Meet Our Associates

Drs. Dexter, Rich, Jeff, Cndy, Chris - Center Drs Andrea and ChristianOur doctors and staff work together as “family” team members with one goal in mind – to make every child’s dental experience positive and enjoyable. Child psychology is a common second degree in addition to their Doctor of Dental Surgery and Specialist in Pediatric Dentistry or Specialist in Orthodontics degrees. Understanding the child patient is critical to successfully treating their dental conditions, as well as making their office experience enjoyable and rewarding. We are parents ourselves and we are specialists in helping kids smile.

Dr. R. Christian Solem, DMD, MS Specialist in Orthodontics

R. Christian Solem, DMD, MS (Dr. Christian) is committed to helping and empowering others through oral health, Dr. Solem began his career in dentistry at the Harvard School of Dental Medicine in Boston, graduating cum laude. He completed an undergraduate degree in Chemistry at the University of California, Berkeley. 

During dental school, Dr. Christian pursued an elective four-month dental externship at Boston Healthcare to rehabilitate homeless patients recovering from substance abuse and mental illness. He also trained in the pediatric dentistry clinic at Boston Children’s Hospital, where he treated children with special needs and illnesses. Motivated by this work, Dr. Christian pursued an orthodontic residency program and graduated as a Specialist in Orthodontics from the University of California, San Francisco.

In 2013, Dr. Christian practiced for a year as a craniofacial orthodontist at Mott Children’s Hospital at the University of Michigan. He treated children with rare diseases and developmental anomalies, including cleft lip and palate. This work was done in close collaboration with other medical disciplines (plastic surgery, oral and maxillofacial surgery, speech pathology, and audiology) to provide complex orthodontic treatment to all age-ranges of children. He also served on the pediatric craniofacial team at UCSF and taught as a clinical instructor in the graduate residency program. Recently he has worked as an orthodontic specialist at the Kaiser Permanente hospital in Portland, OR.

Dr. Christian and his two brothers grew up within biking distance to the Pacific Ocean in Southern
California, where he spent most of his free time in the water and at the beach. He loves spending time
outdoors and looks forward to calling sunny Sacramento home.

Dr. Chris Lee Specialist in Pediatric Dentistry

Christopher S. Lee, DDS (Dr. Chris), received his Bachelors of Science degree in Developmental and Cell Biology from the University of California at Irvine. He then earned his Doctor of Dental Surgery from the UCLA School of Dentistry. Upon completion of dental school, he moved across the country to Yale-New Haven Hospital in New Haven, Connecticut where he completed his Specialty in Pediatric Dentistry for Children. He is a Board Certified Specialist in Pediatric Dentistry and in 2015 became a Diplomate of the American Board of Pediatric Dentistry.

Dr. Chris and his wife now call Granite Bay their home. His biggest passions in life are building relationships with family and friends by making them laugh. His hobbies include playing basketball, fishing, and playing video games. You may find him in the office singing to the latest Disney songs.


Dr. Rich Knight Specialist in Pediatric Dentistry

Richard B. Knight, DDS (Dr. Rich), graduated with a Bachelor’s Degree in Science from Sonoma State University. In 2002, he graduated at the top of his class from the University of California San Francisco with a Degree in Dental Surgery. Realizing his true calling to work with kids, he then went on to complete a three-year residency program to become a Specialist in Pediatric Dentistry in 2005. During this time, he received a Master’s Degree in Oral-facial Sciences. He is a Board Certified Specialist in Pediatric Dentistry and in 2016 became a Diplomate of the American Board of Pediatric Dentistry. Even now, Dr. Rich is committed to staying current on new research and products to assure that his patients receive the best and safest treatment available.


It is the goal of Dr. Rich to make every dental experience fun and rewarding. As a father of three, he understands that children are individuals with unique needs and views of the world around them. He is able to utilize their natural curiosity to teach them about the importance of good oral health.

Dr. Rich’s interests include camping, hiking, bike rides, and family BBQs.


Dr. Andrea Sosa General Dentist Practice Limited to Pediatric Dentistry

Andrea A. Sosa, DDS (Dr. Andrea), received her Bachelor of Science in Genetics from the University of California, Davis. She graduated with a Doctor of Dental Surgery degree from the University of the Pacific School of Dentistry, San Francisco.

Dr. Andrea enjoys traveling and spending time with her family. In her spare time, she likes to relax through cooking and practicing yoga.

Her favorite thing about being part of Weideman Pediatric Dentistry and Orthodontics is her love for our patients. She feels no matter what age, each child is exceptional, and she enjoys discovering their delightful personalities. Seeing them grow and helping them develop good oral health is one of her greatest rewards.

Dr. Dexter Yee Specialist in Pediatric Dentistry

Dexter Yee, DDS (Dr. Dexter) was born and raised in Sacramento, CA. He graduated from UC Berkeley in 2010 with a degree in Molecular and Cellular Biology. It was during this time when he developed his passion for dentistry while volunteering in the dental section of the Berkeley Free Clinic. He went on to Tufts University School of Dental Medicine in the heart of downtown Boston. He graduated in the top 10% of his class, received Cum Laude distinction, and was inducted into the national dental honor society, Omicron Kappa Upsilon. Realizing his passion for working with children, he continued his training specializing in Pediatric Dentistry at Yale New Haven Hospital. 

In his free time, Dr. Dexter is often engrossed with board games, reading fictional novels, and spending time with his family. He is also enthusiastic about rock climbing, exploring the outdoors, and traveling to new cities and destinations.