Effect of welding parameters on microstructure and mechanical properties of dissimilar AISI 304/ductile cast iron fusion welded joints.

Problems associated with dissimilar fusion welding are mainly originated from the differences in melting points, coefficients of thermal conductivity and thermal expansion, …etc., and carbon content when welding dissimilar ferrous materials. In this study, the problems associated with dissimilar fusion welding of stainless steel AISI304 with ductile cast iron DCI grade A536 were investigated.

Modeling of wear resistance for TC21 Ti-alloy using response surface methodology.

This study investigated the effect of heat treatment processes on the dry sliding wear resistance of the TC21 Ti-alloy at several levels of normal load and sliding speed. Response Surface Methodology (RSM) has been used as a design of the experiment procedure. OM and FESEM besides XRD analysis were used for results justification.

Treatment of Class III malocclusion using miniscrew-anchored inverted Forsus FRD: Controlled clinical trial.

Objectives:: To evaluate the skeletal, dental, and soft tissue changes after the use of miniscrew-anchored inverted Forsus fatigue-resistant device (FRD) in treatment of Class III malocclusion.

Materials And Methods:: In this controlled clinical trial, 16 patients (9 girls and 7 boys; age 12.45 ± 0.

Treatment outcomes of Class II malocclusion cases treated with miniscrew-anchored Forsus Fatigue Resistant Device: A randomized controlled trial.

Objective: To evaluate the skeletal, dental, and soft tissue effects of the Forsus Fatigue Resistant Device (FRD) used with miniscrew anchorage and compare them with those of the conventional Forsus FRD.

Materials And Methods: This study was carried out on 38 patients. These patients were randomly allocated into three groups.

Three-dimensional kinematic analysis of the second through fifth carpometacarpal joints.

The kinematics of the 2nd through 5th carpometacarpal (CMC) joints was investigated by using a 3-dimensional dynamic motion analysis system to delineate flexion-extension motion, radial-ulnar deviation, and pronation-supination motion. Analysis of the axes of rotation revealed that the axes of rotation for flexion-extension motion are located within the base of each respective metacarpal bone. The axis of rotation for radial-ulnar deviation passes through the distal carpal bone of each CMC joint except in the 3rd CMC joint where the axis of rotation is located within the base of the 3rd metacarpal.

A study of peristomal recurrence.

This is a retrospective and a prospective study of 435 laryngectomized patients at the department of Otolaryngology, Cairo University, between 1987 and 1997. The authors analyze the data of 26 patients who returned with peristomal recurrence. A statistical analysis was performed to determine the correlation between peristomal recurrence, and the site of the primary tumor, its stage, the presence of nodal metastases and the performance of an emergency tracheostomy more than 48 hours before surgery.

Rhabdomyosarcoma of head and neck in children.

Embryonal rhabdomyosarcoma is a rare condition that tends to occur in the head and neck in children. This disease carried a very poor prognosis until 10 years ago when a multidisciplinary approach (with surgery, therapy and multiple drug chemotherapy) was instituted. In this article a review of the literature on embryonal rhabdomyosarcoma is given and three rare cases have been reported; the first involved the palate, the second affected the ear and mastoid, and the third was a case originating in the nasopharynx with orbital involvement.

Leprosy of the upper respiratory tract. A clinical bacteriological, histopathological and histochemical study of twenty cases.

Twenty cases clinically diagnosed as leprosy were thoroughly examined for E.N.T.