Meet Our Faculty

Dr. Sean Mohtashami

The Founder, Innovator, and Leading Expert in Dental Implant Solutions.

Dr. Sean is the visionary founder of 4M Institute and 4M Dental Implant Centers, as well as the bestselling author of “There Is No Standing Still.” Renowned as both a pioneer and a leading expert in dental implant solutions, Dr. Sean has dedicated his career to transforming smiles and elevating the standard of care in implant dentistry.

As the owner and operator of multiple successful practices, Dr. Sean recognized a crucial gap in advanced dental education. In response, he founded 4M Institute—a premier training institute designed not only to deliver world-class clinical and lab instruction, but also to empower dentists with essential skills in marketing, sales, and leadership.

Backed by extensive hands-on experience, Dr. Sean understands firsthand how transformative post-graduate training can be for a dental practice. The 4M Institute is a state-of-the-art facility featuring the latest technology and top-tier equipment, providing students with access to the most advanced tools available in modern dentistry.

A master in identifying and connecting with potential patients in today’s fast-growing implant market, Dr. Sean excels at teaching dentists how to convert interest into successful high-ticket full arch cases. His strategic, real-world training methods are designed to build confidence and capability in every aspect of practice growth.In addition to hosting comprehensive courses at the Institute, 4M Institute’s World Headquarters also houses one of Dr. Sean’s flagship dental implant practices, seamlessly merging

Education:
B.S. in chemistry from UCI, 1992 DDS 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 Specialty, 2005-2006 UCLA I.V. Sedation, 2007 Lotus Leadership Retreat for Dentists, 2018

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

Honors/ Awards:

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

Dr. Athena Goodarzi

Dr. Athena Goodarzi is a prominent female leader in the field of full arch dentistry and modern dentistry, renowned for her expertise in full mouth rehabilitation and advanced implantology. With a meticulous eye for detail and a passion for transforming lives, she specializes in the All-on-X dental implants solution, seamlessly combining artistry and precision to restore both aesthetics and function for her patients.

Dr. Athena earned her Doctor of Dental Surgery degree from the prestigious University at Buffalo School of Dental Medicine, one of the nation’s leading dental programs. She further refined her expertise through a rigorous residency at the College of Physicians & Surgeons of Columbia University in New York City. Her relentless pursuit of excellence has positioned her as one of the most sought-after clinicians in full arch restoration, particularly in cases involving severe bone loss, zygomatic, and pterygoid implants.

Beyond her clinical practice, Dr. Athena is a dedicated educator and mentor. She serves as The Lead Educator at the 4M Institute, where she collaborates with leading experts, including Dr. Sean Mohtashami, to train dental professionals from around the world in full arch rehabilitation.

Dr. Athena was recently honored to be the first female dentist to teach full arch dental implant solutions at ORCAA, in collaboration with Universidad Francisco Marroquín (UFM) in Guatemala. During this experience, she had the privilege of teaching alongside some of the world’s leading surgeons. Additionally, she is a co-faculty at the Atlantic Implant Institute in Virginia Beach, where she specializes in advanced full arch implantology, empowering dentists nationwide with the expertise and techniques needed to master complex restorative treatments.

Dr. Athena's comprehensive education and expertise in implantology and full mouth rehabilitation have positioned her as a Key Opinion Leader within the Straumann Group, where she actively mentors and educates peers throughout the country.

With her unwavering dedication to excellence, extensive experience in full mouth rehabilitation, and passion for education, Dr. Athena has merged innovation with compassionate care, making her a trusted authority in the field and a true pioneer in modern dental implantology.

Full Arch Presentations

American Dental Institute (ADI) - December 2024
Speaker: Mastering full arch dentistry: stepping out of your comfort zone with small but powerful changes

Neodent Symposium - September 2024
Speaker: Mastering the art and business of full arch practice

American Dental Institute (ADI) - December 2023
Speaker: Optimizing your full arch practice

American College of Prosthodontics (ACP) - October 2023
53rd Annual Session
Speaker: Optimizing your full arch practice

Publication

American Dental Journal of Prosthetic Dentistry (JPD) - September 2018
Loss of Tooth Structure associated with preparation for two monolithic CAD/CAM full coverage restorations.
Sadidzadeh, R. Farsaii, A. Goodarzi, A. Davis, E.

Dr. Samira Houshiar

Dr. Samira Houshiar graduated UCI with honors receiving her bachelor’s degree in Biology in 1997. In 2001 she received her Doctoral in Dental Surgery (DDS) from UCLA school of dentistry and since she has continued her education in many different dental subspecialty programs.

Soon after receiving her DDS, she continued her education in cosmetic dentistry at LVI (Las Vegas Institute) and graduated in 2003. While practicing cosmetic and general dentistry, she completed her certification in Occlusion, Neuromuscular, and TMJ treatment concurrently. In order to bring more comfort for her most anxious patients, Dr. Samira completed the training necessary to be certified in Conscious Sedation (2004) and I.V. Sedation (2020).

Since completing her assistant fellowship in Implantology back in 2009, Dr. Samira has dedicated her career to full mouth reconstruction and designing beautiful and functional smiles for her patients. She is currently practicing at 4M Dental Implant Center at the Newport Beach location. Dr. Samira Houshiar is a firm believer that the road to quality has no finish line. She is dedicated to staying at the cutting edge of technology and all dentistry has to offer. She is determined to change lives one smile at a time.

