Leinassar Dental Excellence

Appointments 7am-6pm!

Our Hours

Monday: 8am-6pm
Tuesday: 9am-6pm
Wednesday: 7am-5pm
Thursday: 7am-5pm
Friday: 8am-5pm
Saturday: By Appointment Only

Here at Leinassar Dental Excellence, we are committed to making sure your dental experience is comfortable, personalized & affordable. We are part of a trusted Astoria tradition of clinical excellence, offering state-of-the-art services.

We are conveniently located in the Astoria area & are here for all your dental needs. With a focus on family & cosmetic dentistry, we are happy to help you achieve a beautiful smile in our comfortable, safe & friendly environment. Our team offers a wide array of procedures, including Invisalign® clear orthodontics, dental implants & sedation dentistry.

We look forward to providing you & your family with the dentistry you deserve.


six month smiles

More Information On Six Month Smiles®

Comprehensive Dental Care
in One Convenient Location

At Leinassar Dental Excellence, we have extensive experience in all aspects of modern dentistry. We offer comprehensive dental care, including everything from the preventive education & routine cleanings that help to reduce dental problems to expert solutions for the dental issues our patients face–like orthodontics & restorative dentistry–all in one convenient location.

Your Safety Is Our Top Priority

We maintain the highest standards of sterilization & patient safety, including those of the Centers for Disease Control, in order to best safeguard your health & well-being.

Our Offers

We Will Maximize Your Insurance!

*If you have insurance where a co-pay is not required, your exam, x-rays & cleaning will be at no cost to you. If your insurance requires a co-pay, you must pay a small out-of-pocket cost. If you don’t have dental insurance, please see cash prices above. Offers include all allowable benefits. Cash offers are for new patients only, except as noted. Cash, check or credit card only, or your insurance may cover. Cash offers include: Cleaning offer: cleaning & home-care kit, does not include periodontal (gum) therapy. Exam offer: exam, consultation, x-rays & an oral cancer screening. Children’s offer: exam, cleaning, x-rays & a fluoride treatment. For children up to age 13. Call for more details. The offer configuration as described & shown above is reserved strictly for use by chrisad clients in good standing. Copyright © 2018 chrisad, inc., marin co., ca all rights reserved. Copyright 2018 © Leinassar Dental Excellence

Meet Dr. Leinassar

Dr. Rousseau

Dr. Leinassar is a gentle, caring dentist who uses the most advanced materials & procedures available. He practices comfortable, health-centered dentistry with a strong emphasis on getting to know each of his patients. In addition to his technical proficiency, Dr. Leinassar is a careful listener & will explain beforehand what treatment is best for your individual needs. He has been part of an Astoria tradition of dental comfort & care for over 40 years.

Dr. Leinassar graduated from the Oregon Health Sciences School of Dentistry in 1975 & has dedicated his professional career to providing you with the best that dentistry has to offer. He is continually improving his practice with the latest techniques & products to bring you state-of-the-art, personalized dental care in a sterile, safe environment.

Dr. Leinassar has completed over 2,000 hours of continuing education courses & studied all areas of dentistry, including cosmetic, sedation & implant dentistry. Dr. Leinassar is a member of the Dental Organization for Conscious Sedation, Academy of General Dentistry & the American Academy of Cosmetic Dentistry. In addition to his membership in numerous dental associations, Dr. Leinassar is the only accredited member in the American Academy of Cosmetic Dentistry within 95 miles & is one of only five in the entire state of Oregon.

Dr. Leinassar uses the latest technology in conjunction with the best in personalized care to give you optimal dental health. Whether focusing on preventive care or undertaking restorative work, you’ll be in great hands!

Proud Member of...

General Academy of Cosmetic Dentistry

Contact Us

One Convenient Location for All of Your Dental Needs

We are located at the foot of 14th Street on the waterfront.

Same-Day Appointments!

Address: 1414 Marine Drive, Astoria, OR 97103     Phone: 503-325-0310

Request an Appointment

Convenient Hours Before & After Work or School

At Leinassar Dental Excellence, we provide you with the preventive & restorative care you need without having to take time off from work or school. It’s just another way we show our patients how much we care.
New patient? Save time, complete these forms & bring in to your first appointment!

We always strive to find an appointment at the time that works best for you. Please fill out the form below to let us know when you would like to come in & one of our staff members will contact you as soon as possible to finalize your appointment.