Design of 3D printing osteotomy block for foot based on triply periodic minimal surface.

The ankle joint, which connects the lower limbs and the sole of the foot, is prone to sprain during walking and sports, which leads to ankle arthritis. Supratroleolar osteotomy is an ankle preserving operation for the treatment of ankle arthritis, in which the osteotomy is an important fixing and supporting part. In order to avoid stress shielding effect as much as possible, the osteotomy block is designed as a porous structure.

Mechanisms of Neuronal Reactivation in Memory Consolidation: A Perspective from Pathological Conditions.

Memory consolidation refers to a process by which labile newly formed memory traces are progressively strengthened into long term memories and become more resistant to interference. Recent work has revealed that spontaneous hippocampal activity during rest, commonly referred to as "offline" activity, plays a critical role in the process of memory consolidation. Hippocampal reactivation occurs during sharp-wave ripples (SWRs), which are events associated with highly synchronous neural firing in the hippocampus and modulation of neural activity in distributed brain regions.

[Virtual preoperative planning and 3D-printed templates for pre-contoured plates in treatment of acetabular posterior wall fractures].

Objective: To evaluate the feasibility and accuracy of virtual preoperative planning and 3D-printed templates for pre-contoured plates for the treatment of posterior wall fractures of the acetabulum.

Methods: A retrospective analysis of 29 patients with posterior acetabular wall fractures treated between August 2017 and March 2021 were divided into 2 groups based on whether to use preoperative virtual planning and 3D printed template. In 3D-printing group, there were 14 patients, including 10 males and 4 females； aged from 21 to 53 years old；CT-based virtual surgical planning was done using Mimics and 3-Matic software and 3D-printed templates for pre-contoured plates were adopted.

Three dimension printing talar prostheses for total replacement in talar necrosis and collapse.

Background: Reconstructing bone structures and stabilizing adjacent joints are clinical challenges in treating talar necrosis and collapse (TNC). 3D printing technology has been demonstrated to improve the accuracy of talar replacement. This study aimed to evaluate anatomical talar replacement and the clinical results.

Analysis of the stress distribution of the subtalar joint and fusion efficacy after double-screw insertion.

Background: Screw fixation is a typical technique for the isolated subtalar joint. However, no consensus has been reached on how to select the most suitable insertion position and direction. This study aims to find the ideal screw insertion and then explore its influence on the clinical efficacy of subtalar fusion by analyzing the effects of different cannulated screw insertions on the stress distribution, anti-rotary strength, and anti-inversion/eversion strength of the subtalar joint.

Interleukin-15 facilitates muscle regeneration through modulation of fibro/adipogenic progenitors.

Background: Chronic muscle injury is characteristics of fatty infiltration and fibrosis. Recently, fibro/adipogenic progenitors (FAPs) were found to be indispensable for muscular regeneration while were also responsible for fibrosis and fatty infiltration in muscle injury. Many myokines have been proven to regulate the adipose or cell proliferation.

3D printing lunate prosthesis for stage IIIc Kienböck's disease: a case report.

Stage IIIc Kienböck's disease is a clinical challenge to treat collapse of the lunate bone. A new reconstructive surgery was described in one patient using 3D printing lunate prosthesis. The prosthesis shape was designed by tomographic image processing and segmentation using technology compared with the intact side matched by mirror symmetry and 3D post-processing technologies.

Individual headless compression screws fixed with three-dimensional image processing technology improves fusion rates of isolated talonavicular arthrodesis.

Background: Screw fixation is a typical technique for isolated talonavicular arthrodesis (TNA), however, no consensus has been reached on how to select most suitable inserted position and direction. The study aimed to present a new fixation technique and to evaluate the clinical outcome of individual headless compression screws (HCSs) applied with three-dimensional (3D) image processing technology to isolated TNA.

Methods: From 2007 to 2014, 69 patients underwent isolated TNA by using double Acutrak HCSs.

[Percutaneous achilles tendon lengthening through double hemisection in the treatment of achilles contracture syndrome].

Objective: To explore the surgical approach of percutaneous double hemisection and evaluate its clinical efficacies.

Methods: From May 2006 to November 2011, a total of 59 patients were recruited. There were 36 males and 21 females with a mean age of 38.

[Effects of different cyclic mechanical stretching loads on human tenocytic cytoskeleton in vitro].

Objective: To investigate the human tenocyte cytoskeleton under different in vitro stretching conditions and analyze the relations between the changes of tenocytic cytoskeleton and different stretching loads.

Methods: Human tenocytes, cultivated for 5 -7 passages, were stretched under 4%, 8% and 12% cyclic mechanical stretching with a duration of 2, 4, 8, 12, 24 hours and a frequency of 0.5 and 1.

[Relationship between glenoid inclination or version and supraspinatus tendon full-thickness tears].

Objective: To investigate the relationship between glenoid inclination or version and supraspinatus tendon full-thickness tears.

Methods: Forty-two cases of unilateral supraspinatus tendon full-thickness tears were confirmed by clinical examinations and MRI scans. The bilateral glenoid inclination and version angles, measured by the volume rendering technique (VRT) and multi-planar reformation (MPR) of multi-slice computed tomography (MSCT) under 16-slice spiral CT scans, were compared by paired t test in all cases.

[Medial displacement calcaneal osteotomy with mini-incision for the treatment of acquired flexible flatfoot caused by posterior tibial tendon dysfunction].

Objective: To investigate the clinical outcomes of medial displacement calcaneal osteotomy with mini-incision for the treatment of acquired flexible flatfoot caused by posterior tibial tendon dysfunction.

Methods: From 2005 to 2009, 10 patients (13 feet) of acquired flexible flatfoot with obvious heel valgus underwent medial displacement calcaneal osteotomy with mini-incision. The lateral skin incision of 3.

[Triple arthrodesis with osteotomy for the treatment of stage IIB and stage III adult-acquired flatfoot deformity].

Objective: To analyze the clinical outcomes of triple arthrodesis with osteotomy in the treatment of Stage IIB and Stage III adult-acquired flatfoot.

Methods: The authors reviewed 10 cases of adult-acquired flatfoot, including 3 cases of stage IIB adult-acquired flatfoot and 7 cases of stage III adult-acquired flatfoot. They were treated by triple arthrodesis with osteotomy of subtalar joint (STJ), talonavicular joint (TNJ) and calcaneocuboid joint (CCJ).