haisha ga oyashirazu o nukimasu.

direct object particle

Breakdown of haisha ga oyashirazu o nukimasu.

• が: subject particle
• 歯医者はいしゃ: dentist
• 親おや知しらず: a wisdom tooth

Questions & Answers about haisha ga oyashirazu o nukimasu.

How do you read this sentence?

It is read:

はいしゃ が おやしらず を ぬきます。

• 歯医者（はいしゃ） = dentist
• 親知らず（おやしらず） = wisdom tooth / wisdom teeth
• 抜きます（ぬきます） = pulls out, extracts

Why is が used after 歯医者?

が marks the grammatical subject, meaning the person who does the action.

So in this sentence:

• 歯医者が = the dentist is the one performing the action

A learner might expect は, but が is completely natural here when identifying who does the action.

Very roughly:

• 歯医者が親知らずを抜きます。 = The dentist will extract the wisdom tooth.
• 歯医者は親知らずを抜きます。 would sound more like As for the dentist, they extract wisdom teeth or would set up the dentist as the topic.

Why is を used after 親知らず?