Recent progress in minimizing the warpage and shrinkage deformations by the optimization of process parameters in plastic injection molding: a review.

The quality control of plastic products is an essential aspect of the plastic injection molding (PIM) process. However, the warpage and shrinkage deformations continue to exist because the PIM process is easily interfered with by several related or independent process parameters. Thus, great efforts have been devoted to optimizing process parameters to minimize the warpage and shrinkage deformations of products during the last decades.

[Comparison of the incidence rates of anastomotic leak following lower anterior resection of rectal cancer between laparoscopic and open operation].

Objective: To investigate and compare the incidence rates of postoperative anastomotic leak following laparoscopic (LP) versus open (OP) lower anterior resection for rectal cancer.

Methods: Fifty-three cases of LP and 135 cases of OP lower anterior resection with rectal cancer site 5-8 cm away from anal edge were operated by the same surgeon team from Sep. 2000 to Dec.