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can titanium be scratched
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PVC, or Polyvinic Chloride, is a type of plastic, not rubber. It's a synthetic thermoplastic material made from polymerizing vinyl chloride, widely used for its durability, water resistance, and flexibility when plasticizers are added. Rubber, on the other hand, can be natural, derived from latex sap of rubber trees, or synthetic, made from petroleum-based chemicals. Though PVC can be made to mimic the flexibility and softness of rubber with additives, their chemical compositions and properties are distinct. PVC is used in a range of products from pipes and cables to clothing and flooring, while rubber is commonly used for tires, seals, and elastic bands.
A polypropylene lined cap is a closure type designed for containers, combining the physical strength and chemical resistance of polypropylene (a thermoplastic polymer) with an added liner material for enhanced sealing properties. This type of cap is typically used in pharmaceutical, chemical, and food and beverage industries, where ensuring product integrity and preventing contamination or leakage is crucial. The liner inside the cap provides an additional barrier, which can be beneficial for products sensitive to air, moisture, or chemical exposure. There are various liner materials available, each catering to different sealing needs. Polypropylene caps are favored for their durability, chemical resistance, and versatility, making them suitable for a wide range of applications.
A Preventive Resin Restoration (PRR) is a minimally invasive dental treatment aimed at preserving tooth structure and preventing decay. It involves the application of a resin material to the pits and fissures of molars, areas prone to decay, without removing a substantial amount of tooth structure. The steps include cleaning the tooth surface, isolating the tooth to keep it dry, applying an acid etch to roughen the surface for better bonding, rinsing and drying the tooth, applying the resin material, and curing it with a special light. PRR is ideal for teeth at high risk of decay but without cavities or with minimal decay. It's an excellent preventive measure that preserves tooth integrity and prevents further dental issues.
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