牙槽嵴的缺陷可表现在骨骼和/或功能性义齿承托区。骨缺陷除了外伤和癌症术后的变形以外,几乎全部源于萎缩。功能性义齿承托区的缺陷涉及了骨的形态(无论有无再吸收),妨碍修复体固位的肌肉附着以及被覆软组织的类型。在萎缩的下颌,组织的实际结构是至关重要的。全口义齿制作中的两个主要目标是稳定性和固定力。影响义齿稳定性的主要因素是义齿承托区的形态以及可用作支持义齿的表面积。可作为义齿承托区的最大生理性利用以及认真的设计,义齿才能行使功能。当(牙合)不平衡时, Defects in alveolar ridges can manifest in the bones and / or functional denture support areas. In addition to traumatic bone defects and postoperative deformation of cancer, almost all from the atrophy. Defects in the functional denture support area involve the morphology of the bone (with or without reabsorption), the muscle attachment that prevents the retention of the prosthesis, and the type of soft tissue covered. In the atrophic jaw, the actual structure of the tissue is crucial. Two major goals in total denture fabrication are stability and fixation. The main factors influencing the stability of the denture are the shape of the denture bearing area and the surface area that can be used as a supporting denture. Dental care can be used as the largest physiological support area as well as serious design, dentures to exercise the function. When (occlusion) is not balanced,