What Is a Breast Prosthesis? Breast Forms, Types, Materials & Everyday Use Explained
A breast prosthesis is an artificial breast shape worn outside the body to replace the shape of all or part of a breast after breast surgery. It is also commonly called a breast form.
A breast form may be worn inside a bra or other supportive clothing. Some are designed to replace the shape of a whole breast, while smaller partial forms can fill an area where only part of the breast has been removed.
Wearing one is a personal choice. A breast prosthesis is not the same as a surgically placed breast implant, and having a mastectomy does not mean you are required to use a prosthesis.
Breast prosthesis = breast form: an external, removable breast-shaped form used to replace all or part of the shape of a breast.
Breast Form Vocabulary Card
Several similar terms appear in post-mastectomy information. Understanding the difference makes it easier to compare options without confusing an external breast form with reconstructive surgery.
Is a breast form the same as a breast prosthesis?
Yes, in everyday post-mastectomy use, “breast form” and “breast prosthesis” usually describe the same external wearable device.
“Prosthesis” is the more clinical term. “Breast form” is often used in fitting, lingerie and everyday conversation because it describes the object's purpose more intuitively.
The important distinction is between a breast form and a breast implant. A breast form is removable and stays outside the body. An implant is used as part of breast reconstruction and is placed surgically inside the body.
If you want to understand how an external form is positioned with clothing, see how to wear a breast prosthesis .
What is the difference between a full and partial breast prosthesis?
Breast prostheses are not all designed to replace the same amount of breast shape.
Full breast prosthesis
A full form is intended to replace the shape of the whole breast, most commonly after a mastectomy.
Full forms come in different shapes, profiles, sizes and weights so the wearer can choose a result that works with their body and clothing.
Partial breast prosthesis
A partial form replaces or adds shape only where it is needed. It may be used after breast-conserving surgery or when one area needs additional volume for balance.
You may also hear partial forms described as shapers, shells or equalizers depending on the manufacturer and design.
For a deeper comparison of shapes and styles, read the different types of breast prosthesis .
What are breast prostheses made from?
There is no single material used for every breast form. The right material depends on when the form is being used, how much weight the wearer prefers and what feels comfortable.
What is a temporary breast prosthesis?
After breast surgery, some people are offered a lightweight temporary form while the surgical area heals and swelling changes. These are often soft fabric forms rather than heavier silicone prostheses.
Their purpose is not to determine your permanent choice. They simply offer a lightweight option during a period when the body may still be changing.
What does “permanent breast prosthesis” mean?
This phrase can sound confusing because the form itself is still removable.
In breast-care information, a “permanent prosthesis” usually means a longer-term external breast form fitted after the surgical area has healed sufficiently, rather than a form that is permanently attached to the body.
- Temporary form Lightweight and generally used during the earlier healing period if wanted.
- Longer-term breast form Chosen later if the wearer wants one, often after swelling has settled and fitting is more stable.
How is a breast prosthesis worn?
Many breast forms are worn inside a bra cup or inside the internal pocket of a pocketed mastectomy bra. A well-fitting regular bra may also work for some forms.
Other designs may attach differently, so the manufacturer's instructions and your prosthesis fitter's guidance matter.
The goal is not simply to “fill a cup”. A form should work comfortably with your clothing and remain reasonably stable during everyday movement.
If you are comparing bra and breast-form fit together, see our post-mastectomy fitting guide .
Is a breast prosthesis required after a mastectomy?
No. Wearing a breast prosthesis is optional.
Some people enjoy wearing a form because they want a particular shape under clothing. Others use one only with certain outfits. Some plan to have reconstruction later and use a breast form temporarily. Others prefer not to wear one at all.
A breast prosthesis is a choice, not a requirement for recovery.
There is no universal rule that says your body needs to look a particular way after breast surgery. Your decision can be based on comfort, clothing, lifestyle and personal preference—and it can change over time.
If you are beginning to compare shapes, weights and materials, continue with how to choose a breast prosthesis .
Compare available breast-form options by shape, material and everyday wearing preferences when you are ready.
Explore Breast Form OptionsFAQ: What is a breast prosthesis?
What is a breast prosthesis in simple terms?
A breast prosthesis is an artificial external breast shape that replaces the shape of all or part of a breast after surgery. It can be worn with a bra or other supportive clothing.
Is a breast form the same as a breast prosthesis?
Yes. In this context, “breast form” is the common everyday term for an external breast prosthesis. Both usually refer to a removable form worn outside the body.
Is a breast prosthesis the same as a breast implant?
No. A breast prosthesis is worn outside the body and can be removed. A breast implant is surgically placed inside the body as part of breast reconstruction.
Are all breast prostheses made of silicone?
No. Silicone is common for longer-term breast forms, but lighter foam and fabric-based forms are also available. Temporary post-surgery forms are often lightweight and fabric covered.
What is a partial breast prosthesis?
A partial prosthesis replaces or adds shape only to part of the breast rather than recreating the outline of the whole breast. It may be useful after breast-conserving surgery or where additional volume is wanted.
Do I have to wear a breast prosthesis after mastectomy?
No. Some people wear a breast form every day, some use one occasionally and others choose not to wear one. It is a personal choice rather than a requirement of recovery.
