A disposable, inflatable, matrix (tooth dam) used to form a temporary, removeable side wall for the placement of a tooth filling material. It establishes the original dental anatomy of the tooth, and maintains the correct contact between adjacent teeth for flossing purposes and gingival health. It accomplishes this by inflating a pair of self-sealing air chambers that extend from the back face of a planar panel that they are formed on, such that these chambers contact and press against the adjacent tooth and exert enough force to elastically secure the planar panel without wedges and clamps. It prevents the tooth filling material from leaving the prepared tooth and entering the space between the teeth to enhance flossing and proper dental hygiene. This device will greatly enhance patient comfort, procedural efficiency and consistency.