Sometimes they contain rough abrasives that cause increased abrasionof the teeth at the gum line.
这些牙膏或牙粉含有粗槽的磨牙剂,使用龈线上的牙齿的磨损增加。
2
Excessive abrasion on the occlusive surface of artificial teeth in removable denture may lead to lower masticatory efficiency after being used a long time.
可摘义齿在长期使用后,常由于人造牙咬合面过度磨耗导致咬合接触不良、咀嚼效能降低。
3
The application ofabrasion resistant bead welding in bucket teethof excavator, shovel bucket of excavator and bucket teeth of loader was presented.