Implants as Surveyed Crowns for Implant-Assisted Removable Partial Dentures: A Long-Term Case Series Study.

Purpose: Long-term data on the use of implants as surveyed crowns for implant-assisted removable partial dentures (IARPDSCs) are limited. This study evaluated the long-term outcomes and assessed the risk factors associated with marginal bone loss (MBL) in IARPDSCs.

Materials And Methods: A total of 51 implants were placed in 14 partially or fully edentulous patients and restored using IARPDSCs.

Highly Accurate Chip-Based Resequencing of SARS-CoV-2 Clinical Samples.

SARS-CoV-2 has infected over 128 million people worldwide, and until a vaccine is developed and widely disseminated, vigilant testing and contact tracing are the most effective ways to slow the spread of COVID-19. Typical clinical testing only confirms the presence or absence of the virus, but rather, a simple and rapid testing procedure that sequences the entire genome would be impactful and allow for tracing the spread of the virus and variants, as well as the appearance of new variants. However, traditional short read sequencing methods are time consuming and expensive.

Illuminating Women's Hidden Contribution to Historical Theoretical Population Genetics.

While productivity in academia is measured through authorship, not all scientific contributors have been recognized as authors. We consider nonauthor "acknowledged programmers" (APs), who developed, ran, and sometimes analyzed the results of computer programs. We identified APs in articles published between 1970 and 1990, finding that APs were disproportionately women ( = 4.

Effect of different alloplast materials on the stability of vertically augmented new tissue.

Purpose: Vertical ridge augmentation is a technique to enhance alveolar bone growth or to correct bone defects. However, its long-term predictability and stability are still unknown. The aim of this study was to evaluate the impact of three alloplastic grafting materials on the retention of vertically augmented bone tissue.

Short-TE proton magnetic resonance spectroscopy investigation in adolescents with attention-deficit hyperactivity disorder.

In this study, short echo time (1)H-magnetic resonance spectroscopy (MRS) was applied for quantification of neurometabolites using the LC Model algorithm in Taiwanese adolescents with attention-deficit hyperactivity disorder (ADHD). Proton magnetic resonance spectra were acquired bilaterally on the prefrontal area (part of the anterior cingulate gyrus and part of the medial frontal gyrus) in 15 adolescents with ADHD (average age of 13.88years) and 22 controls (average age of 14.

Hypoxic preconditioning prevents cortical infarction by transient focal ischemia-reperfusion.

One of the proposed pathologic actions underlying brain infarction is excess free radicals resulting from reoxygenation. In this paper we report an investigation of the neuroprotective effect of hypoxic preconditioning on transient focal ischemia-reperfusion injuries in rat brain. Female Wistar rats were subjected to 380 mmHg in an altitude chamber for 15 hours/day.

Crown diameters of the deciduous teeth of Taiwanese.

The purposes of this study were (1) to characterize the crown diameters of the deciduous teeth of Taiwanese; (2) to compare the differences in the deciduous crown diameters between different populations. The results might provide odontometric information in making preformed stainless steel crowns of the Chinese population. Study casts of 90 children (51 boys and 39 girls) of aged 3 to 6 years were used in this study.

Effects of mutans streptococci, Actinomyces species and Porphyromonas gingivalis on collagen degradation.

Background: While Streptococcus mutans and Actinomyces spp are considered to be major pathogenic microorganisms of root caries, their roles in the degradation of organic matrix components of human root dentin need clarification.

Methods: Ten laboratory strains and 11 clinical isolates of mutans streptococci and Actinomyces species, and positive bacterial or purified enzyme controls (Porphyromonas gingivalis whole cell lysates, trypsin or clostridial collagenase) were used to establish the degradation of azocollagen (AC), insoluble type I collagen (IC) or human dentin collagen (DC) from dentin powder in two types of experiments investigating collagenolytic activity either during or after bacterial growth. Ultraviolet-irradiated dentin powder and gamma-irradiated IC were used to assess the collagenolytic activity of test strains during bacterial growth.

Application of Recombinant Rhodostomin in Studying Cell Adhesion.

Rhodostomin from venom of Agkistrodon rhodostoma (also called Calloselasma rhodostoma) contains 68 amino acid residues including 6 pairs of disulfide bonds and an arginine-glycine-aspartic acid (RGD) sequence at positions 49-51. It has been known as one of the strongest antagonists to platelet aggregation among the family termed disintegrin. In this review paper, in addition to introducing the characteristics of disintegrin and its related molecules, the advantages of using recombinant DNA technology to produce rhodostomin are described.

Effect of lactic acid and proteolytic enzymes on the release of organic matrix components from human root dentin.

The mechanisms of organic matrix breakdown in the root caries process are not well understood. Therefore, the combined and separate effects of lactic acid and proteolytic enzymes on the degradation of human dentin collagen, glycoproteins, proteoglycans and phosphoproteins were investigated in the present study. Dentin powder was pretreated with lactic acid (pH 4.

Degradation of insoluble bovine collagen and human dentine collagen pretreated in vitro with lactic acid, pH 4.0 and 5.5.

The purpose of the study was to test the hypothesis that both insoluble pure type I collagen from bovine Achilles tendon and dentine collagen in root dentine powder from human teeth required acid pretreatment for subsequent degradation by trypsin, a non-specific protease. Pure type I collagen or dentine powder was treated with lactic acid, at pH 4 or 5.5, or distilled, deionized water (pH 7) as a negative control.