Worth trying?

Acupressure - Using ancient arts to control pain.
Affirmations - Taking back control of your life.
Hypnosis - Using a reputable therapist could help you control your fears. Now available Relax and Don't be afraid of the dentist. The helpful suggestions and a relaxation technique that you can actually use in the chair will help you stay calm and in control.
Rescue Remedy - One of the Bach Flower Remedies that can help at stressful times.
Biorhythms - Choose the best time for that appointment.

Worth reading

Check out this useful article on anxiety at Beyond the Rainbow 
Peace of Body Peace of Mind - An excellent book that holds the key to regaining control of your life.
Reinforcements - Bits of Wisdom for achieving Peace, Balance and Harmony. The perfect companion to Peace of Body Peace of Mind.
Even if  you think you can't .....You can and Simple steps to freedom from fear. are articles written especially for Beyond Fear explaining how  controlling your thoughts can make a difference.
I am safe - I can breathe
Feeling as though you’re "Unable to Breathe" is a common anxiety symptom, whether you’re phobia is related to being at the dentist, driving, or being enclosed in a small place like an elevator. And the feeling has one source and one source only… fear thoughts.
It is something that you CAN control. Rose VanSickle explains a method that anyone can use to overcome a very distressing symptom.

Non chew cookbook - A cookbook for people with mouth disorders.

Working with your dentist -  Knowledge is power. This family dental reference book explains, in easy to understand words, many aspects of dentistry.

Dental Emergency and You're All Alone - What to do when a dental emergency strikes
Finding The Answers in managing your fears and anxieties   - Stanley Popovich endured his share of fear and anxiety over the years. Unable to find the help he needed, the author decided to undertake his own research. The result is "A Layman's Guide to Managing Fear Using Psychology, Christianity and Non Resistant Methods" - an easy to read book based on a combination of research and personal experience.  

Worth thinking about

The body's reaction to danger - Understanding why our body feels the way it does when we start to panic can be the first step in controlling the reactions.
Sedation techniques - Talk to your dentist about the options available to you.
Avoiding your fears making matters worse.