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    John Zhang, DDS

    4.8 (58 reviews)
    Closed 8:00 am - 5:00 pm

    Services - John Zhang, DDS

    Cavity treatment

    Dental exams

    Tooth filling replacement or repair

    John Zhang, DDS Photos

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    Recommended Reviews - John Zhang, DDS

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    28 days ago

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    6 months ago

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    3 years ago

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    2 years ago

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    3 years ago

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    3 years ago

    My new Dentist! Very friendly staff. Office is local and very nice. Great experience here

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    5 years ago

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    2 years ago

    The whole family has been going to Dr. Zhang for years. Staff is like family and location is very convenient.

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    3 years ago

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    3 years ago

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    3 years ago

    Wonderful staff!!! I feel so comfortable with them knowing I'm not getting scammed into unnecessary procedures. Thank you everyone !

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    3 years ago

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    5 years ago

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    5 years ago

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    3 years ago

    Great Dr. Very knowledgeable, educated and well spoken. We feel 100% comfortable taking our daughter there.

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    7 years ago

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    9 years ago

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    7 years ago

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    7 years ago

    The service is great! People are super nice here. Dr Zhang is always patient and very about every treatment. Strongly recommended.

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    4 years ago

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    5 years ago

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    4 years ago

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    8 years ago

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    6 years ago

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    10 years ago

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    8 years ago

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    7 years ago

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    8 years ago

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    6 years ago

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    8 years ago

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    8 years ago

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    6 years ago

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    8 years ago

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    8 years ago

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    6 years ago

    Dr Zhang does great work and is a nice guy. Been going to him for several months now . Him and his office do a great job

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    6 years ago

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    6 years ago

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    11 years ago

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    9 years ago

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    Page 1 of 2

    Ask the Community - John Zhang, DDS

    Review Highlights - John Zhang, DDS

    Sheila his front desk secretary is amazing and goes out of her way to help and always has such a great attitude.

    Mentioned in 7 reviews

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    Upland Endodontix

    Upland Endodontix

    4.8(86 reviews)
    2.7 mi

    Alright, before you read this let me say I totally understand and agree that you normally would not…read moreassociate a dental procedure to a pleasant experience but hear me out on this. I had been having a tooth ache for months and my regular dentist (who is fantastic- Dr. Robin Su) told me that I more than likely needed a root canal as my tooth had been cracked and it was not going to improve. Without boring you with the details, Dr. Robin referred me to Upland Endodontix. So throughout my life, all I've heard was that root canals are terrible and literally everyone had nothing but negative things to say about them. I mean people have even said "I'd rather have my appendix removed before having a root canal". Well, needless to say I was not overly excited about this and even contemplated just living with the pain. Well, fast forward. I walk into the office and was pleasantly surprised by the friendly staff. Ashley and Alexis handled all the paperwork and were very friendly and professional. After only a few moments, I was brought back where I met Al, who took care of me the entire time. He was very helpful and explained everything in detail. Dr. Vu was also very professional and completed the process in about 30 minutes. Seriously, a root canal in 30 minutes. Now let me tell you I hate needles. I mean Ive had several big surgeries and before this, I would have put this right up at the top- total sissy. But as for the process, I could not have been more wrong. When I say this entire process was nothing worse than having a normal cavity filling, that's how I would describe it. Sure it's more in depth but the way they handled was very straight forward- you get a few shots, they cover your face, and do some drilling and filling. Anyways, this review is already too long but I had such a positive experience I felt compelled to pass along. The entire staff was top notch and if I could give them 10 Stars I would. I absolutely, without a doubt, highly recommend Upland Endodontix.

