Before revision: The Tessys method was a further development of the existing YESS method ( USA Anthony Yeung) by the Dutch Thomas Hoogland in 1989 in Munich by reaming a few mm's from the SAP (Superior Articular Process).
After revision: The Tessys method was a further development of the existing YESS method ( American Anthony Yeung) by the Dutch Thomas Hoogland in 1989 in Munich by reaming a few mm's from the SAP (Superior Articular Process).