Colby Dental

2704 45th St.
Highland, IN 46322

Phone: 219-924-2736


Colby Dental Gives Back

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Dr. Timothy Colby, D.D.S.
Indiana University School
of Dentistry



Kelly McDermott, R.D.H.

Kelly has a strong background in the field of Dentistry. Not only is she a licensed Dental Hygienist, she is also a licensed Expanded Functions Dental Assistant. Kelly’s career is dentistry started in 2010 after graduating from Everest College with a diploma in Dental Assisting. She began her career at Colby Dental in 2011 working directly with Dr. Colby providing top-notch patient care.

Kelly’s passion towards dentistry and helping others led her to expand her knowledge towards the field of preventive care. Kelly graduated with a Bachelors of Science in Dental Hygiene from Indiana University Northwest in 2017. She is a licensed in Indiana and currently working towards obtaining her Illinois license, as well as, a local anesthesia license. Kelly is a member of the American Dental Hygiene Association (ADHA), IDHA (Indiana Dental Hygiene Association) and meets with colleagues once a month for study club.

As a patient, you can rest assured Kelly will take care of you. She is approachable, kind, gentle and a great patient advocate. With her strong knowledge in both restorative and preventive dentistry, she can explain all procedures, answer your questions and help guide you towards optimal oral health.

When Kelly is not providing five-star patient care, she enjoys attending concerts, hitting the gym, playing video games and spending time with family and friends. Kelly and her husband Nick are proud parents of a rescued orange tabby cat, Cheezit.

Michelle Coin, R.D.H.


Michelle spent her childhood in Griffith, graduating from Griffith High school in 2001. She attended Indiana University Northwest for Dental Hygiene and graduated in 2005. She is currently licensed in Illinois and Indiana. Michelle also has her dental anesthetic license.

Michelle’s philosophy is ‘maintaining a healthy mouth for a healthy body’. She loves educating patients on overall oral health and instructing patients on what tools to use to achieve the best smile. She enjoys building relationships with patients and wants them to feel relaxed and comfortable in the office.

In her free time, Michelle loves spending time with her husband Jason and their twins Austin and Allie. She enjoys camping, soccer, gardening and spending time with family.

Gretchen Tomich, R.D.H.


Gretchen's patient philosophy: "I want to help people realize that having a beautiful smile starts with having a healthy mouth.  Good home care is important, and is actually very easy to do.
When you come in for your dental cleanings, you can be sure that Gretchen will take excellent care of you.  Whether you have dental anxiety, gag reflex tendencies, advanced periodontal disease, or any other special needs, she will listen to your concerns and help you with your visit.  If it's been a long time since your last check-up, no problem.  She can help you get back on track to optimum oral health.  Education is a key element to our patients success in the dental chair.  Gretchen says, "sometimes it's just a matter of changing that one small detail in a patients routine, and all of a sudden they come back to their next visit like a new person.  Being able to restore a patients confidence in their smile is such a rewarding experience, I love what I do!"
Gretchen is a graduate of Indiana University Northwest, and began working at Colby Dental in 2006.  She is a licensed Dental Hygienist in both Indiana & Illinois.  She has certification in Local Anesthesia, and is highly experienced in treating periodontal disease.
Gretchen is married to her college sweetheart, and together they have 2 beautiful daughters.  When she is not at work she enjoys spending time with her family, running, photography, cooking & gardening.  She is also a member of Bethel Church.  For the past 7 years, Gretchen has been volunteering at local elementary schools.  She gives presentations to students during dental education month.  She believes that starting early with education about good home care and nutrition is the key to helping future generations overcome tooth decay and periodontal disease.