At least 75% and up to 85%

• Skeie et al. (2022), a large-scale review combining data from multiple studies across approximately 84,512 participants, which found a 77% prevalence of early-stage cavities and included dental X-rays to assess surfaces between the teeth, where most early-stage cavities occur;
• Agustsdottir et al. (2010), which reported 85% prevalence in children;
• Rødseth et al. (2023), which reported 85.8% prevalence in adults; and
• Autio-Gold et al. (2005), a U.S. study of 221 children aged 5–6 that included dental X-rays for surfaces between the teeth and found prevalence consistent with this range.

• Autio-Gold et al. (2005), which reported 4.66 cavities in children;
• Amarante et al. (1998), which reported 4.30 cavities in children and 10.00 in teenagers;
• Agustsdottir et al. (2010), which reported 5.67 cavities in 12-year-olds and 10.66 in 15-year-olds; and
• Rødseth et al. (2023), which reported 3.79 cavities in adults.

4.6 is a weighted average for the entire population.

Weekly figure = patients seen per week × prevalence × average lesions per affected patient.

• Per month = weekly figure × 4.3, the average number of working weeks in a calendar month.
• Per year = weekly figure × 48, allowing roughly four weeks a year for holidays and practice closure.

All figures are per chair and are rounded to the nearest whole tooth. The patient graphic shows a sample of up to 50 patients; where fewer than 50 patients per week are entered, the remaining places are shown faded.