I have question about lateral incisor tooth. Worn down from grinding on one side?

Grinding. Excessive wear to a tooth is usually due to grinding of the teeth. This can occur at night without conscious effort. Best to see your dentist for an evaluation and treatment plan.
????? Not quite sure what you are asking but.....It is possible that you have a bite that allows you to selectively wear down a single tooth. The best thing you could do is have a dentist analyze your bite and if you are wearing it down have your bite adjusted or perhaps have an occlusal bite guard made to be worn at nite, during the day or both. Earl.