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Search Publications by: Shozo Takagi (Assoc)

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Displaying 1 - 25 of 54

Engineering 3D Printed Scaffolds with Tunable Hydroxyapatite

June 15, 2022
Author(s)
Yoontae Kim, Eun Jin Lee, Anthony Kotula, Shozo Takagi, Laurence C. Chow, Styliani Alimperti
Bone grafting is a surgical procedure to bone repair due to trauma or diseases in the craniofacial and dental area. Current limitations of autogenous and allogeneic grafts are often associated with reduced host-graft integration due to geometrical confor

Properties of Calcium Phosphate Cement with Chondroitin Sulfate

October 12, 2021
Author(s)
S Hirayama, Francis W. Wang, Shozo Takagi, T Ikemi
The objectives of this study were to evaluate the setting times, mechanical strengths and hydroxyapatite (HA) conversion of polymer-modified self-hardening calcium phosphate cements (CPCs) that were prepared with chondroitin sulfate solutions of various

Influence of Particle Size on DCPD Hydrolysis and Setting Properties of TTCP/DCPD Cement

February 19, 2017
Author(s)
Limin Sun, Laurence C. Chow, Shozo Takagi, Elena F. Burguera, Stanislav Frukhtbeyn
This study investigated the effects of particle size on the hydrolysis reaction of DCPD at pH 7 and 37 C and on the setting properties of a TTCP/DCPD cement. The kinetics of the hydrolysis reaction was controlled by a nucleation and growth mechanism

In Vitro and in Vivo Characteristics of Fluorapatite-forming Calcium Phosphate Cements

August 1, 2010
Author(s)
Shozo Takagi, Stanislav A. Frukhtbeyn, Laurence C. Chow, Akiyoshi Sugawara, Kenji Fujikawa, Kidehiro Ogata, Makoto Hayashi, Bunnai Ogiso
This study reports for the first time in vitro and in vivo properties of fluorapatite (FA)-forming calcium phosphate cements (CPCs). The experimental cements contained from (0 to 3.3) mass % of F, corresponding to presence of FA at levels of approximately

Properties of Injectable Apatite-Forming Premixed Cements

April 10, 2010
Author(s)
Yasushi Shimada, Laurence Chow, Shozo Takagi, Junji Tagami
A previously reported, premixed calcium phosphate cements (CPC) forms hydroxyapatite (HA) as the only product, but had a setting time greater than 60 min. This study investigated properties of fast-hardening HA-forming premixed CPCs. All cements consisted

In Vitro Remineralization of Artificial Tooth Lesions with Ca-PO 4 Resin Cements

October 16, 2008
Author(s)
Sabine H. Dickens, Glenn M. Flaim, Shozo Takagi
Resin-based Ca-PO 4 cements without (Cement A) and with a fluoride-releasing additive (Cement B) were used to treat caries-like lesions on enamel and dentin thin sections of human molars (Model I), which were then incubated for up to 6 weeks in distilled H

Injectable Calcium Phosphate Cements

October 16, 2008
Author(s)
Laurence C. Chow, Milenko Markovic, Shozo Takagi
Self-hardening calcium phosphate cements (CPC) have been the subject of considerable interest in biomaterials research, especially as a bone graft material. The first published CPCs consisted of tetracalcium phosphate (TTCP) and dicalcium phosphate

Moldable, Resorbable, Composite Bone Grafts Consisting of Calcium Phosphate Cement and Polymeric Microspheres: Mechanical Properties, Degradation Kinetics and Release of Bioactive Molecules

October 16, 2008
Author(s)
Francis W. Wang, C A. Khatri, J F. Hsii, S Hirayama, Shozo Takagi
We have developed new moldable, resorbable, composite bone grafts made of calcium phosphate cement (CPC) and poly(d,l-lactide-co-glycolide) [PLGA] microspheres or other porogens that allow control release of growth factors. The mass of the PLGA/CPC

Properties of Calcium Phosphate Carbonate Cements

October 16, 2008
Author(s)
Milenko Markovic, Shozo Takagi, Laurence C. Chow
The physicochemical and mechanical properties of two calcium phosphate carbonate cements (CPCC-1 and CPCC-2) formed in solution reaction of (1) [alpha]-tricalcium phosphate ([alpha]-TCP),[alpha]-Ca 3 (PO 4) d2^, with calcium carbonate, CaCO 3 , and (2)

Ca Pre-Rinse Greatly Increases Plaque and Plaque Fluid F After a F Rinse

May 1, 2008
Author(s)
Gerald L. Vogel, Gary E. Schumacher, Laurence C. Chow, Shozo Takagi, Clifton M. Carey
This study examines if a Ca pre-rinse/F rinse increased plaque and plaque fluid F relative to the F rinse alone. Subjects (n = 13) accumulated plaque two days before rinsing with: (1) 12 mmol/L F (NaF), (2) 150 mmol/L Ca rinse, (3) the Ca rinse followed by

Calcium Phosphate Cement With Non-Rigidity and Strength Durability for Periodontal Bone Repair

August 1, 2006
Author(s)
Hockin D. Xu, Shozo Takagi, Limin Sun, L A. Hussain, Laurence C. Chow, William F. Guthrie, James H. Yen
Background. The need for biomaterials to treat periodontal osseous defects has increased as the world population ages. The objective of the present study was to develop a self-hardening, resorbable, and mech/anically strong calcium phosphate cement (CPC)

Fast Setting CPC-Chitosan Composite: Mechanical Properties and Dissolution Rates

March 16, 2006
Author(s)
Limin Sun, Hockin D. Xu, Shozo Takagi, Laurence C. Chow
Calcium phosphate cement (CPC) can self-harden in vivo to form hydroxyapatite with excellent osteoconductivity. In recent studies, CPC-chitosan composites were developed with high mechanical strength and washout resistance. The objectives of the present

Effect of a Calcium Pre-Rinse on Salivary Fluoride After a 228-ppm Fluoride Rinse

August 1, 2005
Author(s)
Gerald L. Vogel, Laurence C. Chow, Clifton M. Carey, Gary E. Schumacher, Shozo Takagi
The objective of this study was to determine if a concentrated calcium pre-rinse given before a F rinse would cause an increase in the post rinse salivary fluoride (F). The three pre-rinses tested, (30, 150 or 300) mmol/L calcium as calcium lactate