Dental composite resin and plough: what they have in common

1. Step 1. Dental composite resin — is part of — Dental filling. A polymer with a filler.
2. Step 2. Dental filling — is made of — Silver. Silver in the amalgam.
3. Step 3. Silver — is material for — Syringe. Early needles were silver.
4. Step 4. Syringe — has part — Needle. A hollow needle.
5. Step 5. Needle — uses — Wedge. The point pushes the material apart like a wedge.
6. Step 6. Wedge — is used in — Plough. The ploughshare parts the soil like a wedge.

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