A fogorvos a regionális központban dolgozik.

Both a words are the Hungarian definite article, equivalent to the.

• A fogorvos = the dentist
• a regionális központban = in the regional center

Hungarian repeats the article before each definite noun phrase, just as English does with the dentist and the regional center.

A useful extra point: before a vowel, a changes to az.

Yes. Fogorvos is a single compound noun:

• fog = tooth
• orvos = doctor

So literally it is something like tooth-doctor, which is the normal Hungarian word for dentist.

Hungarian forms many everyday nouns this way, so compounds are very common.

The ending -ban is a case ending meaning in or inside something. It is called the inessive case.

So:

• központ = center
• központban = in the center

In this sentence, a regionális központban means in the regional center.

Hungarian often uses case endings where English uses prepositions.

This is because of vowel harmony, a major feature of Hungarian.

The inessive case has two forms:

• -ban
• -ben

Which one you use depends on the vowel pattern of the word. With központ, the correct form is központban.

For learners, the safest approach is:

• learn the suffix pair
• learn which form each noun takes through exposure and dictionary examples

So the important practical fact here is simply that központ takes -ban.

Because Hungarian adjectives usually do not agree with the noun the way they do in many Indo-European languages.

So in:

• a regionális központban

the case ending goes on the noun központ, not on the adjective regionális.

That is very typical Hungarian structure:

• adjective unchanged
• noun carries the grammatical ending

So you get regionális központban, not a form where both words take the ending.

Dolgozik is the third person singular present tense form of the verb dolgozni = to work.

So:

• dolgozom = I work
• dolgozol = you work
• dolgozik = he/she works

Here it matches a fogorvos because the dentist is third person singular.

Because Hungarian word order is flexible and is strongly connected to information structure: topic, focus, and emphasis.

In this sentence, A fogorvos is the topic, and then the sentence says something about that person: a regionális központban dolgozik.

Putting the location before the verb is very natural in Hungarian. English tends to keep a more fixed order, but Hungarian often moves elements around depending on what is already known and what is being emphasized.

So this word order is not strange at all; it is normal Hungarian.

Yes, that is also grammatical.

Both versions can work, but they may sound slightly different in emphasis or rhythm.

• A fogorvos a regionális központban dolgozik.
• A fogorvos dolgozik a regionális központban.

The first one presents the location earlier, which is very natural if the location is part of the main information being given about the dentist.

So the original sentence is not just about grammar; it also reflects natural Hungarian sentence flow.

Because the article and the case ending do different jobs.

• a marks the noun phrase as definite: the
• -ban marks the relationship in

So Hungarian can have both at once:

• a központban = in the center / in the center that we mean

This is completely normal. The case ending does not replace the article.

Not exactly.

A very word-for-word breakdown is:

• A fogorvos = the dentist
• a regionális központban = in the regional center
• dolgozik = works

So the order is roughly:

The dentist in the regional center works.

That sounds odd in English, but it is fine in Hungarian. When translating, you should usually switch back to normal English order:

The dentist works in the regional center.