Contact dental schools in your area to see if they can perform your procedure for free, according to About.com. The procedure may take longer since students are learning and practicing the procedure, but it is overseen by a qualified dentist who makes sure it is done correctly.
Some dentists also operate on an income-based sliding scale payment system, according to Money Crashers. You may have to provide proof of your income and expenses to qualify, but you may be able to find free or low-cost dental care that way. Try contacting your state's dental association or local branches of charities, such as United Way, to find dentists who offer this program.
If paying for dental care is an ongoing problem, consider looking for a part-time job that offers health insurance benefits. Some of these plans include dental benefits, notes Money Crashers. If you have a professional skill, ask your dentist if she is willing to trade services. For example, if you work in marketing, you could design advertisements and help increase business for the dental practice.
Try looking into government resources as well, suggests Money Crashers. The Health Resources and Services Administration maintains a website that can help you find free or low-cost care in your area. Your state or local government may also have programs in place.