dr sieger

Andrew D. Sieger, DMD

Dr. Sieger has been with us since 2015. Dr. Sieger grew up in Lititz, Pennsylvania, and graduated magna cum laude from both Penn State in 2010, and Temple University’s Kornberg School of Dentistry. He was class president at Temple. He completed his General Practice Residency with the VA Northern California Healthcare System. Dr. Sieger appreciates the incredible staff at Sieger Family Dentistry, that cares deeply for all of our patients. He is dedicated to providing great leadership for the practice and giving our patients a first-class experience.

Dr. Sieger is married to his wife Anj, and in his spare time he enjoys golfing, traveling and cooking, and spending time with his family.

dr backof

John S. Backof, DDS

Dr. Backof has been a part of the practice since 1987. He succeeded Dr. Rodney Stauffer who retired after 32 years in dentistry. Dr. Backof notes that we have been serving patients since 1931!

Dr. Backof graduated with a degree in Engineering from West Point in 1975 and served in the Army as a Nuclear Weapons Employment Officer. In 1982, he graduated from the Kornberg School of Dentistry at Temple University. He completed his General Practice Residency at Fort Sill, Oklahoma as a member of the U.S. Army Reserve, and is a retired lieutenant colonel in the reserves. He is a past president of the Lancaster County Dental Society. Dr. Backof led our practice for over 30 years and watched it grow exponentially; and he has remained very active in the community. He values the relationships he has with the staff and patients.

Dr. Backof is married to his wife Deborah and has two children: his son Bradley who is married with two children and lives in Virginia and a daughter Stephanie, who is married with eight children and lives in Florida. When not at work, Dr. Backof likes golfing and traveling. He especially enjoys visiting his children and grandchildren.

dr melissa

Melissa B. Della Croce, D.M.D.

Dr. Melissa Della Croce received her undergraduate degree in Biology from King’s College in Wilkes-Barre, PA. She completed her dental education in 2006 at Temple University School of Dentistry, where she earned a Doctor of Medical Dentistry Degree. She is a fourth-generation dentist, and proud to follow in the footsteps of the five men that graduated from Temple University School of Dentistry before her. Dr. Della Croce maintains membership in the Academy of General Dentistry, American Dental Association, Lititz Ambucs, and National Association of Professional Women. She is passionate about continuing education, and as a member of PEAK, she is working towards her fellowship in the Academy of General Dentistry.

Meet Our Team
With a dependable and caring set of team members, you can feel more at ease during your visit with our dentists. Since several of our team members have been with us many years, you can count on seeing a familiar face when you walk into Sieger Family Dentistry. For high-quality service and dental care in New Holland, Pennsylvania, please get in touch with our office soon. We look forward to welcoming you into our established practice.


Lorie is an expanded functions dental assistant and has served in our office since 1994. She graduated as an EFDA from Harcum College in 2009. At Sieger Family Dentistry, Lorie excels in creating a relaxed and comfortable environment for our patients and providing them with a positive dental experience. She brings her enthusiasm and upbeat attitude to work with her each day, as well a wealth of experience and a desire to restore our patients’ smiles and relieve their pain.

Lorie is married with two children and away from the office she looks forward to spending time with friends and family, traveling, going to the beach and gardening.


Sherry is one of our expanded function dental assistants and has been a part of Sieger Family Dentistry for 15 years. She earned her Bachelor of Science in Biology from Messiah College and received her EFDA training at Harcum College. Sherry enjoys the fantastic team of dental professionals, and the wonderful patients from our unique community. Sherry uses her attention to give our patients a great dental experience.

Sherry has been married to her best friend and husband Lee for 15 years. When she is not taking care of our patients, she enjoys reading, traveling, playing board games with friends, and relaxing with her pet cats.


