A new approach to treat bone gaps after midfacial and zygomatic fractures with a collagen membrane.

Purpose: The aim of the study was to analyze the eligibility of resorbable collagen membrane in the treatment of midfacial fractures to prevent gap formation and subsequent cheek tissue retraction.

Material And Methods: We included nine patients (six males, three females; mean age 51; range 20-73 years; mean bone gap size 8.03 × 13.

Structural analyses of N-acetylated 4-(dimethylamino)pyridine (DMAP) salts.

We have studied the formation of several N-acetyl-4-(dimethylamino)pyridine (DMAP) salts (with Cl(-), CH(3)COO(-), and CF(3)COO(-) counterions), which are considered to be the catalytically active species in DMAP-catalyzed acetylation reactions of alcohols. Combined crystal structure analyses, variable temperature matrix IR and NMR spectroscopy as well as computational techniques at the UAHF-PCM-B3LYP/6-311+G(d,p)//B3LYP/6-31G(d) level were utilized to examine the structures and dynamics of salt formation. We found clear evidence for the formation of tight ion pairs that are stabilized by dynamic hydrogen-bonding interactions.

Aliphatic C-H bond oxidation of toluene using copper peroxo complexes that are stable at room temperature.

Dinuclear copper peroxo complexes obtained from mononuclear copper(I) complexes showed extremely high stabilities under ambient conditions in the solid state and could be heated above 100 degrees C without decomposition. The increased stability could be explained with regard to their molecular structures. Furthermore, the four complexes investigated showed a high potential for aliphatic C-H bond oxidations: for example, technical-grade toluene was oxidized to benzaldehyde in yields of up to 20%.

Two-year results after lumbar microdiscectomy with and without prophylaxis of a peridural fibrosis using Adcon-L.

Background: A retrospective study investigated the advantages of the intraoperative application of the anti-adhesion barrier gel Adcon-L after lumbar microdiscectomy.

Methods: For the study, 92 patients were recruited. Following the operation, 46 patients (study group) received Adcon-L application.