1. Glenn A Mitoma DDS

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Ontario, CA

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Glenn A Mitoma DDS

4.7 (15 reviews)
Closed • Closed
Updated over 3 months ago

Services - Glenn A Mitoma DDS

Cavity treatment

Crown cleaning

Dental exams

Glenn A Mitoma DDS Photos

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Recommended Reviews - Glenn A Mitoma DDS

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8 months ago

Glenn is a very talented dentist. He truly cares about your smile. I wouldn't go to anyone else!

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1 year ago

Been my Dentist for many years but now I'm on Medicare HMO and he doesn't take it. But I go anyway for things most of the time.

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2 years ago

Love Dr. Mitoma. I was referred to him after my long time awesome dentist retired and he filled the missing dentist spot for me.

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3 years ago

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5 years ago

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8 years ago

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7 years ago

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10 years ago

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5 years ago

Glenn Mitoma is a caring and gentle dentist , I and my husband live the staff. Will never go anywhere else.

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6 years ago

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9 years ago

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12 years ago

Such a nice guy and a great dentist. I Highly recommend him!

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8 years ago

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7 years ago

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10 years ago

We've been seeing glen for years. He's gentle and has a positive attitude. Bottom line I don't want to go anywhere else.

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

Barsoum Dental Upland

4.8(703 reviews)
2.2 mi
Emergency services
Free consultations

First visit today to begin treatment. Amazing staff, kind and very attentive. The office runs like…read morea fine tuned machine, totally professional. It's a BIG office, I thought they wouldn't have the personal touch I was used to but I was put at ease immediately! Many thanks!!

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.

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Barsoum Dental Upland's front desk.

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Barsoum Dental team members at the Mountain Ave office grand opening

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Upland Modern Dentistry

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3.9(51 reviews)
2.7 mi

I needed a new local dentist looked on Yelp and found Upland Modern Dentistry and man I was so…read moreimpressed from the so helpful Brooke at front desk to all the the hygienists and techs and the dentist so friendly and professional and the equipment super modern tech. Really glad I chose them

I choose this dentist office because it took my insurance as well as my boyfriend. I do not believe…read morein reading reviews before making my own informed decision, I wish I did. The check in process was smooth however what happened after is what was disappointing. Dr.Morales was a terrible doctor and was very unkind. The hygienist was great so I decided to come back. I was happy to hear that Dr.Morales was no longer there. I refused to have x rays done again since we had billing issues before. They let me get seen but said next time I'd have to do them. The cleaning with the hygienist was good. I paid out of pocket for some services not covered but was disappointed that after the appointment I was charged more money. They're fraudulently charging insurance. I gave them the benefit of the doubt and called to get an explanation and was told I would get a call back. Still waiting for that call for over a month. Then today I get another bill. FRAUDS! Do not go to this dentist office. If they have any good reviews I am sure they were persuaded with something to do so.

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Upland Dental Group And Implant Center - Me ready in the chair for IV and extractions.

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3.5(184 reviews)
2.7 mi

Shout out to Sarah she did a amazing job with me deep cleaning fast and efficient. Ill definitely…read morebe be coming back till I have no more teeth

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.

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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

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Paul C. Chang

Paul C. Chang

3.0(19 reviews)
2.3 mi

Friendliness: 5/5 Front Desk: 5/5…read moreDoctors: 5/5 I had a good experience starting from the first phone call to the end of my treatment. When I first called them, the front desk lady Christine was very helpful and friendly; so I decided to give it a try. I was not disappointed, everyone in the office was just as nice and helpful. Dr. Kao spoke very patiently, took his time and explained his diagnosis and treatment. Office manager Lisa was also a down to earth and interesting person to chat with. Overall, they gave me a small and family-like feeling, which is rare for a dental office. (Especially coming from a massive place like Western)

I had a very disappointing and unprofessional experience at this office. My appointment was…read morescheduled for 1:30 PM, yet I waited over two hours with no updates. When I asked the front desk for an estimate, I was told "10 minutes," which turned into another 30 minutes on top of the long wait. When the dentist finally came in, he did not greet me, introduce himself, or explain anything. He came in grunting, immediately grabbed my bottom lip with force, and said "lots of tartar" -- which I already knew, that's why I scheduled the appointment. He then walked away to see another patient. Meanwhile, he spoke politely and attentively to the next patient, asking her about her concerns -- I was never asked how I was feeling, what my symptoms were, or anything about my pain. After this brief interaction, the dentist never returned. After nearly three hours in the office, I was told no treatment would be done that day. I was only given a prescription, and even that was communicated indirectly through the assistant while he was in the room. This experience felt dismissive, disrespectful, and completely unprofessional. Patients deserve basic courtesy, communication, and consent -- none of which I received here.

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I wish there was a superstar rating so I could more accurately express just how amazing Dr Rivera…read moreand her entire staff are - 5 stars is barely enough to scratch the surface. Let me put this review into context a bit - I have been to 6 different dentists and Mountain View Dental is my 7th and not all of those were horrible. In fact some were great. But not one was absolutely exceptional the way this office is. I have extremely sensitive teeth and gum recession which causes pain even when I am brushing my teeth or breathing in cold air, causing the need for a lot more patience and precision for the folks at a dental office working on my teeth. Most dentists are more concerned about patient throughput than actually taking care to not cause unnecessary pain with the extra time it takes. But not here - Dr Rivera and her staff are so gentle and comforting I almost feel like I am going to a spa. I have never felt more well cared for then at this office. They provide soft, cozy blankets, tell light hearted stories to keep my mind off the procedure, and put on good TV shows even though I am too nervous (read - uncontrollably crying from anxiety and nerves) to open my eyes to watch them. They don't shame me for this as other dentists have done - they just make it as quick and easy as possible to take good care of my teeth. If you are looking for a new dentist, a second opinion, or simply want to experience the way going to the dentist should be, I cant recommend this office enough.

Great staff great dr with great work ethics and always very efficient is working on patient.read more

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Glenn A Mitoma DDS - generaldentistry - Updated October 2026

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