    My wife developed sudden, severe tooth pain that quickly turned into intense headaches affecting…read morethe entire side of her face. What started on a Saturday night became an hour-by-hour struggle. We first saw a dentist on Monday, where they diagnosed an infection, prescribed amoxicillin and 800 mg ibuprofen, and recommended extracting the tooth. Unfortunately, the medication provided very little relief, and the pain continued. We sought a second opinion on Wednesday. That office recommended a root canal but didn't have an endodontist available and couldn't see her until the following week. With my wife still in significant pain, I spent most of the night and early am searching specifically for an endodontist who could see her as soon as possible. We came across Upland Endodontix. We had actually been considering another office, but after reading reviews, I didn't feel as confident. The professionalism and consistency of the reviews here gave us a much better feeling, so we reached out. They contacted us first thing Thursday morning and scheduled her for a 2:00 p.m. appointment that same day. From the moment we arrived, everyone was professional, kind, communicative, and genuinely caring. The doctor explained everything clearly, treated her very gently, and was able to save the tooth with a root canal. The difference afterward was incredible. Before treatment, even with antibiotics and prescription-strength ibuprofen, the pain never really went away--it was only slightly dulled. After the procedure, the same medications actually eliminated her remaining discomfort, allowing her to finally begin recovering. She was in and out in about 45-50 minutes, and the experience couldn't have gone better. We're incredibly grateful to the entire team for fitting her in so quickly and providing such excellent care. If I ever need an endodontist myself, this is exactly where I'll go. I highly recommend Upland Endodontix.

    Photos
    Upland Endodontix - The doctor and staff took great care of my mom.

    The doctor and staff took great care of my mom.

    Upland Endodontix - Beautiful office

    Beautiful office

    Upland Endodontix - Waiting for Dr.  Byun to do my Root Canal..

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    Waiting for Dr. Byun to do my Root Canal..

    Barsoum Dental Upland - Barsoum Dental team members at the Mountain Ave office grand opening

    Barsoum Dental Upland

    4.8(700 reviews)
    2.6 mi
    Emergency services
    Free consultations

    If I could give 10 stars I would! I cannot begin to describe how happy I am with the service here…read more Not only is this place aesthetically pleasing, the customer service is exceptional! Everyone went above and beyond to make sure I felt comfortable and well taken care of. This is my new dentist for life!

    I am extremely disappointed with the care I received at Barosum Dental in Upland. My experience…read moreleft me feeling unheard, misdiagnosed, and ultimately traumatized. While I was out of town on July 12, 2026, I developed severe pain on the lower right side of my mouth. As soon as I returned, I scheduled an emergency appointment for July 15. I also had a previously scheduled deep cleaning appointment for July 16. During my emergency visit, the female dentist appeared to minimize my concerns. Instead of focusing on the area where I was experiencing pain, she asked whether I had seen an endodontist for a referral from a year earlier and questioned a shadow in my gums that had existed for over 30 years on the opposite side of my mouth. I requested X-rays, and a 360-degree scan was performed. After reviewing the images, she told me everything looked fine, that I had no cavities, gave me Sensodyne toothpaste for tooth sensitivity, and said I was cleared to proceed with my deep cleaning the following day. Later that same day, the office coordinator called and told me they wanted me to see the endodontist before my cleaning. I went to the appointment, and within five minutes the endodontist identified a cavity. My primary dentist confirmed the finding and recommended that my wisdom tooth be extracted. I was extremely upset that my condition had been missed during my emergency visit. I asked to speak with the female dentist who had evaluated me, but she was unavailable. I scheduled the extraction for July 17, 2026. Because I had previously had a successful experience using nitrous oxide during another tooth extraction, I requested it again to help manage my anxiety. I was numbed for the procedure and was told I was receiving nitrous oxide, but I never felt its effects. I noticed the dental assistant was on the phone for much of the procedure, and it appeared that no one ensured the nasal cannula was properly positioned. I informed both the oral surgeon and the assistant that I did not feel like I was receiving the nitrous oxide, but my concerns were dismissed. I remained anxious throughout the procedure, and the extraction was ultimately unsuccessful. I left the office emotional, traumatized, and deeply disappointed. This was the worst dental experience I have ever had. As healthcare providers, listening to patients is essential. I repeatedly expressed my concerns and felt they were ignored every step of the way. I will not be returning to this office. I also plan to verify that my insurance was not billed for procedures that were not completed, including the deep cleaning and the unsuccessful tooth extraction. I hope this review encourages the office to improve communication, patient care, and attention to patient concerns so that others do not have a similar experience.

    Photos
    Barsoum Dental Upland - Barsoum Dental Upland's front desk.

    Barsoum Dental Upland's front desk.

