haisya ga okuba no tumemono to kamiawase wo kakuninsimasu.

It is read:

はいしゃ が おくば の つめもの と かみあわせ を かくにんします。

Word by word:

• 歯医者 = はいしゃ = dentist
• が = subject marker
• 奥歯 = おくば = back tooth / molar
• の = linking particle, like of
• 詰め物 = つめもの = filling
• と = and
• 噛み合わせ = かみあわせ = bite / how the teeth meet
• を = object marker
• 確認します = かくにんします = checks / will check / confirms

Also, Japanese is normally written without spaces:

歯医者が奥歯の詰め物と噛み合わせを確認します。

が marks the grammatical subject of the sentence: the person doing the action.

So here:

• 歯医者が = the dentist is the one who checks

A very literal structure is:

• Dentist
  • subject marker
    • filling and bite
      • object marker
        • checks

In many beginner sentences, が is used to clearly mark who does the action.

Yes, 歯医者は奥歯の詰め物と噛み合わせを確認します is also grammatical.

The difference is mainly nuance:

• 歯医者が focuses on the dentist as the subject
• 歯医者は makes the dentist the topic, like as for the dentist...

So:

• 歯医者が確認します = The dentist is the one who will check
• 歯医者は確認します = As for the dentist, they will check

In isolation, either can work. が often sounds a bit more neutral when simply stating who does the action.

Because 詰め物 and 噛み合わせ are joined by と, so they form one combined object.

• 詰め物と噛み合わせを確認します = check the filling and the bite

Japanese often puts the particle only once after the whole list.

So this is normal:

• A と B を V = do V to A and B

You do not need:

• 詰め物を と 噛み合わせを That would be unnatural here.

Literally, it is something like:

• the filling of the back tooth
• or the back-tooth filling

Here, の links 奥歯 and 詰め物.

This kind of の can express a relationship like:

• possession
• category
• location/association
• description

In this sentence, 奥歯の詰め物 means the filling in the molar / back tooth.

It does not necessarily sound as stiff as of does in English. Japanese uses の very broadly.

By itself, Japanese nouns usually do not show singular vs. plural clearly.

So 奥歯 can mean:

• a back tooth
• back teeth
• a molar
• molars

The exact meaning depends on context.

In this sentence, because it is connected to 詰め物 in the singular-looking phrase 奥歯の詰め物, many learners will naturally understand it as the filling in a back tooth. But Japanese does not force that distinction as strongly as English does.

詰め物 means a filling, especially in a dental context.

It comes from the verb 詰める meaning to stuff, to pack, or to fill.

So 詰め物 is literally something that is filled/inserted.

In dentistry, it refers to the material used to fill a cavity or repaired part of a tooth.

噛み合わせ refers to how the upper and lower teeth meet when you bite.

Depending on context, it can be translated as:

• bite
• bite alignment
• occlusion

It comes from:

• 噛む = to bite
• 合わせる / 合わせ = to match, bring together

So the idea is the way the teeth come together when biting.

確認します means check, confirm, or make sure.

It sounds a bit more professional and deliberate than just 見ます (look at).

Compare:

• 見ます = look at
• 調べます = examine / investigate
• 確認します = check / confirm / verify

In a dental setting, 確認します sounds very natural because the dentist is not just looking casually; they are checking the condition of the filling and bite.

It can be either, depending on context.

確認します is the polite non-past form, and Japanese non-past can mean:

• checks / is checking in a habitual or general sense
• will check in a future context

So this sentence could mean:

• The dentist checks the filling and bite
• The dentist will check the filling and bite

In medical or appointment contexts, English often translates it as will check.

Japanese often leaves out information that is obvious from context.

In a dental situation, it is already clear that the dentist is checking the patient’s filling and bite, so Japanese usually does not need to say:

• あなたの奥歯の詰め物
• あなたの噛み合わせ

Adding あなたの would often sound unnecessary unless there is a special reason to emphasize whose it is.

This is very common in Japanese: pronouns and possessives are omitted when understood.

The basic order here is very natural:

• subject + object + verb

So:

• 歯医者が = subject
• 奥歯の詰め物と噛み合わせを = object
• 確認します = verb

Japanese word order is somewhat flexible, but the verb usually comes at the end.

You could move some parts around for emphasis, but this version is the most straightforward and natural for learners.

Because 奥歯 is directly connected to 詰め物 by の.

So the structure is:

• 奥歯 の 詰め物 = the filling of the back tooth = the filling in the molar

Here, 奥歯 is not acting as a separate subject or object. It is just modifying 詰め物.

That is why it does not take a particle like が or を on its own.

Yes. It sounds like a natural, polite, straightforward sentence, especially in a medical or dental context.

It has the kind of neutral, explanatory tone you might see in:

• a textbook
• a clinic explanation
• appointment instructions
• a treatment description

In real conversation, a speaker might sometimes omit the subject if it is obvious, for example:

• 奥歯の詰め物と噛み合わせを確認します。

That would often sound even more natural in context, because Japanese frequently drops the subject when everyone already knows who is acting.