Nicole has been a Dental Assistant at Sieger Family Dentistry since May 2013, when she graduated from YTI. She enjoys getting to know our patients and giving them the best care possible. Nicole also works part-time at her parents’ candy store. When she is not working, she enjoys spending time with her family, exploring the outdoors, reading, drawing, and playing outside with her kids and dog.


Leslie is one of our dental hygienists and has worked at Sieger Family Dentistry since 2012. She is a graduate of the University of Pittsburgh. Leslie is proud to be a member of a fantastic team of dedicated, caring and experienced professionals. She makes sure that when she serves her patients by 110 percent to her job.

Leslie and her husband live in New Holland and have two grown children and a wonderful daughter and son-in-law. She is anxiously awaiting the arrival of her first grandchild! Away from the office, Leslie enjoys sports, reading, music and relaxing on the beach. But most all, she loves spending time with her family and loved ones. She also wants to dedicate more time to the organizations that have impacted her life


Terri has been an administrative assistant at Sieger Family Dentistry since 2001. She graduated from Conestoga Valley High School, where she focused her studies on the business curriculum. She enjoys the caring environment in our office and working with the great team members. She always does her job to the best of her abilities and makes our patients feel welcome. Terri and her husband live in New Holland, and when she is not in the office, Terri enjoys flower gardening, going to the beach and traveling. She also likes to spend time with her children, grandchildren and friends.


Carol has been an Administrative Assistant at Sieger Family Dentistry since August 2000, and she now primarily handles the business office duties of the practice. She previously earned a Bachelor of Science degree in Nursing, so she enjoys providing patient care along with developing close friendships with our “dental patient family”. Carol lives near Lititz with her husband, and she loves spending time with her grown daughters and family, including her two grandsons. Special times are spent enjoying family and friends in the Finger Lakes.


Dianna is an Assistant at Sieger Family Dentistry, as well as the Lead Administrative Assistant at the front desk. Dianna was born and raised in Western PA and moved to this area in 2002 when she attended HACC for their nursing assistant program. She joined the team in February 2006. She currently lives in Reamstown with her husband and two daughters. In her spare time, Dianna enjoys spending time with her family, cooking, going to the beach, and traveling to Pittsburgh to visit family and friends, and to watch all Pittsburgh sports!


Beth is a 2001 graduate of Harcum College with an Associate of Science Degree. She has been a Registered Hygienist at Sieger Family Dentistry since 2007. Beth resides in Leola with her husband and three young boys. In her free time, she is usually running someone to a sporting event or a school activity.


Anita is a registered dental hygienist and has worked in our office since 1989. She graduated from the Delaware Technical Institute in 1979 and received the Outstanding Student Award from the Delaware Dental Association. She loves seeing the generations of families that call Sieger Family Dentistry home. Anita and her husband enjoy motorcycle trips on their Harley, and spending time at the beach, but her biggest priorities are her children and grandchildren.


Diane graduated from Temple University School of Hygiene, where she received the Ruth Heck Award for Outstanding Clinician. She has worked part-time as a Registered Hygienist at our practice for over twenty years. Diane enjoys travelling and reading, as well as volunteering at Wellspan Ephrata Hospital. She resides in Ephrata with her husband and has two adult children.


Kimberly is a dental assistant and also helps out as an administrative assistant at the front desk. She has been with [practice-name] since 2016. She attended Willow Street Vo-Tech and studied dental assisting. For Kimberly, the best part of her job is at Sieger Family Dentistry is making our patients smile! Kimberly is the mother of four children, and enjoys riding bikes with them, and walking her dogs. She also looks forward to summer every year!


Krista is a registered dental hygienist and has been a part of our team since 2015. She graduated from Harrisburg Area Community College in 2002 with an Associate of Science degree. Krista loves the caring atmosphere and the integrity of the doctors and staff at Sieger Family Dentistry. She makes creating a great patient experience her number one priority with every person who comes into our office. Krista lives with her husband and two sons, and enjoys motorcycle racing, gardening, going to the beach and raising her backyard chickens!