Alveolar Ridge Augmentation 1 Dental Implantation, Endosseous 1 Humans 1 Platelet-Rich Plasma 1 Sinus Floor Augmentation 1 Treatment Outcome 1 alveolar ridge augmentation 1 alveolar ridge preservation 1 bone regeneration 1 human 1 implant therapy 1 physiology 1 platelet-rich plasma 1 procedures 1 sinus floor augmentation 1 sinus floor elevation 1 thrombocyte rich plasma tooth implantation 1 treatment outcome 1