Brushite


Also found in: Medical, Encyclopedia, Wikipedia.

Brush´ite


n.1.(Min.) A white or gray crystalline mineral consisting of the acid phosphate of calcium.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Similarly, phosphoric acid contamination resulted in formation of brushite, merlinoite and dawsonite minerals.
The main constituent of calcium stones is brushite (calcium hydrogen phosphate) or hydroxyapatite [31, 32].
The Ho:YAG is capable of fragmenting calculus of all known composition, including hard calcium oxalate monohydrate, brushite, and cystine calculus [21, 23, 24, 26].
In specimens #12 and #75, both containing a significant quantity of carboapatite (60 and 10%, resp.), a tiny quantity below the cutoff limit (<5%) of brushite and/or octacalcium phosphate was also identified by FT-IR spectroscopy.
Calcium oxalate makes up about 60% of all stones; mixed calcium oxalate and hydroxyapatite 20% and brushite stones 2%.
However, EWSL SFRs are significantly decreased under the following circumstances: shock-wave-resistant stones (formed of calcium oxalate monohydrate, brushite, or cystine); the presence of a steep infundibular-pelvic angle; the presence of a long lower pole calyx (>10 mm); and the presence of a narrow infundibulum (<5 mm) (2).
SEM images and XRD analysis of the Ca-P deposit indicated the initial formation of brushite with its monoclinic crystal structure and characteristic peak at 11.76 2[theta], and electrochemical conversion of brushite to hydroxyapatite on silk after electrochemical cathodization as confirmed by XRD and SEM analysis.
While in America, a study from Mayo Clinic Metals Laboratory (n = 43935) showed that oxalate (67%) was the most common type followed by hydroxyapatite (16%), uric acid (8%), struvite (3%), brushite (0.9%), and cystine (0.35%) [20].
By contrast, acidic calcium phosphates, dicalcium phosphate anhydrous (CaHP[O.sub.4] , DCPA, Monetite) and dicalcium phosphate dehydrate (CaHP[O.sub.4]-[H.sub.2]O, DCPD, Brushite), are more degradable at physiologic pH than HA and will form a [Ca.sup.2+] and P[O.sub.4.sup.3-] supersaturated zone at the interface of implant and bone that may induce osteoblastic differentiation [6].
In a typical electrochemical deposition, a precursor (brushite) is first formed that is converted into hydroxyapatite (HA) through an ageing process.
Riley, "Transformation of modified brushite to hydroxyapatite in aqueous solution: effects of potassium substitution," Biomaterials, vol.