Functional mouth protectors for contact sports.

for this technic of reconstruction. In two of the seven cases, the patients died with the recurrence of the disease; in two cases exposures of the prosthesis resulted, in one case intraorally, in the other extraorally. In the latter case, the opening was closed successfully; the intraoral ex­ posure still persists. In the three remain­ ing cases, the patients had uneventful recoveries after primary reconstruction. In the successful cases, eight months is the longest interval that has elapsed since the insertion of the prosthesis. The cases are being followed carefully to observe any clinical manifestations of unfavorable tissue reaction. Concurrent with this clinical study, a laboratory research project is being conducted with the use of live animals. The results of this study will be reported on its conclusion. S U M M A R Y