Dr. Tirakhsh Emadi

Dr. Emadi is a prosthodontist and Implant specialist practicing in Long Beach, Ca. He received his D.D.S. (Doctor of Dental Surgery) degree in 2009 from Tehran Azad University of Dentistry, Tehran, IRAN.

Dr. Emadi practiced general dentistry for several years. He was a prosthodontics preceptor at the University of California, San Francisco before he entered Nova Southeastern University College of Dental Medicine in Ft. Lauderdale, FL where he received his specialty certificate in Prosthodontics as well as Master of Science in Dentistry.

 Dr. Emadi was serving as a Chief Resident during his residency. He was honored with the dental implant surgery award at the end of his residency. Dr. Emadi completed the Maxicourse dental implant education in the American Academy of Implant Dentistry. He also excels in digital dentistry.

Dr. Emadi is a diplomate and board certified by the American Board of Oral Implantology/Implant Dentistry (ABOI/ID). He is very passionate in practicing and teaching on single implants, Overdenture, full mouth dental implant rehabilitation, zygomatic and pterygoid implants, digital workflow as well as doing research. He had more than twenty-five presentations in different dental meetings and published several papers in peer-reviewed journals. His presentation in 70th AAID annual conference received first place award. He also received a second-place award in 29th Academy of Osseointegration Annual Meeting. Dr. Emadi is an active member of American Dental Association (ADA), California Dental Association (CDA), Harbor Dental Society (HDS), American Academy of Implant Dentistry (AAID), Academy of Osseointegration (AO) and he is a member of Academy News Committee, Young Clinician Committee, and E-Poster Committee in AO.

COURSE CERTIFICATES:

• Certified for IV Sedation, BLS, ACLS
• Osseodensification Concept for Implant Surgeries, Versah
• CAD/CAM digital dentistry CEREC OmniCam and BlueCam, 3shape TRIOS, 2017

PUBLICATIONS:

1. Implant Rehabilitation After a Partial Resection of the Mandible Resulting from Submandibular Gland Malignancy-A Case Report. J Oral Implantol. 1 June 2022; 48 (3): 220–225. https://doi.org/10.1563/aaid-joi-D-21-00086.

2. Full Mouth Rehabilitation Using Dental Implants with Immediate Loading in a Systemic Sclerosis Patient; A Case Report. Inside Dentistry. 2021 July; 17(7).

3. Immediate Implant Placement and Provisionalization in the Esthetic Zone Using Flapless Technique. Compendium of Continuing Education in Dentistry. 2021 July/Aug;7(42).

4. Oral rehabilitation of a patient with ankylosing spondylitis and orofacial pain: A case report. Surgery and Rehabilitation. 2017 Sep;1(3) 1-5.

5. Effect of Surface Treatment on Retention of Prefabricated Glass-fiber Posts. Journal of Universal Surgery. 2016 Feb;3(5).

6. The Effects of Two Attachment Types on the Stresses Introduced to the Mandibular Residual Ridge; A 3D Finite Element Analysis. Quintessence International. 2013 Sep;44(8):585-590.

7. Stress Introduced by Two Attachment Types in Four Implant-retained Overdenture; A 3D FEA Study. Research in Dentistry. 2009 Jul;6(2):9-17.

Dr. Vishtasb Broumand

Dr. Vishtasb Broumand, DMD, MD  is a true legend in the field of oral and maxillofacial surgery, a pioneer whose expertise, dedication, and relentless pursuit of excellence have set new standards in patient care.

As a dual-degree surgeon with extensive training in both dentistry and medicine, Dr. Broumand has devoted his career to pushing the boundaries of surgical innovation. He is a distinguished diplomate of the American Board of Oral and Maxillofacial Surgery and a respected educator, having trained countless surgeons in advanced techniques of implantology, full-mouth rehabilitation, and complex facial reconstructive surgery.

His groundbreaking contributions to zygomatic and pterygoid implant placement have revolutionized the way we approach severe bone loss cases, offering life-changing solutions to patients who were once deemed inoperable.

Dr. Broumand’s expertise has not only earned him recognition as a leader in his field but has also made him a sought-after speaker at international conferences, where he shares his knowledge and inspires the next generation of surgeons. Beyond his technical brilliance, he is a compassionate clinician, a mentor, and a relentless innovator dedicated to improving patient outcomes. His legacy in the world of oral and maxillofacial surgery is nothing short of extraordinary.

CREDENTIALS: 

• DMD: University of Florida College of Dentistry (1997)
• MD: University of Miami School of Medicine (2000)
• Postdoctoral residency in Oral and Maxillofacial Surgery + General Surgery, University of Miami/ Jackson Memorial Hospital. (2003)
• Fellowship in Head and Neck Tumor and Reconstructive Surgery, University of Miami (2005)
• Former Assistant Professor of Clinical Surgery, University of Miami
• Adjunct Clinical Assistant Professor, University of Florida Dept Oral and Maxillofacial Surgery.
• Private practice, Oral and Maxillofacial Surgery, Desert Ridge Oral Surgery Institute, Phoenix, AZ
• Medical Director/Clinical Assistant Professor, Oral Maxillofacial Surgery, University of Arizona, Banner University Medical Center and the MD Anderson Cancer Center in Mesa, AZ.