Dental Staff


Patty McKenna, RDA / Office Manager

l’m Patty McKenna and have had the pleasure of working in our dental office for over 25 years as an RDA and Office Manager. l’ve been very fortunate to have worked with my great co-works for most of these years and to have the nicest patients in all of Petaluma.

My husband Dan and I moved to Petaluma 30 years ago and have raised our son and daughter here and have enjoyed all Petaluma has had to offer our family.

I enjoy spending time with our family, cooking, walking, hiking trails out at the coast and all around beautiful Lake Tahoe. I also enjoy traveling and have visited many beautiful and fascinating places but the highlight was for our 25th wedding anniversary we did a trek in the Himalayan’s in the Annapurna Region to Machhapuchhre base camp. Look forward to seeing you in our dental office or just around Petaluma!


Michelle Nelson, RDH

Michelle Nelson is a Dental Hygienist with over 16 years of experience. She enjoyed working those years with the doctors in an office with a wonderful staff and patients.

She now has the pleasure to continue her work with Dr Mona Mahmoodi. Her special interest are ballet, fishing off a kayak out in the ocean, backpacking, yoga and cooking.


Elizabeth Stone, RDH

My name is Elizabeth Stone I am registered dental hygienist. I was born and raised in Petaluma, CA. I have worked in both Petaluma and San Rafael for over six years. I love my job it is very rewarding, I get to take care of patient’s oral health and help educate about the oral cavity and and how it affects their overall health.

I am married to my husband Kevin who is a firefighter paramedic, we have a son named Jesse and we live here in Petaluma. We enjoy all Petaluma has to offer, great restaurants, shopping, landscape, community and all the wonderful community events Petaluma offers.


Stephanie fajardo, RDH

Hi, My name is Stephanie Fajardo. I grew up in Petaluma, but now I live in the beautiful city of Sonoma. I have been married for 14 years and have 2 kids, Angelique and Roman. I enjoy hiking, being outdoors, and spending time with my family. I love being a dental hygienist because I get to educate patients about their oral health and I love to make them feel comfortable in the dental chair.


Maria, RDA

Maria grew up in San Rafael and Novato with her family that include(s) 3 older brothers. She graduated from Santa Barbara Community College and College of Marin. She has spent more than 15 years of her life in Petaluma, having lived here since 1998. She married her husband, Rob, and has 2 children, both a daughter and a son. She started as a DA in 1993 and became a registered DA in 1996. Her hobbies include fitness bootcamp, walking, running, hiking, and watching her children grow and play sports. Maria is surrounded by a caring, interconnected dental team at the office and a loving family at home. Her daughter, Sophia, plays soccer and attends Kenilworth Junior HighSchool. Her son, Joey, plays baseball at Casa Grande High School.

Contact Us

Park Plaza Dental

Operation Hour

Office Hours


By Appointment Only


9:00 am-6:00 pm


8:30 am-6:00 pm


9:00 am-6:00 pm


8:00 am-2:00 pm