Relation between initial implant stability quotient and bone-implant contact percentage: an in vitro model study

2013 ◽  
Vol 116 (5) ◽  
pp. e356-e361 ◽  
Author(s):  
Heng-Li Huang ◽  
Ming-Tzu Tsai ◽  
Kuo-Chih Su ◽  
Yu-Fen Li ◽  
Jui-Ting Hsu ◽  
...  
Keyword(s):  
In Vitro Model ◽  
Implant Stability ◽  
Bone Implant ◽  
Implant Stability Quotient ◽  
Model Study ◽  
Bone Implant Contact ◽  
Vitro Model

Influence of biofilm removal from the tooth-restoration interface on the progression of secondary caries lesions: a preliminary in vitro model study

Biofouling ◽  
2021 ◽  
pp. 1-12
Author(s):  
Cácia Signori ◽  
Tamires Timm Maske ◽  
Vitor Henrique Digmayer Romero ◽  
Maximiliano Sérgio Cenci
Keyword(s):  
In Vitro Model ◽  
Secondary Caries ◽  
Model Study ◽  
Biofilm Removal ◽  
Vitro Model ◽  
Caries Lesions

Effect of fluoride-releasing restorative materials on bacteria-induced pH fall at the bacteria–material interface: An in vitro model study

2014 ◽  
Vol 42 (1) ◽  
pp. 15-20 ◽  
Author(s):  
Gen Mayanagi ◽  
Koei Igarashi ◽  
Jumpei Washio ◽  
Hitomi Domon-Tawaraya ◽  
Nobuhiro Takahashi
Keyword(s):  
In Vitro Model ◽  
Material Interface ◽  
Model Study ◽  
Restorative Materials ◽  
Vitro Model

Potential of Raloxifene in reversing osteoarthritis-like alterations in rat chondrocytes: An in vitro model study

2012 ◽  
Vol 38 (1) ◽  
pp. 135-147 ◽  
Author(s):  
Aysegul Kavas ◽  
Seda Tuncay Cagatay ◽  
Sreeparna Banerjee ◽  
Dilek Keskin ◽  
Aysen Tezcaner
Keyword(s):  
In Vitro Model ◽  
Model Study ◽  
Vitro Model

Studies in Cranial Suture Biology: In Vitro Cranial Suture Fusion

1996 ◽  
Vol 33 (2) ◽  
pp. 150-156 ◽  
Author(s):  
James P. Bradley ◽  
Jamie P. Levine ◽  
Christopher Blewett ◽  
Thomas Krummel ◽  
Joseph G. Mccarthy ◽  
...  
Keyword(s):  
Organ Culture ◽  
In Vitro Model ◽  
In Vitro Study ◽  
Cranial Base ◽  
Cranial Suture ◽  
Model Study ◽  
Suture Fusion ◽  
Vitro Model

The biology underlying craniosynostosis remains unknown. Previous studies have shown that the underlying dura mater, not the suture itself, signals a suture to fuse. The purpose of this study was to develop an in vitro model for cranial-suture fusion that would still allow for suture-dura interaction, but without the influence of tensional forces transmitted from the cranial base. This was accomplished by demonstrating that the posterior frontal mouse cranial suture, known to be the only cranial suture that fuses in vivo, fuses when plated with its dura in an organ-culture system. In such an organ-culture system, the sutures are free from both the influence of dural forces transmitted from the cranial base and from hormonal influences only available in a perfused system. For the cranial-suture fusion in vitro model study, the sagittal sutures (controls that remain patent in vivo) and posterior frontal sutures (that fuse in vivo) with the underlying dura were excised from 24-day-old euthanized mice, cut into 5 × 4 × 2-mm specimens, and cultured in a chemically defined, serum-free media. One hundred sutures were harvested at the day of sacrifice, then every 2 days thereafter until 30 days in culture, stained with H & E, and analyzed. A subsequent cranial-suture without dura in vitro study was performed in a similar fashion to the first study, but only the calvariae with the posterior frontal or sagittal sutures (without the underlying dura) were cultured. Results from the cranial-suture fusion in vitro model study showed that all sagittal sutures placed in organ culture with the underlying dura remained patent. More importantly, the posterior frontal sutures with the underlying dura, which were plated-down as patent at 24 days of age, demonstrated fusion after various growth periods in organ culture. In vitro posterior frontal mouse-suture fusion occurred in an anterior-to-posterior direction but in a delayed fashion, 4 to 7 days later than in vivo posterior frontal mouse-suture fusion. In contrast, the subsequent cranial-suture without dura in vitro study showed patency of all sutures, including the posterior frontal suture. These data from in vitro experiments indicate that: (1) mouse calvariae, sutures, and the underlying dura survive and grow in organ-culture systems for 30 days; (2) the local dura, free from external influences transmitted from the cranial base and hormones from distant sites, influences the cells of its overlying suture to cause fusion; and (3) without dura influence, all in vitro cranial sutures remained patent. By first identifying the factors involved in dural-suture signaling and then regulating these factors and their receptors, the biologic basis of suture fusion and craniosynostosis may be unraveled and used in the future to manipulate pathologic (premature) suture fusion.