    Barsoum Dental Upland - Barsoum Dental team members at the Mountain Ave office grand opening

    Barsoum Dental team members at the Mountain Ave office grand opening

    Barsoum Dental Upland - Exterior of office with Grand Opening balloons

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    Exterior of office with Grand Opening balloons

    Inland Empire Endodontics

    Inland Empire Endodontics

    5.0(20 reviews)
    6.1 mi

    Highly recommend this dental office, especially Dr. Chen, for excellent root canal treatment. Both…read moreof my parents were treated here and had great experiences. My father has a complex medical history and difficulty tolerating long procedures. Dr. Chen was extremely patient and professional. The root canal was done on a tooth under an existing bridge, which required great skill, and the procedure went smoothly with minimal discomfort. My mother also had a root canal on a wisdom tooth on one side. Dr. Chen handled it with great care, and her recovery was smooth. Thank you as well to Dr. Leong for the additional care and support, and special thanks to the front desk ladies for being so kind and helpful with appointments and paperwork. The entire team was professional, caring, and efficient. We felt our parents were in very good hands and would absolutely recommend this office.

    Five stars! I had a root canal done here 2 years ago and now I needed another one for a similar…read morereason. Tooth was filed down by my dentist and apparently too close to trigger the nerve. Thank God for my endodontist! I remembered the ease I felt with my previous situation and went back to This location. It's the number one specialist for root canals. A major procedure completed with the most possible ease and after care instructions explained with care also. Highly recommend if you want your root canal done with ease and precise treatment. Advanced technology used and I had zero pain after the lidocaine wore off and was able to eat same day also. (Chewed on other side of teeth of course just to be safe) lol, but overall I'd return... again a 3rd time if needed. Thank you Dr. Chen

    Photos
    Inland Empire Endodontics - Molar 30 root canal performed. Healing time was minimal and I'm back to cheesing hard.

    Molar 30 root canal performed. Healing time was minimal and I'm back to cheesing hard.

    Inland Empire Endodontics - Dentista

    Dentista

    Inland Empire Endodontics - Siéntate no tengas miedo

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    Siéntate no tengas miedo

    Claremont Modern Dentistry - Looking for a family dentist in Claremont, CA? You have come to the right spot!

    Claremont Modern Dentistry

    3.8(191 reviews)
    1.2 mi

    I really don't enjoy going to the dentist- who does? But this dental office has become my family's…read moredentist because their staff is friendly and accommodating. I quit my last dentist because I could never get an appointment in a reasonable amount of time. During my last visit, Savanna helped me out front and was able to help me schedule all of my appointments with a smile and great attitude.

    In August I went in for a teeth cleaning. After the exrays were done I spoke to the Dentist Asian…read morelady sorry I can't remember her name but she did my root canal and permanent crown a year ago. She informed me that the crown she did had a chip in it and asked me what I chewed on and If I knew it was there?? I told her I didn't. I didn't have any pain . She said it needed to be redone and it would cost me 1400+to get it done! I said it had barely been a year since she did it and they should fix it. They've done 4 root canels and permanent crowns in the last 4 years and totaling more than 7k. Nothing like this had happened to any of the other ones. It's impossible not to eat and chew. But for this to happen within a year is not good. Now they want to charge me 1400+ to fix it. They should make me whole. Obviously the product that they made this crown with was not as good as the previous ones. I have been going here for 5 years plus but now I feel like they are making it my fault because I chewed something that made this hairbrush happen. She also informed me that after having crowns I should go to the dentist every 6 months to make sure everything is good? I've never heard of this. Yes I should go get my teeth cleaned every 6 months to a year but that's my prerogative. I loved going here but I feel like I'm being ripped off and won't be going back.

    Photos
    Claremont Modern Dentistry
    Claremont Modern Dentistry - Claremont Modern Dentistry opened its doors to the Claremont community in November 2014.

    Claremont Modern Dentistry opened its doors to the Claremont community in November 2014.

    Claremont Modern Dentistry - Our paperless system delivers electronic charting, digital imaging and enhanced case presentation at chair side.

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    Our paperless system delivers electronic charting, digital imaging and enhanced case presentation at chair side.

    John Zhang, DDS - cosmeticdentists - Updated September 2026

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