Final answer:
Improper oral hygiene practices can lead to inflammation and erosion of gums, tooth decay, and other oral health problems including bad breath and tooth loss. Poor oral health can also contribute to the development of diseases like cardiovascular disease.
Step-by-step explanation:
Poor oral hygiene practices can lead to a number of problems such as inflammation and erosion of gums, bleeding, halitosis (bad breath), erosion of cementum, and ultimately tooth loss in advanced infections. Dental caries (tooth decay), tartar, and gingivitis (inflammation of the gums) are caused by overgrowth of oral bacteria due to insufficient dental hygiene. Additionally, poor oral health can contribute to the development of diseases like cardiovascular disease and endocarditis.