This is not done, but I got a first draft! Posting already for feedback. I'd like to expand almost every section, and if anybody has any tips to recommend from their own recovery, let me know! I plan on adding a section on the importance of regular professional care with a dentist, just haven't yet. 
Dental care in eating disorder recovery
By Traci (Coffee.)
Dental repercussions are one of the most easily noticeable longterm side effects of an eating disorder. Particularly with eating disorders with purging, or self-induced vomiting, just months of engaging in the behavior can cause damage to one's teeth due to the repeat exposure to acid. Acid may also cause sores in the mouth and harm the gums. Restricting type eating disorders also harm teeth due to malnutrition making tooth regrowth slower. While in recovery for an eating disorder, it's important that one continues to take care of their teeth and keeps up with general maintenance and takes step to heal and prevent damage. This guide aims to help outline some particular tips when taking care of one's teeth, particularly within eating disorder recovery.
Products for sensitive mouths
For many with purge-type eating disorders, teeth become sensitive with the longterm exposure to acid. Symptoms of sensitive teeth include pain when exposed to hot, cold, or sugary foods. This may be temporary and stop after the behaviors end, but also may continue to affect a person throughout their life. Fortunately, there are many products that are designed for those with sensitive teeth! Toothpastes such as Sensodyne contain ingredients that numb nerves that cause teeth to hurt while eating and help rebuild calcium and other minerals. However, it's important to use the non-whitening varieties, as whitening toothpastes strip enamel including brands for sensitive teeth. Other products that are good for mouths with damage related to eating disorders are non-alcohol fluoride mouthwash, as this avoids irritating any sores in a person's mouth. Woven floss, as opposed to waxed floss, and soft brush toothbrushes are also recommended as they are less likely to make sensitive gums bleed. Using products that reduce sensitivity and are less likely to cause pain can make dental care a bit less painful!
Nutrition is important
Eat good diet affects the teeth just as it affects the diet. In order to be healthy and strong, teeth a diet rich in macronutrients (protein, carbohydrates, and fat) along with many crucial micronutrients, such as Omega-3 fats, calcium, zinc, and folate. Unfortunately, many disordered eating behaviors may put a person at risk for being deficient in one or more nutrient. If you're having trouble keeping yourself fed, consider consider a supplement for to make up for any nutritional needs. This can help both your body be healthy, but also help your teeth rebuild enamel.
Avoid sugary and acidic food
Dental professionals recommend that everybody avoids sugary and acidic beverages and food. However, due to the harm from purging and malnutrition, foods high in sugar and acid might be especially painful or harmful for the teeth of a person with an eating disorder. This can be a double-edge sword, as while somebody is trying to cope with eating and address fear foods, considering the damage to teeth can be overwhelming. What's important is that a person talks to their doctor and makes a meal plan that addresses all of their nutritional needs, prevents tooth decay, and helps a person learn to indulge responsibly.
Care after relapse
If you purge, first remember that it's okay to make mistakes. Relapse is common in recovery, and it's important not to beat yourself up over it. Then, while it may be tempting to brush your teeth or chew gum, this is actually not recommended immediately following a purging episode. Both of these activities can grind acid into your teeth. Instead, rinse your mouth out with water or preferably a mouthwash to get acid out of mouth, and then consider brushing or chewing gum afterwards if this is something that will help you freshen your breath.
If you're coping with any mental illness, it's very easy to fall into a spiral of, "What's the point?" You may feel discouraged to care for your teeth, especially if you have damage from an eating disorder or are still dealing with eating disorder symptoms. However, dental care affects many aspects of health, and recovery is a holistic process. It's important to take care of yourself emotionally and physically, and small steps can go a long way.