scholarly journals Cytotoxic and genotoxic potential of Bulgarian Rosa alba L. essential oil – in vitro model study

2018 ◽  
Vol 32 (2) ◽  
pp. 513-519 ◽  
Author(s):  
Gabrielle Jovtchev ◽  
Alexander Stankov ◽  
Almira Georgieva ◽  
Anna Dobreva ◽  
Rumiana Bakalova ◽  
...  
Keyword(s):  
Essential Oil ◽  
In Vitro Model ◽  
Genotoxic Potential ◽  
Model Study ◽  
Vitro Model

The Effect of Angle and Flow Rate Upon Hemodynamics in Distal Vascular Graft Anastomoses: An In Vitro Model Study

1991 ◽  
Vol 113 (4) ◽  
pp. 458-463 ◽  
Author(s):  
R. S. Keynton ◽  
S. E. Rittgers ◽  
M. C. S. Shu
Keyword(s):  
Stagnation Point ◽  
Flow Rate ◽  
In Vitro Model ◽  
Laser Doppler Anemometry ◽  
Bypass Graft ◽  
Outer Wall ◽  
Model Study ◽  
Vitro Model ◽  
Junction Angle

A steady flow, in vitro model of distal arterial bypass graft junctions was used to examine the effects of junction angle and flow rate on the local velocity field. Three test sections were fabricated from Plexiglas™ tubing having anastomotic junction angles of either 30, 45, or 60 deg. Flow visualization revealed velocity profiles skewed toward the outer wall with a flow split around a clear stagnation point along the outer wall. Laser Doppler anemometry [LDA] measurements confirmed a distinct stagnation point at the outer wall and both reverse and forward shear were detected immediately upstream and downstream, respectively, of this site. Axial velocities and shear rates along the outer wall were higher than along the inner wall and occurred in the junction angle order: 45, 60, and 30 deg. This study clearly identified changes in wall shear which varied with the anastomotic angle and flow rate.

scholarly journals Anodisation Increases Integration of Unloaded Titanium Implants in Sheep Mandible

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Warwick J. Duncan ◽  
Min-Ho Lee ◽  
Tae-Sung Bae ◽  
Sook-Jeong Lee ◽  
Jennifer Gay ◽  
...  
Keyword(s):  
Titanium Implant ◽  
Titanium Implants ◽  
Implant Stability ◽  
Bone Implant ◽  
Implant Stability Quotient ◽  
Phosphate Ions ◽  
Surface Control ◽  
Bone Implant Contact ◽  
The Subject ◽  
Clinically Significant

Spark discharge anodic oxidation forms porous TiO2films on titanium implant surfaces. This increases surface roughness and concentration of calcium and phosphate ions and may enhance early osseointegration. To test this, forty 3.75 mm × 13 mm titanium implants (Megagen, Korea) were placed into healed mandibular postextraction ridges of 10 sheep. There were 10 implants per group: RBM surface (control), RBM + anodised, RBM + anodised + fluoride, and titanium alloy + anodised surface. Resonant frequency analysis (RFA) was measured in implant stability quotient (ISQ) at surgery and at sacrifice after 1-month unloaded healing. Mean bone-implant contact (% BIC) was measured in undemineralised ground sections for the best three consecutive threads. One of 40 implants showed evidence of failure. RFA differed between groups at surgery but not after 1 month. RFA values increased nonsignificantly for all implants after 1 month, except for controls. There was a marked difference in BIC after 1-month healing, with higher values for alloy implants, followed by anodised + fluoride and anodised implants. Anodisation increased early osseointegration of rough-surfaced implants by 50–80%. RFA testing lacked sufficient resolution to detect this improvement. Whether this gain in early bone-implant contact is clinically significant is the subject of future experiments.

scholarly journals Supraphysiological loading induces osteocyte-mediated osteoclastogenesis in a novel in vitro model for bone implant loosening

2017 ◽  
Vol 36 (5) ◽  
pp. 1425-1434 ◽  
Author(s):  
Anna Fahlgren ◽  
Cornelia Bratengeier ◽  
Cornelis M. Semeins ◽  
Jenneke Klein-Nulend ◽  
Astrid D. Bakker
Keyword(s):  
In Vitro Model ◽  
Implant Loosening ◽  
Bone Implant ◽  
Vitro Model
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