[Sandwich osteotomy versus interpore implants for maxillary versus mandibular ridge augmentation].

Horse-shoe sandwich osteotomy with interposed cancellous bone for augmentation of highly atrophic maxillas is described. 2-year results were encouraging in terms of denture fit, but long-term results are needed for a definitive assessment. For severely atrophic mandibles the use of porous hydroxyapatite (Interpore 200) is shown to be beneficial and prevents further bone resorption. After complete healing dislocation and loss of ridge height were absent, except in one special case. Subsequent vestibuloplasty for relative augmentation proved to be unnecessary. For a definitive assessment of this clinically successful method long-term results will have to be waited for.