Andrew Arriola, D.D.S.

Hello. I am Dr. Andrew Arriola.  I grew up in Southern California, more specifically, West Covina.  In high school, I played a variety of sports- basketball, soccer and baseball, my favorite being baseball. I also played the saxophone in the high school band.  After attending USC for one year, I decided that the smaller Cal Poly University was more my style. That is why, after graduating from UCLA Dental School in 1986 with my Doctor of Dental Surgery degree, I settled and opened my practice in the quaint Temecula Valley. I have been at the same location for more than 25 years.

My associations and memberships include: The California Dental Association, Tri-County Dental Society, The Academy of CAD-CAM Dentistry, I am a member of the American Dental Association, The Academy for Sports Dentistry and ICOI -International Congress of Oral Implantologists-which is an association for World Class Dental Implant Training.

Some of my community and outreach involvements include serving as the Team Dentist for Temecula Valley High School for over 15 years as well as the minor league hockey team the Sabers. Custom-Fitted mouth guards are provided by my office for these organizations as well as treating their sports-related dental injuries and any dental trauma the players may suffer. I have supported the UCLA Dental School by accompanying and helping oversee the students on their
bi-annual Honduras Missions trip where we treated hundreds of the locals in the middle of the Honduras jungle. I also have served as the Team Dentist for the San Diego Padres minor league baseball team ‘The Lake Elsinore Storm’. Lastly, I volunteer at my church in the Sound Ministry.

On a personal note, I am happily married.  Together, with my wife Renee, we love to spend time with our family and friends, we like to cycle, volunteer at our church, attend concerts, and sporting events–especially baseball games.  I have two great sons, Tony and Nick, and among other things, they both play on the worship team at church. And just for the record, although I serve as the Dentist for the Padres Organization, I wear Dodger Blue.

In conclusion, I have always wanted to be a dentist. I really am passionate about my job and pride myself in being a highly skilled dental surgeon. Furthermore,  giving my patients the best care myself and the industry offers is of the utmost importance to me as is connecting and communicating with them about their dental concerns, well-being and dental needs.

Please let me introduce you to my fantastic Dental Team:


Charles E. Issac, D.D.S.

Dr. Charles E. Isaac, D.D.S. was born in Peoria Illinois in 1950, but lived in Southern California since 1954. He attended the University of La Verne in 1972 and received a B.A.(Cum Laude) with a major in Chemistry and a minor in Biology. After ULV, he attended USC Dental School, graduating in 1976 with a Doctor of Dental Surgery degree. He has practiced in Temecula since 1993. Dr. Isaac has been married to his wife Mary Ellen for over 40 years and they enjoy spending time with their 2 grown sons. Dr. Isaac says that he enjoys working at Winchester Dental Group. Presently, he limits his area of practice to diagnosis, taking x-rays and oral hygiene. Winchester Dental is proud to announce that recently Dr. Isaac was honored with a Lifetime Achievement Award from the American Dental Association. Dr. Isaac enjoys his job and with his easy going personality, he effortlessly puts patients at ease. We are fortunate to have had Dr. Isaac bring his love of Shania Twain’s music and his Dental expertise to our office for over 14 years and counting.


Cynthia Ann Telesio, R.D.H.

Cynthia Ann Telesio has been practicing dental hygiene for over 35 years. Not only is Cynthia a graduate of University of Detroit Dental School with a Bachelor of Science Degree but she also earned an Advanced Degree as a Registered Dental Hygienist in Alternative Practice from the University of Pacific Arthur A. Durgoni School of Dentistry. Cynthia has served on the California Board of Registered Dental Hygienist Examiners as well as working at the Kadena Air Force Dental Facility in Japan as a RDH and Instructor of Prophy Technicians. She has been married for 35 years, has 1 daughter and wonderful grandchildren. One of Boards that Cynthia has served on is called S.M.U.R.F.S. -Single Mothers Unified in Rewarding Fellowship- which is through a ministry at Rancho Community Church. Cynthia has been at Winchester Dental for over 17 years. Throughout her time here she has been tremendous asset, Our office is grateful for the great knowledge, expertise and warmth she conveys to our patients. Cynthia truly has a passion for her job.


Mark Kennard, R.D.H.

Mark Kennard graduated from Loma Linda University School of Dentistry with a Degree in Dental Hygiene in 1994. He has been part of the team at Winchester Dental Group since 2006. A Little known fact about Mark is that he was a track star at the University of Missouri where he received an athletic scholarship. Mark and his wife Kim have a musical son named Luke. In his spare time, Mark likes to write, moreover, he is currently working on his second novel. During football season, Mark helps out at the Temecula Valley High School varsity games as part of the Sports Medicine Team. Winchester Dental is so fortunate to have Mark working at our office. Marks relaxed personality is always welcomed by patients as he eases any anxiety they may have. His passion for his work, his great expertise, and the fact that he always goes over and beyond for our Dental Team and our patients makes him a vital part of our office.


Brenda Barnes, office administrator R.D.A.

Brenda Barnes was born and raised in Southern California. She is a graduate from Mt. San Jacinto College with an Associates of Science degree as well as being a Registered Dental Assistant with the State of California. Brenda has been in the dental field for more than 25 years. She is the proud mother of 4 and also has 4 wonderful grandchildren. Brenda is highly skilled and extremely knowledgeable and an essential part of our dental team. As our Office Administrator, she expertly manages our front office smoothly and effectively. Brenda will be one of the first people to greet you with a smile when you walk into our office. We have been blessed to have had Brenda with Winchester Dental for over 20 years.


Leo Flores

Leo Flores.  Although Leo was born in Southern California, he was raised in Northern California. After attending Monterrey Peninsula High School, Leo served in the US Army from 1973 to 1977. He attended Sequoia Junior College earning an AA in Business Management. In the mid-1980’s, Leo joined the US Army reserve. From there, he received his Dental Assistant Certificate from Concord Career College in San Bernardino. Subsequent to receiving his Dental Assistant Certificate, Leo did his internship here at Winchester Dental Group and have been working with us ever since. Currently, he is pursuing his Bachelor’s Degree at Ashford University. Leo recently retired from the Army. For over 17 years Leo has been energizing our office with his expertise, jokes and his own non-stop energy, Leo is an extremely important part of our Dental Team.


Chanelle O’Shell

Chanelle O’Shell works on our Dental Team as one of our knowledgeable Dental Assistants. She has grown up in Temecula and has been involved in many activities in and around the area. She attended Concord College majoring in Dental Assisting. She plans on furthering her dental education by studying to become a RDA. When not working at the office, Chanelle enjoys any outdoor activity such as hiking, and surprisingly, dirt-bike riding to name a few. We love having her at Winchester Dental. Her energy, enthusiasm, knowledge and smiles she brings to our patients and our team is immeasurable.


Renee Arriola

Renée Arriola grew up in West Covina California. She studied at Azusa Pacific University majoring in Human Development. Renee works at Winchester Dental as our Marketing, Social Media and Event Planning Coordinator. She helps plan and implement our semi-annual Kids Day, helps coordinate our annual football mouthguard fund raisers for the local high schools, handles our office donations as well as our our Patient Newsletter. Renee says she loves being a part of Winchester Dental’s fantastic team. She used to be a competitive swimmer at the national level and today she is still so passionate about swimming that in her spare time she teaches swimming to children. She is happily married to Dr. Arriola and they love cycling and swimming together, playing tennis, going to concerts and baseball games among other things. Renee and Dr. Arriola also love to spend time with family and friends. She has 3 wonderful children Wesley, Arielle and Jordan. All 3 of them find time in their busy schedules to teach swimming as well