Final answer:
Difficult areas for home care, occlusal trauma, and genetic factors can all contribute to loss of attachment in periodontal disease.
Step-by-step explanation:
One possible reason for Marsha's loss of attachment in periodontal probing could be difficult areas for home care. When certain areas of the mouth are hard to clean or reach, it can lead to accumulation of plaque and bacteria, which can cause gum inflammation and ultimately loss of attachment. Additionally, occlusal trauma caused by excessive force during biting and chewing can also contribute to loss of attachment. Finally, genetic factors can increase the risk of periodontal disease and loss of attachment.