Several mechanical complications have been reported in the dental
literature. When proper design guidelines are followed, many of these
complications can be minimized or avoided. This presentation identifies
the most common mechanical complications and presents guidelines that help
prevent adverse leverage on implants. Additionally, when implant placement
cannot be ideal or the implants are not appropriately positioned, this
presentation describes methods that can be used to resist adverse leverage with
both implant single crowns and implant fixed partial dentures.