（单词翻译:单击）
Occlusal wear - loss of enamel1 on the biting surface of the teeth due to the abrasive2 action of chewing natural unprocessed food.
Odontoblast process - the extension of the cy lasm of an odontoblast which remains3 surrounded by dentine during tooth formation. The process is still an active part of the cell and contributes to the production of intratubular dentine in response to ageing, tooth wear or arrested caries.
Odontoblasts- cells lining4 the dental pulp5, derived6 from the dental papilla wich form the dentine of the tooth crown and root. New odontoblasts may become differentiated7 from less specialised pericytes in the pulp.
Occlusal interference - contact between opposing teeth during chewing, which prevents the other teeth touching8. In extreme lateral9 and protrusive10 positions of the jaw11, this would happen in most dentitions and be of no concern. When occlusal interference occurs close to the area of maximum tooth contact, it may be troublesome.
Oncogenes - genes12 which have the capacity if expressed to cause tumour13 formation.
Organelle - a structures within a cell which has a specific structure or function, such as thenucleus, endoplasmic reticulum, golgi apparatus14, lysosomes and mitochondria.. Cell organelles are a feature of eucaryotic cells.
