طبيب الأسنان جاهز، كما أن كرسي الأسنان نظيف.

Yes—literally, طبيب الأسنان means doctor of the teeth. This is a very common Arabic way of expressing professions and compound nouns.

It is an iḍāfa (genitive construction), where:

• طبيب = doctor
• الأسنان = the teeth

So طبيب الأسنان means the doctor associated with teeth, i.e. the dentist.

This is more natural in Arabic than trying to create a single-word equivalent of dentist.

Because طبيب الأسنان is an iḍāfa construction. In an iḍāfa:

• the first noun usually does not take الـ
• the second noun may be definite with الـ
• the whole phrase can still be definite

So:

• طبيب أسنان = a dentist / tooth doctor
• طبيب الأسنان = the dentist / the doctor of the teeth

Even though طبيب has no الـ, the whole phrase is definite because الأسنان is definite.

Using الأسنان makes the whole iḍāfa phrase definite.

Compare:

• طبيب أسنان = a dentist
• طبيب الأسنان = the dentist

In Arabic, definiteness in an iḍāfa is often determined by the second noun. Since الأسنان has الـ, the whole phrase becomes definite.

Because Arabic usually does not use a present-tense verb meaning is/are in simple sentences like this.

So:

• طبيب الأسنان جاهز literally looks like the dentist ready
• but it means The dentist is ready

This is a normal nominal sentence in Arabic:

• طبيب الأسنان = subject
• جاهز = predicate

If you wanted past or future, Arabic would use a verb, but in the present it is usually omitted.

Because جاهز is the predicate adjective, not an adjective directly modifying the noun.

In other words:

• طبيب الأسنان جاهز = The dentist is ready
• طبيب الأسنان الجاهز = the ready dentist

That is a big difference.

When an adjective simply describes the subject as the predicate of the sentence, it usually comes without الـ.

The structure tells you.

• طبيب الأسنان جاهز
  = The dentist is ready

But if Arabic wanted to say the ready dentist, the adjective would have to match the noun in definiteness:

• طبيب الأسنان الجاهز

So the lack of الـ on جاهز shows that it is the predicate, not a noun modifier.

كما أن is a connector meaning something like:

• and also
• moreover
• furthermore
• as well as that

In this sentence, it links the two ideas smoothly:

• طبيب الأسنان جاهز
• كما أن كرسي الأسنان نظيف

So the sense is: The dentist is ready, and the dentist’s chair is also clean.

It is a bit more formal than just using و.

That is a very common learner question. In كما أن, the أن is part of a fixed connective expression. You usually do not translate it word-for-word.

So although أن often means that, in كما أن the whole phrase functions together as a discourse connector, such as:

• moreover
• and also
• furthermore

It is better to learn كما أن as one unit here, rather than trying to translate each word separately.

كرسي الأسنان literally means chair of the teeth, but naturally it means the dental chair or the dentist’s chair.

It is also an iḍāfa construction:

• كرسي = chair
• الأسنان = the teeth

So Arabic uses the same structure for both:

• طبيب الأسنان = dentist
• كرسي الأسنان = dental chair / dentist’s chair

This is very common in Arabic for things related to a field or function.

For the same reason as جاهز.

In:

• كرسي الأسنان نظيف

نظيف is the predicate: is clean.

If you said:

• كرسي الأسنان النظيف

that would mean the clean dental chair, not the dental chair is clean.

So:

• no الـ = predicate adjective
• with الـ = adjective modifying the noun

Because that is the normal order in Arabic.

When an adjective modifies a noun, it usually comes after it:

• كرسي نظيف = a clean chair
• الكرسي النظيف = the clean chair

In your sentence, though, نظيف is not directly modifying كرسي الأسنان inside one noun phrase. It is acting as the predicate:

• كرسي الأسنان نظيف = The dental chair is clean

So it still comes after the noun phrase, but here it is the second part of the sentence.

Yes. Arabic adjectives agree in gender with the noun they describe or refer to.

So:

• طبيب الأسنان جاهز = The male dentist is ready
• طبيبة الأسنان جاهزة = The female dentist is ready

Likewise:

• كرسي الأسنان نظيف stays masculine, because كرسي is a masculine noun.

Because كرسي is grammatically masculine in Arabic. Nouns in Arabic have grammatical gender, and adjectives must agree with them.

So you say:

• كرسي نظيف = a clean chair

not:

• كرسي نظيفة

The adjective must match the noun’s gender.

الأسنان is plural: the teeth.

That is completely normal here. English also often uses a plural in similar expressions:

• teeth
• dental
• tooth depending on the phrase

Arabic happens to say:

• doctor of the teeth
• chair of the teeth

This does not mean there are multiple dentists or multiple chairs. The plural simply refers to the category teeth.

Yes, in many cases you could say:

• طبيب الأسنان جاهز، وكرسي الأسنان نظيف.

That means: The dentist is ready, and the dental chair is clean.

Using كما أن makes the connection a bit more formal or polished, closer to:

• moreover
• and also
• in addition

So both are possible, but كما أن has a slightly more formal written tone.

Yes, in fully vocalized formal Arabic there would be case endings, but they are usually not written in ordinary text.

For example, in careful fully vocalized MSA you might see:

• طبيبُ الأسنانِ جاهزٌ، كما أنَّ كرسيَّ الأسنانِ نظيفٌ.

A few notes:

• طبيبُ would be nominative as the subject
• الأسنانِ is genitive because of iḍāfa
• جاهزٌ is nominative as the predicate
• after أنَّ, كرسيَّ becomes accusative
• الأسنانِ remains genitive in the iḍāfa
• نظيفٌ is the predicate of أنَّ

But in normal unvocalized writing, learners usually first focus on the structure and meaning rather than the endings.

Because أنَّ causes its noun to be in the accusative case.

In كما أن كرسي الأسنان نظيف, the phrase after أنَّ works like a small clause:

• كرسي الأسنان = the noun part
• نظيف = the predicate

So in full case marking:

• أنَّ كرسيَّ الأسنانِ نظيفٌ

The noun governed by أنَّ is accusative, which is why كرسيَّ would take that ending.

Arabic often repeats the related noun in separate iḍāfa expressions when that is the clearest and most natural wording.

So:

• طبيب الأسنان = the dentist
• كرسي الأسنان = the dental chair

Using the repeated noun keeps both expressions clear and idiomatic. A pronoun would sound less natural here unless the surrounding context made it very obvious.

A simple pronunciation guide is:

• ṭabību l-asnān jāhiz, kamā anna kursiyya l-asnān naẓīf

If you want a more natural pause:

• ṭabību l-asnān jāhiz, kamā anna kursiyya l-asnān naẓīf.

A few helpful sounds:

• ṭ = an emphatic t
• ḥ would be a strong h, though it does not appear here
• ẓ in نظيف is an emphatic z/dh-like sound depending on how you hear it
• j in جاهز is the usual MSA j sound

Yes, especially because of كما أن. The sentence is very natural in Modern Standard Arabic, especially in written or formal contexts.

In everyday speech, many speakers would use something simpler, such as just و for and. But for MSA learning, this sentence is perfectly normal and useful.

So the overall style is:

• clear
• correct
• somewhat formal/polished rather than casual speech