Hegel’s Philosophy of History-A Challenge to the African Thinker: The Thought of Leopold Sedar Senghor

Philosophy of History, as an academic discipline, challenges the choices that we make, motivated by our respective historical circumstances. Hegel considers Africa as an unhistorical continent, whose inhabitants can only be equated to animals or worthless article, bound to remain in slavery and in subhuman conditions. On the other hand, Léopold Sedar Senghor, in his Négritude ideology, portrays the values embedded in the African cultural and traditional practices. The intellectual aptness of the Africans, in this work is manifested in the very ideas of Senghor which we are using to contest those of Hegel. Some call Hegel a racist, others say he was driven by ignorance. Amidst such a debate, we call on our readers not to be insensitive to the socio-political and infrastructural deficiencies in Africa, in terms of economic and political instability, corruption, poverty illiteracy and disease. Can the extremes of such deficiencies justify the Hegelian claims concerning Africa? Who may be blamed for the predicaments of Africa; God, as Hegel seems to insinuate or the western world or the Africans themselves? As we endeavor to answer these questions, we are also positing our own solutions that can enable Africa to emerge

Relationship between obesity and oral diseases

Objective: The aim of this study was to determine the relationship between obesity and periodontal status and dental caries experience of a group of Nigerian dental patients.Materials and Methods: Participants were selected from patients attending dental outpatient clinics of the University of Benin Teaching Hospital, Benin City, Nigeria. Their weight and height were measured and body mass index (BMI) estimated in kg/m2, gingival health assessed using bleeding on probing index, oral hygiene estimated using the simplified oral hygiene index (OHI‑S), periodontal health estimated using the basic periodontal examination (BPE) and caries experience was estimated with the decayed, missing, and filled teeth (DMFT) index.Results: A few participants (3.8%) were underweight, 52.6% fell within the normal BMI range, 28.2% preobese, 12.2% obese class I and 3.2% obese class II. The mean OHI‑S score was 2.16 ± 1.13 among the overweight participants and 2.05 ± 1.13 among those who are not (P = 0.543). The mean DMFT score was 3.03 ± 4.25 among the overweight participants and 2.32 ± 3.01 among those who are not (P = 0.223). Sixty‑five percent of participants with BPE score of 0, considered to signify periodontal health, had normal BMI while all the participants with the worst BPE score recorded belong to the obese 1 group (P = 0.070). The binary logistic regression revealed that the likely predictor of gingival bleeding in the study is BMI between 35.0 and 39.9 (obese class 2) (P = 0.046, odds ratio = 0.07, 95% confidence interval = 0.01-0.96).Conclusion: It can be concluded from this study that there is no statistically significant relationship between obesity and periodontal status and dental caries experience in the studied group of dental patients. Increased BMI may however be a predictor of gingival bleeding.Keywords: Dental caries, obesity, periodontal diseas

Perception of HIV/AIDS among preclinical dental students

Objective. To determine the knowledge, attitude and willingness of preclinical dental students to treat HIV/AIDS patients in the future. Method. The sample comprised 150 students of both genders drawn from the third and fourth year dental students of the University of Benin, Benin City. One hundred and fifty questionnaires were self-administered, with 139 (92.6%) retrieval. The parameters measured were knowledge, status, immunization against hepatitis B virus, willingness to treat, knowledge of post exposure prophylaxis (PEP) and its protocol in the of University of Benin Teaching hospital (UBTH). Results. Data analysis showed that 100 (71.9%) students rated their knowledge of HIV/AIDS as high and very high. Sixty-three (45.3%) students thought that HIV was a contagious disease while 46 (33.1%) felt HIV was more infectious than tuberculosis or any of the strains of hepatitis virus. Only 59 (42.4%) students knew their HIV status. One hundred and twenty seven (91.4%) students felt that professional oral health care will be beneficial to HIV/AIDS patients; while fifty-one students (36.7%) are not prepared to administer dental care to HIV/AIDS patients in future. Majority of respondents adjudged health workers to be more at risk than sex workers. Forty students comprising 28.8% of the study population had been immunized against Hepatitis B. Ninety- four (67.7%) students had no knowledge of PEP while 122 (87.8%) students did not know the PEP protocol in UBTH. Conclusion. Although a large number of these students claim to be knowledgeable about HIV/AIDS. It is obvious that a true understanding is lacking. Concerted effort should be made to change their perception by implementing a curriculum designed to enhance the knowledge of dental students; if we hope to save HIV/AIDS patients from the discrimination of future healthcare givers

