OBJECTIVES: The aim of the present randomized clinical study was to evaluate histologically whether the addition of cultivated, autogenous bone cells to a composite graft of deproteinized bovine bone mineral (DBBM) and autogenous bone (AB) for sinus floor augmentation (SFA) enhance bone formation compared with what achieved after SFA with DBBM + AB alone. MATERIAL AND METHODS:Twenty patients with remaining posterior maxillary alveolar crest height of less than 3 mm receivedSFA after randomization either with an DBBM and AB composite in a 1 : 1 ratio or with DBBM + AB supplemented with autogenous bone cells, which were cultivated from a bone biopsy harvested earlier from the tuberosity area. Four months after SFA, two cylindrical biopsies were taken from the augmented sinuses concomitantly with the implant site preparation by means of a trephine bur. An additional biopsy was taken from the tuberosity area. Bone density at the augmented sinus and the tuberosity area and the height of augmentation were estimated on non-decalcified histological sections prepared from the biopsies. A relative bone density index (RBD) was also calculated by dividing bone density at the augmented sinus with bone density at the tuberosity area. RESULTS: All patients but one could receive two implants after SFA; in one patient, only one implant could be placed. All implants were osseointegrated and could be loaded. Median bone density in the sinus was 30% and 25% in the cell seeded and no-cells added DBBM + AB groups, respectively. Bone augmentation height averaged 6.0 and 5.4 mm and RBD averaged 0.48 and 0.73 in the cell seeded and no-cells added DBBM + AB groups, respectively. None of the differences between groups was statistically significant. CONCLUSIONS:Cultivated autogenous bone cell seeded to a DBBM + AB composite did not significantly improve bone formation (density and height) after SFA, compared with what was achieved with DBBM + AB alone. Both approaches resulted into enough bone to support implant placement and osseointegration.
RCT Entities:
OBJECTIVES: The aim of the present randomized clinical study was to evaluate histologically whether the addition of cultivated, autogenous bone cells to a composite graft of deproteinized bovine bone mineral (DBBM) and autogenous bone (AB) for sinus floor augmentation (SFA) enhance bone formation compared with what achieved after SFA with DBBM + AB alone. MATERIAL AND METHODS: Twenty patients with remaining posterior maxillary alveolar crest height of less than 3 mm received SFA after randomization either with an DBBM and AB composite in a 1 : 1 ratio or with DBBM + AB supplemented with autogenous bone cells, which were cultivated from a bone biopsy harvested earlier from the tuberosity area. Four months after SFA, two cylindrical biopsies were taken from the augmented sinuses concomitantly with the implant site preparation by means of a trephine bur. An additional biopsy was taken from the tuberosity area. Bone density at the augmented sinus and the tuberosity area and the height of augmentation were estimated on non-decalcified histological sections prepared from the biopsies. A relative bone density index (RBD) was also calculated by dividing bone density at the augmented sinus with bone density at the tuberosity area. RESULTS: All patients but one could receive two implants after SFA; in one patient, only one implant could be placed. All implants were osseointegrated and could be loaded. Median bone density in the sinus was 30% and 25% in the cell seeded and no-cells added DBBM + AB groups, respectively. Bone augmentation height averaged 6.0 and 5.4 mm and RBD averaged 0.48 and 0.73 in the cell seeded and no-cells added DBBM + AB groups, respectively. None of the differences between groups was statistically significant. CONCLUSIONS: Cultivated autogenous bone cell seeded to a DBBM + AB composite did not significantly improve bone formation (density and height) after SFA, compared with what was achieved with DBBM + AB alone. Both approaches resulted into enough bone to support implant placement and osseointegration.
Authors: Paula Korn; Tilman Ahlfeld; Franziska Lahmeyer; David Kilian; Philipp Sembdner; Ralph Stelzer; Winnie Pradel; Adrian Franke; Martina Rauner; Ursula Range; Bernd Stadlinger; Anja Lode; Günter Lauer; Michael Gelinsky Journal: Front Bioeng Biotechnol Date: 2020-03-25
Authors: Vivian Wu; Marco N Helder; Nathalie Bravenboer; Christiaan M Ten Bruggenkate; Jianfeng Jin; Jenneke Klein-Nulend; Engelbert A J M Schulten Journal: Stem Cells Int Date: 2019-12-30 Impact factor: 5.443