My Dentist
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My Dentist
At My Dentist, every dental visit is about you. Your excellent oral health, treatment preferences, and overall comfort are our top priorities, and we combine years of experience with advanced technology to ensure you receive the optimal care you deserve. To schedule a consultation with one of our experts, call the My Dentist office in Londonderry, NH, today at (603) 965-3407.

The love a provider has for its profession is expressed to the patients through the care, diligence during the visits, and utmost respect for their concerns. Also, having on staff the best personnel makes the experience even better. From the reception and secretarial services, to their highly skilled technicians and hygienists.
Services
Our comfortable, spa-like dental office is designed with one thing in mind-maximizing the patient experience from the moment you walk into our office until the moment you leave. Our highly experienced doctors and staff have a gift for helping you feel relaxed and comfortable. We also stay up-to-date on the latest technology and dental treatments to ensure an optimal experience, regardless of your dental needs.
Dental health care means something different to everyone, and throughout the course of your life, your own unique needs may change, as well. For instance, you will always need routine preventive care, such as regularly scheduled checkups and cleanings, no matter how old you are. But on occasion, you might also require a cosmetic touchup to revitalize your smile's appearance, or a restorative treatment to repair a damaged or infected tooth.
Dr. YiChen (Jenn) Wei obtained her Bachelor's degree in Biology from the University of California, Riverside, and her Dental degree from Tufts University School of Dental Medicine. She also completed a general practice residency at Stony Brook University Hospital in Long Island, New York.

After four years in private practice working as a general dentist, Dr. Wei realized her passion for saving teeth and returned to Tufts University for her specialty degree in endodontics.In addition to private practice, she is a clinical instructor teaching both undergraduate dental students and postgraduate endodontic residents at Tufts.
Londonderry's 2017 Old Home Day celebrations have just come to an end. As part of the Londonderry community, My Dentist was excited to be involved in this yearly event. Our staff was on hand to give out special goody bags to participants, with an assortment of tote bags, balloons, toys, and other fun items offered.
The reason why regularly scheduled exams and cleanings are so important is because prevention is the most important aspect of dental health care. During your examinations, your dentist might also utilize digital imaging equipment, such as X-rays and intraoral cameras, to produce a clearer picture of your oral health.
Reviews (22)
Rebecca Ouellette
Rebecca Ouellette
Sep 07, 2021
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I used to love this place and my family went here for years. The staff has changed quite a bit and it is now a very different place.
Recently, I was told by one of their hygienists that she was not vaccinated. This concerned me, but it was before Delta and before I was diagnosed with Cancer, so I let it be.
When my next appointment was near, I called the office and said that I needed a vaccinated person to do my cleaning as ot was not safe for me. They acted as if I was being unreasonable and difficult. I said common sense would indicate that medical personal should at the very least respect
Rose Ellis
Rose Ellis
Mar 28, 2021
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I’m new to the area and read positive comments about this dental practice online and booked an appt. I wasn’t disappointed. Beginning with the front office (Hannah), this is a professional and competent practice. Melissa, the hygienist was very through and Dr. Lei was attentive and engaging. The dentists have excellent credentials. I highly recommend them.
Kikil A.
Kikil A.
Nov 20, 2020
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I had an appointment for filling and cleaning. they did X rays and cleaning but she said i need to have an appointment again for deep cleaning. why can't the do deep cleaning now instead of doing it next year. cleaning wasn't that good though and i had an appointment for filling but he didn't do it. so unprofessional. that was doctor Mehdi. everytime i eat my tooth feels so sensitive because he didn't do the filling.. i Don't wanna go back there anymore. and the last time i went there the filling sucks. it wasn't good enough. so sad. i am not happy with the outcome
Mia Bonsell
Mia Bonsell
Aug 05, 2020
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I was absolutely terrified to go to the dentist, bad childhood experiences and all that, I had been avoiding the dentist for 6ish years, but finally decided to go and choose My Dentist. Every single person I met there was personable, friendly, and provided me with the reassurance that I needed. I had some fillings and they took amazing care of me, I didn't feel pain for a single second. And now I cant wait to go back!! (I NEVER thought I’d say that in my entire life.) Everyone and I mean everyone here knows exactly what they’re doing, and if you're nervous about going, choose My Dentist!
Witha Lakeview
Witha Lakeview
Aug 03, 2020
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This place is absolutely amazing. VERY gentle, not over priced. Friendly, and funny, honest!!!!!!! Worth the drive from where ever you are. Please consider coming here!!! Well worth it.
Liz B.
Liz B.
Jun 24, 2019
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If you have to go to the dentist this is the place to be. I mean no one enjoys going to the dentist but there isn't a place I would rather go to. Thank goodness the staff here makes you feel comfortable and they remember you even if you have only been there for cleanings. My Dentist is that simple, you should call it yours too.
J. Go
J. Go
Dec 20, 2018
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Dr Cullen is phenomenal. She is knowledgeable, capable, and has always done right by me. I trust her opinion, advice, and her dental skills. She understands my financial situation and prioritizes the work.
This visit was for a filling. She’s done multiple crowns and fillings for me. I haven’t had any issues with them.
Her new assistant, Stephanie was wonderful also.
I would rate Dr Cullen 6 stars if I could.
Nova Sylvia Carmichael
Nova Sylvia Carmichael
Nov 20, 2018
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I started coming here 5 years ago after researching good dental offices in the area. I was very impressed with the expertise and skill. I’ve always felt comfortable coming to this office despite having moderate anxiety around dental procedures. Dr. Mehdi and Nicole were absolutely wonderful. I highly recommend this office and their new location is very welcoming and even has a play area for kids.
Jim F.
Jim F.
Nov 20, 2018
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I came here in April 2018 to have two fillings done after they discovered two small cavities during my 6 month cleaning. One of those fillings were incorrectly shaped, I returned and the owner worked on it. Again, the cavity wasn't done properly. I had no pain issues with this tooth before they said that there was a cavity and there wasn't a cavity 6 months prior..

