Disorders of salivary glands

Question 1

Xerostomia (dry mouth)

Answer 1

Caused by - 
Irradiation (radiotherapy of the head and neck)
Medications 
Sjogrens syndrome 
Can cause - 
Increase in caries 
Oral infections 
Soft tissue trauma 
Problems with speech, swallowing and chewing 
Poor taste sensation

Question 2

Ptyalism (excess salivary)

Answer 2

Caused by -
Underlying disease  such as - 
Periodontal disease 
Soft tissue injury or trauma 
Oesophagitis 
Parkinson's 
Mercury poisoning