The phrase "heavy buildup" typically means an excessive amount of something gathered or accumulated over time, often creating a dense or crowded situation. Full definition
There is extremely heavy buildup, pus around multiple teeth, very mobile teeth, gums that bleed easily and deep recession and pocketing. (svg-vets.com)
Proper home care such as brushing and feeding an oral health diet or treats (Hill's t / d) helps slow plaque buildup, and yearly dental cleanings help remove heavy buildup, so periodontal disease is avoided. (uptownvet.com)
As important as it is to physically wash off the grime of the day, it is equally important to energetically wash the heavy buildup you have acquired in the last 24 hours. (mindbodygreen.com)