External root morphology of maxillary first premolars in Kenyan Africans

Objective: To determine the external root morphology of the maxillary first premolars in Kenyan Africans.Design: In vitro descriptive cross-sectional study.Setting: School of Dental Sciences, University of Nairobi.Subjects: One hundred and fifty five extracted maxillary first premolar teeth obtained from patients aged between 13-30 years attending dental clinics within Nairobi.Main outcome measures: Number of roots, direction of root curvature and tooth length.Results: A total of 155 maxillary first premolars were studied, 77 from males and 78 from females. Overall, there were 83.2% two-rooted teeth (mean tooth length: buccal root 22.3 mm; lingual root 21.2 mm), 10.3% one-rooted (mean tooth length-22.6 mm) and 6.5% three-rooted. Three roots occurred more commonly in males than females and this was a statistically significant gender difference (P0.05).Conclusions: Maxillary first premolars were mostly two-rooted with straight roots. Males presented with two or three roots more often than females and had significantly larger mean tooth lengths

Internal root morphology in mandibular first permanent molars in a Kenyan population

Objective: To determine the internal root morphology and gender  variations in mandibular first permanent molars in a Kenyan population.Design: In vitro descriptive cross sectional study.Setting: School of Dental Sciences, University of NairobiResults: The mesial root of mandibular first molars had two canals in 96.3% of the teeth in both males and females and type IV canal configuration was most prevalent in the mesial root. The distal root of the mandibular first molar had one canal in 57.7% of the teeth in males and females. There were significant gender variations in the number of canals and canal configurations in the distal root. Two canals were more prevalent in females (53.6%) compared to males (30.4%) and a single canal was more frequent in males (69.6%) compared to females (46.4%) (P=0.001). Canal types I, II and IV were the most frequent in the mandibular distal root. The gender variation in the frequency of canal types I, II and IV in the distal root was statistically significant (P=0.001).Conclusion: Most of the mandibular first molars have three canals (56%). Two canals in the distal root are more frequent among females (53.6%) compared to males (30.4%)

ASSESSING DIFFERENTIAL GAINS THAT OUTSTANDING AND AVERAGE PERFORMING FARMERS ATTAIN FROM CLIMATE-SMART CASSAVA INNOVATIONS IN NYANDO CLIMATE-SMART VILLAGES, KENYA

In adoption of agricultural innovations, a few farmers attain outstanding outcomes above their peer majority. This reveals a positive deviance behavior in successful deployment of technologies and innovations. Assessing this behavior in climatesmart agriculture (CSA) can reveal the yield gap in triple wins of CSA (adaptation, farm productivity and mitigation). This study investigated differential gains in these CSA triple wins between outstanding (positive deviants) and average (typical) performing farmers who have adopted climate smart cassava innovations in Nyando Climate Smart Villages (CSV). In a household survey, a sample of 150 farmers were reached, which through snowballing approach, peers identified 30 to exhibit positive deviant behaviour. Presenting these in Focus Group Discussion (FGD) with stakeholders further isolated six farmers being those they consider positive deviants (PDs) in climate smart cassava innovations. Data were subjected to cross-tabulation to generate frequencies used to compute weighted index scores. This revealed increasing magnitude and was a preferred fair comparison of a sample of fewer positive deviants (n=6) with large number of typical (n=144) farmers. Results revealed substantial differences in the attained triple win gains from climate smart cassava innovations between typical and positive deviant farmers. The weighted index scores showed that positive deviant farmers had attained higher adaptability, production diversification, farm productivity and intensification, food security and were implementing more mitigation practices for climate change. This empirical evidence demonstrates potential gains from climate smart cassava innovations when deployed effectively. This is because innovative management practices distinguish positive deviant farmers from typical farmers. These typical farmers would benefit more by learning from positive deviant farmers about effective deployment of climate smart cassava innovations. The study recommends strengthening extension services linked to farmer platforms in order to grow capacity for more effective deployment of climate smart cassava innovations for realising the CSA triple wins