Our Practice

When you visit our practice, we hope you will experience the fun, friendly atmosphere we work hard to create. We believe that our patients want to be involved in their dental care, so we provide information, answer any questions, and support your decisions about your treatment. Our experienced and friendly team goes out of their way to make every patient feel welcomed and relaxed during their visit.


Since 1993, Dr. Mark Letter has offered friendly, comfortable dental services to Kewaunee, Algoma and the surrounding areas. Dr. Letter first came to Kewaunee to purchase a practice from Dr. Grady. At that time two separate locations were consolidated into the present facility. For the next 20 years Dr. Letter continued to grow and improve the practice with current, state-of-the-art equipment, a highly skilled and trained dental team and a commitment to building lifelong relationships with his patients. By 2013 it had grown to a busy, thriving practice, making it the right time to invite Dr. Brian Sperber to join the practice. It was at this time that the practice’s new name LetterSperber Dentistry was announced to the community.


Our mission is to develop lifelong relationships with our patients by combining the latest dental technology with a professional and compassionate team. The result is beautiful, healthy smiles for a lifetime.

Each patient has different needs and desires when it comes to their dental treatment, and we promise to work with you individually to create a personalized treatment plan. We take pride in our team, their high level of service and expertise, and the wide array of dental services we provide. Your trust and confidence in us is not taken lightly; we work hard to deliver the optimal level of care for your family.

Education & Technology

We are committed to continuing education and learning. We attend dental lectures, meetings, and dental conventions to stay informed of new techniques, the latest products, and the newest equipment that a modern dental office can utilize to provide superior dental care.

Our office utilizes only the latest advancements in dental technology. With modern, state of the art equipment, we are able to best meet the dental care needs of our patients. The equipment we use includes digital x-rays, laser dentistry, and chair side monitors. That, combined with the skills and experience of our trusted team, ensures you will be receiving the highest quality in dental care from LetterSperber Dentistry.

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