LED photobiomodulation therapy combined with biomaterial as a scaffold promotes better bone quality in the dental alveolus in an experimental extraction model.

A bone scaffold added to the dental alveolus immediately after an extraction avoids bone atrophy and deformity at the tooth loss site, enabling rehabilitation with implants. Photobiomodulation accelerates bone healing by stimulating blood flow, activating osteoblasts, diminishing osteoclastic activity, and improving the integration of the biomaterial with the bone tissue. The aim of the present study was to evaluate the effect of photobiomodulation with LED at a wavelength of 850 nm on bone quality in Wistar rats submitted to molar extraction with and without a bone graft using hydroxyapatite biomaterial (Straumann® Cerabone®).

Melanin pigmented gingival tissue impairs red-light lateral scattering for antimicrobial photodynamic therapy.

Gingival melanin pigmentation is present in many African and Oriental descendant people and its occurrence in patients may interfere with the absorption and scattering of therapeutic doses of light. Antimicrobial photodynamic therapy (aPDT) is used as an adjunctive treatment for periodontitis and light irradiation may be impaired by tissue size and its melanin content. The aim of this clinical study was to measure the red-light attenuation in gingival tissue naturally pigmented with melanin.

Antimicrobial photodynamic therapy mediated by methylene blue in surfactant vehicle on periodontopathogens.

Background: Periodontal disease (PD) is a chronic inflammatory disease caused by the presence of microbial biofilm. The aim of this study was to evaluate antimicrobial effect of antimicrobial photodynamic therapy (A-PDT) mediated by methylene blue (MB) in monomer form on A. actinomycetemcomitans and P.

Antimicrobial photodynamic chemotherapy mediated by PapaMBlue on chronic periodontal disease: Study protocol for a randomized, blind, controlled trial.

Background: The elimination of the pathogenic microorganisms of the periodontal pocket is one of the main points for success in periodontal treatment. The objective of this study is to investigate the clinical and antimicrobial effect of papain-mediated photodynamic therapy in the clinical treatment of periodontal disease.

Methods: Twenty patients with chronic periodontitis will be selected.

New experimental models for the in vitro reconstitution of human bladder mucosa.

This study describes two experimental models for the in vitro reconstitution of the human bladder mucosa (neo-bladder): human urothelial stabilized cell lines were cultured on three-dimensional matrices, collagen or platelet-fibrin gels, containing murine fibroblast 3T3-J2 cells. Low-density seeding (2x10(4) cells/ml) of both normal (TCA-48) and neoplastic cell lines (TCA-47) on collagen matrix gave rise to isolated papillar colonies, while high-density seeding (3.75x10(6) cells/ml) led to the formation of wide pluristratified epithelial sheets, resembling the normal transitional epithelium.

[Prostatic tumor: how many biopsies?].

Introduction: Ultrasound-guided prostatic biopsy is usually performed by sextants according to Hodge, but the authors feel that 6 biopsies are insufficient. It has been suggested that the number of prostatic biopsies be increased and the mapped areas extended, but this causes discomfort to patients and increases effective costs. The authors suggest repetition of biopsies in "risk" cases, routinely selecting patients taking into account the best cost-benefit ratio.

Production of epidermal growth factor in human prostatic cells cultured in vitro.

The Epidermal Growth Factor (EGF) plays an important role in the regulation of in vitro growth of prostate cells inducing a strong mitogenic effect. Nevertheless in our previous study we observed that the treatment of human hypertrophic prostate cell line U285 with exogenous EGF produces a restricted effect on the cellular growth rate. This phenomenon could be due to the capacity of the cells to produce EGF.

[Cost analysis of ultrasound-guided transrectal needle biopsy in prostatic carcinoma].

Introduction: The literature mortality and morbidity rates from prostatic carcinoma prompt to the better use of some routine diagnostic tools such as transrectal ultrasound-guided biopsy. We evaluated the overall cost of transrectal ultrasound biopsy (TRUSB) of the prostate and investigated the economic impact of the procedures currently used to diagnose prostatic carcinoma.

Material And Methods: The total cost of TRUSB was calculated with reference to 247 procedures performed in 1996.

Effects of DHT and EGF on human hyperplastic prostate cells cultured in vitro: growth, morphology and phenotype characterisation.

This work studies the effects of dihydrotestosterone (DHT) and epidermal growth factor (EGF) on the growth, morphology and phenotype characterisation of the U285 line obtained from human prostate hyperplastic tissue. Modifications of growth rate induced by these two substances have been evaluated by means of the neutral red assay formulated by Borenfreund and Puerner (1985) as well as by means of Kenacid blue assay described by Knox et al. (1986), culturing cells for 24, 48 and 72 hr with scalar doses of DHT (0.

