Purpose – Force output is extremely important for electromagnetic linear machines. The purpose of this study is to explore new permanent magnet (PM) array and winding patterns to increase the magnetic flux density and thus to improve the force output of electromagnetic tubular linear machines. Design/methodology/approach – Based on investigations on various PM patterns, a novel dual Halbach PM ...

OBJECTIVE To assess the prevalence of dental caries and treatment needs of 12-year-old children living in Teheran and a rural area surrounding Esfahan. SUBJECTS AND METHODS A total of 1,102 pupils were examined clinically for caries according to WHO criteria. One calibrated dentist examined all children. RESULTS Of the children studied, 63.8% had sound permanent dentition, 9.9% had filled t...

The case histories of two brothers are presented in whom the majority of permanent teeth have failed to erupt. Defective enamel development is present in addition to other anomalies of the teeth and jaws. Neither boy had any concomitant systemic condition. There was no family history of these anomalies and a third brother had a normal dentition. The report describes the clinical course of this ...

BACKGROUND Oral health is crucial to individual growth and development. However, oral health care is often overlooked in children with special health care needs (CSHCN). We investigated current oral health status and unmet dental needs of CSHCN in Taiwan. METHODS We performed a retrospective study of consecutive CSHCN cases receiving first-time comprehensive dental treatment under general ane...

This study aimed to evaluate the scientific evidence regarding the effectiveness of silver diamine fluoride (SDF) in preventing and arresting caries in the primary dentition and permanent first molars. A systematic review (SR) was performed by 2 independent reviewers using 3 electronic databases (PubMed, ScienceDirect, and Scopus). The database search employed the following key words: "topical ...

AIM This was to investigate if the pattern of distribution of caries lesions detected by clinical and radiographic examinations at different diagnostic thresholds changed over a 3-year period during the course of eruption of the permanent dentition. It has been hypothesized that the contribution of bitewing radiography to caries detection in posterior teeth may increase when approximal contacts...

OBJECTIVE To determine the prevalence and severity of dental caries and to assess treatment needs among schoolchildren aged 6 and 12 in Blumenau, Brazil, and to compare the results found for private and public schools. METHODS A schoolchildren population of Blumenau, SC, Brazil, was studied. A random sample of 1,473 schoolchildren from Blumenau, Brazil, was obtained. Four strata were studied:...

OBJECTIVES This cross-sectional study was designed to determine the caries status and provide a general evaluation of the level of dental treatment need of Pennsylvania public school children in grades 1, 3, 9, and 11 on a statewide and regional basis. METHODS Between September 1998 and May 2000, caries status and treatment need were assessed using a school-based dental examination, performed...

This paper proposes a novel permanent magnet (PM) motor for high torque performance, in which hybrid PM material and asymmetric rotor design are applied. The hybrid PM material is adopted to reduce the consumption of rare-earth PM because ferrite PM is assisted to enhance the torque production. Meanwhile, the rotor structure is designed to be asymmetric by shifting the surface-insert PM (SPM), ...

dental anomalies are rare findings that may affect development of occlusion and early intervention may be required. here, a case of multiple anomalies in primary and perma nent dentitions is reported. the patient referred to the dental center with the chief complaint of multiple tooth decay. in the oral examination, the rare case of triplica tion between the right geminated man-dibular a and ri...