[Synthetic calcium phosphate ceramics in secondary alveoloplasty].

Introduction: Bone substitutes are rarely used in the reconstruction of cleft lip and palate. The graft material of choice is cancellous bone, harvested in the hip or tibia. Tibial harvesting may lead to postoperative morbidity, or even complications.

The benefits of using anchorage miniplates: are they compatible with everyday orthodontic practice?

Nowadays, it is difficult to ignore the major role played by orthodontic anchorage. Given our convictions and after several years of using these systems, we believe it is time to take stock. Is there any real benefit to using them? And if so, when? What systems should we use? Miniscrews or miniplates? What are the indications for each of these systems? Are they compatible with everyday orthodontic practice? In a nutshell, are these orthodontic anchorage devices myth or practical reality?

[Lesions of the lingual nerve during extraction of the mandibular wisdom teeth. Consequences--etiopathogenesis--prevention--prognosis--legal medical aspects].

A brief review of the lingual nerve anatomy is followed by an examination of the consequences of injury to the lingual nerve during mandibular wisdom tooth extraction on sensibility and sensorial activities. The circumstances of such injury are described as a function of the position of the tooth together with means of prevention. The clinical course of injury to the lingual nerve is unpredictable and varies over time and in quality of recovery.

[Synthesis, biological activity and encapsulation of new adrenergic beta-amino alcohols in phospholipid liposomes].

New beta-amino-alcohols were synthesized and showed beta-blocking biological activity. These potential drugs, as well as natrium salicylate, have been entrapped in phospholipid liposomes. Drug-containing liposomes were prepared from egg lecithin and DPPC (Dipalmitoylphosphatidylcholine) by the injection method.

Effect of the lipid phase transition on the kinetics of H+/OH- diffusion across phosphatidic acid bilayers.

The kinetics of H+/OH- diffusion across dimyristoyl phosphatidic acid bilayer membranes was measured by following the absorbance of the pH-sensitive indicator Cresol red (o-cresolsulfonphthalein) entrapped in single lamellar vesicles after rapidly changing the external pH in a stopped-flow apparatus. The H+/OH- permeability coefficient was found to be in the 10(-5) to 10(-3) cm . s-1 range.

Incorporation kinetics of lysolecithin into lecithin vesicles. Kinetics of lysolecithin-induced vesicle fusion.

The incorporation kinetics of L-palmitoylphosphatidylcholine (lysolecithin) into dimyristoyl- and dipalmitoylphosphatidylcholine vesicles and the subsequent aggregation and fusion of the vesicles into larger aggregates were studied by using stopped-flow rapid-mixing techniques. The half-times for the lysolecithin incorporation vary between 50 and 500 ms. The incorporation rate has a maximum in the temperature range of the vesicle phase transition.