We report that wall ingrowth deposition in phloem parenchyma (PP) transfer cells (TCs) in leaf veins of Arabidopsis (Arabidopsis thaliana) represents a novel trait of heteroblasty. Development of PP TCs involves extensive deposition of wall ingrowths adjacent to cells of the sieve element/companion cell complex. These PP TCs potentially facilitate phloem loading by enhancing efflux of symplasmi...

Biophysical stimuli may be an effective therapy to counteract age-related changes in bone structure that affect the primary stability of implants used in joint replacement or fracture fixation. The influence of controlled mechanical loading on osseointegration was investigated using an in vivo device implanted in the distal lateral femur of 12 male rabbits. Compressive loads (1 MPa, 1 Hz, 50 cy...

We designed an in vivo study to determine if the superimposition of a microtexture on the surface of sintered titanium beads affected the extent of bone ingrowth. Cylindrical titanium intramedullary implants were coated with titanium beads to form a porous finish using commercial sintering techniques. A control group of implants was left in the as-sintered condition. The test group was etched i...

A porous structure comprises pores and pore throats with a complex three-dimensional (3D) network structure, and many investigators have described the relationship between average pore size and the amount of bone ingrowth. However, the influence of network structure or pore throats for tissue ingrowth has rarely been discussed. Four types of bioactive porous titanium implants with different por...

Clark, Paul A., Anthony Rodriguez, D. Rick Sumner, Mohammad A. Hussain, and Jeremy J. Mao. Modulation of bone ingrowth of rabbit femur titanium implants by in vivo axial micromechanical loading. J Appl Physiol 98: 1922–1929, 2005. First published January 7, 2005; doi:10.1152/japplphysiol.01080.2004.—Titanium implants commonly used in orthopedics and dentistry integrate into host bone by a compl...

BACKGROUND AND PURPOSE Porous titanium (Ti) particles can be impacted like cancellous allograft bone particles, and may therefore be used as bone substitute in impaction grafting. We evaluated the effect of impaction and of a thin silicated biphasic calcium phosphate coating on osteoconduction by Ti particles. METHODS The bone conduction chamber of Aspenberg was used in goats and filled with ...

We report that wall ingrowth deposition in phloem parenchyma (PP) transfer cells (TCs) in leaf veins of Arabidopsis (Arabidopsis thaliana) represents a novel trait of heteroblasty. Development of PP TCs involves extensive deposition of wall ingrowths adjacent to cells of the sieve element/companion cell complex. These PP TCs potentially facilitate phloem loading by enhancing efflux of symplasmi...

BACKGROUND A novel, biodegradable, aliphatic polyurethane scaffold was designed to fulfill an unmet clinical need in the treatment of patients with irreparable partial meniscal lesions. HYPOTHESIS Treatment of irreparable partial meniscal lesions with an acellular polyurethane scaffold supports new tissue ingrowth. STUDY DESIGN Case series; Level of evidence, 4. METHODS Fifty-two patients...

OBJECTIVES Synthetic calcium phosphate bone substitutes such as hydroxyapatite (HA), beta-tricalcium phosphate (beta-TCP) or mixtures are alternatives to autogenous bone grafts. TricOs T((R)) and Collagraft((R)) are resorbable bone substitutes consisting of biphasic calcium phosphate and a bioactive matrix. Both products have a similar HA to beta-TCP ratio, but differ by their matrix. It was th...

Membranous, bullous, or cystic aplasia cutis congenita is a clinical subtype of aplasia cutis, covered with a membranous or glistening surface. A male newborn presented at birth with two flat lesions on the left parietal scalp, surrounded by a rim of terminal hairs. Physical examination revealed two translucent papules. On dermoscopy, they showed a reddish background, thin, lineal vessels and, ...