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Introduction Anterior cruciate ligament (ACL) injury always leads to knee pain and dysfunction for which surgical reconstruction is recommended, with good clinical results, but decreased postoperative proprioception also tends to occur. ACL stump (ACLS)-retaining ACL reconstruction and non-ACLS-retaining ACL reconstruction are the two surgical options. Aim To investigate the efficacy of retaining the ACLS in allograft reconstruction. Material and methods Thirty patients were retrospectively assigned to group A, ACLS-retaining ACL reconstruction; and group B, non-ACLS-retaining ACL reconstruction, and their data were analyzed. The knee function (Lysholm score and Tegner motion score) and proprioceptive function of the two groups were assessed and compared by postoperative reconstruction angle. Results The 30 patients were followed up for a mean 20 months. The mean Lysholm score in group A increased from 55.7 ±11.6 points preoperatively to 95.2 ±5.7 points postoperatively; that in group B increased from 56.7 ±11.3 points preoperatively to 94.6 ±7.2 points postoperatively. The mean Tegner motion score in group A was increased from 2.4 ±0.7 points preoperatively to 6.0 ±0.7 points postoperatively; that in group B increased from 2.73 ±0.96 points preoperatively to 6.24 ±0.48 points postoperatively; the postoperative scores did not differ significantly between the two groups. The proprioception was better in group A than in group B at 3, 6, and 12 months postoperatively (p Conclusions ACLS-retaining ACL reconstruction has good efficacy and the retained ACLS can benefit postoperative proprioception recovery at an early stage.

Sichuan province is very famous for its abundant resources of traditional Chinese medicine(TCM).However, within the scope of administrative division of Sichuan province, the origin records of Dao-di herbs in different historical periods show a dynamic distribution process. On the basis of carefully sorting out the geographical scope of Sichuan province in different historical periods, this article focuses on the textual research of the Dao-di herbs in Sichuan province recorded in the seven mainstream ancient works of materia medica.The results showed that, according to the records of Mingyi bielu and Bencaojing Jizhu, the main distribution areas of Dao-di herbs were mainly in the central and eastern regions of Sichuan province, mainly including Moschus, Coptidis Rhizoma, Zingiberis Rhizoma, Aconiti Lateralis Radix Praeparata and most of the rest materia medica had become unused in the historical process. Qianjin Yifang records that the distribution areas of Dao-di herbs were mainly in the middle and eastern part of Sichuan province.Aconiti Radix, Lateralis Radix Praeparata, Zingiberis Rhizoma, Notopterygii Rhizoma et Radix are still the Dao-di herbs of Sichuan province. According to the book of Bencao Tujing,the main distribution areas of Dao-di herbs are Chengdu Plain, Yibin and Santai, While Toosendan Fructus, Chuanxiong Rhizoma, Zanthoxyli Pericarpium, Aconiti Radix are still the Dao-di herbs of Sichuan province. Ben Cao Gang Mu records the place of origin as Sichuan.Coptidis Rhizoma, Toosendan Fructus, Cyathulae Radix are still the Dao-di herbs of Sichuan pro-vince. Yaowu Chuchanbian and Zengding Weiyao Tiaobian records the place of origin as Sichuan, as well as Kangding, Songpan, Dujiang-yan, Jiangyou, Nanchong, Ya'an, etc. Moschus, Coptidis Rhizoma, Eucommiae Cortex, Phellodendri Chinensis Cortex are still the Dao-di herbs of Sichuan province. The results of this article provide a new understanding of the history and distribution changes of Dao-di herbs in Sichuan province, and can help to further understand the formation connotation of Sichuan Dao-di herbs.

This paper collected and classified the failure modes and mechanisms of quartz crystals from actual engineering application. Through related failure analysis cases, combined with scanning electron microscopy and energy spectrum analysis, failure analysis results of quartz crystals of common failure mechanism were presented and studied. The quality and process controlling and reliability screening methods were suggested.