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This experiment was conducted to evaluate the effect of strain and sex on productive performance, slaughter traits of chickens and the effect of strain on some productive as well as some reproductive traits of local improved dual purpose. A total of 1951 one day old chicks of three Canadian strains (Shaver A,B and C) and two Egyptian chicken strain (El-Salam and Mandarah). Productive performance measured from one day to 65 weeks of age and slaughter traits were recorded for cocks at 12 weeks of age. Results revealed that strain effect was clear for Shaver C strain for body weight, weight gain, feed consumption. In addition Shaver C had better feed conversion, dressing, fleshing, liver, glycogen, tenderness percentages but recorded the highest percentages for abdominal and total fat content as well as lowest testicular weight of cocks . Shaver B showed higher percentages for blood loss, feather, bones and spleen percentages, but Shaver A showed the highest percentages for PH content, ashes and water holding capacity. Sex effect showed superiority of males over females for body weight allover study periods, weight gain and feed consumption, while viability in growing period were recorded for Egyptian chickens. Strain effect was evident for shaver C strain for body weight, feed consumption and egg weight ( at sexual maturity, at first 90 days of egg production, 42 and 65 weeks of age). While strain effect for fertility, hatchability and scientific hatchability, age at sexual maturity, Egg number at first 90 days of egg production, egg number at 42 and 65 weeks of age, egg quality were recorded for Egyptian chickens. Moreover, negative correlation estimates were observed between age at sexual maturity and egg number at different periods as well as positive correlation between body weight at all period ages, and most of productive traits that of high great benefits to select for economic traits in chickens at earlier age.From the above results we can conclude that Canadian Shaver C strain recorded the best results for most productive traits, while Egyptian strains (EL-Salam and Mandarah) recorded the best results for reproductive traits as well as egg numbers at first 90 days of egg production, 42, and 65 weeks of age. egg mass at first 90 days of egg production, fertility and hatchability percentages , viability, egg quality. And local developed Egyptian environs mental conditions from other foreign breeds.

Objective The aim of the study is patients’ satisfaction evaluation and radiographic evaluation of the terminal abutments of attachment-retained maxillary obturators with metal framework versus milled polyetheretherketone (PEEK) framework in the management of maxillectomy cases. Materials and Methods Eighteen participants were randomly divided into three parallel groups (n = 6). Participants of the PEEK group received attachment-retained obturators with milled PEEK framework, the metal group received an attachment-retained obturator with a metallic framework, and the conventional group received conventional clasp-retained obturators with a metallic framework (Control group). The evaluation included was radiographic evaluation and patients’ satisfaction in this study included two scales—”The Obturator Functioning Scale” and “The European Organization for Research and Treatment of Cancer Head and Neck 35” using one-way ANOVA test. Results Both PEEK and metal groups showed a statistically significant lower mean bone loss (p <0.050) compared with the conventional group during all follow-up periods. There is no statistically significant difference between the PEEK and metal groups during all follow-up periods. Regarding patient satisfaction, both the PEEK and metal groups showed a statistically significant decrease score (p <0.050) compared with the conventional group in various aspects of patients’ satisfaction scales as satisfaction with the look and difficulty of talking to the public, and noticeable clasps. In comparison, the PEEK group showed a statistically significant decrease score (p <0.050) than the metal group with respect to satisfaction with the look along all follow-up periods. Conclusions PEEK attachment-retained maxillary definitive obturators could be considered a promising treatment modality for patients with acquired maxillary defects with regard to esthetics and satisfaction.

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