scholarly journals Evaluation of Vertical Bone Augmentation Using a Titanium Ring Retained in Simultaneous Implants With Early Exposure: A Pilot Study in Dogs

2021 ◽  
Author(s):  
Qi-Qi Liu ◽  
Jian Yang ◽  
Lin-Jia Lai ◽  
Pei-Zhao Peng ◽  
Mao-Yun Zeng ◽  
...  
Keyword(s):  
Autogenous Bone ◽  
Micro Ct ◽  
Early Exposure ◽  
Bone Augmentation ◽  
Hard Tissue ◽  
Tissue Sections ◽  
Ct Analysis ◽  
Bone Level ◽  
Group Ideal ◽  
Removal Group

Abstract To evaluate the performance of titanium rings retained in implants placed simultaneously for vertical bone augmentation with early exposure. Twenty-four bone level tapered dental implants were inserted in the premolar areas of the mandible with standardized, 3.5 mm deep, vertical bone defects in four beagle dogs, and titanium rings containing a mixture of autogenous bone chips and Bio-oss were retained in the implants for vertical bone augmentation. Three weeks after the operation, all titanium rings were exposed, one titanium ring from each mandible of each dog was removed, and the other titanium ring was left in place with daily flushing. After 2 months, the dogs were sacrificed, the height of vertical bone augmentation was measured, and bone samples containing the implants were harvested and analyzed. The median (minimum-maximum) bone augmentation height (BAH) was 2.46 (2.18-2.62) mm on the buccal side and 2.80 (2.66-3.02) mm on the lingual side in the removal group; however, the BAH was 0.64 (0.32-0.92) mm and 0.70 (0.22-1.22) mm in the holding group. The bone volume/total volume (BV/TV) of the increased bone was 80.07% (72.64%-87.89%) with micro-CT analysis in the removal group, ideal bone osseointegration formed, and new bone was observed in the hard tissue sections. Within its limitations, the use of titanium rings retained in implants was found to be a reliable alternative method for vertical bone augmentation, and removing titanium rings is better for bone augmentation when early exposure occurs.

Histological and micro-CT analysis of peri-implant soft and hard tissue healing on implants with different healing abutments configurations

2018 ◽  
Vol 29 (10) ◽  
pp. 1007-1015 ◽  
Author(s):  
André Barbisan Souza ◽  
AbdulMonem Alshihri ◽  
Peer W. Kämmerer ◽  
Maurício G. Araújo ◽  
German O. Gallucci
Keyword(s):  
Micro Ct ◽  
Hard Tissue ◽  
Tissue Healing ◽  
Ct Analysis

scholarly journals Micro CT Analysis of Hard Tissue Debris Accumulation Created by SAF vs. ProTaper systems

2018 ◽  
Vol 1 (1) ◽  
pp. 55-60
Author(s):  
Diyar Bakr ◽  
◽  
Hussien Al-Hwaizi ◽  
Raid Salman ◽  
◽  
...  
Keyword(s):  
Micro Ct ◽  
Hard Tissue ◽  
Debris Accumulation ◽  
Ct Analysis

Micro‐CT analysis of the Lisfranc complex reveals higher bone mineral density in dorsal compared to plantar regions

2021 ◽  
Author(s):  
Melissa R. Requist ◽  
Yantarat Sripanich ◽  
Tim Rolvien ◽  
Amy L. Lenz ◽  
Alexej Barg
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Micro Ct ◽  
Mineral Density ◽  
Ct Analysis

scholarly journals A Micro-Computed Tomography Comparison of the Porosity in Additively Fabricated CuCr1 Alloy Parts Using Virgin and Surface-Modified Powders

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1995
Author(s):  
Mirko Sinico ◽  
Suraj Dinkar Jadhav ◽  
Ann Witvrouw ◽  
Kim Vanmeensel ◽  
Wim Dewulf
Keyword(s):  
High Energy ◽  
High Energy Density ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Powder Bed ◽  
Metallurgical Defects ◽  
Ct Analysis ◽  
Ct Data ◽  
Surface Modified ◽  
Fusion Pores

