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Displaying 26 - 50 of 76

Effects of DCPA Nano-Particle Filler Level on Ca-and-PO 4- Releasing Dental Composites

January 1, 2007
Author(s)
Hockin D. Xu, Michael Weir, Limin Sun, S. Takagi, Laurence C. Chow
Dicalcium phosphate anhydrous (DCPA) nano-particles were recently synthesized. The objective of this study was to investigate the effects of filler level on composite mechanical properties and Ca and PO4 release. Nano DCPA and whiskers were used at DCPA

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

In-Situ Hardening Hydroxyapatite-Based Scaffold for Bone Repair

July 7, 2005
Author(s)
Yu Zhang, Hockin D. Xu, Shozo Takagi, Laurence C. Chow
Musculoskeletal conditions are becoming a major health concern because of an aging population and sports- and traffic-related injuries. While sintered hydroxyapatite implants require machining, calcium phosphate cement (CPC) bone repair material is

Premixed Rapid-Setting Calcium Phosphate Composites for Bone Repair

January 1, 2005
Author(s)
Lisa E. Carey, Hockin D. Xu, Carl G. Simon Jr., Shozo Takagi, Laurence C. Chow
Abstract (A-2000 character or less factual summary of most significant information. If document includes a significant bibliography or literature survey, cite it here. Spell out acronyms on first reference.) Although calcium phosphate cement (CPC) is

A Water Setting Tetracalcium Phosphate- Dicalcium Phosphate Dihydrate Cement

November 1, 2004
Author(s)
Elena F. Burguera, F Guitian, Laurence C. Chow
This paper reports the development of a calcium phosphate cement, comprising tetracalcium phosphate (TTCP) and dicalcium phosphate dihydrate (DCPD), that hardens in 14 min with water as the liquid or 6 min with a 0.25 mol/L sodium phosphate as the liquid

Properties of Elastomeric Calcium Phosphate Cement-Chitosan Composites

December 1, 2003
Author(s)
Shozo Takagi, Laurence C. Chow, S Hirayama, F Eichmiller
Self-hardening calcium phosphate cements (CPC) have been shown to be efficacious in a number of clinical applications for which other currently available materials do not work well. However, for some applications, for example in filling periodontal defects

Premixed Calcium Phosphate Cement Pastes

November 1, 2003
Author(s)
Shozo Takagi, Laurence C. Chow, S Hirayama, A Sugawara
A self-hardening calcium phosphate cement (CPC-I), consisting of tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA), has been shown in clinical studies to be efficacious as bone repair materials. The hardening time (HT) of the cement is

Histopathologic Reaction of a Calcium Phosphate Cement for Alveolar Ridge Augmentation

July 1, 2002
Author(s)
A Sugawara, K Fujikawa, S K. Kusama, M Nishiyama, S Murai, Shozo Takagi, Laurence Chow
The objective of the present study was to evaluate the feasibility of using a calcium phosphate cement (CPC) in the reconstruction of a defective alveolar ridge in conjunction with implant placement. The CPC consisted of an equimolar amount of tetracalcium