Silicone, hybrid and nylon differ in material and replacement schedule. Check the specific generation.
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What matters for this question
- FOREO’s ISSA manual describes hybrid and silicone-oriented heads with intervals unlike a standard nylon-bristle refill. Keep the exact generation and head type together.
- Do not apply one three-month replacement rule to all materials; inspect the manufacturer’s manual and visible wear.
How to apply it
Materials can alter cleaning feel and manufacturer replacement timing, but the catalog does not rank their clinical performance. FOREO ISSA 4 documentation distinguishes Hybrid and Sensitive options. A nylon Sonicare refill cannot be assumed to fit an ISSA handle because both are electric toothbrushes.
Product records to compare
| Head family | Example fitting handle | Bristle wording | Catalog market |
|---|---|---|---|
| FOREO ISSA 4 Hybrid Brush Head | FOREO ISSA 4 | Not recorded | global |
| Philips Sonicare C3 Premium Plaque Control | Philips Sonicare 2 Series plaque control (family) | Not recorded | US |
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Sources and scope
- FOREO ISSA 4 manual and replacement head guidance · manufacturer; web full text; retrieved 2026-10-30
- C3 HX9043/25 · manufacturer; web search excerpt; retrieved 2026-10-30
- Philips brush-head system guide · manufacturer; web search excerpt; retrieved 2026-10-30