service with a smile
Meet Our Team
Our model for success
Cornerstone Dental Specialties Success Platform
Your success, skills and passion
“Your Experts ... Your Office”
Leadership
All Members
Associate Owner
Executive Team
Endodontists
Dentists
Support Staff
Owner
Founder & President
Dr. Hamid R. Abedi
Email
habedi@Corsgroup.com
Phone
800-810-0268
Fax
949-404-4664
DDSThe Royal London Hospital, London, EnglandMSEndodontic Specialty, Loma Linda University, Loma Linda,
Chief Executive Officer
Thomas von Sydow
Phone
800-810-0268
Fax
949-404-4664
Email
tvonsydow@Corsgroup.com
Thomas comes to Cornerstone with over 36 years in the healthcare industry.
Chief Financial Officer
Nick N. Khalili
Phone
800-810-0268
Fax
949-404-4664
Email
nkhalili@Corsgroup.com
Nick Khalili earned his Bachelors of Science degree in Business Administration with a
Vice President of Field Operation
Judy Forsythe
Phone
800-810-0268
Fax
949-404-4664
Email
jforsythe@cdsdental.com
Judy’s career in the dental industry has spanned over 30 years. After
Vice President of Technology and Innovation
Dr. Max Foroughi
Phone
800-810-0268
Fax
949-404-4664
Email
fforoughi@corsgroup.com
Dr. Foroughi has a PhD in Biomedical engineering (Dental Materials). Highly qualified
Vice President of Training and Education
Dr. Muaz Zendaki
Phone
800-810-0268
Fax
949-404-4664
Email
mzendaki@ctidental.org
Clinical
All Members
Associate Owner
Executive Team
Endodontists
Dentists
Support Staff
Owner
Non-Executive Chairman of the Board
Dr. Ahmad Alnatour
Email
aalnatour@cdsdental.com
Phone
877-237-6363
Fax
949-404-4664
DDSUniversity of the Pacific; San Francisco, CAMMScMedical Sciences; Harvard School of Dental
Sr. Partner
Dr. Ramin Khalili
Email
rkhalili@cdsdental.com
Phone
877-237-6363
Fax
949-404-4664
DDSUniversity of California Los Angeles, Los Angeles, CACertificate in EndodonticsNew York University,
Sr. Partner
Dr. Samyeh Vahabi
Email
svahabi@cdsdental.com
Phone
877-237-6363
Fax
949-404-4664
DDSHerman Ostrow School of Dentistry of the University of Southern California; Los
Sr. Partner
Dr. Brett Strong
Email
bstrong@cdsdental.com
Phone
877-237-6363
Fax
949-404-4664
DDSState University of New York at Buffalo School of Dental Medicine; Buffalo,
Sr. Partner
Dr. Moji Bagheri
Email
mbagheri@cdsdental.com
Phone
877-237-6363
Fax
949-404-4664
DMDBoston University Goldman School of Dental Medicine; Boston, MABABiology, California State University,
Associate Owner
Dr. Ryan Wilson
Phone
877-237-6363
Fax
949-404-4664
Associate Owner
Dr. Rakan Alzwaideh
Phone
877-237-6363
Fax
949-404-4664
Associate Owner
Dr. Michelle Yang
Phone
877-237-6363
Fax
949-404-4664
Associate Owner
Dr. Ronak Makadia
Phone
877-237-6363
Fax
949-404-4664
Associate Owner
Dr. Horst Dziura
Phone
877-237-6363
Fax
949-404-4664
Endodontist
Dr. Christopher B. Olson
ResidencyUniversity of Southern California Endodontic Residency
Dental School
University of Southern California (Herman Ostrow School of Dentistry)
Volunteer Experience
Give Kids A Smile, Flying Samaritans to Mexico, Dental Outreach to Guatemala, AYUDA Clinic Mexico
Biography
Dr. Olson is married with 3 young boys. He is
Endodontist
Dr. Craig C. Deagle
ResidencyGPR, University of Virginia; Charlottesville, VAMMScOral Biology, Harvard School of Dental Medicine;
Endodontist
Dr. David Hwang
DDSHerman Ostrow School of Dentistry of the University of Southern CaliforniaLos Angeles,
Endodontist
Dr. Dina Adami
Endodontist
Dr. Farnoosh Abbasi
CredentialsDDS, MS, Rutgers Dental School; Newark, New Jersey
Dental SchoolUniversity of Colorado; Aurora,
Endodontist
Dr. James Dayley
DMDUniversity of Pennsylvania School of Dental Medicine; Philadelphia, PABSUniversity of California, Santa
Endodontist
Dr. Kelvin Chou
Kelvin Chou, DDS
Endodontic ResidencyNaval Postgraduate Dental School
Dental SchoolUniversity of Illinois at Chicago
Endodontist
Dr. Laura Steff
Endodontist
Dr. Leeann Chu
Endodontist
Dr. Reza Hamedy
