Implant placement in severely atrophic jaws is especially challenging because\nof the poor quality and quantity of the future implant bed. Although various\nbone augmentation procedure like ridge augmentation, sinus lift these procedures\nare possible today but it may lead to surgical morbidity they increase\nthe risks and costs of dental implant treatment as well as the number of necessary\noperations. Also sometimes the patient is not agreeing for such extensive\nsurgical procedures, according to the well-known implantological rules\nfor dental restorations, crestal implants are indicated in situations when an\nadequate vertical bone supply is given but single piece dental implant (basal\nimplants) is a viable treatment option derives support from the basal bone\narea which usually remains free from the infection and less prone to resorption.
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