Understanding Biofilm and Its Impact on Oral Health

Your mouth contains over 700 different strains of bacteria which naturally form a sticky layer known as biofilm. When this biofilm is not effectively disrupted daily, it can lead to inflammation of the gums and the development of conditions such as gingivitis, periodontitis, and peri-implantitis.
According to the World Health Organization, gum disease affects over half of adults worldwide and remains one of the leading causes of tooth loss. Even patients who brush regularly can still develop periodontal disease if biofilm accumulates beneath the gum line or in difficult-to-clean areas.
At Mint Dental Hygiene, we utilise advanced phase contrast microscopy technology to visually monitor live oral biofilm in real time — a technology not widely used within dental hygiene practices in New Zealand. This allows patients to better understand plaque activity, inflammation, and the importance of ongoing preventive care by seeing changes within their own oral environment on screen.
Research continues to show strong links between chronic oral inflammation and wider health conditions including diabetes, cardiovascular disease, stroke, and respiratory illness.
Dental hygienists are specially trained in the prevention, monitoring, and treatment of gum disease. Through professional biofilm removal, personalised oral hygiene guidance, and advanced monitoring technology, regular hygiene visits help support healthier teeth, gums, implants, and long-term oral health.

Microscope Images of Dental Plaque.

Advanced Biofilm Monitoring with Phase Contrast Microscopy

At Mint Dental Hygiene, we believe patient education should go beyond simply being told there is inflammation present. Understanding what is happening inside the mouth visually can create a far greater awareness of oral health and the importance of daily plaque disruption.
We are pleased to offer advanced live biofilm monitoring using phase contrast microscopy technology — a system not widely used within general dental hygiene practices in New Zealand.
What Is Phase Contrast Microscopy?
Phase contrast microscopy is an advanced imaging system that allows naturally transparent plaque biofilm to be viewed live on screen without the need for staining or dyes.
Using a small sample of plaque collected comfortably during your appointment, we can visualise bacterial biofilm activity in real time and monitor changes in oral hygiene and gum health over time.
This technology can help patients better understand:• Why gums bleed• Areas of plaque stagnation• The importance of daily home care• Biofilm accumulation around implants and difficult areas• The difference between active inflammation and stable maintenance
A More Personalised Approach to Preventive Care
Many patients have never seen the bacteria and biofilm responsible for chronic gum inflammation. Seeing these changes visually often creates a much stronger understanding of oral health than verbal explanations alone.
Biofilm monitoring may be particularly beneficial for:• Periodontal disease monitoring• Implant maintenance• Bleeding gums• Orthodontic patients• Dry mouth sufferers• Smokers• Patients struggling with plaque build-up• Patients wanting a more advanced preventive approach
Monitoring Changes Over Time
One of the greatest benefits of phase contrast microscopy is the ability to monitor changes in oral biofilm environments over time.
This allows us to assess:• Improvements in plaque disruption• Response to hygiene treatment• Stability of periodontal maintenance• Implant tissue health• Long-term oral hygiene consistency
Rather than relying purely on symptoms, this visual approach helps create a clearer picture of how the oral environment is responding to treatment and home care routines.
Advanced Technology with a Preventive Focus
At Mint Dental Hygiene, our focus has always been centred around prevention, education, and minimally invasive care. The addition of live biofilm imaging further supports our commitment to providing advanced hygiene techniques and technology designed to help patients better understand and maintain their oral health.
Please note:Phase contrast microscopy is used as an educational and monitoring tool to support preventive dental hygiene care. It is not intended to diagnose medical conditions or replace dental examinations and periodontal assessments.
To learn more about advanced biofilm monitoring or to book an appointment, please contact Mint Dental Hygiene.

Gum Disease

What Is Gum Disease?It refers to an infection of the tissue that surrounds and holds your teeth in place. There are two distinct stages to periodontal disease: The first stage, gingivitis, involves swelling and reddening of the gum tissue. The second, periodontitis, can mean the gums actually pulling away from teeth, bones deteriorating, and teeth loosening and potentially falling out. What Causes It?The simplest explanation for what causes periodontal disease is plaque bacteria. The plaque that builds up daily eventually hardens into calculus if not brushed away. This calculus spreads and overtime it builds up below the gum line causing a gum disease. Inflammation, bleeding, bad breath and soreness will set in and if left untreated will cause damage to the gums and supporting bone holding the teeth in position. What Are Its Risk Factors?While bacteria is the main culprit behind periodontal disease, there are a number of lifestyle or behaviour factors that can increase the persons chances of it developing and progressing. Some of the leading risk factors are:
  • Smoking discuises bleeding so people who smoke don’t realise they have gum disease.
  • Poor oral hygiene (not brushing teeth regularly twice a day, not using interdental brushes/aids)
  • Diabetes- treating gum disease can improve your diabetes
  • Diseases that suppress the immune system- reduced / slow healing of the gums
  • Medications that reduce saliva production
  • Hormonal changes in girls and women
  • Stress
  • Crooked teeth
  • Genetic predisposition
What Are Its Warning Signs?Some of the most common and obvious signs of periodontal disease include:
  • Red/swollen gums
  • Tender/bleeding gums.
  • Persistent bad breath or bad taste in the mouth.
  • Sensitive teeth
  • Pain when chewing
  • Changes to your bite
  • Pulling away of gum tissue from teeth
  • Loose teeth
How Is It Treated?Once a dentist or hygienist has diagnosed the periodontal disease from their initial oral health assessment they can provide some dental options to help improve and resolve the issues. Patients should keep in mind that the success of any treatment option is going to depend on their willingness to keep up good oral hygiene habits at home. That said, the early stage of periodontal disease — gingivitis — can be treated with regular cleanings from your hygienist in concert with daily brushing and flossing. More advanced periodontal disease might require further treatment options, such as deep-cleaning of the teeth roots below the gum surface or referral to a periodontal specialist. Additional Facts About Periodontal Disease
  • 47% of all adults over 30 have some form of periodontal disease
  • 70% of adults over 65 have the disease
  • Periodontal disease is more common in men (56%) than in women (38%)
  • 64% of current smokers have periodontal disease
Stages of Gum Disease