www.dental-implants-guide.com The Crest Widener (invented by Dr. Zvi Laster ) is used to widen a narrow alveolar crest which has sufficient height for implantation. With this technique, bone augmentation is avoided, the dental implant is placed in the correct lateral position and sufficient attached gingiva is obtained. In addition, the MIS Crest Widener can be used to allow easy distal or mesial orthodontic movements of the molars.