Welcome to Onyx Dental Care

About Us

Located in the center of Darien, Onyx Dental Care, where you can avail trusted and authentic dental treatment at most reasonable rates. Our aim is to create and maintain an excellent and rewarding experience for our patients. Since our practice revolves around patient centric services and assurance, we are able to deliver a reliable array of services in the field of dentistry.

We offer professional services that suit each patient's needs. We strive to create a friendly environment for all our patients, and our primary objective has always been to help them solve their dental-related problems and live their everyday lives again. We constantly work to advance our techniques and services to achieve our goal of treating our patients quickly and effectively.

When you visit our clinic, our friendly receptionists will give you a warm reception and lead you inside to see our dental professionals. We understand that your comprehension of dental procedures and treatments may be why you rarely visit the dentist for check-ups. Rest assured that we hate subjecting our patients to any discomfort or pain. It is in our best interest to make every patient feel welcome; We want all our patients to be informed decision makers and fully understand any health issues you face. That's why we've developed a website loaded with valuable information about dental and dental problems and treatments. 

At Onyx Dental Care, we deliver accurate dental services, under the guidance of Dr. Madwar, who is the guiding light at this leading dental office. We believe that nothing but the best should be given to a patient who seeks aid with dental issues. This is why, our doctors have been selected after careful deliberation so that we can offer a focused and skilled talent in the field of dentistry to our patients. This is just one of the reasons why our service is quite popular and favoured in Darien, Illinois. Take a look at Dr. Madwar's profile, which will let you know more about him and his method of operation.

Please take a few moments to look through this site to get a better feel for Onyx Dental Care's capabilities and services. We also invite you to email or call our office at any time to request an appointment or ask any questions. Thank you.


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Meet The Doctor

Dr. Madwar is proud NYU Langone Hospital alumni where he completed his 2 years of Advanced of General Dentistry Residency.




  • "Dr. Madwar was referred to us by my orthodontist and he has been our family dentist ever since. He provides excellent care for both my wife and me, and is highly professional and patient. The staff at Onyx Dental Care are kind and warm, treating us like family. They take the time to explain everything, from treatments to insurance coverage and billing."
    Funny World
  • "I highly recommend Dr. Madwar. He handled my teeth issues quickly, efficiently. He explained everything from the whys to the what’s - even before I asked (or thought to ask)."
    Sara Mikuta
  • "Dr. MADWAR, DDS was exceptional. I went to him quite frightened because I cracked a crown. He was understanding, caring, and very patient besides being highly professional. He explained everything and made me feel comfortable with the procedure. I would highly recommend Dr. MADWAR for all of your dental needs. He also makes himself available to you if there is a problem or questions that you have. I’ve never liked going to dentist, I’ve always feared them but he has quelled my nerves and I feel thrilled that he’s my dentist now."
    Jean Mathis
  • "Dr. Madwar did a great job on my teeth. He is so kind. I haven't had a dentist that cares so much about my oral health. I can honestly say I enjoy going to the dentist instead of dreading it."
    Shelley Wiegmann
  • "My Son went here for his dental cleaning and exams. Everyone was very kind and patient and he really likes his dentist. Great experience and would recommend"
    Wayne Dabrowski
  • "Exelente trabajo"
    Alicia RUIZ
  • "The best dental work I received and a long time.very professional,Amazing great work, clean and affordable."
    marcel hudson
  • "The best dentist I've ever had! Dr. Madwar and the team took superb care of my teeth after having skipped on the dentist one too many times and having weird experiences in the past.
    Every step was clearly explained, he routinely checked to see if I was comfortable, and the appointment/pay process was seamless. Little to no wait time as well. No gimmicks, straightforward advice, and flexibility was all helpful too.
    Will be recommending the practice to others!"
    Umber W
  • "Dr. Madwar is very knowledgeable and professional. His attention to detail is commendable. He accepts no other result than perfect. Compassionate and caring, he and his staff go beyond the call of duty and genuinely care about their patients. I highly recommend Dr Madwar and his staff."
    Chavdar Momchev
  • "Amicable and professional dental experts providing quality service to the local neighborhood of Darien! Have been going to them for over a yr, and cannot express my gratitude and contentment enough for the tremendous customer service & stellar service they offer! Dr. Madwar & his team are truly setting up a tenacious benchmark for other dental clinics to match 👍"
    Hydez Qureshi
  • "Very patient staff and doctor. Precise and careful work. Professional while being at a reasonable price. Your teeth worth their service."
    Zhaodi Pan

Our Location

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Hours of Operation

General Hours


8:00 am-5:00 pm


10:00 am-7:00 pm




11:00 am-6:00 pm


8:00 am-4:00 pm


8:00 am-12:00 pm