I was still having pain when I chewed on that side. I informed Kim, their office manager, and she said that I should just come back in to have it worked on again. Well, after having the owners wife first try and then the
Ivelisse D'Onofrio
Ivelisse D'Onofrio
Nov 16, 2018
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The love a provider has for its profession is expressed to the patients through the care, diligence during the visits, and utmost respect for their concerns. Also, having on staff the best personnel makes the experience even better. From the reception and secretarial services, to their highly skilled technicians and hygienists. SUPERB CARE is what I receive from My Dentist every time. My family has been under the care of this place of excellence for a few years, and are truly grateful. I HIGHLY recommend their services.
Michael Welch
Michael Welch
Sep 17, 2018
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First time for crowns for me and the tech that helped, Nicole(?), was great! I am pretty sure it was Nicole, could have been something different...?....anyways she explained everything and was very knowledgeable about the process! It was Nicole, definitely Nicole! I’d recommend anyone looking for a dentist to give them a shot. Dr. Method was excellent as well, quick, clean, and informative to my many questions. They also just moved and the new office is excellent. Highly recommend and request Nicole, she’s good. Nicole.
Dorothy W.
Dorothy W.
Sep 04, 2018
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As a Critical Care RN, I appreciate this practice beyond measure. I see some reviews from previous years & just have to say they are so outdated. I've gone to Dr Mehdi Karimipour & his ancillary staff for several years now & every experience since summer 2016 has been of the highest caliber. From the moment you walk into the reception area to the chair & beyond, there is professionalism & friendliness. Dr Mehdi is a genuinely caring Doctor & his staff are exemplary. Sometimes folks only post to complain. I wonder how many have had the same great experiences as myself
Caroline M.
Caroline M.
May 23, 2017
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Great dentist office!! Especially love the Kim's at the front desk and the hygienist Melissa!!! Also Dr. Mehdi is fantastic! Looking forward to my next visit!
Joel L.
Joel L.
May 15, 2017
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Cleanings are always a pleasure here with Melissa. Does a great job and is conscious of any flinching for pain management. I always enjoy my visit, the other nice thing is they quote prices so your not shell shocked...
Holly D.
Holly D.
Dec 10, 2016
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We got scammed. Had a temp worker that spent most of her time out of the room yet I managed to get billed for services that never happened. Never see a dentist that would use temps to begin with.
Lynne B.
Lynne B.
Apr 09, 2016
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Wonderful office! Dr. Medhi is a perfectionist when it comes to your teeth. He conscientiously takes the time to both explain what he is doing and do the job right. He is outstanding in every way - his dental expertise, personal care, patience and personality. I used to see him in Concord, MA, and now drive 50 minutes to his office - well worth the time traveling!

