Introduction: Ignoring the functional activity of boundary muscles in complete denture construction leads to loss of denture retention, stability and causes other problems and eventually leads to patient dissatisfaction. Recording the neutral zone and utilization it will prevent these problems. Neutral zone has been defined as a space of edentulous area in patient' s mouth where the force of the tongue pressing outward is neutralized by forces of the cheeks and lips pressing inward.Recording and utilization of Neutral zone is more important in formation denture polished surface contours and teeth orientation specially in patients with vigorously atrophic ridges, elderly patients and patients with decreased occlusal vertical dimension.Technique Introduction: In this study introducing the technique, neutral zone was recorded in a patient lack of muscle tonicity was recorded in maxillary and mandibular acrylic rims which had been made in both jaws special trays.Conclusion: After two weeks and two month follow-ups, the patient was satisfied with her prosthesis; so this technique seems to be an appropriate method for complete denture construction, especially in patients with lack of muscle tonicity.

introduction: The neutral zone is advised set the teeth in a denture, Although the crest of the being used for the mentiond purpose by the dentists.To compare these two patterns, 20 patients were Chosen; 6 Women with The average age of 51 and 14 men with the average age of 54.Materials and Methods: Like an ordinary case, a primary impression was taken, a special tray was made desiring a suitable wax rim. After border molding of the special tray, the final impression was taken.In the next stage the buccal and lingual surfaces of the Wax rime Were coated by alginate paste and placed into the patient's mouth to record the neutral zone. The patient was directed to move the related muscles into function.After casting the final impression, the buccal lingual surfaces of impression were also recorded by plaster.The midpoint of the center of the ridge and the center of the neutral zone were pointed and measured. After listing, the final result were observed:Results & Conclusion: 112 cases the midpoint zone lies on the lingual slope of the ridge and in buccal slope. In 18 cases There coincide on each other.

Prosthetic rehabilitation using complete dentures is quite a challenging task when accompanied by severely atrophic ridges. Various modifications are required in the treatment strategy to optimize the prognosis of the finished prosthesis. Moreover, the increased inter-arch space demands the hollowing of the maxillary denture to mitigate the issues in retention due to increased weight. This case report aims to demonstrate a technique used to fabricate a hollow maxillary denture and a mandibular denture using the neutral zone approach in the case of a severely atrophied ridge.

Background and Aim: We aim to build a classifier to distinguish between malaria-infected red blood cells (RBCs) and healthy cells using the two-dimensional (2D) microscopic images of RBCs. We demonstrate the process of cell segmentation and feature extraction from the 2D images. Methods and Materials: We describe an approach to address the problem using mixture discriminant analysis (MDA) on the 2D image profiles of the RBCs. The extracted features are used with Gaussian MDA to distinguish between healthy and malaria infected cells. We also use the neutral zone classifiers where ambiguous cases are identified separately by the classifier. Results: We compare the classification results from the regular classifiers such as linear discriminant analysis (LDA) or MDA and the methods where neutral zone classifiers are used. We see that including the neutral zone improves the classification results by controlling the false positive and false negatives. The number of misclassifications are seen to be lower than the case without neutral zone classifiers. Conclusion: This paper presents an alternative approach for classification by incorporating neutral zone classifier approach, where a prediction is not made for the ambiguous cases. From the data analysis we see that this approach based on neutral zone classifiers presents a useful alternative in classification problems for various applications.

In order to study biozones of the Pabdeh Formation in the Northeast Kazerun, Murdak section was selected. In this section, Pabdeh Formation is mainly consists of marl, shale and marly limestone. The study of calcareous nannofossils led to the recognition of 70 species and 28 genera. According to the first and last occurrence of index species and assemblages fossil, the following biozones based on global standard zonations are identified: Discoaster multiradiatus Zone (NP9/ CNP11), Tribrachiatus contortus Zone (NP10/ CNE1-CNE2), Discoaster binodosus Zone (NP11/ CNE3), Tribrachiatus orthostylus Zone (NP12/ CNE4), Discoaster lodoensis Zone (NP13/ CNE5), Discoaster sunlodoensis Zone (NP14/ CNE6-CNE8), Nannotetrina fulgens Zone (NP15/ CNE9-CNE11), Discoaster tanii nodifer Zone (NP16/ CNE12-CNE15), Discoaster saipanensis Zone (NP17/ CNE15-CNE16), Chiasmolithus oamaruensis Zone (NP18/ CNE17-CNE18), Isthmolithus recurvus Zone (NP19/ CNE18-CNE19), Sphenolithus pseudoradians Zone (NP20/ CNE20), Ericsonia Subdisticha Zone (NP21/ CNE21-CNO1), Helicosphaera reticulate Zone (NP22/ CNO2), Sphenolithus predistintus Zone (NP23/ CNO3-CNO4). As a result of this study and based on the obtained biozones, the age of Pabdeh Formation in Murdak section, is Late Paleocene (Thanetian) to Oligocene (Rupelian-Chatian).