[Clinical effect of cortical incision with rapid maxillary expansion to assist orthodontic-orthognathic treatment of skeletal Class Ⅲ malocclusion].

Purpose: To investigate the clinical effect of rapid maxillary expansion with cortical osteotomy combined with orthodontic- orthognathic treatment for skeletal Class Ⅲ malocclusion.

Methods: A total of 84 patients with skeletal Class Ⅲ malocclusion admitted to Jining Dental Hospital from March 2018 to May 2020 were randomly divided into experimental group and control group, with 42 cases in each group. The control group was treated with orthodontic-orthognathic treatment, while the experimental group was treated with orthodontic-orthognathic treatment with rapid maxillary arch expansion by cortical incision.

[The impact of interrupted abdominal aorta compression on resuscitation effects of cardiac arrest rabbit].

Objective: To determine whether interrupted abdominal aorta compression-cardiopulmonary resuscitation (IAAC-CPR), as a new cardiopulmonary resuscitation (CPR) method, can improve resuscitation effects on rabbits with cardiac arrest (CA).

Methods: Twenty-eight New Zealand rabbits were randomly divided into two groups in equal number (n=14), and they were resuscitated either by standard CPR (STD-CPR, external chest compression) or by IAAC-CPR (abdominal aorta compression at intermission of external chest compression). CA model was reproduced by injection of iced-potassium chloride, and it was maintained for 3 minutes before resuscitation.