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Comprehensive management of malocclusion in maxillary fibrous dysplasia:A case report

World Journal of Clinical Cases 2021年第34期9卷 10671-10680页

作者： Harneet Kaur Sujata Mohanty Gulsheen Kaur kochhar Shahid Iqbal Anjali Verma Ritasha Bhasin anuraj singh kochhar Department of Orthodontics and Dentofacial Orthopaedics Faculty of DentistryJamia Millia IslamiaDelhi 110025DelhiIndia Department of Oral and Maxillofacial Surgery Maulana Azad Institute of Dental SciencesDelhi 110002DelhiIndia Department of Pediatric and Preventive Dentistry National Dental College and HospitalDerabassi 140507PunjabIndia Faculty of Dentistry Jamia Millia IslamiaDelhi 110025DelhiIndia Faculty of Dentistry University of TorontoToronto M5G1G6OntarioCanada Department of Orthodontics and Dentofacial Orthopaedics Faculty of DentistryUniversity of TorontoToronto M5G0C1OntarioCanada

BACKGROUND Fibrous dysplasia(FD)is a developmental hamartomatous bone disease characterized by a blend of fibrous and osseous *** rarely malignant,the tumor can vary from being small and asymptomatic,to a fairly large sized lesion,progressing gradually,compromising occlusion and facial *** approach depends on the stage of skeletal *** primarily involves surgical management for stabilizing the disease ***-surgical comprehensive dental treatment is necessary for restoring form and function of the jaws and *** article describes comprehensive orthodontic management of severe malocclusion in a surgically operated case of FD *** SUMMARY A 19-year female presented with a chief complaint of excessive gingival display when *** history included swelling of gums around the upper right front teeth,diagnosed at the age of 15 as FD of the right anterior maxillary segment and treated with surgical recontouring of the dysplastic *** clinical and radiological examinations showed adequate post-surgical *** surgically treated dysplastic area presented with right canting of the maxillary anterior occlusal *** maxillary teeth were torqued palatally,with the root of the right maxillary canine exposed *** discuss sequential management of the associated malocclusion with comprehensive fixed orthodontics,along with special precautions taken to prevent reactivation of the quiescent and healed *** The adequate healing of fibro-dysplastic bone post-surgery must be allowed before initiating orthodontic tooth movement in the dysplastic *** follow-ups are needed to monitor stability of occlusion and any relapse of the lesion.

关键词： Craniofacial fibrous dysplasia Malocclusion Orthodontic tooth movement Jaw surgery Case report

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Cone beam computed tomographic evaluation of pharyngeal airway in North Indian children with different skeletal patterns

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World Journal of Radiology 2021年第2期13卷 40-52页

作者： anuraj singh kochhar Maninder singh Sidhu Ritasha Bhasin Gulsheen Kaur kochhar Himanshu Dadlani Jagpreet Sandhu Bobby Virk Former Orthodontist Max HospitalGurgaon 122001India Department of Orthodontics Faculty of Dental SciencesSGT UniversityGurugram 122001India Faculty of Dentistry University of TorontoToronto M5G 1G6Canada Department of Pediatric and Preventive Dentistry National Dental College and HospitalDerabassi 140507PunjabIndia Department of Periodontology Kalka Dental CollegeUttar Pradesh 210507India Senior Consultant Department of Dental SurgeryMax HospitalGurgaon 122001Indi Formerly at Department of Orthodontics Genesis Institute of Dental SciencesPunjab 152001India Chief Orthodontist Smile With BracesPuyallupWA 98371United States

BACKGROUND In growing patients with skeletal discrepancies,early assessment of functional factors can be vital for the restoration of normal craniofacial *** To compare airway volumes in patients with mandibular retrognathism with the normal anteroposterior skeletal relationship,thereby assessing the association between cephalometric variables and airway *** Cone-beam computed tomography volume scans,and lateral cephalograms,3-dimensional airway volume and cross-sectional areas of 120 healthy children(54 boys and 66 girls mean age 15.19±1.28)which were done for orthodontic assessment were *** subjects were divided into 2 groups based on the angle formed between point A,Nasion and point B(ANB)values and cephalometric variables(such as anterior and posterior facial height,gonial angle etc.)airway volumes,and cross-sectional measurements were compared using independent t ***’s correlation coefficient test was used to detect any relationship of different parts of the airway and between airway volume and 2-dimensional cephalometric *** Means and standard deviations for cephalometric,cross-sectional,and volumetric variables were ***,mandibular body length and facial convexity were statistically highly significant(P<0.01)whereas condylion to point A,nasal airway and total airway volume(P<0.05)were statistically *** nasal airway volume and the superior pharyngeal airway volume had a positive correlation(P<0.01),nasal airway was correlated to middle(P<0.05)and total airway superior had a relation with middle(P<0.05),inferior and total airway(P<0.05),middle was related to all other airways;inferior was also related to all the airways except *** cephalometric values were positively correlated with the airway volume with Frankfurt Mandibular Plane Angle and facial convexity showed significant correlations with total airway volume(P<0.05).Additionally,ANB angle was significantly correlated wit

