TY  - GEN
AU  - Sussman,H I
TI  - Times change
SN  - 0028-7571
PY  - 1997///0408
KW  - Alveolar Ridge Augmentation
KW  - Alveoloplasty
KW  - Guided Tissue Regeneration, Periodontal
KW  - Humans
KW  - Periodontal Diseases
KW  - prevention & control
N1  - Publication Type: Comment; Letter
ER  -