由于单纯机械摩擦作用而造成的牙齿硬组织慢性磨耗称为磨损。均匀适宜的磨损对牙周组织的健康有重要意义。例如：由于牙尖被磨损，减少了咀嚼时来自侧方的压力，使牙尖的形态和牙周组织的功能相互适应。此外牙冠的磨损可以减少临床牙冠的长度，保持冠根长度的协调，从而不至于由于杠杆作用而使牙周组织负担过重。
这是一种镍基软质合金，用于铸造冠、桥，因合金质软所以减轻对颌牙磨损，易操作。
This is a soft nickel-based alloy used for making dental crown and bridge. Since is relatively soft, it can reduce wear of paired jaw teeth. Its processing is easy.
这是一种镍基软质合金，用于铸造冠、桥，因合金质软所以减轻对颌牙磨损，易操作。
This is a soft nickel-based alloy used for making dental crown and bridge. Since the alloy is relatively soft, it can reduce wear of paired jaw teeth. Its processing is easy.
应当定期检查管钳，更换已磨损或有伤痕的钳牙及牙床。
Pipe wrenches should be inspected regularly. Replace the heel and jaw section if found to be defective or worn out.
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