Abstract Close-distance coal seams are widely distributed over China, and the pillars left by overlying affect retracement channel of underlying seam in stopping stage. Based on engineering background close-distance mining a mine, reasonable position seam's line support method large section roadway during investigated using field measurements, similar simulation experiments, numerical simulatio...

conclusions the axillary arch variation is very clinically important, because it may entrap and implicate the neurovascular bundle. also it is important for surgeons during operation, so they need to be aware of possible presence of such variations. case presentation during routine dissection, we encountered an aberrant slip of muscle and fascia expanded from latissimus dorsi to pectoralis majo...

BACKGROUND Aortic arch replacement using standard techniques, including deep hypothermic circulatory arrest and selective antegrade cerebral perfusion, is still associated with significant mortality and cerebral morbidity. We have previously described the "branch-first" technique that avoids circulatory arrest or profound hypothermia with excellent outcomes. We now describe our clinical experie...

conclusions this study shows that simultaneous arch osteotomy and coronoidectomy may be an appropriate treatment procedure for zygomatico-coronoid interference. introduction zygomatico-coronoid interference is a rare type of mandibular extracapsular ankylosis. there is a lack of information on the treatment of these cases in the literature. condylectomy and coronoidectomy are not always the bes...

STATEMENT OF THE PROBLEM The stability of orthodontic treatment depends on preserving the patient's pretreatment arch form and arch size during and after treatment. PURPOSE This investigation was aimed to study the size and shape of Iranian mandibular dental arch and evaluate the correlation of their average dental arch with commercially available preformed rectangular nickel-titanium arch wi...

Three major arteries normally originate from the aortic arch. Variations of the aortic arch branches are observed in some cases. Rare variation of the aortic arch branches is originated from the retroesophageal right subclavian (RRS) artery as the last branch of the aortic arch. Variation of artery is possibly associated with the variation of the recurrent laryngeal nerve. This research p...