| 摘要 |
PCT No. PCT/FR93/00890 Sec. 371 Date May 15, 1995 Sec. 102(e) Date May 15, 1995 PCT Filed Sep. 15, 1993 PCT Pub. No. WO94/06368 PCT Pub. Date Mar. 31, 1994An expansion device for oral reconstruction formed by a closed pouch made of a film provided at one point with an additional thickness and a protective feature against being perforated right through, characterized in that the protective feature is a concave cover portion within the pouch and is positioned so as to be facing the additional thickness, bonded directly to each side of the additional thickness but not on its entire periphery.
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