Classification of Alveolar Ridge Defect Class I – Horizontal – labiolingual defect with normal ridge height Class II – Vertical – coronolabial defect with normal ridge width Class III – Combination – horizontal and vertical ridge defect

Natural Tooth Versus Implant Characteristics under Load Criterion Tooth Implant Connection Periodontal Ligament Function Ankylosis Impact Force Decreased Increased Mobility Variable Anterior teeth more than posterior teeth None Movement Shock breaker effect of Periodontal Ligament Stress captured at crest Apical Intrude quickly 28 micrometer 10 to 50 micrometer Diameter Large Small Cross Section Not round [...]

Factors when replacing posterior teeth with an Implant Supported Fixed Partial Denture. 1. Posterior placement of implants of adequate lngth may be inhibited by anatomic features such as location of mandibular Canal. 2. If there are natural teeth in the opposite jaw, sufficient space may not be available for the abutments or to provide sufficient [...]