2026 Hong Kong Complete Toothbrush Selection Guide: Manual or Electric — Which Is Better? Professor Zhu Zhenxiong Teaches You How to Choose the Right Brush Head by Age

With so many toothbrushes available on the market — square or diamond-shaped brush heads, flat or wavy bristles, and handles that are straight, angled, or flexible — how do you choose the right one? In Hong Kong in 2026, proper oral care has become a cornerstone of overall health. Professor Chu Chun-hung, Associate Dean of the HKU Faculty of Dentistry, notes that toothbrushes of any design can clean effectively — the key is choosing soft bristles and a brush head size appropriate for your age.

1. Choose by Age: Brush Head Size Reference Guide

Professor Chu recommends adjusting brush head size as children grow older. Parents can use the following Hong Kong coin comparison as a reference when selecting a toothbrush for their child:

Age Group	Brush Head Size Reference (Approximate Diameter)	Corresponding Hong Kong Coin
0 to 2 years	Approx. 15mm	Size of a 10-cent coin
2 to 6 years	Approx. 19mm	Size of a 20-cent coin
6 to 12 years	Approx. 22mm	Size of a 50-cent coin
12 years and above	Approx. 25mm	Size of a HK$1 coin

Important reminder: Regardless of which toothbrush you choose, bristles must be soft to avoid damaging tooth enamel and gums.

2. Manual vs. Electric Toothbrush: Technique Is What Matters

Many people hold the misconception that electric toothbrushes are always superior to manual ones. Professor Chu emphasises that both can clean effectively — what truly matters is brushing technique:

• Electric toothbrush: The high rotation speed makes it suitable for people with limited hand mobility. However, improper use — such as applying excessive pressure — may damage teeth and gums. The technique differs from that of a manual toothbrush, so it is advisable to consult a dentist first.

• Manual toothbrush: When the correct Bass brushing technique is properly applied, a manual toothbrush can achieve equally excellent cleaning results.

3. Specialised Tools: Single-Tufted Brushes and Interdental Brushes

A standard toothbrush cannot reach every corner of the mouth. In these cases, supplementary tools are needed:

1. Single-tufted brush: With an extremely small brush head, this tool is particularly useful for cleaning hard-to-reach areas such as misaligned teeth or wisdom teeth at the very back of the mouth.

2. Interdental brush:

   • Patients with periodontal disease: Gum recession creates wider gaps between tooth roots, and interdental brushes can effectively clean these proximal surfaces.

   • Orthodontic patients: For those wearing fixed braces, interdental brushes can effectively replace dental floss in cleaning the gaps around the metal wires.

4. 2026 Toothbrush Care and Replacement Recommendations

Proper toothbrush care helps prevent bacterial growth:

• Rinse thoroughly: After each use, rinse the toothbrush clean, removing all saliva, plaque, toothpaste, and food debris.

• Store correctly: Keep the brush head facing upright in a well-ventilated area to allow it to dry. Avoid contact with other toothbrushes to prevent cross-contamination.

• When to replace: Replace your toothbrush approximately every three months. If the bristles show signs of wear, or if the brush was used during an illness, replace it immediately.

---

Part 3: Frequently Asked Questions (FAQ)

• Q1: When buying a toothbrush in Hong Kong in 2026, does a more expensive brand necessarily mean better quality?

  • A: Not necessarily. As Professor Chu points out, brush head shape and handle design come down to personal preference. As long as the bristles are soft and the brush head size is appropriate for the user's age, an affordable toothbrush can work just as well.

• Q2: Why have small-head toothbrushes become so popular recently?

  • A: Small brush heads — such as single-tufted brushes — can manoeuvre more flexibly into the back of the mouth to clean wisdom teeth and areas where teeth overlap. This is particularly helpful in preventing bad breath and tooth decay at the back of the mouth.

• Q3: Is it really necessary to change your toothbrush after being sick with a cold?

  • A: Yes. During illness, viruses or bacteria may accumulate on the bristles. To avoid reinfection after recovery, it is recommended to replace your toothbrush with a new one.

※ The above are reference ranges compiled from public market data. Actual fees vary by clinic tier, dentist seniority, and case complexity, and do not represent any specific clinic's quote.