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Dr. Ben with 4M Dental Implant Center Patient

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Dr. Sean Headshot

Through lectures and seminars, Dr. Sean has been educating fellow dentists and patients about the life changing benefits of All-on-4®.

Recognizing the importance of this procedure, Dr. Sean opened the 4M Institute in Long Beach, where dentists worldwide come to learn the All-on-4® procedure from him.

Dr. Sean is IV sedation certified. 


  • B.S. in chemistry from UCI, 1992
  • D.D.S. from USC, 1996
  • Progressive orthodontics continuing education, 1998-2000
  • Las Vegas Institute for Advanced Dental Studies (LVI) graduate, 2001-2004
  • California Implant Institute, 2004-2005
  • Loma Linda Implant Speciality, 2005-2006
  • UCLA I.V. Sedation, 2007

Sean Mohtashami, DDS

An authority on the All-on-4® Dental Implant Treatment Solution and an expert in cosmetic dentistry, Dr. Sean knows how to design a beautiful, personalized smile. 

“The road to excellence is endless.” This is the motto which has inspired Dr. Sean throughout his entire dental career.

In 1998, Dr. Sean opened his first general practice in Las Vegas, Nevada – All Bright Dental. Successful, skilled, and now with several years of experience under his belt, Dr. Sean knew he wanted to do more than just general dentistry. Enrolling in continuing education courses, he studied the art and science of cosmetic, reconstructive, and implant dentistry. 

It was then that Dr. Sean became among the first in the Las Vegas valley to offer the All-on-4® dental implant treatment of placing a full arch of teeth on only four implants.

“Many people take their smiles for granted. Your smile, or lack of, says so much about you. Inner beauty, true happiness, a fantastic personality, and full confidence is what we change when we redo someone’s smile.”

Dr. Sean is not only a perfectionist, but truly an artist, and raises smile design to a higher level by taking into account facial features, skin tone, eye color, and more. Dr. Sean has the education and training not just to place implants, but for restoration as well. All this coupled with a cosmetic background equals an aesthetically pleasing and functional outcome for you. Having trained in all aspects of dentistry, Dr. Sean gives you all your options, so that you can make an informed decision.

As Dr. Sean’s name and reputation grew as a dental implant expert, he traveled around Southern California placing implants as an associate for other dentists. It was only a matter of time before he opened his own dental implant practices there. 4M Dental Implant Center was opened in Newport Beach, with 4M Dental Implant Center Long Beach opening soon thereafter. Both practices handle all aspects of dentistry with a focus on the life changing All-on-4® Dental Implant Treatment Solution.

Dr. Sean was recently featured on the show The Doctors. 

Awards and Honors

Advanced Posterior Aesthetic • Practical Occlusion for the Progressive Practice • Advanced Functional Aesthetic Dentistry • Neuromuscular • Comprehensive Aesthetics Reconstruction • Coronoplasty and Case Finishes

Dr. Ben 4M Dental Implant Center

Dr. Ben is the lead educator at 4M Institute, a post-graduate school,  where dentists worldwide come to learn the All-on-4® Dental Implant Treatment Solution.

Academic Tenure

Clinical Assistant Professor
University of Florida
Department of Prosthodontics, 2000-2004

Courtesy Faculty
University of Florida
Graduate Prosthodontics, 2004-2005

Ben Javid, DDS

Dr. Ben Javid is an accomplished Prosthodontist and Lead Educator at 4M Institute, who has completed over 2500 full-arch restorations to date. He has also published research in the area of full-arch treatment.

His work has been featured on the the television program, “The Doctors”, and on an upcoming show that is in development.

He lectures both nationally and internationally and holds several state licenses as well as the Commonwealth of the Bahamas.

Dr. Ben’s passion for his work and his explanatory style contribute to his ability to both lecture and mentor fellow dentists, and to educate his patients.

Dr. Ben is one of the few Prosthodontists in California that specialize in the All-on-4® Dental Implant Treatment Solution. Dr. Javid is a proud member of these prestigious dental organizations:

  • American College of Prosthodontists
  • American Dental Association
  • Academy of Osseointegration


  • B.A. in Biology from University of Missouri, 1997
  • D.D.S. from University of Missouri, 1997
  • Prosthodontics Certification, University of Florida, 2000
Dr. Athena 4M Dental Implant Center


Journal of Prosthetic Dentistry, 2018, Co-Author, Loss of Tooth Structure Associated with Preparation for CAD-CAM Full Coverage Restorations

Athena Goodarzi, DDS

Dr. Athena Goodarzi graduated from one of America’s top 10 dental schools. While working alongside Dr. Mohtashami and Dr. Javid to learn the art and science of the All-on-4® implant solution, Dr. Athena performs procedures such as porcelain veneers, implant restorations, root canal therapy, simple and surgical extractions, bone grafting, and Invisalign.

As a responsible, scientific, and compassionate individual sensitive to her patients’ needs, Dr. Athena is committed to providing safe, high quality, comfortable dental care. She takes pride in getting to know her patients and developing personalized care to enhance aesthetic results and correct functional deficiencies.

Dr. Athena welcomes every opportunity to serve those in need and has volunteered for numerous charitable dental mission trips throughout the U.S. and abroad. She enjoys traveling to different destinations and learning about different cultures while dedicating her passion and knowledge of dentistry to caring for underserved communities.


  • M.S. in Biology from California State University, Fresno, 2012
  • D.D.S. University at Buffalo, School of Dental Medicine, 2017

Post- Doctoral Training:

  • General Practice Residency: NYC Health and Hospitals- Columbia University, 2018
  • Invisalign Certified
  • All-on-4® Course, 4M Institute, Long Beach, 2019

Academic Tenure

Teaching Associate
California State University, Fresno
Department of Biology, 2010-2012

Teaching Assistant
University at Buffalo, School of Dental Medicine
Department of Prosthodontics, 2016-2017

Dr. Samira

Samira Houshiar, DDS

Dr. Samira comes from a long line of health care professionals. Her passion for helping others along with her love of the sciences shines through in her work.

“The road to quality has no finish line.” These are the words that drive Dr. Samira to continually push herself and why she has become one of Orange County’s top dentists.

Advancing her own education as well as educating her patients take top priority in Dr. Samira’s work life. “Knowledge brings with it the 3 C’s: Clarity, Comfort, and Confidence!”

There’s an artistry to Dr. Samira’s work and a chair side manner that patients love, which helped her Irvine practice to grow exponentially in the three years she owned it.  As a proud mother of three beautiful daughters, Dr. Samira sold her practice in 2008 in order to maintain a balance between her two passions: her family and her career.


  • B.S. in Biology from, UCI
  • D.D.S. from UCLA, 2001
  • Sub-specialty in Cosmetic Dentistry from LVI
  • Assistant Fellowship in Implantology
  • Opened dental practice in Irvine California, 2005
  • All-on-4® Course, 4M Institute, Long Beach, 2019