关键词： Pharyngeal airway Cone beam computed tomography Skeletal pattern Malocclusion Retrognathic Airway volume

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Codimension-2 bifurcation in a discrete predator-prey system with constant yield predator harvesting

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生物数学学报:英文版 2023年第5期16卷 165-191页

作者： anuraj singh Vijay Shankar Sharma ABV-Indian Institute of Information Technology and Management Gwalior Madhya PradeshIndia

This work investigates the bifurcation analysis in a discrete-time Leslie-Gower predatorprey model with constant yield predator *** stability analysis for the fixed points of the discretized model is shown *** this study,the model undergoes codimension-1 bifurcation such as fold bifurcation(limit point),flip bifurcation(perioddoubling)and Neimark-Sacker bifurcation at a positive fixed ***,the model exhibits codimension-2 bifurcations,including Bogdanov-Takens bifurcation and generalized fip bifurcation at the fixed *** each bifurcation,by using the critical normal form coefficient method,various critical states are *** validate our analytical findings,the bifurcation curves of fixed points are drawn by using *** system exhibits interesting rich dynamics including limit cycles and ***,it has been shown that the predator harvesting may control the chaos in the system.

关键词： Flip bifurcation Neimark-Sacker bifurcation generalized fip bifurcation Bogdanov-Takens bifurcation harvesting

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Hopf bifurcation and chaos in a Leslie–Gower prey–predator model with discrete delays

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International Journal of Biomathematics 2020年第6期13卷 135-161页

作者： anuraj singh Preeti Pradeep Malik ABV-Indian Institute of Information Technology and Management Gwalior M.P.India Department of Mathematics University of Petroleum Energy Studies DehradunUttarakhandIndia

In this work,a Leslie–Gower prey-predator model with two discrete delays has been *** positivity,boundedness and persistence of the delayed system have been *** system exhibits the phenomenon of Hopf bifurcation with respect to both *** conditions for occurrence of Hopf bifurcation are obtained for different combinations of *** is shown that delay induces the complexity in the system and brings the periodic oscillations,quasi-periodic oscillations and *** properties of periodic solution have been determined using central manifold and normal form ***,the global stability of the system has been established for different cases of discrete *** numerical computation has also been performed to verify analytical results.

关键词： Discrete delays limit cycle global stability Hopf bifurcation chaotic behavior

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EFFECTS OF DELAY AND SEASONALITY ON TOXIN PRODUCING PHYTOPLANKTON-ZOOPLANKTON SYSTEM

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International Journal of Biomathematics 2012年第5期5卷 239-259页

作者： SUNITA GAKKHAR anuraj singh BRAHAM PAL singh Department of MathematicsIndian Institute of Technology Roorkee Roorkee 247667 Uttarakhand India Department of Mathematics J. V. Jain Degree CollegeSaharanpur 2~001 U.P. India

A dynamical model for toxin producing phytoplankton and zooplankton has been formulated and analyzed. Due to gestation of prey, a discrete time delay is incorporated in the predator dynamics. The stability of the delay model is discussed and Hopf bifurcation to a periodic orbit is established. Stability and direction of bifurcating periodic orbits are investigated using normal form theory and center manifold arguments. Global existence of periodic orbits is also established. To substantiate analytical findings, numerical simulations are performed. The system shows rich dynamic behavior including chaos and limit cycles. The influence of seasonality in intrinsic growth parameter of the phytoplankton population is also investigated. Seasonality leads to complexity in the system.

关键词：季节性因素浮游植物浮游动物时间延迟系统毒素生产周期轨道

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