Tandfyldningen er stadig på plads.

Because Danish usually writes compound nouns as a single word.

• tand = tooth
• fyldning = filling

Together, tandfyldning means tooth filling / dental filling.

This is very common in Danish. English often uses two words where Danish uses one:

• tandlæge = dentist
• tandbørste = toothbrush
• tandpine = toothache

So tandfyldningen is not unusual at all — it is the normal Danish spelling.

The ending -en marks the noun as definite singular, meaning the.

So:

• en tandfyldning = a tooth filling
• tandfyldningen = the tooth filling

In Danish, definiteness is often added to the end of the noun instead of using a separate word like English the.

It is an en word:

• en tandfyldning
• tandfyldningen

That is why the definite ending is -en and not -et.

Because Danish usually expresses the by adding a definite ending to the noun.

So instead of something like the filling, Danish normally says fyldningen or tandfyldningen.

A separate definite word such as den is mainly used when there is an adjective or other modifier:

• tandfyldningen = the filling
• den gamle tandfyldning = the old filling

Stadig means still in the sense of continuing to be true.

So it shows that the situation has not changed: the filling remains where it should be.

Compare:

• Han bor stadig i Aarhus. = He still lives in Aarhus.
• Det regner stadig. = It is still raining.

That is normal Danish word order in a main clause.

Here the structure is:

• Tandfyldningen = subject
• er = finite verb
• stadig = adverb
• på plads = complement / phrase describing the state

So the pattern is:

subject + finite verb + adverb + rest

This is very common in Danish:

• Hun er stadig hjemme.
• Bilen er stadig dyr.

Literally, på plads looks like in place / in position.

In this sentence, it means that the filling is still where it should be and has not come loose or fallen out.

It is a very natural phrase for something that remains correctly positioned.

You can also use på plads in other contexts:

• Brikkerne er på plads. = The pieces are in place.
• Alt er på plads. = Everything is in order / everything is ready.

Yes, very much so.

It is a common Danish expression meaning things are:

• physically in the right position, or
• properly arranged, sorted, or settled

So in this sentence, it sounds completely natural. A Dane would understand it as the filling is still sitting properly.

Yes, if the context already makes it clear that you are talking about a dental filling.

• Fyldningen er stadig på plads. = The filling is still in place.

Adding tand- makes it more explicit. Without context, fyldning could in some situations mean another kind of filling, so tandfyldning is more precise.

Yes — especially the y sound in fyld-.

The Danish y is not a normal English vowel. A useful trick is:

1. Shape your lips as if you are saying oo
2. Try to say ee at the same time

That gets you close to the Danish y sound.

Also, spoken Danish often smooths sounds together, so long compound words like tandfyldningen may sound more compressed than you expect from the spelling.

Sometimes, but stadig is the most straightforward choice here.

• stadig focuses on a state that continues
• endnu can sometimes mean still or yet, but it often has a slightly different feel depending on context

In this sentence, Tandfyldningen er stadig på plads sounds very natural and neutral.

You would use the indefinite noun:

• En tandfyldning er stadig på plads.

That means a tooth filling is still in place.

The main difference is:

• tandfyldningen = the filling
• en tandfyldning = a filling

The plural forms are:

• tandfyldninger = fillings
• tandfyldningerne = the fillings

So you could say:

• Tandfyldningerne er stadig på plads. = The fillings are still in place.

This is useful because Danish noun endings change with number and definiteness, not just with articles.