911 N. ELM, SUITE 230, HINSDALE, IL 60521

Hinsdale Dentists


Peter T. Harnois, DDS

dr-peter-harnois-hinsdale-dentistDr. Harnois graduated from University of Illinois College of Dentistry with Honors in 1982. He was Class President for 3 years and received numerous awards for educational and clinical excellence. Dr. Harnois has been practicing Dentistry in Hinsdale for over 30 years.

His philosophy is to provide the most gentle and minimally invasive cosmetic and metal-free dental treatments with natural results.

Having grown up in Hinsdale my patients feel like family to me. We bring our A game every day and from the moment you enter our office until you leave we focus our full attention on you as an individual so you get the best customized care that fits your needs, wants and desires. Our patients appreciate our commitment to listen first to their concerns.”
Dr. Harnois lectures internationally to properly educate his fellow dentists around the country on emerging technologies in dentistry that he utilizes in his own practice. He is the President of the Illinois American Academy of Facial Esthetics and trains dentists on Botox and dermal filler techniques.

Dental Tips from Dr. Harnois: Most of my patients come in with fear and anxiety about their upcoming dental appointment. We use the NuCalm system to naturally relaxed them and eliminate their fears.

Worn, chipped, gapped, crooked, stained teeth are some of the most common patients concerns. Minimally invasive porcelain veneers that do not involve shots, temporaries or removal of painful tooth structure are a great choice to treat these conditions and achieve a permanent straight, stain-free smile.

For TMJ muscle pain, headaches, gummy smile, and wrinkles in skin we use therapeutic and cosmetic Botox and dermal fillers. We offer a full range of biocompatible, metal-free dentistry to remove and restore old metal fillings and crowns.

Zivile Z. Chirban, DDS


Dr. Chirban graduated from the University of Illinois Dental College in 1982 and is constantly upgrading her expertise every year by attending seminars. This is her 30th year of practicing Dentistry.

“I enjoy all aspects of being a general dentist including treating patients of all ages, from 3 to 100. Restoring someone’s smile is my favorite procedure. It can be as simple as tooth whitening and bonding to more involved procedures requiring Invisalign treatment followed by crown and veneer placement. Patients really appreciate that we can help give them the confidence to smile again.”

Dental Tips from Dr. Chirban: I see patients for issues regarding decay, fractured teeth, pain, discolored teeth, poorly positioned teeth and dental phobia. Decay is as simple as preparing the tooth without painful shots using Biolase and restoring with a tooth colored filling. A fractured tooth may need a crown or if it is more involved, an implant. Thanks to Invisalign I can reposition poorly aligned teeth to a more esthetic arrangement. Discolored teeth may only need an in-office teeth whitening or the patient may want veneers to give them the brightest smile possible.

“I love being a dentist. After 30 years of practice I am excited about all of the technological advances that allow me to treat my patients in a state of the art office utilizing the best materials available.”

Michael J. Kowalczyk, DDS


Dr. Kowalczyk graduated from Virginia Commonwealth University (VCU) School of Dentistry where he served as Class President for 2 years, and was the recipient of the American College of Dentists Outstanding Student Leader Award. Following graduation, he obtained additional training at the University of Florida, where he was awarded a certificate for Advanced Education in General Dentistry and earned fellowship from the International Congress of Oral Implantologists (ICOI).

Dr. Kowalczyk grew up in River Forest, IL, and was a 3-sport varsity athlete at Oak Park and River Forest High School. In college, he was recognized as an Academic All American by the Men’s Collegiate Lacrosse Association.

His philosophy is that people do not care how much you know until they know how much you care.

“I look forward to serving every patient beyond what he or she would expect and to developing lasting relationships built on trust and great patient care. My hope is to help every patient make the right decisions while addressing their needs.”

Dental Tips from Dr. Kowalczyk: It is important that all patients receive a complete exam to check your joints, muscles and teeth to ensure they are in harmony. Signs will precede symptoms, so I recommend regular visits in order to have the opportunity to diagnose and treat problems before they exacerbate. One common example I notice is tooth wear due to clenching or grinding (known as bruxism). Many people have this habit while they sleep, which may lead to tooth trauma and sore muscles if left untreated.