PURPOSE: The aim of this study was to evaluate biting force of patients with unilateral mandibular distal extension area treated with two different designs of the removable partial denture (RPD), conventional RPD, and new design of extracoronal castable precision attachment (OT Unilateral attachment). MATERIALS AND METHODS: This study was conducted on 16 patients with unilateral mandibular distal extension area with the second premolar is the last abutment teeth. The patients were divided into two equal groups, Group I received conventional RPD, which provides cross arch stabilization and a double Aker clasp was fabricated. Group II received new design of extracoronal castable precision attachment (OT Unilateral attachment). Evaluation of biting force by loadstar sensor, patients of both groups were evaluated at the time of prosthesis insertion, 3, 6, and 1 year later. Statistical analysis performing one-way analysis of variance followed by Tukey’s post hoc test to compare between all follow-up periods within each group, comparison between two groups regarding each follow-up period was performed by independent t-test. RESULTS: Both treatments yielded better after-treatment summary when compared with the baseline; however, better results were obtained and showed a statistically significant increase in Group II (OT unilateral design), especially after 3, 6 months, and 1 year later. CONCLUSION: From the results of this study, it was concluded that: It is preferable to use the new design of extracoronal castable precision attachment (OT unilateral) being simpler, more comfortable to the patients and give high masticatory efficiency in the form of biting force than conventional RPD.

Summary Thirty-nine hollow cylinders, made of five different concrete mixes, were tested under direct compression and torsion to study the failure of concrete under the ensuing biaxial state of stress. The results of these tests are compared with similar tests by other investigators and discussed in relation to various failure criteria.

The present study was undertaken to investigate the haemodynamics of the ovary and uterus in infertile mares using power and colour Doppler ultrasonography. Forty-seven Arabian mares were handled in the current work through several examinations. Based on the breeding history complaints, physical, vaginal examination and Doppler examination, 12 mares were found to be suffering from abnormal ovarian structures (Experiment I). In addition, nine mares with normal cyclic activity were kept as control. Another 16 mares were found to suffer from abnormal uterine conditions and 10 mares with normal uterine findings served as control (Experiment II). Blood flows to the anovulatory follicle, ovarian inactivity, granulosa cell tumour were compared to those to the dominant follicle and luteal blood flow. Uterine blood flow of cysts, abnormal uterine fluids (endometritis) during estrus and diestrus were compared to normal uterine vascularisation during estrus, diestrus and post-mating. Results showed that granulosa cell tumour had the highest red colour blood flow and total colour blood flow area. Blue colour blood flow area of the corpus luteum was higher compared to the dominant follicle and inactive ovary. Uteri with uterine cyst and abnormal uterine fluids during estrus of infertile mares had high red colour blood flow, blue colour blood flow and power blood flow areas compared to normal uterus during estrus. It could be concluded that Doppler ultrasound could distinguish between normal ovaries with normal or abnormal structures. Moreover, the increased uterine blood flow area of mares with abnormal fluids in their uteri (endometritis) and uterine cysts could be distinguished by comparison to the normal uterine blood flow during estrus.

Objective: This study compared and evaluated the effect of two different implant retained Mandibular Overdenture attachments on the biting force and occlusal force distribution. Materials and Methods: Fourteen completely edentulous male patients were selected and two implants were inserted for each patient. After 3 months of installation Patients were randomly divided into two equal groups: Group (I): Patients received conventional complete maxillary dentures opposed by Mandibular over dentures supported and retained by two conventional implants using ball attachment Group (II): Patients received conventional complete maxillary dentures opposed by Mandibular over dentures supported and retained by two conventional implants using locator attachment. Biting force was evaluated using I load star sensor. At time of prosthesis insertion, 3 months, 6 months, 9 months and 12 months. The T-Scan III digital occlusal system was used to record anterior and posterior percentage occlusal force (%OF) distribution. Results: The result was revealed that there was no statistically significant difference in biting force and occlusal force distribution between the two different attachments (locator attachment and ball attachment) in retained Mandibular Overdenture.

Objectives: The present study was conducted to investigate the retention and the patient satisfaction of the Thermoplastic Acetal resin distal extension partial denture prosthesis with different denture base extension length either extended to covered the retro molar pad or extended just at the anterior border of the retro molar pad in unmodified Kennedy class II mandibular cases. Thermoplastic Acetal resin partial denture is more comfortable and can replace any number of teeth in a dental arch. Methods: Total number of ten healthy patients with unmodified Kennedy class II mandibular cases were selected and received extra coronal attachment on the experimental side , and received unilateral partial denture with thermoplastic Acetal resin framework. The patients were grouped into two groups. Group I received mandibular unilateral distal(without denture base extension) just end at the anterior border of the retro molar padand group II received mandibular unilateral distal(with denture base extension) covered the retromolar pad. Then the retention evaluation and patient satisfaction was done at insertion of dentures , six months and after 12 month from the insertion. Results: For both groups regarding the retention evaluation, there was insignificant difference between both groups as P-value > 0.05. Regarding the patient satisfaction Group I (without denture base extension) showed statistically significantly higher mean satisfaction score than Group II. Conclusions: The patients were received mandibular unilateral distal(without denture base extension) more satisfied by the prosthesis. and regarding the retention there was non significant difference between both groups so theunilateral partial denture with thermoplastic Acetal resin framework without denture base extension more preferable .