Our Doctors

Our professionals at Fennell, Yoxthimer, and Associates DDS are each highly trained and experienced so that they can offer patients the highest quality of care.

Rob Yoxthimer, DDS

Training and Professional Affiliations:

  • Dental School: The Ohio State University College of Dentistry
  • Certifications: IV Sedation from Miami Valley Hospital
  • Advanced Cardiac Life Support certified
  • Trained in All-on-4 Implant restoration techniques
  • American Dental Association
  • Ohio Dental Association
  • Cincinnati Dental Society

Rob Yoxthimer, DDS

Training and Professional Affiliations:

  • Dental School: The Ohio State University College of Dentistry
  • Certifications: IV Sedation from Miami Valley Hospital
  • Advanced Cardiac Life Support certified
  • Trained in All-on-4 Implant restoration techniques
  • American Dental Association
  • Ohio Dental Association
  • Cincinnati Dental Society

Dr. Rob Yoxthimer, a native of Loveland, Ohio, joined the practice in July 2007. He earned a BS in Chemistry from Xavier University, after which he spent five years working as a research chemist for Procter & Gamble. Following God’s prompting, he then attended The Ohio State University College of Dentistry and earned a Doctor of Dental Surgery Degree. Dr. Yoxthimer has an additional certification to administer IV Sedation so that his patients can have access to comfortable, anxiety-free dental care. He maintains certification in Advanced Cardiac Life Support (ACLS).

Dr. Yoxthimer is particularly interested in IV sedation dentistry, management of medically compromised patients, restorative and endodontic dentistry, implant restorations including All-on-4 techniques, dental aesthetics, oral surgery, oral pathology, and pediatric dentistry.  He and his wife, Bekah, also a dentist, have also spent time on short-term dental missions work in Honduras. They have three adventurous boys:  Tyler 12, Grant 10, and Zane 6.  In his spare time, Dr. Yoxthimer loves spending time with his family, as well as everything outdoors including hiking, camping, canoeing, fishing, photography, woodworking and Jeeps.

Nathan Fennell, DDS

Training and Professional Affiliations:

  • Dental School: The Ohio State University
  • Certifications: IV Sedation from Miami Valley Hospital
  • Advanced Cardiac Life Support certified
  • American Dental Association
  • Ohio Dental Association
  • Cincinnati Dental Society

Nathan Fennell, DDS

Training and Professional Affiliations:

  • Dental School: The Ohio State University
  • Certifications: IV Sedation from Miami Valley Hospital
  • Advanced Cardiac Life Support certified
  • American Dental Association
  • Ohio Dental Association
  • Cincinnati Dental Society

Dr. Nate Fennell grew up in Cincinnati, Ohio, graduating from Milford High School. He attended Samford University in Birmingham, Alabama, where he graduated Summa Cum Laude with a Bachelor’s degree in Biology. He then attended the Ohio State University College of Dentistry and graduated Magna Cum Laude with his Doctor of Dental Surgery degree. Dr. Fennell enjoys a wide range of general dentistry, including restorative dentistry, pediatric dentistry, fixed and cosmetic dentistry, endodontics, and oral surgery. Dr. Fennell is certified to administer IV sedation and he embraces the challenge of treating the nervous dental patient. He also has training in treating the medically compromised patient.

When not treating patients, Dr. Fennell enjoys spending time with his wife Ashleigh and their daughter Evelyn and son Keegan. He also enjoys spending time with family and friends, the outdoors, and playing golf.

James Fennell, DDS, FAAID, DABOI/ID,FMII

Training and Professional Affiliations:

  • Dental School: The Ohio State Dental School
  • Residency: Womack Army Hospital, Ft. Bragg
  • Diplomate: American Board of Oral Implantology
  • Associate Fellow: American Academy of Implant Dentistry
  • Fellow: Midwest Implant Institute
  • Ohio Dental Association
  • American Dental Association

James Fennell, DDS, FAAID, DABOI/ID,FMII

Training and Professional Affiliations:

  • Dental School: The Ohio State Dental School
  • Residency: Womack Army Hospital, Ft. Bragg
  • Diplomate: American Board of Oral Implantology
  • Associate Fellow: American Academy of Implant Dentistry
  • Fellow: Midwest Implant Institute
  • Ohio Dental Association
  • American Dental Association

Dr. James Fennell is a dentist with over 40 years of experience and a member of the American Dental Association and Ohio Dental Association. After earning a bachelor’s degree in Zoology from Miami University he attended The Ohio State Dental School, where he graduated in 1979. Following dental school, Dr. Fennell completed a residency at Womack Army Hospital, Ft. Bragg in North Carolina before spending three years in Goeppeingen, Germany, where he served as Officer in Charge of dental services or soldiers of the 1st Infantry Division and their families. There, he earned the Expert Medical Field Badge and the Army Commendation Medal.

Dr. Fennell is particularly interested in dental implantology, which he was introduced to as a dental implant research assistant while studying at Ohio State. His formal training in dental implants began at the Midwest Implant Institute in 1984, and he was awarded the Outstanding Extern Award in 1993. Dr. Fennell has also earned Diplomate Status from the American Board of Oral Implantology. He is also certified to administer IV Sedation and maintains certification in Advanced Cardiac Life Support. He is also an Associate Fellow of the American Academy of Implant Dentistry.

Douglas A Dix, DDS

Training and Professional Affiliations:

  • Dental School: The Ohio State University College of Dentistry
  • Fellow: Academy of General Dentistry
  • Peter Dawson Complete Dentistry Series 1, 2 and 3
  • Piper TMD Series
  • L.D. Pankey Continuum 1, 2 2E, 3, 3E, 4 and Head and Neck Dissection
  • American Dental Association
  • Ohio State Dental Association
  • Cincinnati Dental Society

Douglas A Dix, DDS

Training and Professional Affiliations:

  • Dental School: The Ohio State University College of Dentistry
  • Fellow: Academy of General Dentistry
  • Peter Dawson Complete Dentistry Series 1, 2 and 3
  • Piper TMD Series
  • L.D. Pankey Continuum 1, 2 2E, 3, 3E, 4 and Head and Neck Dissection
  • American Dental Association
  • Ohio State Dental Association
  • Cincinnati Dental Society

Dr. Douglas Dix is a native of Ohio and joined the practice in February 2019. He has over 35 years of experience practicing general dentistry. Dr. Dix earned a BS in Biological Sciences from the University of Cincinnati and a Doctor of Dental Surgery from The Ohio State University College of Dentistry. He was awarded a Fellowship with the Academy of General Dentistry in 2005. Areas of specialty include crown and bridge, rotary endodontics, implant restoration and cosmetic dentistry.

In his personal time, Dr. Dix enjoys golf, boating, hiking and spending time with friends and family. He also is an active supporter and avid fan of the Buckeyes and Bearcats.