A Ni-catalyzed asymmetric C(sp)-P cross-coupling reaction for the synthesis of P-stereogenic alkynylphosphines.

Due to the high reactivity of the triple bond, P-stereogenic alkynylphosphines could be easily derivatized, serving as universal building blocks for structurally diverse phosphine compounds. However, the synthesis of alkynylphosphines direct P-C bond formation was unprecedented. Here, we report an efficient method for the synthesis of P-stereogenic alkynylphosphines with high enantioselectivity a Ni-catalyzed asymmetric cross-coupling reaction.

[Clinical application of sinus floor elevation guided by cone-beam computer tomography].

Purpose: To investigate the value of using con-beam computer tomography (CBCT) to evaluate bone volume in the edentulous area of posterior maxilla, and guide sinus floor elevation.

Methods: Twenty eight patients who planed to receive dental implant in the posterior maxilla underwent CBCT scan. After analysis of residual bone height, 19 patients with 5-10 mm bone height below the sinus floor underwent transcrestal sinus floor elevation, while 7 patients with less than 5 mm bone height below the sinus floor underwent lateral window sinus floor elevation.

[Clinical use of beta-tricalcium phosphate ceramics with patient's own bone in maxillary elevation with osteotome].

Purpose: To evaluate the clinical value of using the patient's autogenous bone mixed with beta-tricalcium phosphate ceramics(β-TCP) for maxillary sinus lift with simultaneous implantation.

Methods: Patients with loss of posterior teeth and bone height of maxillary sinus floor between 4-10mm underwent internal sinus floor elevation, the proportion of bone to β-TCP was 1:1 and the mixture was inserted into the sinus floor. All cases had simultaneously placed ITI implants.

[The application of lateral brow incision by the guide of sphenozygomatic suture for zygomatic complex fracture].

Purpose: To explore the application of lateral brow incision by the guide of sphenozygomatic suture for zygomatic complex fracture.

Methods: Lateral brow incision combined with intraoral vestibule incision and below cilia incision were applied in 26 patients who had Zingg's type B and C zygomatic complex fracture,through which the fracture lines around the forehead and zygomatic suture, sphenozygomatic suture, suborbital edge, zygomatic maxillary suture, zygomatic temporal suture, zygoma- alveolar column were exposed. After accurate reduction by the guide of sphenozygomatic suture, rigid fixation by titanium plates was performed.