◼︎The last dentist I had been going to till the other day can deal with simple oral surgeries, but does not specialize in root canal treatment.
Therefore, I had to look for a dentist specializing in root canal treatment.

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Would you tell me if the sentences above are correct?

☘You don't have to change the sentences just for your preference unless they definitely need to be corrected. Thank you for understanding.☘

🚨 Would you just write down the parts that need to be corrected? If you write down every single sentence in my post from the first sentence till the last one, it’s not clear where the target parts are. Thank you for understanding.