Unless a dentist from Cape May happens to pop in, you're not likely to get a definitive medical/dental answer to your question. You could try showing the regs to your dentist and ask her advice. That kind of thing worked for me once.
The Medical Manual is located here:
http://www.uscg.mil/directives/cim/...000_1D.pdf
Here is the relevant text, from section 3.D.13 of the manual:
a. Diseases of the jaw. Current diseases of the jaws or associated tissues that prevent normal functioning are disqualifying. Those diseases include but are not limited to temporomandibular disorders (524.6) and/or myofascial pain that have not been corrected.
b. Severe malocclusion. Current severe malocclusion (524), which interferes with normal mastication or requires early and protracted treatment, or a relationship between the mandible and maxilla that prevents satisfactory future prosthodontic replacement is disqualifying.
c. Insufficient natural healthy teeth. Current insufficient natural healthy teeth (521) or lack of a serviceable prosthesis that prevents adequate incision and mastication of a normal diet and/or includes complex (multiple fixtures) dental implant systems with associated complications are disqualifying. Individuals undergoing endodontic care are acceptable for entry in the Delayed Entry
Program only if a civilian or military provider provides documentation that active endodontic treatment shall be completed prior to being sworn into active duty.
d. Current orthodontic appliances. Current orthodontic appliances for continued treatment (V53.4) are disqualifying. Retainer appliances
are permissible, provided all active orthodontic treatment has been satisfactorily completed. Individuals undergoing orthodontic care
are acceptable for enlistment in the Delayed Entry Program only if a civilian or military orthodontist provides documentation that active
orthodontic treatment shall be completed prior to being sworn into active duty.