Uptake and intracellular distribution of idarubicin in secondary cultures of normal and neoplastic urothelium.

This study analyzes the uptake and endocellular distribution of idarubicin (IDA) in normal and neoplastic urothelial secondary cultures in relation to the changes in concentration and time of exposure. The urothelial lines were isolated by Freshney's method from biopsy fragments taken from five patients with superficial bladder cancer. Pharmacological experiments were carried out on subcultures previously immunophenotypically characterized and did not exceed ten passages.

[Persistent sciatic artery aneurysm. Case report].

Persistent sciatic artery is a rare vascular anomaly particularly interesting for possible complications as buttock aneurysm and ischemic or embolic. Authors describes a case of buttock aneurysm of persistent sciatic artery personally observed analyse its anatomic and clinical features, and lay stress on the importance of angiography as essential examination in order to an exact surgical treatment.

Growth, morphology, and morphometry of human hypertrophic prostate cells treated with suramin in vitro.

This work studies the effects of suramin on the growth and morphology of cell strain U285, obtained from human prostate hypertrophic tissue and cultured in vitro. The FRAME cytotoxicity test was performed to evaluate the inhibition of growth induced by suramin. Cells were exposed to suramin at the time of seeding and 24 hours later; neutral red was added with and without suramin.

Effect of alkaline citrate therapy on clearance of residual renal stone fragments after extracorporeal shock wave lithotripsy in sterile calcium and infection nephrolithiasis patients.

The natural history of post-extracorporeal shock wave lithotripsy residual stone fragments (clearance, growth and aggregation) is incompletely known, even though they are believed to constitute a risk in terms of new stone formation and persistent infection of the urinary tract. We addressed this issue and the hypothesis that alkaline citrate therapy improves residual stone fragment clearance in a 12-month followup study. There were 40 sterile calcium and 30 struvite stone patients with residual fragments after extracorporeal shock wave lithotripsy (diameter less than 5 mm.

Epistaxis in renal carcinoma.

A 62-year-old man presented with recurrent epistaxis and a mass in the left nostril. Histological examination of the excised tissue showed clear cell carcinoma and he was found to have an asymptomatic carcinoma of the right kidney. A year after right nephrectomy, excision of the left maxilla, and radiotherapy he was well with no sign of recurrence.

Recombinant alpha interferon in metastatic renal cell carcinoma. A cooperative phase II study.

A total of 61 evaluable patients with advanced renal cell carcinoma have been treated with 3 x 10(6) IU per square meter of body surface with recombinant alpha 2b interferon three times a week within a Cooperative Phase II Study. Toxic death for terminal renal failure occurred in 1 patient (1.63%), and toxicities greater than WHO grade 2 were present in 10 cases (16%).

Antegrade ureterolitholapaxy in the treatment of obstructing or incarcerated proximal ureteric stones.

Extracorporeal shockwave lithotripsy (ESWL) and retrograde ureterorenoscopy (RU) have transformed the management of ureteric calculi. Nevertheless, patients with obstructing proximal ureteric calculi are not suitable for ESWL or RU. From January 1986 to September 1988, 17 patients with fixed upper ureteric stones underwent antegrade renoureteroscopy and percutaneous surgery.

[Clinico-morphologic correlations of lesions induced by adriamycin administered in the thoracic aorta].

The Authors, on the basis of 9 casual radiographic observations of thoracic aortic ectasy in subjects affected of neoplasms and previously treated with antitumoral drugs, hypothesize a possible correlation between the use of adriamycin and the appearance of the aortic lesion. So, they suggest an experimental study on 12 rabbits. They administered adriamycin 2 mg/kg twice weekly for 5 weeks to 8 rabbits.

[Aneurysms of the internal carotid artery. Apropos of a case].

Aetiopathogenetic mechanisms and clinical aspects of carotid artery aneurysms are examined and personal experience of arterial reconstruction in one case reported.

[Cancer of the prostate. Clinical estimation and results of radical prostatectomy].

The authors present their experience about the accuracy of staging and the results of radical prostatectomy in prostatic cancer. From january 1978 to september 1988, 47 patients with clinically localized prostatic carcinoma underwent staging pelvic lymphadenectomy, of whom 36 had proven negative pelvic lymph nodes and 1 had only a micrometastasis in the obturatory nodes. We reviewed the surgical results and survival of these 37 patients who underwent radical prostatectomy.

Multiple simultaneous bilateral urothelial tumours of the renal pelvis.

Three cases of simultaneous bilateral transitional cell carcinoma of the renal pelvis are reported. In one case the bladder and urethra were also involved. The information provided by radiological studies (particularly renal angiography) and cytology allowed us to define with accuracy not only tumour sites but also the tumour itself and the degree of malignancy.