[Reconstruction of the mandibular model using a three-dimensional laser scanner].

Objective: To construct a three-dimensional (3D) mandibular model using a 3D laser scanner, and explore a new method for reconstructing the finite element geometry model.

Methods: A mandible specimen was scanned with the 3D laser scanner to form the point clouds of the mandibular surface, which were subsequently aligned for reconstruction of the mandibular model.

Result: A 3D model of the mandible surface was reconstructed, which could be used for finite element simulation.

[Applied anatomic study on blood supply for extracranial segment of facial nerve].

Objective: To explore the arterial origin and the distribution of the extracranial branches of the facial nerve.

Methods: Red latex or red chlorinated polyvinyl chloride was injected into the arteries of 15 fresh adult head specimens by both common carotid artery catheterization. The arterial origin and distribution of the extracranial branches of the facial nerve were observed.

Effects of stanozolol on bone mineral density and bone biomechanical properties of osteoporotic rats.

Objective: To evaluate the effects of stanozolol on the bone mineral density (BMD) and bone biomechanical properties of rats with glucocorticoid (GC)-induced osteoporosis (OP).

Methods: Twenty-eight male Sprague-Dawley rats of 3-month old were randomly divided into Group A (the basal control group), Group B (the age-matched control group), Group C (GC-induced OP group) and Group D (stanozolol-administrated group), 7 in each group. The rats in Group A were killed when experiment commenced, and those in Group B were given normal saline ig.

Effects of prednisone on bone mineral density and biomechanical characteristics of the femora and lumbar vertebras in rats.

Objective: To explore effects of prednisone on the bone mineral density (BMD) and biomechanics of the femora and lumbar vertebras in rats.

Methods: Twenty one 3-month-old male Sprague-Dawley rats weighing 226+/-12 g were randomly divided into basal control, age-matched and hormone groups. The rats in basal control group were killed at the beginning of the experiment without any treatment, and those in age-matched group were given oral normal saline (5 ml x kg(-1) x d(-1)) while the rats in hormone group received oral prednisone acetate (4.