Ameloblastomatous change in radicular cyst of the jaw in a Nigerian population

Objective: To determine the incidence, age, gender, jaw-sites and subtypes of radicular cyst, and to determine the incidence of ameloblastomatous change in radicular cyst in a Nigerian population.Method: A 10-year retrospective analysis of all diagnosed orofacial lesions in the Department of Oral Pathology and Medicine, University of Benin Teaching Hospital, Benin City, Nigeria.Results: From the 785 diagnosed orofacial lesions within the study period; there were 54 (6.9%) cases of radicular cysts of the jaws. The peak age group was the 3rd decade (n=23, 42.6%) with a mean age of 31+ 1.7 years. There were 29 (53.7%) males and 25 (46.3%) females, giving a ratio of 1.2:1. The mandible was the commonest jaw-site (n=32, 59.3%). There were 12 (22.2%) cases of periapical cyst which were significantly associated with anterior maxillary site (n=8, 14.8%) [p=0.001]. Seven (13.0%) cases of cystic ameloblastoma were diagnosed among the radicular cysts, with a predilection of the lesions for 3rd and 4th decades of life (n=6, 11.1%), and posterior mandible (n=5, 9.3%).Conclusion: This study showed a low incidence of radicular cyst of the jaw among orofacial lesions and a relatively higher incidence of ameloblastomatous change in radicular cyst compared to previous reports. Immuno-histochemical examination is recommended to differentiate radicular cyst with ameloblastomatous like change from cystic ameloblastoma arising from radicular cyst.Keywords: Radicular cyst, Inflammation, Ameloblastomatous change, Immunohistochemistry, Jaw lesio

COVID – 19 Pandemic: The Implications for the Practice of Restorative Dentistry

Objective: To assess the implication of COVID-19 pandemic on the practice of restorative dentistry in Nigeria.Materials and Methods: A cross-sectional study regarding the impact of COVID-19 on restorative dental practice was carried out among dentists across different cadres working in either private or public practice. Data was obtained using an online survey questionnaire regarding the infection control practice, availability and use of personal protective equipment, practice modifications to combat COVID-19 outbreak and the impact of COVID-19. Data was analysed using the chi-square test and p-value <0.05 was considered statistically significant.Results: Amongst 137 dentists that participated in the study, majority of respondents were males (58.4%), a greater proportion (49.6%) were in the age range 35-44 years and 78.1% worked in public hospitals. A significantly higher number of male respondents (p=0.019) and public dental workers (p=0.036) immediately changed their mode of dental service delivery following the COVID-19 outbreak. Majority of respondents (60.6%) carried out restorative dental procedures despite the pandemic; most of these procedures being emergency dental treatment and non-aerosol generating dental procedures. About half of respondents had respiratory masks (51.8%) and isolation gowns (54.0%) available. Majority reported that the pandemic had decreased patient flow (88.3%), increased treatment fee (53.3%) and had an impact on the income generated (92%). Only 20.4% of respondents hadproblems with their staff; the problems being emotional problems, work abandonment and demand of salary increase. The pandemic has had a negative impact on most respondents (74.5%) and only 31.4% respondents were optimally prepared to render dental services.Conclusion: COVID-19 pandemic has changed the mode of restorative dental practice in Nigeria; resulting in a psychological impact on dentists and a financial burden on dental practice. &nbsp

Filling the Gaps to Solve the Extensin Puzzle

Extensins (EXTs) are highly repetitive plant O-glycoproteins that require several post-translational modifications (PTMs) to become functional in plant cell walls. First, they are hydroxylated on contiguous proline residues; then they are O-glycosylated on hydroxyproline and serine. After secretion into the apoplast, O-glycosylated EXTs form a tridimensional network organized by inter- and intra-Tyr linkages. Recent studies have made significant progress in the identification of the enzymatic machinery required to process EXTs, which includes prolyl 4-hydroxylases, glycosyltransferases, papain-type cysteine endopeptidases, and peroxidases. EXTs are abundant in plant tissues and are particularly important in rapidly expanding root hairs and pollen tubes, which grow in a polar manner. Small changes in EXT PTMs affect fast-growing cells, although the molecular mechanisms underlying this regulation are unknown. In this review, we highlight recent advances in our understanding of EXT modifications throughout the secretory pathway, EXT assembly in cell walls, and possible sensing mechanisms involving the Catharanthus roseus cell surface sensor receptor-like kinases located at the interface between the apoplast and the cytoplasmic side of the plasma membrane. This review describes recent progress in our understanding of extensin post-translational modifications throughout the secretory pathway, extensin secretion and assembly in the cell walls, and possible sensing mechanisms at the interface between the apoplast and the cytoplasmic side of the cell surface.Fil: Marzol, Eliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; ArgentinaFil: Borassi, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; ArgentinaFil: Bringas, Mauro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Sede, Ana Rocío. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; ArgentinaFil: Rodríguez Garcia, Diana Rosa. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; ArgentinaFil: Capece, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Estevez, Jose Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; Argentin

