title: Primary implant stability in augmented sinuslift-sites after completed bone regeneration: a randomized controlled clinical study comparing four subantrally inserted biomaterials.
abstract: Implant-Insertion-Torque-Value (ITV) proved to be a significant clinical parameter to predict long term implant success-rates and to decide upon immediate loading. The study evaluated ITVs, when four different and commonly used biomaterials were used in sinuslift-procedures compared to natural subantral bone in two-stage-implant-procedures. The tHUCSL-INTRALIFT-method was chosen for sinuslifting in 155 sinuslift-sites for its minimal invasive transcrestal approach and scalable augmentation volume. Four different biomaterials were inserted randomly (easy-graft CRYSTAL n = 38, easy-graft CLASSIC n = 41, NanoBone n = 42, BioOss n = 34), 2 ccm in each case. After a mean healing period of 8,92 months uniform tapered screw Q2-implants were inserted and Drill-Torque-Values (DTV) and ITV were recorded and compared to a group of 36 subantral sites without need of sinuslifting. DTV/ITV were processed for statistics by ANOVA-tests. Mean DTV/ITV obtained in Ncm were: Control Group 10,2/22,2, Bio-Oss 12,7/26,2, NanoBone 17,5/33,3, easy-graft CLASSIC 20,3/45,9, easy-graft CRYSTAL 23,8/56,6 Ncm, significance-level of differences throughout p < 0,05. Within the limits of this study the results suggest self-hardening solid-block-like bone-graft-materials to achieve significantly better DTV/ITV than loose granulate biomaterials for its suspected improvement of vascularization and mineralization of the subantral scaffold by full immobilization of the augmentation site towards pressure changes in the human sinus at normal breathing.
authors: Head of Maxillofacial Surgery Dep., Center for Facial Esthetics Vienna, Brauhausgasse 12, 1050 Vienna, Austria.
authors: Angelo
authors: A
authors: Troedhan
authors: Head of Oral Surgery &Implantology Dep., Center for Facial Esthetics Vienna, Brauhausgasse 12, 1050 Vienna, Austria.
authors: Izabela
authors: I
authors: Schlichting
authors: Head of Oral Surgery &Implantology Dep., Implantology Clinic Oberkassel, Dominikanerstrasse 10, 40545 Dusseldorf.
authors: Andreas
authors: A
authors: Kurrek
authors: Head of Oral Surgery &Implantology Dep., Implantology Clinic Kaiserswerth, Kaiserswerther Markt 25, 40489 Dusseldorf.
authors: Marcel
authors: M
authors: Wainwright
mesh_terms: D000328:Adult; D001672:Biocompatible Materials / Q000737:chemistry / Q000494:pharmacology; D001861:Bone Regeneration / Q000187:drug effects*; D002130:Calcium Phosphates / Q000737:chemistry / Q000494:pharmacology*; D015921:Dental Implants; D003781:Denture Retention; D004338:Drug Combinations; D017886:Durapatite / Q000737:chemistry / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000601:surgery; D008443:Maxillary Sinus / Q000601:surgery; D008875:Middle Aged; D008903:Minerals / Q000737:chemistry / Q000494:pharmacology*; D012822:Silicon Dioxide / Q000737:chemistry / Q000494:pharmacology*; D019415:Torque
chemical_list: C077540:Bio-Oss; D001672:Biocompatible Materials; D002130:Calcium Phosphates; D015921:Dental Implants; D004338:Drug Combinations; D008903:Minerals; C534915:NanoBone; C485817:beta-tricalcium phosphate; D012822:Silicon Dioxide; D017886:Durapatite