يحشو طبيب الأسنان السن بعد المخدر الموضعي.

Because Arabic often prefers verb–subject–object order, especially in straightforward statements.

So:

• يحشو = fills
• طبيب الأسنان = the dentist
• السن = the tooth

This gives:

• يحشو طبيب الأسنان السن = The dentist fills the tooth

Arabic can also use subject–verb–object order:

• طبيب الأسنان يحشو السن

That is also correct, but starting with the verb is very common in Modern Standard Arabic and often sounds more neutral or narrative.

يحشو comes from a root related to stuffing or filling something.

In general Arabic, it can mean:

• to stuff
• to pack
• to fill

In a dental context, it is commonly used for filling a tooth. So here يحشو السن means:

• he fills the tooth
• more naturally in English: he puts a filling in the tooth

This is a good example of a verb whose most natural English translation depends on context.

This is an iḍāfa construction, often called a genitive construction or noun-noun phrase.

• طبيب = doctor
• الأسنان = the teeth

Together:

• طبيب الأسنان = doctor of the teeth = dentist

In an iḍāfa:

1. the first noun usually does not take الـ
2. the second noun can be definite, and that makes the whole phrase definite

So:

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

That is why طبيب appears without الـ.

That is just how Arabic expresses this profession.

• أسنان = teeth
• طبيب الأسنان literally = doctor of the teeth

English and Arabic do not always build profession names the same way. Arabic often uses this kind of noun phrase literally, while English uses a special profession word like dentist.

So even though it is literally doctor of the teeth, the normal translation is simply dentist.

السن means the tooth, while سن means a tooth.

Using السن suggests a specific tooth is being talked about, probably one already known from context, such as the tooth being treated.

So:

• يحشو طبيب الأسنان السن = The dentist fills the tooth
• يحشو طبيب الأسنان سنًّا = The dentist fills a tooth

In real-life contexts like medical or dental procedures, definiteness often sounds natural because the tooth is specific and understood.

بعد means after.

In this sentence:

• بعد المخدر الموضعي = after the local anesthetic

Grammatically, بعد is followed by a noun phrase in the genitive.

So the phrase is structured as:

• بعد
  • noun phrase

Examples:

• بعد الدرس = after the lesson
• بعد العلاج = after the treatment
• بعد المخدر الموضعي = after the local anesthetic

In fully vocalized Arabic, the words after بعد would show genitive endings.

Because الموضعي is an adjective describing المخدر, and Arabic adjectives normally agree with the noun they describe.

Here the noun is:

• المخدر = the anesthetic

And the adjective is:

• الموضعي = local

Since المخدر is:

• masculine
• singular
• definite

the adjective must match it, so we get:

• المخدر الموضعي = the local anesthetic

This matching is a very important Arabic pattern. Adjectives usually agree in:

• definiteness
• gender
• number
• case

Something is slightly implied.

Literally, بعد المخدر الموضعي means after the local anesthetic, but in natural medical English we might expect something like:

• after the local anesthetic is given
• after administering the local anesthetic
• after local anesthesia

Arabic often allows this kind of compressed expression when the meaning is obvious from context.

So the sentence is natural, but the fuller idea is something like:

• The dentist fills the tooth after giving the local anesthetic.

Yes.

يحشو is:

• third person
• masculine
• singular
• imperfect tense

And طبيب الأسنان refers to:

• one dentist
• masculine singular

So the agreement is correct.

A useful point: in verb-first sentences, Arabic often keeps the verb singular when the subject comes after it, especially in standard usage.

So:

• يحشو طبيب الأسنان السن = The dentist fills the tooth

is exactly what you would expect.

Because everyday written Arabic usually leaves short vowels and case endings unwritten.

So you see:

• يحشو طبيب الأسنان السن بعد المخدر الموضعي

But in a fully vocalized version, the endings would be clearer. Roughly, it would look like:

• يَحْشُو طَبِيبُ الأَسْنَانِ السِّنَّ بَعْدَ المُخَدِّرِ المَوْضِعِيِّ

That shows:

• طبيبُ as the subject
• الأسنانِ as the second part of the iḍāfa
• السِّنَّ as the direct object
• المخدرِ الموضعيِّ after بعد, so in the genitive

Learners often do not see these endings in normal print, but they are still part of the grammar.

Yes, absolutely.

That version uses subject–verb–object order:

• طبيب الأسنان يحشو السن بعد المخدر الموضعي

It means the same thing overall. The difference is mostly one of style, emphasis, or information flow.

Very roughly:

• يحشو طبيب الأسنان... = more neutral, event-focused, common in formal Arabic
• طبيب الأسنان يحشو... = starts by highlighting the subject, the dentist

Both are correct.

The verb is from the root ح ش و.

The basic past form is:

• حشا = he stuffed / he filled

The imperfect form is:

• يحشو = he stuffs / he fills

So the pattern here is:

• past: حشا
• present/imperfect: يحشو

This is useful because many Arabic verbs change shape between past and imperfect forms, and learners often want to connect the dictionary form with the form they actually see in sentences.

Yes. سِنّ means tooth, and with الـ it becomes السِّنّ or in unvocalized writing السن.

Plural:

• أسنان = teeth

So you now have a useful little set:

• سِنّ = a tooth
• السِّنّ = the tooth
• أسنان = teeth
• طبيب الأسنان = dentist

That is a very common vocabulary group in health-related Arabic.