Preliminary analysis of genetic variation of Escallonia alpina and E. rubra

Escallonia alpina y E. rubra (Escalloniaceae) comparten su área de distribución en el sur de los Andes y se diferencian por pocos caracteres morfológicos diagnósticos, tales como la disposición de las flores y la presencia y tipo de glándulas; sin embargo, en algunas poblaciones no es posible asignar los individuos a una u otra especie. Además, se han reconocido y descrito como híbridos varias formas de transición entre ambas. El objetivo de este trabajo es examinar la variabilidad genética poblacional de Escallonia alpina y E. rubra, y analizar si se corresponde con la variabilidad morfológica observada. Se estudió la morfología en 39 individuos de cinco poblaciones sobre los que también se realizó un análisis de AFLP. Se investigó la relación entre los individuos mediante análisis de ordenación, agrupamiento y de asignación bayesiana. Además se calcularon índices de diversidad y se realizó una prueba de Mantel. A partir del análisis morfológico, se asignaron dos poblaciones a cada especie, mientras que una población con individuos con morfología intermedia no se pudo asignar unívocamente a ninguna de las dos especies. Se observó una fuerte correspondencia entre las especies delimitadas mediante caracteres morfológicos diagnósticos tradicionales y el patrón de AFLP. La evidencia morfológica y molecular preliminar nos permitió reconocer a Escallonia alpina y E. rubra como dos especies distintas, y a una población con caracteres morfológicos y genéticos intermedios que podrían ser el resultado de flujo génico interespecífico o de una separación incompleta de linajes.Escallonia alpina and E. rubra (Escalloniaceae) are distributed in the same geographical region in the southern Andes; they are differentiated by few diagnostic morphological characters such as flower arrangement, and type and presence of glands. A morphological gap between both species is absent in some populations; in addition, intermediate forms have been recognized and described as hybrids. The aim of this work is to examine the genetic variation in populations of Escallonia alpina and E. rubra, and to analyze if there is a correspondence between genetic and morphological variability. We studied the morphology of 39 individuals belonging to five populations, which were also used to perform an AFLP analysis. We conducted ordination, clustering and Bayesian assignment analyses to investigate the relationship among individuals, and we calculated genetic diversity indices and a Mantel test. As a result of the morphological analysis, two populations were assigned to each species, while the remaining population could not be assigned unequivocally to any of the two species, as the individuals exhibited an intermediate morphology. A strong correspondence between traditional morphological characters and the AFLP pattern was observed. Our preliminary morphological and molecular evidence support Escallonia alpina and E. rubra as two distinct species. The variability found in the intermediate population might be the result of inter-specific hybridization or incomplete lineage sorting.Fil: Morello, Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion (i); Argentina;Fil: Giussani, Liliana Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion (i); Argentina;Fil: Sede, Silvana Mabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion (i); Argentina

SISTEM PENDUKUNG KEPUTUSAN PENENTUAN GURU BERPRESTASI MENGGUNAKAN METODE TOPSIS (STUDI KASUS: DINAS PPO KAB. TTU)

This study aims to assist human work in knowing the decision support system for determining outstanding teachers using the topsis method using the Multi Attribute Decision Making (MADM) decision making method which is used to evaluate or select several alternatives as a decision support system using one method, namely the The trick for order preference by similarity to ideal solution (TOPSIS). This method is widely used to solve practical decision-making. This is because the concept is simple and easy to understand, computation is efficient, and has the ability to measure the relative performance of decision alternatives. There are 5 criteria used in determining outstanding teachers, namely pedagogic, personality, professional, social and innovation. From the results of calculations using the cicue for order preference by similarity to ideal solution (TOPSIS) method, the teacher who was selected as an outstanding teacher was Elisabeth Abi S.PD SD with a score of 0.825. Thecnicue for order preference by similarity to ideal solution (TOPSIS) method makes it easy to determine outstanding teachers at the youth and sports education office at TTU, this is web-based and uses the PHP programming language