No practice runs well without great staff, and we have the best! Take a moment to get to know our team - their unique talents and skills combine to ensure that you receive superior service and an unsurpassed level of caring during each and every visit to our office. Together, the staff of Portnoy and Tu Family Dentistry guarantee that every aspect of your dental care exceeds your expectations.

Melissa Mortinsen

Melissa Mortinsen

Office Manager

“I have worked in the dental field since 2007 as an office coordinator, dental assistant, and now as an office manager. I love working in the dental field because it is nice to see patients go from rarely smiling to smiling all the time. It feels great to know what a difference we can make in someone’s smile and life.

I have been married since 2001. I am a mother of three boys. I enjoy watching my kids and husband participate in sports. When they are not playing sports, I enjoy spending time outside and entertaining with friends and family.”

Angelina Bandurski, RDH

Angelina Bandurski, RDH

Registered Dental Hygienist

“I graduated from Ferris State University with a degree in Dental Hygiene. I began working in the dental field when I was sixteen as a co-op student. This opportunity led me to desire to become a dental hygienist. Through my experience and ability to be mentored, I have grown greatly in my career and expect to always continue to grow. My goal is to help give patients the ability to keep their smile healthy for a lifetime.

My husband, Steve, and I live in Howell with our children and our dog, Chachi. We enjoy running, traveling and spending time with our families.

I have been working for Dr. Portnoy and Dr. Tu since 2012.”

Catherine Rivera, RDH

Catherine Rivera, RDH

Registered Dental Hygienist

“Hello, my name is Catherine. I am a Registered Dental Hygienist (RDH) and I received my Associate of Science Degree in Dental Hygiene from Lansing Community College. I have over 11 years of dental experience as a dental assistant, insurance biller, and receptionist. As your dental hygienist, it is my top priority to make you feel welcome and comfortable. I also believe in giving you the best information so you are better equipped to maintain your oral health at home.

I live in Holt with my husband, children and 2 dogs. My family is everything to me! I love to spend all of my free time with my family and friends.”

Stefanie Robinson

Stefanie Robinson

Dental Assistant

“I graduated from Mott Community College in 2003 after earning an Associate Degree in Applied Science for over ten years. I have gained valuable experience assisting dentist and patients of many different backgrounds and cultures. I love comforting, helping and playing an important role in making sure our patients have the best dental experiences possible.

My children Gordon & Michael, my grandchildren and I live in Flint. I began working for Drs. Portnoy and Tu in the fall of 2014 and I love it. In our spare time, we enjoy spending time with our family, painting, working out, watching sports and fishing in the Summer.”

Mali Vue

Mali Vue

Dental Assistant

“I graduated from Ross Medical School in 2010 to become a dental assistant. My dental career goal is to advance my continuing education toward being certified as a CDA (Certified Dental Assistant) and RDA (Registered Dental Assistant). I love working with children and adults in helping them to understand how important it is to maintain a good oral health. I love all aspects of dentistry! It is rewarding to see that I'm part of a team to help and maintain patients' optimum oral health.

I live in Lansing with my wonderful little family—my husband, a son, and a daughter. We love spending time together—fishing, shopping and visiting my parents in Warren.”

Francis (Fran) Ford

Francis (Fran) Ford

Dental Assistant

“My name is Fran. I have worked in the dental field for over 25 years. After graduating from Central Michigan University with a Bachelor of Science in Geology. I never imagined this would become my life's passion. I started out billing insurance and worked my way up to running the front office of two small dental practices. I enjoy interacting with patients and their families. Each patient is unique, each brings personal challenges, as well as many rewards.

I was given an amazing opportunity recently to be trained in other position within the dental practice of Portnoy and Tu, DDS, PC. This is a very exciting and challenging learning experience! Each day brings new experiences and personal growth. For this, I am truly blessed.

I live in Saint Johns with my husband Ross and two basset hounds, Bubs and Feeney. I have two grown children. Steven, who lives in Sweden, and Jenny, who lives in California. I also have grandchildren. We enjoy road trips, hiking, and puttering in the backyard.”

Jerome Essenmacher

Jerome Essenmacher

Facility Support Specialist

“I have been working for Portnoy and Tu DDS PC since 2012 as a Facility Support Specialist. This position allows me to utilize my talents in fixing, repairing, and building things. It also allows me to have a flexible work schedule so that I can spend more time with my son, who is the love of my life. I graduated from Breckenridge High School in 1999. I have an Associate degree in Criminal Justice from Davenport College in 2001. My hobbies include any activities that pertain to the great outdoors, such as hunting, fishing, biking, hiking, swimming, and camping. When I'm not working for Dr. Portnoy and Dr. Tu, I have my own landscape business. I love to design waterfalls, Koi ponds, and gardens.”

Monique Brown

Monique Brown

Business Coordinator

"I graduated from Ross Medical School in 2012 and have been the the dental field ever since then. I started off as a dental assistant and now work as a front desk coordinator. It is such a great feeling to make each patient happy and for them to have a beautiful smile when they leave. I have been married since 2014. I have two boys and a step-daughter. I love watching my boys grow into young men along with watching my step-daughter grow into a young lady. In my spare time, I enjoy being outside."