Recently, the use of novel CuCr1 surface-modified powder for reliable laser powder-bed fusion (LPBF) manufacturing has been proposed, enabling a broader LPBF processing window and longer powder storage life. Nevertheless, virgin CuCr1 powder is also LPBF processable, on the condition that a high-energy density is employed. In this work, we compare two dense specimens produced from virgin and surface-modified CuCr1 powder. Furthermore, a third sample fabricated from surface-modified powder is characterized to understand an abnormal porosity content initially detected through Archimedes testing. Utilizing high-resolution micro-CT scans, the nature of the defects present in the different samples is revealed. Pores are analyzed in terms of size, morphology and spatial distribution. The micro-CT data reveal that the virgin CuCr1 dense specimen displays keyhole pores plus pit cavities spanning multiple layer thicknesses. On the other hand, the sample fabricated with the surface-modified CuCr1 powder mainly contains small and spherical equi-distributed metallurgical defects. Finally, the CT analysis of the third specimen reveals the presence of a W contamination, favoring lack-of-fusion pores between subsequent LPBF layers. The LPBF melting mode (keyhole or conductive), the properties of the material, and the potential presence of contaminants are connected to the different porosity types and discussed.

scholarly journals Autogenous bone augmentation from the zygomatic alveolar crest: a volumetric retrospective analysis in the maxilla

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Irina Kuster ◽  
Livia Osterwalder ◽  
Silvio Valdec ◽  
Bernd Stadlinger ◽  
Maximilian E. H. Wagner ◽  
...  
Keyword(s):  
Gold Standard ◽  
Donor Site ◽  
Bone Defects ◽  
Donor Site Morbidity ◽  
Bone Volume ◽  
Autogenous Bone ◽  
Bone Augmentation ◽  
Maximum Volume ◽  
Alveolar Crest ◽  
Good Access

Abstract Background Autogenous bone augmentation is the gold standard for the treatment of extended bone defects prior to implantation. Bone augmentation from the zygomatic crest is a valuable option with several advantages, but the current literature for this treatment is scant. The aim of this study was to evaluate the increase in bone volume after locoregional bone augmentation using autogenous bone from the zygomatic alveolar crest as well as the complications and success rate. Results Analysis of the augmented bone volume in seven patients showed a maximum volume gain of 0.97 cm3. An average of 0.54 cm3 of autogenous bone (SD 0.24 cm3; median: 0.54 cm3) was augmented. Implantation following bone augmentation was possible in all cases. Complications occurred in three patients. Conclusion The zygomatic alveolar crest is a valuable donor site for autogenous alveolar onlay grafting in a locoregional area such as the maxillary front. Low donor site morbidity, good access, and its suitable convexity make it a beneficial choice for autogenous bone augmentation.

Additive manufacturing to assist prosthetically guided bone regeneration of atrophic maxillary arches

2015 ◽  
Vol 21 (6) ◽  
pp. 705-715 ◽  
Author(s):  
M. Fantini ◽  
F. De Crescenzio ◽  
L. Ciocca ◽  
F. Persiani
Keyword(s):  
Additive Manufacturing ◽  
Bone Regeneration ◽  
Dental Implants ◽  
Surgical Intervention ◽  
Guided Bone Regeneration ◽  
Autogenous Bone ◽  
Bone Augmentation ◽  
Virtual Planning ◽  
Content Type ◽  
Fused Deposition

Purpose – The purpose of this paper is to describe two different approaches for manufacturing pre-formed titanium meshes to assist prosthetically guided bone regeneration of atrophic maxillary arches. Both methods are based on the use of additive manufacturing (AM) technologies and aim to limit at the minimal intervention the bone reconstructive surgery by virtual planning the surgical intervention for dental implants placement. Design/methodology/approach – Two patients with atrophic maxillary arches were scheduled for bone augmentation using pre-formed titanium mesh with particulate autogenous bone graft and alloplastic material. The complete workflow consists of four steps: three-dimensional (3D) acquisition of medical images and virtual planning, 3D modelling and design of the bone augmentation volume, manufacturing of biomodels and pre-formed meshes, clinical procedure and follow up. For what concerns the AM, fused deposition modelling (FDM) and direct metal laser sintering (DMLS) were used. Findings – For both patients, a post-operative control CT examination was scheduled to evaluate the progression of the regenerative process and verify the availability of an adequate amount of bone before the surgical intervention for dental implants placement. In both cases, the regenerated bone was sufficient to fix the implants in the planned position, improving the intervention quality and reducing the intervention time during surgery. Originality/value – A comparison between two novel methods, involving AM technologies are presented as viable and reproducible methods to assist the correct bone augmentation of atrophic patients, prior to implant placement for the final implant supported prosthetic rehabilitation.

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