Informatics Publishing Limited

Gursharan Singh ¹, Nishtha Madan ¹, Mandeep Kumar ¹, Cherry Walia ², Opinder Pal Singh ¹

Affiliations
1 Department of Prosthodontics, Bhojia Dental College and Hospital, Distt. Solan, Himachal Pradesh, IN
2 Department of Oral Medicine, Bhojia Dental College and Hospital, Distt. Solan, Himachal Pradesh, IN

Abstract

Most patients are concerned about the anticipated length of service and reasons of replacement of fixed dental prostheses (FPDs). This study tried to find out relationship among various factors causing failures in fixed dental prostheses. Patients treated with fixed dental prostheses were examined clinically and radiographically. A group of 106 patients were evaluated for unsatisfactory restorations. These groups of patients produced records of initial treatment to ascertain the length of service of restoration. The mean survival period of fixed dental prostheses was 7.5 years. This investigation helped find causes for failures and survival period of various FPDs. Among the reasons of failures, caries was the most frequently observed (24.2%), followed by defective margin (18.2%), unsatisfactory esthetics (15.2%), retention problem (11.7%), periodontal disease (8.8%), fractured tooth (10.6%), periapical lesion (5.8%), porcelain fracture (4.2%) and others (1.3%). Causes of failures were also grouped into two groups (Mechanical&Oral diseases) for comparison. The Mechanical group showed higher failure percentage (59.9%) as compared to Oral diseases group (38.8%).

Keywords

Crowns, Dentures, Dental Prosthesis Failure.

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Monica Sharma ¹, Jagmohan Lal ¹, Ravneet Kaur ¹, Mandeep Kumar ¹, Bhavna Sharma ¹

Affiliations
1 Department of Prosthodontics, Bhojia Dental College and Hospital, Distt. Solan, Himachal Pradesh, IN

Abstract

A patient with malunited fracture of mandible require preprosthic reconstructive surgery followed by implant-assisted overdentures. In this case report, conventional complete dentures were fabricated for the patient as he refused any invasive treatment. The fabrication procedure of the denture was carefully modified according to anatomical and functional situation of the patient to achieve adequate retention and stability. Complete dentures thus fabricated provided comfort and sufficient function to the patient.

Keywords

Oral Preposthetic Surgery, Denture, Denture Stability.

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Mandeep Kumar ¹

Affiliations
1 Department of Information Technology, Ferozepur College of Engineering and Technology, IN

Abstract

The wireless LANs (WLANs) have become more prevalent and are widely deployed in many places such as corporate office Conference rooms, industrial warehouses, campus, residences, cafe etc. The IEEE 802.11-based WLAN presents new challenges for network administrators and information security administrators. The security of a WLAN is very important, especially for applications hosting valuable information.. This work critically reviews main security flaws of WEP, including short IV, key reuse, poor key management and suggests a new approach of automatic key management and refreshing of WEP key so that attacker could not have sufficient time to guess the key . By replacing the CRC32 With the MD5 Hash Function to enhance the Security of WLAN's and data integrity. In this current work we are implementing the MD5 Hash technique in the WEP and securing the data from the dictionary attack.

Keywords

WEP, CRC32, MD5, EAPOL, AODV, EED, PDF.

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Mandeep Kumar ¹, Ankur Gupta ¹, C. B. Majumder ¹

Affiliations
1 Department of Chemical Engineering, IIT Roorkee, Roorkee-247667, Uttarakhand, IN

Abstract

Sawdust is obtained from naturally and easily available which is biodegradable. The bio sorption capacity of the sawdust for hexavalent chromium was studied at different solution pH values (1.5-6), initial metal concentration (50-450 mg/L), adsorbent dose (1-7 g/L). The maximum adsorption of Cr (VI) is obtained at pH 1.5, initial concentration 50 ppm and adsorbent dose 5 g/l. The adsorption of chromium attained equilibrium at about 4 h, with maximum removal percent of 99.99% at initial metal concentration of 50 mg/L at optimum pH. The equilibrium data for the adsorption of Cr (VI) on sawdust is studied with various adsorption isotherm models such as Langmuir, Freundlich, and, Temkin. The equilibrium adsorption data is better fitted to Langmuir isotherm (R²=0.9938). Kinetic modeling is also studies for the adsorption of Cr (VI) on sawdust in which process follows the second-order kinetics and the corresponding rate constants are obtained.

Keywords

Saw Dust, Potassium Dichromate, 1, 5-Diphinylecarbazide, Hydrochloric Acid, Acetone, Sodium Chloride, Sulphuric Acid, and Ultra-Pure De-Ionized Water.

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