring.