Top Quark and Higgs Boson Masses in Supersymmetric Models

We study the implications for bounds on the top quark pole mass m_t in models with low scale supersymmetry following the discovery of the Standard Model-like Higgs boson. In the minimal supersymmetric standard model, we find that m_t >= 164 GeV, if the light CP even Higgs boson mass m_h = 125 +-2 GeV. We also explore the top quark and Higgs boson masses in two classes of supersymmetric SO(10) models with t-b-tau Yukawa coupling unification at M_GUT. In particular, assuming SO(10) compatible non-universal gaugino masses, setting m_h = 125 GeV and requiring 5% or better Yukawa unification, we obtain the result 172 GeV <= m_t <= 175 GeV. Conversely, demanding 5% or better t-b-tau Yukawa unification and setting m_t=173.2 GeV, the Higgs boson mass is predicted to lie in the range 122 GeV <= m_h <= 126 GeV.Comment: 16 pages, 7 figure

Evaluation of the root and canal morphology of mandibular first permanent molars in a sample of Pakistani population by cone-beam computed tomography

Objective: To evaluate the root canal morphology of permanent mandibular first molars using Cone Beam Computed Tomography. Methods: The retrospective study was done at Aga Khan University Hospital, Karachi, and comprised medical records of patients who visited the dental clinics from December 2016 to March 2017. Mandibular first permanent molars were evaluated on Cone Beam Computed Tomography images. Frequency distribution of Vertucci\u27s classification was determined, and so was the association between Vertucci\u27s classifications and gender. SPSS 20 was used for data analysis. Results: A total of 142 mandibular first permanent molars were evaluated on 78 Cone Beam Computed Tomography images. The most common Vertucci\u27s classification was Type IV for mesial root 86(60.56%) and Type I for distal root 63(44%). There was no difference in the two genders for root canal morphology (p\u3e0.05). Conclusions: Type IV Vertucci\u27s were prevalent in the mesial root and Type I were common in the distal root of permanent mandibular first molars

Leaking pseudoaneurysm of hepatic artery: A potentially life-threatening complication of a common procedure

We report a case of leaking pseudoaneurysm of right hepatic artery in a 54-year old female after laparoscopic cholecystectomy who presented with massive gastrointestinal haemorrhage and was successfully managed with angiography and coil embolization

Aesthetic rehabilitation in a patient with skeletal mandibular deficiency and open bite: Journey from splinted metalloceramic prosthesis to all-ceramic crowns

This case report is of a 31-year-old female who presented with splinted and faulty metalloceramic prosthesis on maxillary anterior teeth, which was responsible for localised periodontal disease and poor aesthetics. At multiple sites the ceramic had chipped off and the prosthesis colour did not match with the adjacent healthy teeth. A multidisciplinary approach of endodontics, periodontics and prosthodontics was employed for this case. The treatment plan consisted of removing the faulty prosthesis, endodontic retreatment of inadequately root-treated teeth and endodontics in the other coronally prepared abutment teeth. Crown lengthening surgery was performed for the correction of periodontal pockets and high smile line and maintenance of an adequate biological width. After periodontal healing, all-ceramic individual crowns were placed on the maxillary anterior teeth along with a three-unit all-ceramic bridge for the replacement of the left upper maxillary first premolar. The final results were aesthetically pleasing with good marginal fit. The patient was extremely satisfied with the outcome as all her concerns were addressed. It is, therefore, advisable to consider placing individual crowns rather than multiunit splinted prosthesis whenever possible

USE OF DIAGRAMS AS INSTRUCTIONAL AIDS IN TEACHING OF GEOMETRICAL CONCEPTS AT SECONDARY SCHOOL LEVEL

Angle is a complex topic defined in a variety of contexts; some define angle to be as a pair of rays coming from a single point, as a rotation about a single point, or in a curve. Due to the multiple definitions of angle students get confused as to what an angle truly consists of. This study paid close attention to the misconceptions high school geometry students’ hold about the concept of angle and how to help them gain a more conceptual understanding of this essential concept with the use of different Diagrams. The main idea behind the conduction of this study is to investigate the effect of use of diagrams as instructional aids on the conceptual understanding of angles. The study hypothesizes that angle can be learned using interactive Diagrams. The results of this study showed that diagrams which based on different A.V aids was shown to be more beneficial for the students who used to clear the concept of angles

In vitro assessment of the accuracy of extraoral periapical radiography in root length determination

Objective: To determine the accuracy of extra oral periapical radiography in obtaining root length by comparing it with the radiographs obtained from standard intraoral approach and extended distance intraoral approach.MATERIALS AND Methods: It was an in vitro, comparative study conducted at the dental clinics of Aga Khan University Hospital. ERC exemption was obtained for this work, ref number 3407Sur-ERC-14. We included premolars and molars of a standard phantom head mounted with metal and radiopaque teeth. Radiation was exposed using three radiographic approaches: Standard intraoral, extended length intraoral and extraoral. Since, the unit of analysis was individual root, thus, we had a total of 24 images. The images were stored in VixWin software. The length of the roots was determined using the scale function of the measuring tool inbuilt in the software. Data were analyzed using SPSS version 19.0 and GraphPad software. Pearson correlation coefficient and Bland-Altman test was applied to determine whether the tooth length readings obtained from three different approaches were correlated. P = 0.05 was taken as statistically significant.Results: The correlation between standard intraoral and extended intraoral was 0.97; the correlation between standard intraoral and extraoral method was 0.82 while the correlation between extended intraoral and extraoral was 0.76. The results of Bland-Altman test showed that the average discrepancy between these methods is not large enough to be considered as significant.CONCLUSIONS: It appears that the extraoral radiographic method can be used in root length determination in subjects where intraoral radiography is not possible

Evaluation of root morphology and canal configuration of maxillary premolars in a sample of Pakistani population by using cone beam computed tomography

Objectives: To evaluate the root canal morphology of maxillary premolars. Method: This retrospective study was conducted from November 2016 to January 2017 at Aga Khan University Hospital, Karachi, and reviewed Cone Beam Computed Tomography images of maxillary first and second premolars done from November 2014 to October 2016. Frequency distribution of Vertucci\u27s classification was determined. Chi square test was applied to determine any association between Vertucci\u27s type and gender. SPSS 19 was used for data analysis. Results: Of the 114 first premolars, 74(68.6%) were bi-rooted and 36(31.5%) were single-rooted. The mean lengths of buccal and palatal roots were 20.6 ±1.7mm and 19.5±2.0 mm, respectively. The most common canal morphology reported for maxillary first premolars was type I 127(68%) followed by type II 24(12.9%). Of the 115 maxillary second premolars, 97(84%) were single-rooted. The mean lengths of buccal and palatal root were 20.7±1.6mm and 19.0±1.45mm, respectively. The most common canal morphology reported for second premolars was type I 71(53.4%) followed by type II 18(13.5%). Conclusion: Vertucci\u27s type I was the most common canal configuration for maxillary first and second premolars and there was no gender-based difference for root canal morphology of maxillary premolar