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    John P Greenwood, DDS

    5.0 (10 reviews)

    Services - John P Greenwood, DDS

    Cavity treatment

    Dental exams

    Tooth filling replacement or repair

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    Ask the Community - John P Greenwood, DDS

    Review Highlights - John P Greenwood, DDS

    Greenwood and his staff were efficient, helpful, friendly, and professional in helping me fix a prominent tooth in a timely fashion.

    Mentioned in 7 reviews

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    Barsoum Dental Upland

    Barsoum Dental Upland

    4.8
    (698 reviews)
    0.8 mi
    Emergency services
    Free consultations

    I've been a long time patient of Dr Barsoum, and I can honestly say the experience has been…read moreconsistently top-tier. From routine cleanings to more detailed procedures, he's always thorough, patient, and genuinely invested in your long term dental health. What really sets the Upland office for success is the team. I am sure the same standard carries through the entire practice locations. From the front desk always welcoming and efficient (no chaotic waiting room energy) everything runs like a well-orchestrated operation. Dr Barsoum takes the time to explain options clearly, never rushes decisions, and makes you feel comfortable, even if you're not exactly excited about being in a dental chair. The office is clean, modern, and runs on schedule (which I deeply respect). If you are looking for a dentist who combines skill, professionalism and genuinely caring team, this is the place. After years as a patient, I wouldn't trust my sole anywhere else!

    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's front desk.
    Barsoum Dental Upland's front desk.
    Barsoum Dental team members at the Mountain Ave office grand opening
    Barsoum Dental team members at the Mountain Ave office grand opening
    Exterior of office with Grand Opening balloons

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    Exterior of office with Grand Opening balloons
    Alta Dental Care

    Alta Dental Care

    4.8
    (384 reviews)
    0.9 mi
    Free consultations
    Emergency services

    I had an excellent experience at Alta Dental and can't recommend them enough. From the moment I…read morewalked in, the staff was warm, welcoming, and incredibly professional. They made scheduling easy and were even able to accommodate me on short notice, which I really appreciated. The team is extremely knowledgeable and took the time to thoroughly explain everything, making sure I felt comfortable and informed every step of the way. You can tell they genuinely care about their patients and go above and beyond to provide top-notch care. The office is clean, modern, and runs efficiently, which makes the entire experience smooth and stress-free. If you're looking for a dental office with outstanding customer service and a team that truly prioritizes patient care, Alta Dental is the place to go.

    Stressful & annoying experience just trying to schedule a free consultation. I was asked to provide…read moreX-rays from my previous dentist, which I did, but then received multiple follow-up calls asking for access to the X-rays, treatment recommendations, pricing, and paperwork from other dental offices. What frustrated me most was being repeatedly questioned even after I explained I didn't have the information. For a consultation, it felt excessive and made the experience stressful before I had even stepped into their office. I ended up going to Barsoum dental office in Chino where the consultation was quick, easy, and they even took complimentary X-rays. The difference in the new patient experience was night and day.

    Photos
    Alta Dental Care
    Waiting room
    Waiting room
    Treatment room

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    Treatment room
    Upland Dental Group And Implant Center

    Upland Dental Group And Implant Center

    3.5
    (183 reviews)
    1.0 mi

    I just love going to the that dental Office. The staff is…read morevery friendly and the dental assistant to the dentist are very kind and gentle. I always ask for the dentist Johnny I never had any problem going there. I highly recommend them if I can give them a 10 I would do that.

    WARNING! FRAUD! Do not go here for a root canal unless you want to lose a tooth. Because of…read moretheir neglect my daughter had multiple infections and they would tell her to take ibuprofen instead of giving her a timely appointment. Rose in the office also was VERY neglient on calling for her crown. It should have been weeks from the time she got her root canal to the time she got her crown. NOPE. After months of pain, calling the dentist they finally made an appt and the Endodontist said her tooth was UNSAVABLE and she had to get it taken out!!!!! So she lost her permanent tooth and of course they wanted her to get an implant. Her other root canal never got a crown either. After months of waiting for it , on the day she was suppose to get her crown Upland Dental cancelled her appointment and said they could no longer see her!!! These people are the most unprofessional people/business I have ever seen. They wanted to do thousands of dollars of unnecessary stuff of which I said "No we will just get necessary things done first. Wow, FRAUD ALERT.

    Photos
    Upland Dental Group And Implant Center
    Here is a xray of my mouth & area they removed the tooth from. Apparently, area has an infection and it has been 4 weeks since the extractio
    Here is a xray of my mouth & area they removed the tooth from. Apparently, area has an infection and it has been 4 weeks since the extractio
    This is the paper they showed me that they claimed was emailed to them from my insurance. Even if that is so the dentist is  Dentical.

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    This is the paper they showed me that they claimed was emailed to them from my insurance. Even if that is so the dentist is Dentical.

    John P Greenwood, DDS - generaldentistry - Updated August 2026

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