Evaluation of Corrosion and Tarnishing of Intra-oral Nickel Chromium and Gold-alloy Cast Crown

Although esthetic factors might limit by the presentation of materials used, all-metal complete cast crown should always be offered to patients requiring restoration of endodontically treated posterior tooth. The complete cast crown has the highest longevity of all fixed restorations. It could be used to rebuild a single tooth or a retainer for a fixed prosthesis. It involves all the axial walls as well as the occlusal surface of the tooth to be restored. All restorations are placed in the oral environment in contact with the gingival tissue. Thus clinicians must choose nontoxic or least toxic metal alloys, since any release of elements that might cause reactions. This study was designed to observe clinical responses of nickel chromium alloy and gold alloy cast crown and provide guidance to ascertain the best alloy for cast metal crown, which serves better functional restoration.

Evaluation of Intraoral Burning Sensation in Response to Heat-Cured and Self-Cured Acrylic Resin Denture Base Material

The objective of this prospective experimental clinical trial was to evaluate intraoral burning sensation in response to heat-cured and self-cured acrylic resin denture base material and carried out in the department of Prosthodontics of Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh from February 2014 to September 2015. Forty eight patients were evaluated in this study; of them 35(72.92%) patients were male and 13(27.08%) patients were female with age range from 24 to 70 years. In this study 48 patients were evaluated in term of burning sensation, of them 24 patients were provided with heat-cured acrylic resin denture and were considered as Group A and 24 patients were provided with self-cured acrylic resin denture and were considered as Group B. In Group A 14(58.4%) at 1st week, 2(8.4%) at 1st month, 10(41.8%) at 3rd month and 5(21.0%) at 6th month developed burning sensation. On the other hand the values were 18(75.0%), 22(91.6%), 14(58.2%) and 2(8.4%) at 1stweek, 1st month, 3rd month, and 6th month respectively. Chi-square test was done for statistical analysis and p value was <0.05. So, results were statistically significant.

Anesthetic considerations in a parturient with oral-facial-digital syndrome and repaired tetralogy of Fallot with left ventricular dysfunction

Oral-Facial-Digital syndrome or Mohr syndrome is a rare congenital disorder characterized by malformations of face, oral cavity, laryngeal structures, trachea, and digits, muscular-skeletal abnormalities, and congenital cardiac defects. In this case report, we describe the anesthetic management of a parturient with Oral-Facial-Digital syndrome type II and repaired tetralogy of Fallot with left ventricular dysfunction.

Differentiation of dental pulp stem cells into islet-like aggregates

The post-natal dental pulp tissue contains a population of multipotent mesenchymal progenitor cells known as dental pulp stromal/stem cells (DPSCs), with high proliferative potential for self-renewal. In this investigation, we explored the potential of DPSCs to differentiate into pancreatic cell lineage resembling islet-like cell aggregates (ICAs). We isolated, propagated, and characterized DPSCs and demonstrated that these could be differentiated into adipogenic, chondrogenic, and osteogenic lineage upon exposure to an appropriate cocktail of differentiating agents. Using a three-step protocol reported previously by our group, we succeeded in obtaining ICAs from DPSCs. The identity of ICAs was confirmed as islets by dithiozone-positive staining, as well as by expression of C-peptide, Pdx-1, Pax4, Pax6, Ngn3, and Isl-1. There were several-fold up-regulations of these transcription factors proportional to days of differentiation as compared with undifferentiated DPSCs. Day 10 ICAs released insulin and C-peptide in a glucose-dependent manner, exhibiting in vitro functionality. Our results demonstrated for the first time that DPSCs could be differentiated into pancreatic cell lineage and offer an unconventional and non-controversial source of human tissue that could be used for autologous stem cell therapy in diabetes.

Treatment of external genital warts comparing cryotherapy (liquid nitrogen) and trichloroacetic acid

BACKGROUND AND OBJECTIVES

To evaluate and compare the efficacy and adverse effects of trichloracetic acid and cryotherapy (using liquid nitrogen) in the treatment of external genital warts.

STUDY DESIGN

Eighty-six patients were enrolled into a randomized clinical trial in the Genitourinary Medicine Department of the Coventry and Warwickshire Hospital (Coventry) between November 1990 and June 1991. External genital warts were treated with either trichloracetic acid or cryotherapy (using liquid nitrogen) on a once weekly basis. They received up to six treatments of either therapy.

