Welcome to Dentistry-by-the-Sea

Get excellent dental care in a family setting

Our approach

We are a group of professionals that will always put our patient’s interests first. We will treat you like family. We love to be educational and interactive, explain any treatments necessary and their alternatives. We want to help our patients to make the best informed decisions about oral healthcare.

At Dentistry-by-the-Sea, you’ll enjoy a comfortable atmosphere with focus on your well being.

Meet our team

Alexandra Gilbert, DMD

Dr. Alexandra Gilbert –was born and raised in western Germany where she received her degree in Dental Medicine from the Dental School of the University of Greifswald in 2002. She was a partner in her dental office in Germany until she married and moved to Massachusetts in 2008. She attended and graduated from the Advanced Standing Program at Boston University Dental School with High Honors and helped teach removable prosthodontics. Dr. Gilbert offers comprehensive dentistry and enjoys serving her community by providing high quality dentistry. Her top priority is the comfort of her patients.
Sophia Martz, DMD

Dr. Sophia Karabatsos Martz- Originally from Athens, Greece. Dr. Martz was raised in Fort Lee, New Jersey. She graduated from Tufts University School of Dental Medicine. Upon graduation she completed a one year General Practice Residency at Nassau County Medical Center in East Meadow, NY. In addition to private practice Dr. Martz has served as an instructor at Tufts University. Dr. Martz is the founder of our beautiful practice. In May 2025 she sold the practice to Dr Gilbert. Dr Martz continues to enjoy serving our patients.

Where to find us:

Our office is conveniently located in Manchester-by-the-Sea, on Route 127. Parking is provided for easy access.

66 Summer Street

Unit 3

Manchester-by-the-Sea, MA 01944

Phone: 978-526-0077

Office Hours:

Monday: 8:00am to 5:00pm

Tuesday: 8:00am to 5:00pm

Wednesday: 8:00am to 5:00pm

Thursday: 8:00am to 5:00pm

Our services

Crowns

We understand how important a healthy, confident smile is. When a tooth becomes damaged, weakened, or worn down, a dental crown can restore its strength, function, and appearance — giving you back your smile with confidence.
What is a Dental Crown?
Composite Restorations

At Dentistry-by-the-Sea, we believe in dental care that’s not only effective but also esthetically pleasing. That’s why we use composite restorations — also known as tooth-colored fillings — to repair cavities and restore your teeth without compromising your smile.
What Are Composite Restorations?
Implants

Missing teeth can affect more than just your smile — they can impact your confidence, your ability to eat and speak comfortably, and even your long-term oral health. We offer dental implants as a permanent, natural-looking solution to restore both function and beauty to your smile.
What Are Dental Implants?
Dentures

We understand that losing teeth can affect much more than your appearance — it can impact how you eat, speak, and feel about yourself. That’s why we offer custom dentures that are designed to restore your smile, improve your quality of life, and help you feel like yourself again.
What Are Dentures?

A dental crown is a custom-made cap that fits over a damaged or decayed tooth. It protects and strengthens the remaining tooth structure while blending naturally with the rest of your smile.
Crowns are often recommended when a tooth is cracked or fractured, severely decayed, worn down from grinding, treated with a root canal or misshapen or discolored.
What to Expect
Getting a crown typically takes two visits. During your first visit, we’ll gently prepare the tooth and take precise impressions. You’ll leave with a temporary crown while your permanent one is custom-crafted in the lab. At your second visit, we’ll ensure the fit is perfect and then bond it securely in place.
We offer crowns made from high-quality materials like porcelain, zirconia, gold, and porcelain-fused-to-metal — chosen to match your natural teeth in color and strength.

Composite restorations are made from a durable, tooth-colored resin that blends seamlessly with your natural teeth. They are used to repair areas of decay, minor cracks, chips, or worn enamel — all while maintaining the natural appearance of your tooth.
Unlike traditional silver (amalgam) fillings, composite materials bond directly to your tooth, providing both strength and a flawless finish.
Benefits of Composite Fillings
Natural Appearance: Blends in with your tooth color for an invisible restoration.
Strong & Durable: Bonds tightly to the tooth structure for added strength.
Preserves More Tooth: Requires less removal of healthy tooth material compared to amalgam.
What to Expect
The process for a composite restoration is quick, comfortable, and usually completed in a single visit. After gently removing the decayed or damaged portion of your tooth, we apply the composite material in layers, sculpt it to match your tooth’s shape, and harden it with a special curing light. We then polish the restoration for a smooth, natural feel.

A dental implant is a small titanium post that acts as an artificial tooth root. It’s surgically placed into the jawbone, where it integrates with the bone over time to create a strong foundation for a crown, bridge, or denture.
Whether you're missing one tooth, several teeth, or all of them, implants can help you regain a full, confident smile.
Why Choose Dental Implants?
Dental implants are considered the gold standard in tooth replacement for a reason:
Permanent & Secure: Implants are designed to last for decades with proper care.
Natural Look & Feel: Custom crowns are made to match your natural teeth.
Preserve Bone Health: Implants stimulate the jawbone and prevent bone loss.
No Impact on Surrounding Teeth: Unlike bridges, implants don’t require altering neighboring teeth.
Improved Speech & Chewing: Eat and speak with confidence — no slipping or discomfort.
What to Expect
The implant process typically takes place over several months, allowing time for healing and proper integration with the jawbone. Here’s a general outline:
Consultation & Planning: Evaluation of your oral health and bone structure using advanced imaging.
Implant Placement: The titanium post is surgically placed in the jawbone.
Healing Period: Over a few months, the implant fuses with the bone (a process called osseointegration).
Restoration: A custom crown, bridge, or denture is attached to complete your new smile.
We work closely with trusted specialists to ensure the highest level of care and precision throughout your treatment.
Are Implants Right for You?
Most healthy adults with sufficient bone structure are good candidates for dental implants. If needed, we may recommend bone grafting or other preparatory treatments to ensure the best possible outcome.

Dentures are removable prosthetic devices used to replace missing teeth and surrounding tissue. They’re custom-made to fit your mouth comfortably and look natural.
We offer several types of dentures to fit your unique needs:
Complete Dentures: For patients missing all teeth in the upper or lower arch.
Partial Dentures: For patients missing several teeth, supported by your remaining natural teeth.
Implant-Supported Dentures: For added stability and a more secure fit.
Whether you’re getting dentures for the first time or replacing an old set, we’re here to make the process smooth and stress-free.
Benefits of Dentures
Restore Function: Eat and speak more comfortably and confidently.
Natural Appearance: Custom-designed to look like your real teeth.
Support Facial Structure: Helps prevent the sunken look that can result from missing teeth.
Removable & Easy to Clean: Designed for everyday convenience and hygiene.
Affordable Solution: An effective option for many patients seeking to replace missing teeth.
What to Expect
Getting dentures is a multi-step process, and we’re with you every step of the way:
Initial Consultation: We’ll assess your oral health and discuss the best denture option for your needs.
Impressions & Fitting: Precise impressions ensure a secure, comfortable fit.
Try-In & Adjustments: You’ll preview how your dentures will look and feel, and we’ll make any necessary adjustments.
Final Placement: Once your dentures are ready, we’ll ensure they fit comfortably and function properly.