רופאת השיניים אמרה שאם אפסיק לקנות מסטיק וסוכריות לפני השיעור, אולי לא יהיה לי שוב כאב שיניים ולא אצטרך סתימה נוספת.

רופאת השיניים means the female dentist.

A few things are happening here:

• רופאה = a female doctor
• רופא = a male doctor
• שיניים = teeth

So רופאת שיניים literally means doctor of teeth, i.e. dentist in the feminine form.

Because the sentence uses רופאת, the speaker is referring to a woman. If it were a male dentist, you would expect רופא השיניים or רופא שיניים, depending on context.

Also notice that this is a kind of construct relationship:

• רופאת שיניים = a dentist
• רופאת השיניים = the dentist

Hebrew often expresses professions this way.

אמרה is the past tense, feminine singular form of to say.

The subject is רופאת השיניים, which is feminine singular, so the verb must match:

• הוא אמר = he said
• היא אמרה = she said

So:

• רופאת השיניים אמרה = the dentist said

If the dentist were male, it would be אמר instead.

שאם is really two words joined together:

• ש־ = that
• אם = if

So:

• אמרה שאם... = she said that if...

This is very common in Hebrew. The ש־ often attaches directly to the next word.

So the structure is:

• אמרה = said
• שאם אפסיק... = that if I stop...

This is a very common Hebrew pattern.

After אם referring to a future condition, Hebrew usually uses the future tense, even where English often uses the present:

• אם אפסיק = if I stop
• literally: if I will stop

This is normal Hebrew grammar.

More examples:

• אם תלמד, תצליח = If you study, you’ll succeed
• אם אבוא, אתקשר = If I come, I’ll call

So אם אפסיק is exactly what you would expect in standard Hebrew.

Because להפסיק means to stop, and in Hebrew it is commonly followed by an infinitive:

• הפסקתי לעשן = I stopped smoking
• היא הפסיקה לדבר = she stopped talking
• אפסיק לקנות = I will stop buying

So:

• אפסיק = I will stop
• לקנות = to buy

Together: I will stop buying.

This is very similar to English.

Because את is used before a definite direct object, and מסטיק וסוכריות here are indefinite/general.

Compare:

• לקנות מסטיק וסוכריות = to buy gum and candies
• לקנות את המסטיק ואת הסוכריות = to buy the gum and the candies

In your sentence, the speaker is talking generally about buying gum and candy before class, not specific gum and specific candies. So no את is needed.

That is just how these words are naturally used here.

• מסטיק often works like a mass or generic noun, similar to gum in English.
• סוכריות is the plural of סוכרייה, meaning candy or sweet.

So מסטיק וסוכריות means something like:

• gum and candies
• or more naturally in English, gum and candy/sweets

This is not unusual at all.

לפני השיעור means before the lesson / before class.

Breakdown:

• לפני = before
• שיעור = lesson, class
• השיעור = the lesson, the class

Hebrew often uses the definite article where English may simply say before class. So:

• לפני השיעור can naturally mean before class
• literally it is before the class/lesson

This usually refers to a specific class known from context.

אולי means maybe or perhaps.

In this sentence it softens the result:

• אולי לא יהיה לי שוב כאב שיניים...
• maybe I won’t have a toothache again...

It shows possibility, not certainty. The dentist is not promising; she is saying it may help.

Its position in the sentence is flexible. Hebrew often places אולי before the clause it modifies.

Hebrew often expresses to have with יש / היה / יהיה + ל־.

So instead of saying something like I will not have, Hebrew says literally:

• לא יהיה לי = there will not be to me

Then you add the thing:

• לא יהיה לי כאב שיניים = I won’t have a toothache

This pattern is extremely important in Hebrew:

• יש לי = I have
• היה לי = I had
• יהיה לי = I will have

So the structure here is completely normal.

כאב שיניים is the usual expression for toothache as a condition or episode of pain.

Literally:

• כאב = pain
• שיניים = teeth

Together: tooth pain / toothache

You may also see כאבי שיניים, but that more often sounds like tooth pains or repeated pains in a more descriptive sense. In this sentence, כאב שיניים is the natural idiomatic choice for a toothache.

In לא יהיה לי שוב כאב שיניים, שוב means again.

The sentence means:

• I won’t have a toothache again

Hebrew word order with adverbs like שוב is fairly flexible, but this placement is very natural. It places again close to the whole event of having tooth pain again.

You could sometimes hear slight variations in word order, but the version in your sentence sounds standard and smooth.

Because it is part of the same future result of the condition.

The structure is:

• אם אפסיק... = if I stop...
• אולי לא יהיה לי... ולא אצטרך... = maybe I won’t have... and I won’t need...

So both results are in the future:

• יהיה = will be
• אצטרך = I will need

Also note:

• אצטרך comes from להצטרך / in modern usage the common citation form is להצטרך? Actually in everyday Hebrew people mostly think in forms like צריך / אצטרך, and the practical meaning is simply to need.

So:

• לא אצטרך = I won’t need

Because Hebrew verb forms usually already show the subject.

For example:

• אפסיק = I will stop
• אצטרך = I will need

The I is built into the verb form, so you do not need אני unless you want emphasis.

Compare:

• אם אפסיק = if I stop
• אם אני אפסיק = if I stop

The second version is more emphatic or contrastive.

סתימה means filling in the dental sense.

נוספת means additional, another, or one more.

So:

• סתימה נוספת = another filling / an additional filling

The adjective נוספת is feminine singular because סתימה is feminine singular.

Compare:

• ספר נוסף = another book
• בעיה נוספת = another problem
• סתימה נוספת = another filling

Because in Hebrew, adjectives usually come after the noun.

So:

• סתימה נוספת = a filling additional = another filling

This is the normal Hebrew order:

• ילד קטן = small boy
• מכונית חדשה = new car
• סתימה נוספת = another filling

Also, the adjective agrees with the noun in:

• gender
• number
• definiteness

It means the dentist, specifically a female dentist.

Literally it is the teeth doctor in the feminine form. A dental hygienist would usually be expressed differently.

So if a learner sees רופאת השיניים, the correct interpretation is the dentist.

It is natural Hebrew.

A native speaker would understand it immediately, and the grammar is standard:

• רופאת השיניים אמרה = the dentist said
• שאם אפסיק לקנות... = that if I stop buying...
• אולי לא יהיה לי שוב כאב שיניים = maybe I won’t have a toothache again
• ולא אצטרך סתימה נוספת = and won’t need another filling

The sentence is a bit long and carefully structured, so it feels slightly polished, but it is absolutely normal Hebrew.