The front office is welcoming and efficient. I have had both Melissa and Karen as dental assistants, and they both do great work and make going to the dentist more of a pleasure than a pain. I highly recommend this office.
Kathy S.
Kathy S.
Feb 29, 2016
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Dr. Krefting is wonderful - she really listens to my concerns, she's gentle, and she make sure that my visits are pain-free. I travel almost an hour to see her - she's that good! And my teeth are in the best shape they've ever been, because she's fixed everything, including some inferior dental work that I'd had done before I found her.
Evaluation U.
Evaluation U.
Oct 06, 2015
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I used to really enjoy coming here. I have been visiting this office for around 7 years now, but I think I am going to switch offices.

I used to really enjoy Dr. Krefting's demeanor and personality. I also found she employed similar help for the office and hygienists. The woman who worked the front desk was always super nice, and the whole place was very understanding and accommodating.

Not anymore. I've had attitude from the front desk for trying to ask questions, pay bills, set or even cancel appointments. I don't even get to SEE Dr. Krefting anymore when it comes to my appointments
Jami V.
Jami V.
Aug 06, 2015
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First let me tell you about me, for years,too many to mention, I loathed going to the dentist. The picking, the poking, the needles. I would dread those days when my appt came up on the calendar. Then we moved to Londonderry. Well I had to go through the arduous task of finding a new dentist, not only for me and my husband, but one who sees children. In doing my research I came across " my dentist" I then went to their website and was immediately drawn to them by dr. Jan Krefting, she had such a caring look and as I continued to read her approach to dentistry, I thought I am going
A. C.
A. C.
Dec 23, 2014
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I had a lot of problems with the office manager and the Dr. Their personalities, pleasantries and actions just seemed fake. I felt I was not important to them, but my money was. Both ladies were very misleading and un- trustworthy. Two of the most important things in my opinion when you are dealing with healthcare. I found the Dr's work sloppy, such as dropping her tools on my chest while she worked on my mouth. She also doesn't explain what she is doing and paints a rosy picture to make you feel calm. But then she recommends treatment and doesn't tell you why. For example
M. D.
M. D.
Oct 08, 2014
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Went for a filling yesterday and made the dentist aware that I am pregnant before beginning anything. The novacaine was so strong that my entire left side of my face was numb, couldn't even close my eye. After the filling she offered to reverse the numbing with an anesthetic called "ovaverse". I had never heard of it but had full confidence that what she was administering was considered safe. Well, just so happens I looked up more information about ovaverse and called my doctor and it SHOULD NOT be given to pregnant women unless the benefits out weigh the risk. It's considered
Courtney C.
Courtney C.
Jan 03, 2013
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Instead of looking at my teeth, the first thing this dentist did was take an X-Ray. Then, she merely looked at the X-Ray and told me, "Wow! You have amazing teeth. And you've never had a cavity!"

Well...I have. I've had many. I've got fillings to prove it! Perhaps if she looked IN my mouth instead of at a screen, it would have been a different story? Or maybe it's just that my other dentist did such a great job of hiding my fillings that they are impossible to detect, even by another dentist. Needless to say, I haven't been back (and went back to my other dentist