DDSUniversity of California, Los Angeles School of Dentistry; Los Angeles, CADDSShahid Beheshti
Endodontist
Dr. Saeed Bayat Movahed
ResidencyUniversity of Texas Health Science Center, San Antonio
Dental School
University of California (Los Angeles, CA)
Volunteer Experience
Give Kids A Smile
Biography
Dr. Bayat enjoys
Endodontist
Dr. Victoria Tountas
DDSAthens School of Dentistry, National and Kapodistrian University; Athens, GreeceMSEndodontics, College of
Endodontist
Dr. Jeff Phan
Endodontist
Dr. Tejpaul Johi
Endodontist
Dr. Paul Guevara
Endodontist
Dr. Long Nguyen
Endodontist
Dr. Brad Radlosky
Dentist
Dr. Albert Barsagian
Dentist
Dr. Johnny Shammo
Dentist
Dr. Maziar Eshraghi
Dentist
Dr. Kamran Salehpour
Dentist
Dr. Duc Nguyen
Dentist
Dr. Vadim Lebovich
Endodontist
Dr. Alexa Aitken
Endodontist
Dr. John Kwon
Endodontist
Dr. Saba Saremi
Endodontist
Dr. Sai Patadia
Endodontist
Dr. Christian Lepure
Administrative
All Members
Associate Owner
Executive Team
Endodontists
Dentists
Support Staff
Owner
Controller
Chris Pun
Email
cpun@corsgroup.com
Phone
800-810-0268
Fax
949-404-4664
Operations Manager
Anna Graboff
Email
Agraboff@cdsdental.com
Phone
800-810-0268
Fax
949-404-4664
Anna Graboff has a BFA from the Academy of Art University, and
National Endodontic Advocate
Christina Zovanyi
Email
czovanyi@cdsdental.com
Phone
800-810-0268
Fax
949-404-4664
Christina has been a Registered Dental Assistant for over 25 years. Her
Schedule Coordinator
Jennipher Tobar
Email
jtobar@cdsdental.com
Phone
800-810-0268
Fax
949-404-4664
Jennipher Tobar has been the Scheduling Coordinator at Cornerstone Dental Specialties since 2014.
Logistic and Shipping
Guy Bogard
Email
gbogard@cdsdental.com
Phone
800-810-0268
Fax
949-404-4664
Vice President
Eiman Abedi
Phone
800-810-0268
Fax
949-404-4664
What our partners say
"Cornerstone allows me the flexible lifestyle I was looking for, while giving me the opportunity to earn a very comfortable income."
Dr. Samyeh Vahabi D.D.S University of Southern California Member of American Association of Endodontists 
"I have been practicing with Cornerstone for over 10 years. While many of my friends have struggled in private practice, my lifestyle only improves year over year. I get to work with fantastic endodontists and team members, and I have a long term exit plan that will take care of my family. Peer support, operations support, and training all add to the experience."
Dr. Ramin KhaliliD.D.S New York University, Member of American Association of Endodontists 
"I researched many career choices after my graduation. I had accumulated a large student debt load and needed to start my practice quickly. I joined Cornerstone over 8 years ago and could not be happier. I am constantly challenged clinically and have the support to focus on my profession. The peer to peer support is incredible and as the Managing Partner l am allowed to expand my leadership skills as well."
Dr. Ahmad Alnatour D.D.S Harvard University Diplomate, American Board of Endodontics Member of American Association of Endodontists 
"Upon graduation I had many opportunities to choose from, I picked Cornerstone so that I could focus on obtaining my Diplomate status and retire my student debt. Now that I have accomplished that I decided to stay as I really enjoy the flexibility and the ability to gain partnership and have a long term growth strategy"
Dr. Moji Bagheri D.M.D. Rutgers University, Diplomate, American Board of Endodontics Member American Association of Endodontists 
"Having spent years in my own private practice, I missed the ability to Mentor and help younger clinicians. Selling my practice and joining Cornerstone has afforded me the opportunity to be part of something larger and help my fellow Endodontists reach their full potential, while learning from them as well."
Dr. Brett Strong D.D.S University at Buffalo School of Dental Medicine Member of American Association of Endodontists 