An adjustable protective mouth assembly and method for protecting the surroundings adjacent to the oral cavity of a patient is provided. The adjustable protective mouth assembly includes a channeled body comprising first and second legs spaced and integrally coupled by a connecting portion. The channeled body is for inserting into the oral cavity of a patient during use. The channeled body further comprises first and second ends, such that the channeled body of the first end is constructed to be received and nest within the channeled body of the second end, forming a connection therebetween.
