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About Us
At Pinnacle Dental Group, our mission is simple: to provide every patient with the highest level of dental care in a supportive, honest, and comfortable environment. With locations in Plainfield, Clarendon Hills, and New Lenox, we are proud to serve individuals and families across our communities with professionalism and heart.
We are passionate about dentistry — not just as a science, but as a way to change lives, build confidence, and support lifelong wellness. Every member of our team is committed to staying at the forefront of dental care through advanced training, continued education, and modern techniques. Our professionals maintain the highest levels of accreditation and constantly expand their knowledge to provide the most current and effective treatments available.
Meet Our Dentists
Meet the People Who Make Pinnacle Exceptional.
Dr. Justina Mockunas, DDS – Plainfield Dentist
Dr. Justina Mockunas graduated in Lithuania from Kaunas University of Medicine, College of Dentistry where she obtained her DDS Degree in 2008. In 2017 she got accepted into Advanced Standing Program at NYU Langone Health and obtained Certificate for her 2 year Advanced Education In General Dentistry residency in 2019. Soon after this Dr. Mockunas moved to Chicagoland area and received her accreditation by CODA and obtained an IL dental license.
During her years of practice Dr. Justina has learned that making others smile from inside out is what drives her into becoming a better dentist everyday. She feels rewarded with being able to improve a patient’s self esteem and confidence by creating a healthy beautiful smile. Dr. Justina’s knowledge, gentle chair side manner and positive personality decreases her patient's dental anxiety. She enjoys educating her patients about oral health. Dr. Justina constantly is seeking excellence in dentistry by continuing education to better serve her patients.
Dr. Sabrina Ramahi, DDS – Plainfield Dentist
Dr. Sabrina Ramahi is a dedicated general dentist committed to providing comprehensive, personalized, high-quality dental care. She earned her Doctor of Dental Medicine degree from Midwestern University College of Dental Medicine in Downers Grove, where she honed her clinical skills with a strong focus on patient-centered treatment. Prior to dental school, Dr. Ramahi completed her undergraduate education at the University of Illinois at Chicago with a Bachelor of Science in Neuroscience, which has given her a strong understanding of how oral health connects to overall well-being.
Dr. Ramahi is passionate about both cosmetic and general dentistry, and enjoys helping patients achieve healthy, beautiful smiles while meeting their individual needs. She is an active member of the American Dental Association, Illinois State Dental Society, and the Chicago Dental Society, which allows her to stay current with the latest advancements and best practices in modern dentistry.
Known for her gentle approach and commitment to creating a comfortable environment, she strives to build lasting relationships with her patients, emphasizing education, prevention, and long-term oral health.
Outside of the office, Dr. Ramahi enjoys staying active, traveling, cooking, and spending time with her family and friends.
Dr. Irum Tariq, DDS – New Lenox Dentist
Dr. Tariq grew up in the Northshore suburbs of Chicago and has always had a passion for helping others. She earned her undergraduate degree in International Studies from Loyola University Chicago before pursuing her Doctorate of Dental Surgery at Indiana University School of Dentistry.
Dr. Tariq provides a wide range of dental services, including dental implants, root canals, dental crowns, and teeth straightening, all tailored to help patients achieve lasting oral health and confident smiles. Her “flossophy” is simple: deliver high-quality care in a warm, relaxed setting—with a healthy dose of her signature (and admittedly terrible) dad jokes.
Outside the office, Dr. Tariq enjoys traveling, reading, photography, hiking, and spending time with friends and family. She's also a proud plant mama to her beloved cactus, Plaque.
Dr. Eva Coggin, DDS – Clarendon Hills Dentist
Dr. Eva Coggin brings over 25 years of experience in general dentistry and a deep passion for patient care to the Pinnacle Dental Group family. Raised in Syracuse, New York, she earned her Bachelor of Science degree from LeMoyne College in 1996 and went on to receive her Doctorate of Dental Surgery from the State University of New York–Buffalo College of Dentistry in 2000.
Following dental school, Dr. Coggin completed a comprehensive one-year residency at Kaleida Health, where she trained at both Millard Fillmore and Buffalo General Hospitals. In 2003, she relocated to the Chicago area, where she has continued to serve patients of all ages with skill, compassion, and dedication.
Dr. Coggin enjoys all aspects of general dentistry and has a special love for working with young children, helping them feel comfortable and confident during their dental visits. Her gentle and approachable demeanor makes her a favorite among patients and families alike.
Outside of the office, Dr. Coggin enjoys gardening, traveling, spending quality time with her family, and cheering on her son at his college hockey games.
Dr. Coggin is excited to be a part of the Pinnacle Dental Group family and looks forward to continuing her tradition of providing high-quality, patient-centered dental care.
Our Locations
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