About Us

The Doctors at 4M Dental

With thousands of implants placed, the doctors at 4M Dental Implant Center have successfully taken on some of the most complex cases. Dr. Sean is a leader and educator in the field of dental implants – at the forefront of what’s happening in the industry – and passes his knowledge on to his associates. Through the 4M Institute (located in our Long Beach facility), Dr. Sean teaches the art and science of the All-on-X solution to dentists from around the world. His years of experience and wealth of knowledge enable us to educate our patients on their best options and what to expect.
Love Your Smile Again at 4M Dental Implants!
4M reception backdrop

Meet Our Doctors

Choosing to invest in dental implants is a big decision. There are many dentists who say they specialize in full-arch dental implants. So what makes us any different? Quite a lot, actually.

Sean Mohtashami,

Dr. Sean is a leading authority on full-mouth dental implants and is a world renowned expert in cosmetic dentistry. He truly knows how to design a beautiful and personalized smile.

Upon graduating from the USC School of Dentistry he continued his quest for knowledge and completed many specialty programs in his field. Deeply committed to education, in 2018 Dr. Sean created his own institute for learning in Long Beach, CA, and is currently teaching and mentoring doctors from around the world.

This, combined with over 20 years of practical experience, has made Dr. Mohtashami a Top 100 Implant Surgeon worldwide.

Samira Houshiar, DDS

Since earning her doctoral credentials at the University of California, Los Angeles, Dr. Samira has established herself as an artist in the dental field. Her attention to detail is what sets her apart as a leading cosmetic specialist in Southern California.

Her commitment to studying the newest advances in cosmetic and surgical dentistry places her in a select group of doctors able to address their patients’ most difficult dental concerns.

Dr. Samira practices in her own community of Newport Beach, California. Most rewarding to Dr. Sam is being there for her patients, making sure they receive the smiles they’ve always wanted.

Athena Goodarzi, DDS

Dr. Athena graduated from The University at Buffalo School of Dental Medicine, long considered one of the top dental programs in the nation. She completed her residency at Columbia University New York City. 

Dr. Athena’s expertise is blending art with function, but her attention to detail and gentle approach to dentistry is what stands out. Her ability to connect with her patients, create relationships, and design the best treatment possible makes her the perfect addition to our team. Dr. Athena has profoundly affected the smiles and lives of many of our patients, and would love to do that for you, too.

Philip Konopa, DDS

Dr. Phil received his doctoral degree from the University of Washington and completed his residency at the University of California, Los Angeles (UCLA). 

His skills and experience enable him to excel in full-service general and cosmetic dentistry with an emphasis on comprehensive/reconstructive procedures.

Dr. Konopa is well versed in fixed restorations & aesthetics, and helps our patients achieve a beautiful, functional smile they are proud to show the world.

Derik Alexanians, DDS

Upon graduating from UCLA, Dr. Derik has made Southern California his home and has been practicing dentistry here for over two decades.

His comprehensive knowledge of restorative dentistry techniques such as extractions, bone and tissue grafting, implant surgery & placement through the use of oral and IV sedation, allows him to provide unparalleled care.

Dr. Derik will light up your day with his contagious smile and is one of the best people you’ll ever meet.

Audrey Lakani, DDS

A graduate of UCLA Dental School, Dr. Lakani comes to us from a family of longstanding healthcare professionals. As an avid learner, she has completed several residency programs in cosmetic dentistry, implant restorations, laser, and full arch dentistry.

She believes that everyone deserves a beautiful smile. As a cosmetic dentist, she treats every patient uniquely with a personalized plan of care by using modern techniques combined with the artistic aspect of dentistry to fit every patient’s needs.

We are grateful for Dr. Lakani’s talent and skill, as she is one of the most caring and knowledgeable dentists anywhere!