Biomechanical evaluation of resistance to insertion torque of different implant systems and insertion driver types.

Purpose: The aim of this study was to quantify the resistance to torque of different implant systems and their connection devices using in vitro torsion tests.

Materials And Methods: Three internal connection systems, 1 conventional system with internal torque and 1 conventional system with a mounting device used as a control group were tested on 5 groups.

Results: Rupture torque (in newton meter): Biomet 3i Certain group 4 showed a statistically significant higher average (2.

Identification and characterization of SAP25, a novel component of the mSin3 corepressor complex.

The transcriptional corepressor mSin3 is associated with histone deacetylases (HDACs) and is utilized by many DNA-binding transcriptional repressors. We have cloned and characterized a novel mSin3A-binding protein, SAP25. SAP25 binds to the PAH1 domain of mSin3A, associates with the mSin3A-HDAC complex in vivo, and represses transcription when tethered to DNA.

Extramedullary myeloid tumors in children: the limited value of local treatment.

Purpose: To determine the incidence of extramedullary tumors (EMT) in Saudi Arabian children with acute myeloid leukemia, the factors associated with these tumors and the impact of local treatment on local tumor control, complete remission and survival rates.

Patients And Methods: One hundred children, median age 6 years, who received their primary treatment for acute myeloid leukemia at King Faisal Specialist Hospital and Research Center, from 1983 to 1997 were studied. EMT at diagnosis occurred in 18 (18%) patients at 25 sites.

[Leopard spot chorioretinopathy. Initial manifestation of recurrent acute lymphocytic leukemia].

An 11-year-old girl with a history of acute lymphocytic leukemia of the central nervous system had attained complete remission for almost 3 1/2 years after combination chemotherapy and radiotherapy when she developed iritis and chorioretinopathy of the right eye. Neither an anterior chamber tap nor a diagnostic vitrectomy revealed leukemic cells. Both nonspecific anti-inflammatory therapy and antiviral treatment were unsuccessful.