South Main Medical Plaza - 260 East Ontario Ave. Suite 205
Corona, California 92879 :: (951)735-2608
We can make you smile!
Since 1965 Dr. Lionel Rentschler has been making people smile. In 1989 his daughter Dr. Lisa Rentschler joined the practice and together they continued to share their love of dentistry by helping patients feel comfortable and confident in their care. In 2008 we welcomed the newest member to our practice, Dr W.R. Blackwelder. Our practice is dedicated to providing patients with the highest quality of esthetics and individualized dental care. We are committed to providing this in a reassuring, honest and supportive manner which will answer your questions and help you be an effective partner in your dental care. We welcome new patients and thank our existing patients for their continued confidence. We are happy to work with you in making financial arrangements.
In March of 2008 our practice relocated to our new facility in the South Main Medical Plaza. Our office hours are Monday through Thursday, 8 a.m. to 6 p.m. and Friday from 7 a.m. to 2 p.m. We make every effort to stay on schedule, and ask that our patients be on time as well. For your convenience, we will confirm your dental visit 2 days before the appointment. If you need to reschedule, we ask that you please give 24 hours notice so that we may offer the time to another patient. If an emergency should arise, someone will always be available to respond to your concerns. Please call as early in the day as possible so that we may work you in to the schedule. If the problem arises after hours, by calling our office (951)735-2608 the answering service will forward the message to the Dr. on call.
Dr Lionel E. Rentschler
Dr. Lionel Rentschler was born in Bell, California and graduated from La Sierra University in Riverside, California. Loma Linda University bestowed his Doctor of Dental Surgery Degree. He completed an externship in Internal Medicine and Physical Diagnosis at the University of Southern California Los Angeles County Medical Center. He later earned a Fellowship in the Academy of General Dentistry. Dr. Rentschler has lived in Corona for forty six years and has been happily married to his wife Sharon, for fifty one years. They are the proud parents of Lisa Rentschler D.D.S., a partner and Stanton Rentschler, a teacher.
Dental Practice
Dr. Rentschler was asked by Waldo W. Wareham D.D.S., professor of restorative and pediatric dentistry at Loma Linda University School of Dentistry, to join him in the practice of dentistry in Corona in 1965. Dr Rentschler served on the staff of Kern County Hospital, Circle City Hospital and Corona Community Hospital. He has been a part of Corona's health care community for over forty six years. He has served as the chairman of the board of trustees of the hospital that is now Corona Regional Medical Center. Dr Rentschler trained with Dr. Robert James at Loma Linda University in clinical implant dentistry. Professors at Loma Linda University School of Dentistry invited him to lecture in classes of dental ethics, dental materials and practice management. He was one of the first dentists to offer twenty-four hour availability to his patients and others in need of emergency service.
Dr Lisa Rentschler
Dr. Lisa Rentschler moved to Corona with her parents in 1965. She grew to love dentistry working in her father's office since the age of twelve. Graduating from La Sierra with a Bachelor of Science Degree in Biology, she continued studies at Loma Linda University School of Dentistry, receiving a Doctorate of Dental Surgery Degree in 1989. During her four years there she developed and presented dental research on a local and national level and later published her work. Dr. Lisa, in her senior year, received the Waldo Wareham award for pediatric dentistry and the Quintessence Award for academic achievement in research. Dr. Rentschler takes a special interest in providing cosmetic dentistry as well as restorative and periodontal care and continuously educates herself in all aspects of patient care. She enjoys seeing both adults and children in her practice. She is a member of the American Dental Association, Academy of General Dentistry and The American Academy of Cosmetic Dentistry. When she is not practicing dentistry, Dr. Lisa enjoys spending time with her family and friends.
Dr W.R.Blackwelder
Dr. Wallace "Bud" Blackwelder was born in Loma Linda, California and has lived in Southern California all his life. After completing four years at Pacific Union College, he returned to Loma Linda University School of Dentistry where he earned his Doctor of Dental Surgery degree in 1983. He also participated in an externship at the Navajo Indian Dental Clinic and Hospital in Monument Valley, Utah where the program was concentrated in taking care of patients with oral and dental diseases. Dr. Blackwelder has owned a solo private practice since 1984. He is a current member of the American and California Dental Associations as well as a member of the San Gabriel Valley, and Tri-County Dental Societies where he regularly attends a variety of dental continuing education courses. He particularly enjoys restorative and cosmetic dental procedures. Additionally, he prides himself in making his patients feel comfortable and relaxed during procedures, and leaving the office a little more educated than when they came in! Dr. Blackwelder has been a resident of Corona since 1999. He and his wife, Dr. Kimberley Ackley, a Corona Optometrist, have three teenage sons, Jordan and twins Ryan and Braden. They love family activities such as going on RV trips with other families, going to baseball games, playing volleyball, and serving their local church.

Our Office

From the 91 freeway heading EAST
  • Take the Main St exit South
  • Turn right at S Main St and go 1.7 miles to Ontario Ave
  • Turn left at E Ontario Ave and go 0.2 miles
  • The South Main Medical Plaza is on the right

From the 91 freeway heading WEST
  • Take the Main St exit South
  • Turn left at S Main St and go 1.7 miles to Ontario Ave
  • Turn left at E Ontario Ave and go 0.2 miles
  • The South Main Medical Plaza is on the right

From the 15 freeway heading NORTH
  • Take the Ontario Ave exit
  • Turn left at E Ontario Ave go 2.2 miles to S. Main Street
  • Make a U-turn at S Main St
  • The South Main Medical Plaza is on the right

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The People That Make It Work
The Place Where We Take Care of You
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