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, daughter Evelyn and sons Keegan & Hudson. 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
  • Honored 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 has over 35 years of experience as an implant dentist and he has extensive training in both placing and restoring dental implants. 

After earning a bachelor’s degree in Zoology from Miami University, he attended The Ohio State Dental School, where he graduated in 1979 with his doctor of dental surgery (DDS). 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 for soldiers of the 1st Infantry Division and their families. While there, he earned the Expert Medical Field Badge and the Army Commendation Medal. 

Dr. Fennell was first introduced to implant dentistry 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, where he was awarded the Outstanding Extern Award. Dr. Fennell earned Diplomate Status from the American Board of Oral Implantology in 2001. The Board’s mission is to “ certify individuals at the highest standards of competency in diagnosis, surgery, and prosthetic treatment in the specialty of Implant Dentistry……” Go to www.aboi.org to learn more about this certification. 

Dr Fennell is on the editorial board of the Journal of Oral Implantology, he has served on the education board of the American Academy of Implant Dentistry, and has lectured for over 20 years to other implant dentists around the country on topics ranging from head and neck anatomy to platelet rich plasma and platelet rich fibrin use in implant surgery. 

Dr Fennell is also certified to administer IV Sedation and maintains certification in Advanced Cardiac Life Support. 

In 2019 he was named an Honored Fellow of the Midwest implant Institute for his lifetime achievements in dental implantology.

CASEY CHANATRY, DDS

Training and Professional Affiliations:

  • Dental School: CWRU School of Dental Medicine
  • American Dental Association (ADA) Member
  • Ohio Dental Association (ODA) Member, Cleveland
  • Delta Sigma Delta, Cleveland

CASEY CHANATRY, DDS

Training and Professional Affiliations:

  • Dental School: CWRU School of Dental Medicine
  • American Dental Association (ADA) Member
  • Ohio Dental Association (ODA) Member, Cleveland
  • Delta Sigma Delta, Cleveland

Dr. Casey Chanatry was born in upstate New York, resided in Baltimore for 8 years and finally landed in Mason, Ohio with her family. She has been practicing as an AEGD Resident since July 2021 at the Dayton VA Medical Center, Dayton, Ohio after receiving her Doctor of Dental Medicine in Cleveland, Ohio. Dr. Casey is well-versed with medicinally complex patients and has a true passion for esthetic and cosmetic dentistry with a conservative approach to creating optimal treatment plans for her patients. She practices with a prudent eye for detail and ambition for patient satisfaction.