ABSTRACT
Objective: To find out the frequency of bracket bond failure in patients with normal overbite and deep bite.Methodology: Sample consisted of 100 patients undergoing fixed orthodontic treatment at Orthodontic Department of Rawal
Institute of Health Sciences, Islamabad between July 2014 and June 2016. Patients were divided into 2 equal groups. 50 patients were with normal overbite [0-2mm] and 50 patients were with deep bite[>2mm]. All patients were bonded with metal brackets and were kept under observation for 12 months for bracket bond failure. SPSS 21 was used for statistical analysis.P-value <0.05was considered statistically significant
Results: 43 patients showed bracket bond failure. 76% patients with deep bite, while 10% patients with normal overbite showed bracket bond failure [p-value <0.05]. Female patients showed more bracket bond failure [43.9%] than male subjects [41.2%]. Bracket bond failure in maxillary arch was 69.8%, whereas it was30.2% in mandibular arch. Bracket breakage was seen in buccal segment in 53.5% of cases, while incidence was 46.5%in labial segment
Conclusion: Bracket bond failure was more common in patients with deep bite. Female patients showed greater incidence and most common location was buccal segment in maxillary arch. Most frequent tooth with bracket bond failure was second premolar
ABSTRACT
In spite of ceramics' desirable esthetics and compressive strength, they are inherently prone to fracture and are weak against tensile and torsional loads. In-Ceram Alumina is a type of reinforced alumina which has been used as a core material for crowns and three units anterior bidges since 90s. Turkom-Cera is presented in the market recently which uses a simple method to produce single and multiple unit anterior and posterior restorations. The purpose of this study is to evaluate the fracture resistance of copings made by these systems. 40 brass dyes were prepared and divided into two groups. To make the copings, impression was taken and model dyes were made. 20 ceramic coping were prepared according to manufacturers instructions for each group, cemented to brass dyes and kept in 100% moisture for one week. Load to fracture test was performed by Universal testing machine and load was applied by a speed of 0.5 mm/min. Fracture load was recorded for each specimen. Data were collected and entered to the SPSS software and t-test was done. The average fracture load for Turkom-Cera was 1273 N and was 1079 N for In-Ceram Alumina. The maximum and minimum values for the first group was 2490, 530 N and for the second group was 1490, 714 N respectively. According to t-test results with P-value<0.05 there was no significant difference between the two groups. According to the close results for both groups, clinical performance of the Turkom-Cera ceramic copings would be similar to In-Ceram Alumina and a wide range of clinical use could be anticioated for this system
ABSTRACT
A female patient named Amany Yosef Abd El Hamed, aged 11 years, from Kafr Soltan, El Santa [El Gharbia]. She complained of recurrent attacks of carpopedal spasm for 3 yrs and every time the patient was admitted to hospital and received IV Ca without definitive diagnosis. The history is not significant with negative consanguinity and no similar condition. Pulse was 70 B/min, temperature 37 c, RR16- cycle/min, B/P 80/50, Wt. 35 kg, and Height was 145.5 cm. Shortening of the 4th and, 5th metacarpals, and no cataract. Serum. Ca level [ionized] was low [0.66 mmol/L], serum Ph level was high [7 mg/dl], serum alkaline phosphatase was high [130 u/L], serum parathormone was high [272.9 Pg/mL], and serum Mg was normal [2.3 mg/dl]. Ca in 24 h urine was normal. Renal functions tests and arterial blood gases were normal. TSH, freeT4, and free T3 were normal. Brain CT scans showed basal ganglia calcification. The girl was diagnosed as Pseudohypoparathyroidism type I a, [Albright Hereditary Osteodystrophy [AHO]]
Subject(s)
Humans , Female , Signs and Symptoms , Tomography, X-Ray Computed/methods , Neuroimaging/methods , HypocalcemiaABSTRACT
To study a new syndrome of congenital hypoparathyroidism, severe growth retardation and dysmorphic features in 8 Jordanian children, at King Hussein Medical Center Over the last 6 years, 8 children presented with hypocalcemic convulsions at age 4-8 weeks apart from one boy who was symptomatic at 6 years of age. All children were dysmorphic, and had severe growth retardation with time. Age ranged from 6 months to 12 years.The dysmorphic features were microcephaly, deep set eyes, peaked nose, thin upper lips, micrognathia, and large ear lobes Investigations showed hypoparathyroidism except in the eldest patient who had high PTH with hypocalcemia. Flow cytometry was done for four children and was normal. Echocardiogram was done to all children and found to be normal. All patients had hypercalciuria and renal ultrasound demonstrated nephrocalcinosis in 3 patients. Recognition of the dysmorphic features would allow earlier diagnosis and appropriate treatment