The capability and accuracy of the CEREC CAD/CAM system to fabricate custom posts by direct scanning of simulated canal blocks in vitro

Dentists have been using CAD/CAM technology to fabricate custom posts and cores. However, most of these cases used impression material as a way to indirectly scan the canal. The aim of this study was to evaluate the capability of CEREC CAM/CAM machine to directly scan simulated canal blocks without an impression and which of the following factors affected the accuracy of fit; taper, length and tip diameter. Material and methods: 32 epoxy resin blocks with post space simulator were made from metal post templates to resemble post space preparations. Three factors were considered in-group variations; length of the post, taper and diameter of the post’s tip. Eight groups of four specimens each were milled from acrylic blocks using the CEREC CAD/CAM system and one extra group of one specimen each was for cast post fabrication. Group A (Length = 8mm, taper = 4o, tip diameter = 0.8mm), Group B (Length = 8mm, taper = 4o, tip diameter = 1 mm), Grope C (Length = 8mm, taper = 6o, tip diameter = 0.8mm), Group D (Length = 8mm, taper = 6o, tip diameter = 1 mm), Group E (Length = 10 mm, taper = 4o, tip diameter = 0.8mm), Group F (Length = 10 mm, taper = 4o, tip diameter = 1 mm), Grope G (Length = 10mm, taper = 6o, tip diameter = 0.8mm), Group H (Length = 10mm, taper = 6o, tip diameter = 1mm). Each block, with its cemented post was sectioned in a coronal-apical direction. An image was recorded for each slice. Cement thicknesses were measured in four areas. The results showed that group E and D have the smallest cement thickness with 84 and 89 microns respectively. Both groups shared a tip diameter of 1mm. This result is within the clinically acceptable limit of the cement layer around the posts and is comparable to the cast group in our study. Tip diameter and length significantly affected the cement thickness in an inverse relationship

The Effect of Distributed Generation on Distributed Network

The work has a practical model which is feasible and applicable in King Abdulaziz University Hospital KAUH Intensive Care Unit ICU that consists of 9-bus system. Because of solar energy generation is a part of distributed generation; the solar PV was represented as distributed generators. The research focus on applying power flow method on 9 bus network. The power flow was studied with/without added distributed generators (DGs). Keywords: Distributed Generators DGs, Distributed netowrk, Power Flow, Voltage Profile, Power Losses

Retrospective Radiographic Survey of Unconventional Ectopic Impacted Teeth in Al-Madinah Al-Munawwarah, Saudi Arabia

OBJECTIVES: Ectopic unconventional impacted teeth are rare. These teeth erupt in an unusual direction with limited unconventional access and have increased surgical risks. AIM: This study aimed to investigate and assess the prevalence and distribution of rare ectopic impacted teeth at the Taibah University Dental College and Hospital (TUDCH), Al-Madinah Al-Munawwarah, Saudi Arabia. METHODS: The study designed through a retrospective radiographic cross-sectional survey involving the review and examination of 9000 archived digital orthopantomograms of patients who visited the (TUDCH) in the period from January 2014 to December 2019 and to analyze any associated factors. RESULTS: There were 63 ectopically impacted teeth, with an incidence of 0.7%. The age of the patients ranged from 18 to 68 years, with a mean of 32.4 ± 13 years. Regarding patient nationality, 68.3% were Saudis. The most common ectopically impacted teeth were the extra impacted premolars, with an incidence of 0.2%, followed by the inverted molars, impacted first or second molars, and buccoversion or lingoversion third molars, with incidences of 0.16%, 0.13%, and 0.12%, respectively. The mandible was affected with ectopic impaction more than the maxilla, with an incidence of 55.6%. There was no difference between the right and left sides. Impacted teeth in the sinus were the least common. CONCLUSION: The prevalence of ectopic impacted teeth was 0.7% among the surveyed patients at TUDCH, Al-Madinah Al-Munawwarah, Saudi Arabia. Hence, the oral surgeon must have readiness for such a challenging, increasing situation

Identification of a Prg4‐Expressing Articular Cartilage Progenitor Cell Population in Mice

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/111178/1/art39030.pd

Camptodactyly, Arthropathy, Coxa vara, Pericarditis (CACP)Syndrome: A Case Report

The camptodactyly-arthropathy-coxa vara-pericarditis syndrome (CACP) is characterized by congenital or early-onset camptodactyly, childhood-onset noninflammatory arthropathy associated with synovial hyperplasia. Some patients have pro-gressive coxa vara deformity and/or noninflammatory pericardial effusion. CACP is inherited as an autosomal recessive mode and the disease gene is assigned to a 1.9-cM interval on human chromosome 1q25-31. We describe a 10-yr-old boy who has typical features of CACP without familial association

Clinical presentations and outcomes of Filipino juvenile systemic lupus erythematosus

<p>Abstract</p> <p>Objective</p> <p>Juvenile Systemic Lupus Erythematosus (SLE) varies by location and ethnicity. This study describes the clinical, laboratory profile and outcome of juvenile SLE seen at Philippine General Hospital (PGH) from 2004-2008.</p> <p>Method</p> <p>Medical charts of all Filipino Juvenile SLE cases admitted at PGH during the 5-year period were reviewed collecting demographic profile, clinical and laboratory manifestations and treatment during disease course.</p> <p>Results</p> <p>Seventy-eight cases of juvenile SLE were reviewed. There were 7 boys and 71 girls. The mean age at diagnosis was 14 years (SD 2.7) with a range of 8-18 years. Fever (52.5%) and malar rash (41.0%) were the most common features at disease onset. At the time of diagnosis, the most common features were malar rash (65.3%), renal involvement (62.8%) and photosensitivity (55.1%). Mucocutaneous (92.3%), renal (71.7%) and hematologic (69.2%) involvement were the most common features during the entire course of illness. Infection (34.5%) and neurologic (19.0%) complications were observed most frequently. Corticocosteroid treatment was given in most of the patients in the form of prednisone (97.4%) and concomitant methylprednisolone intravenous pulses (29.4%). Nine patients died during the study period. The overall 5-year mortality rate was 11.5%. Infection (77.0%) was the most frequent cause of death.</p> <p>Conclusion</p> <p>Malar rash was a common feature at disease onset and at diagnosis among Filipinos with juvenile SLE. Throughout the disease course, renal involvement occurs in 71.7% of patients. Infection was the leading cause of complication and death. The clinical presentations of Filipinos with juvenile SLE were similar to juvenile SLE in other countries.</p