Learn More about Our Practice

I’m Dr. Collins and I’d like to personally invite you to explore what makes our practice unique and special.

About Us

If you’ve ever put off dental work because you dread the experience, it’s time you discovered the difference at Collins Dental. Our relaxing office is designed to lower your stress. Our compassionate, highly skilled staff use the latest tools and techniques to keep you as comfortable as possible during and after your procedure. Every treatment room is equipped with nitrous oxide and local anesthesia for your comfort. We use the latest equipment, including intraoral and extraoral cameras, digital X-rays, and digital radiography. This digital technology is not only faster than traditional X-rays, it exposes you to 80 percent less radiation.

Meet the local doctors

Dr. Dennis J. Collins, DDS

Born and raised in DeKalb, Dr. Collins is dedicated to the community, serving on a number of local boards and commissions. On the weekend, you might run into him on a local golf course, running, or riding his bike on the area bike paths.

Dr. Collins cares deeply about bringing best-in-class dental services to his community. When Collins Dental opened its current facility in 2008, his goal was to create a building as high-quality as the work performed there.

Dr. Collins’ patient-centered philosophy puts a high value on empowering patients to make their own decisions.

“I believe in giving our patients choices,” he says. “Let them know what options are available and inform them so they can make decisions about their own healthcare.”

Dentistry is a rapidly evolving field, and Dr. Collins sets an example for all the dentists in the practice, all of whom are committed to staying current on the latest trends in treatment.

Meet the local doctors

Dr. Mark A. Sloan, DDS

Dr. Sloan is a firm believer in patient-first dentistry, a philosophy that led him to join Collins Dental Group.

“It is very reassuring to be associated with a group of dental professionals who really care about their patients,” he says. “Putting the patient first and working together as a team is what dentistry is all about.”

Dr. Sloan’s professional interests include advanced aesthetics, implant restoration, and root canal therapy. He is committed to continuing education and staying on top of the latest advancements in dentistry.

Dr. Sloan is a proud NIU Huskie. He loves spending time outdoors whether he is hitting the slopes on skis or on a motocross bike. He also enjoys competitive paintball and jamming out on his guitar in a local band.

Meet the local doctors

Dr. Allison Sullivan, DMD

Dr. Sullivan uses her background in food science and nutrition to bring an integrated approach to her patients’ oral health. She believes a comprehensive treatment plan is key to maintaining a healthy mouth.

Dr. Sullivan nurtures patient relationships built on trust and respect. She keeps informed of the latest advancements in dentistry so she can provide her patients the most up-to-date treatment options.

“I love dentistry because it allows me not only to help people with their dental needs, but to form lasting relationships with so many different people in my community,” she says. “I look forward to making you and your family feel comfortable and confident in your dental experience.”

When she’s not in the office, Dr. Sullivan is on the go with her husband and three children. She enjoys hiking, traveling, exercising, and gymnastics.

Meet the local doctors

Dr. Tom Hensley, DDS

Born in DeKalb and raised in Sycamore, Dr. Hensley feels privileged to bring top-notch dental care to his hometown.

Dr. Hensley believes quality care comes from putting the patient first. He builds a personal connection with his patients to better understand their needs. He respects his patients’ independence, educating them about all their options and empowering them to make the best decisions for their own care.

This leads to great outcomes and a stress-free patient experience.

“I was trained with the perspective that patients always come first,” he says. “Whether it’s something simple or complex, I always want my patients to feel comfortable.”

Meet the local doctors

Dr. Cornell McCollum III, DDS, MD

As Collins Dental Group’s resident oral surgeon, Dr. McCollum offers patients an advantage few others in the area can match–the convenience of being seen in the comfort of their dentist’s office.

Dr. McCollum is a caring surgeon who coaches youth soccer in his free time. He also enjoys reading and martial arts.

He is experienced in all phases of implant dentistry including immediate implant placement after extractions, bone grafts, sinus lifts, and All On Four implant dentistry.

Dr. McCollum also enjoys providing facial improvements with Botox and dermal fillers to keep our patients looking their best.

Video Testimonials.

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