RESULTS

Complete clearance of warts in patients who received up to six treatments of cryotherapy were observed in 86% of cases and in 70% of patients who received up to six treatments of trichloracetic acid. Thirty percent of patients who were treated with trichloracetic acid developed ulcerations at the site of its application.

CONCLUSION

In this study we found that cryotherapy (using liquid nitrogen) is more effective than that of trichloracetic acid for the treatment of external genital warts. It is also less likely to cause ulceration.

Balanitis (balanoposthitis) in patients attending a department of genitourinary medicine

Eighty-six patients with balanitis/balanoposthitis who presented at the department of genitourinary medicine in Coventry between October 1989 and August 1990 were investigated. While 34 (41%) cases had no specific aetiological factor Candida spp. accounted for 26 cases (30%), and group B beta haemolytic streptococci for 11 cases (13%) (one patient, a diabetic, was culture positive for both Candida spp. and group B beta haemolytic streptococci). The remaining 14 patients had other miscellaneous causes of balanitis/balanoposthitis.

Thromboangiitis obliterans (Bürger's disease) in a woman--a case report and review of the literature

We report the case of a 43-year-old woman, a longstanding heavy cigarette smoker, who developed Bürger's disease, leading to mid-thigh amputation of her left leg. After she gave up smoking her disease was arrested but Raynaud's phenomenon continues to affect her hands and right foot. In reviewing the literature, we found only 25 previous well-documented cases of Bürger's disease occurring in females that would satisfy clinical, angiographic and histological criteria to make this diagnosis probable.

Behçet's syndrome with gastro-intestinal tract involvement mimicking carcinoma of the caecum--a case report

A 43-year-old patient with a 2-year history of orogenital ulceration and hypochromic anaemia developed rapid loss of weight over a period of a few months and presented with a mass in the right iliac fossa, suggestive, clinically and radiologically, of a carcinoma of the caecum. The mass was removed by standard right hemicolectomy. Examination of the resected specimen revealed a large, irregular, ulcerated area of the caecum measuring 7 cm in diameter extending through all the layers of the intestinal wall. Histology showed a non-specific inflammatory infiltrate. One large artery in the pericolic tissue was occluded by organizing thrombus. Five years after the operation, he developed epileptiform seizures. CT scan showed a small infarct in the left insular area of the brain. Six months later he was admitted to another hospital with profuse diarrhoea and died within 24 h from cardiac arrest.

Cutaneous and ocular side-effects of PUVA photochemotherapy--a 10-year follow-up study

To record the potentially serious side-effects of melanoma and non-melanoma skin cancers and ocular damage following long-term PUVA chemotherapy, we re-examined 198 of 242 patients. These comprised: 90 with psoriasis, 27 with parapsoriasis, 19 with cutaneous T-cell lymphoma, 23 with vitiligo, eight with cutaneous mastocytosis, 16 with atopic dermatitis, three with prurigo nodularis, two with polymorphous light eruption and 10 with pruritus of chronic renal failure on dialysis, treated between 1977 and 1987 in our department. During the 10-year period, 11 patients died of unrelated disease. None of the patients reviewed had previous skin cancer or had been treated with arsenic, methotrexate or ionizing irradiation before PUVA treatment. None of the patients were children under 16 years of age. The mean age was 54.5 years, the sex ratio 102:96 (M:F). The mean cumulative dose of UVA for the whole group was 169.5 J/cm2. One patient with psoriasis, psoriatic arhropathy, ankylosing spondylitis and Crohn's disease, who was on azathioprine for 6 years, developed squamous-cell carcinoma on the left lower leg. Another patient with pustular psoriasis, who received PUVA treatment to her palms and soles only, developed malignant lentigo of Hutchinson on the right lower leg. PUVA lentigines were found in about 20% of patients. All patients had a yearly ophthalmological examination. None of them developed cataracts, lens opacities or had impairment of their visual acuity.

Skin necrosis in giant cell (temporal) arteritis: report of three cases

Three elderly, female patients presented with scalp ulceration. One developed sudden blindness before the ulceration of the scalp. Biopsy from the ulcerated area in this patient did not show evidence of giant cell arteritis, but the two other patients had histological evidence of giant cell arteritis and one of these also became blind.