Anatomic measurements and quantitative analysis of posterior acetabular wall / 中国骨伤

<p><b>OBJECTIVE</b>To explore morphological character and clinical significance of superior-posterior acetabular wall by anatomically measuring and quantitatively analyzing thickness of posterior acetabular wall, then provide a theoretical reference for clinical treatment of acetabular fracture.</p><p><b>METHODS</b>Fifteen adult formalin-preserved cadaveric pelvises (8 males and 7 females) were used for this investigation. Excess soft tissue was removed and the whole acetabular posterior walls were marked with "angle" sector method and the thickness was measured with caliper in different levels of the different split points. The measurement results were validated and analyzed statistically.</p><p><b>RESULTS</b>At 5 mm away from acetabular rim, the average thickness of superior-posterior acetablar wall fluctuated between (6.47±0.61) mm and (7.43±0.71) mm; the average thickness of inferior-posterior acetabuluar wall fluctuated between (5.62±0.51) mm and (6.33±0.61) mm; the average thickness of acetabular roof fluctuated between (7.71±0.74) mm and (8.27±0.99) mm. There was no statistical difference between average thickness of superior-posterior wall of acetabulum and inferior-posterior wall of acetabulum (P>0.05), but the average thickness of acetabular roof was significantly larger than superior-posterior acetabular wall (P<0.05). At 10 mm away from the acetabular rim, the average thickness of superior-posterior acetabular wall fluctuated between (8.81±0.67) mm and (13.35±0.89)mm; the average thickness of inferior-posterior acetabular wall fluctuated between (7.02±0.63) mm and (7.66±0.69) mm; the average thickness of acetabular roof fluctuated between (14.46±0.97) mm and (17.05±1.35) mm. Comparatively, the average thickness of superior-posterior acetabular wall was significantly larger than inferior-posterior wall of acetabulum (P<0.05), and the average thickness of acetabular roof was significantly larger than superior-posterior acetabular wall (P<0.01). At 15 mm away from the acetabular rim, the average thickness of superior-posterior acetabular wall fluctuated between (12.08±0.78) mm and (19.84±1.03) mm; the average thickness of inferior-posterior acetabular wall fluctuated between (10.17±0.76) mm and (11.12± 0.77) mm; the average thickness of acetabular roof fluctuated between (23.23±1.12) mm and (26.01±1.53) mm. Comparatively, the average thickness of superior-posterior wall of acetabulum was significantly larger than inferior-posterior acetabular wall (P<0.01), and the average thickness of acetabular roof was significantly larger than superior-posterior acetabular wall (P< 0.01).</p><p><b>CONCLUSION</b>The thickness of entire acetabular posterior edge revealed an increasing tendency from inferior-posterior wall to the superior-posterior wall to acetabular roof. And this trend became more obvious with increasing distance away from acetabular rim. Therefore, the superior-posterior acetabular wall could not only maintain the stability of hip joint but also bear loading.</p>

A three-dimensional polymeric potassium complex of 5-sulfonobenzene-1,2,4-tricarboxylic acid: poly[µ-aqua-aqua-µ9-(2,4-dicarboxy-5-sulfonatobenzoato)-dipotassium(I)].

The asymmetric unit in the structure of the title compound, [K2(C9H4O9S)(H2O)2]n, consists of two eight-coordinated K(I) cations, one 2,4-dicarboxy-5-sulfonatobenzoate dianion (H2SBTC(2-)), one bridging water molecule and one terminal coordinated water molecule. One K(I) cation is coordinated by three carboxylate O atoms and three sulfonate O atoms from four H2SBTC(2-) ligands and by two bridging water molecules. The second K(I) cation is coordinated by four sulfonate O atoms and three carboxylate O atoms from five H2SBTC(2-) ligands and by one terminal coordinated water molecule. The K(I) cations are linked by sulfonate groups to give a one-dimensional inorganic chain with cage-like K4(SO3)2 repeat units. These one-dimensional chains are bridged by one of the carboxylic acid groups of the H2SBTC(2-) ligand to form a two-dimensional layer, and these layers are further linked by the remaining carboxylate groups and the benzene rings of the H2SBTC(2-) ligands to generate a three-dimensional framework. The compound displays a photoluminescent emission at 460 nm upon excitation at 358 nm. In addition, the thermal stability of the title compound has been studied.

Chiral induction in the ionothermal synthesis of a 3D chiral heterometallic metal-organic framework constructed from achiral 1,4-naphthalenedicarboxylate.

A chiral heteometallic compound, [(EMIM)NaCu(1,4-ndc)2]n (1), constructed from the achiral 1,4-naphthalenedicarboxylate (1,4-ndc) ligand has been ionothermally synthesized and structurally and magnetically characterized. The chiral induction effect of the enantiopure 1-ethyl-3-methylimidazolium (EMIM) L-lactate additive in the ionothermal reaction is briefly discussed.

A two-dimensional coordination polymer containing a two-dimensional zinc-carboxylate layer constructed from helical chains: poly[(µ4-benzene-1,2-dicarboxylato)zinc(II)].

The title compound, [Zn(C(8)H(4)O(4))](n), consists of one Zn(II) cation and one benzene-1,2-dicarboxylate dianion (BDC(2-)) as the building unit. The Zn(II) cation is four-coordinated by four carboxylate O atoms from four dianionic BDC(2-) ligands in a distorted tetrahedral geometry. The Zn(II) cations are linked by the BDC(2-) ligands to generate a structure featuring two-dimensional zinc-carboxylate layers containing left- and right-handed helical chains. The two-dimensional layers are stacked along the a direction. The thermal stability of the title compound has been studied.