] or psychogenic factors. It was observed that orthodontic treatment with stainless steel appliances did not initiate hypersensitivity reaction [. This is a condition in which a latex-allergic person notices itching and swelling of the mouth after eating certain foods, most commonly banana, melons, avocado, kiwi, and chestnuts. It is important to relieve fear and anxiety, use an aspirating syringe and inject slowly [. Another case was reported in which patient had eczema on the face after placement of titanium implants in the mandible [. It is best for a person with latex allergy to avoid any food that causes oral allergy syndrome symptoms. However, latex is extremely common, so it will be difficult to avoid entirely.
Allergy to materials used in endodontics formaldehyde
It was seen on patch testing that a component of the catalyst paste caused the allergy and on replacement of this component, no allergic reactions were observed [. Patch testing done in a study on 29 patients with oral lichen planus revealed that 10 patients showed an allergic reaction to mercury and on replacing the amalgam with composite or glass ionomer, the lesions resolved [. Blinkhorn and leggate reported a case of angioneurotic edema in a boy due to dental rubber dam.