Welcome to Mountain Lakes Dental Associates, PA, Your Dentist in Denville, NJ

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Smile! You’re in good hands.

At Mountain Lakes Dental Associates, we strive to serve our communities with the latest in dental technology for optimal treatment results, less invasive procedures, and more patient comfort. We operate with integrity, honesty and we care for the well being of our patients and our staff.

Our practice is the proud recipient of several recognitions:

Morris/Sussex County Top Dentists – 2018, 2019

America’s Best Dentists – 2004-2020

We now offer convenient 20-minute, sensitivity free whitening procedures. New patients are welcome.

We look forward to your visit!

Meet Our Staff

Learn Who We Are

  • Dr. Peter K. Eng

    Dr. Peter Eng received his degree in Doctor of Dental Medicine (DMD) in 1988 from the Boston University School of Dental Medicine.  He finished in the top 5% of his class and went on to complete a residency in Advanced Education in General Dentistry (AEGD) in 1989 and earned his Certificate of Advanced Graduate Studies (CAGS). During his spare time, Dr. Eng enjoys a great movie or taking a mini-vacation. His favorite spot is Boston, MA where he gets to catch up with his children. Dr. Eng is also a car enthusiast and loves watching car restoration shows. 

  • Pilar A. Celis

    I’m proud to work in an office that provides high quality dentistry. My favorite part of my job is to make patients comfortable during treatment and make sure they leave with a smile. I earned my degree from NYU in May 2012. I have prepared myself to become a RDH because I want to educate patients about the importance of proper oral hygiene and prevention of oral diseases. I have been a dental hygienist at MLDA since July 2012.

  • Erik Celis

    Behind every telephone call is a patient or family member with a different need, and behind every need, there is an opportunity to bring on a smile...this is the motto that I stand by. Since graduating from Montclair State University, I have over 7 years of experience in healthcare customer service, and I have been a team member of this practice since 2018, greeting our patients as they come through our front door.

  • Elizabeth Feliz

    I have been a dental assistant since 2007, and my job is to prepare and explain the procedures to our patients and facilitate the doctor’s work to make each visit comfortable and enjoyable for our patients. One of the things that fills me with satisfaction is when a patient comes to us discouraged by a dental situation, or pain and discomfort with their dental appearance, and we are able to find a solution and transform their smile.

  • Luz Mosquera

    I been working in the dental field since 2012, and I am currently the Office Coordinator at MLDA.  I love using my vast knowledge of dentistry and dental insurance to help our patients navigate through the process. I am always ready and willing to help and proud to be considered an invaluable asset to our office. 

    I appreciate the caring, compassion, and professionalism shown by Dr. Peter Eng and his entire staff. He takes the time to fully explain options and addresses any concerns/questions I have. He truly values and respects his patients.

    Lola E.

Hours of Operation

Our Regular Schedule

Primary Location


10:00 am-5:00 pm


10:00 am-8:00 pm


10:00 am-8:00 pm


10:00 am-4:00 pm







Our Location

Find us on the map

We Are Open with the Most Up-To-Date Infection Control Measures 

Mountain Lakes Dental remains committed to serving our community while keeping our patients and staff safe. The following is what you can expect during your visit. 

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