Evaluation the loosening of abutment screws in fluid contamination: an in vitro study.

Screw loosening is one of the most common clinical problems of dental implants. Research on the influencing factors of screw loosening is very important to prevent screw loosening. The purpose of this in vitro study was to evaluate the influence of liquid contamination on the screw loosening.

Factors associated with brain white matter damage in type 2 diabetes mellitus: a tract-based spatial statistics study.

Background: The pathogenesis and related factors of central nervous system abnormality in patients with type 2 diabetes mellitus (T2DM) have always been the focus of clinical research.

Purpose: To compare and analyze the area of white matter (WM) damage in patients with T2DM based on their level of hemoglobin A (HBA) and discuss any related factors.

Material And Methods: Based on their levels of HBA, 87 patients with T2DM were divided into three groups (Group B, C, or D), of which 29 non-diabetic volunteers served as the control group (Group A).

[Application of 3D printing in the treatment of unilateral comminuted zygomatic bone fracture].

Unlabelled: To explore the validity of 3D printing technique in the treatment of unilateral comminuted zygomatic bone fracture.

Methods: Twenty-one patients with unilateral comminuted zygomatic bone fracture were included in the present study, which were treated from hospital January 2014 to April 2017. All patients underwent CT scan and the data were imported in Mimics 10.

[Comparison of short-term clinical effect and assessment of influencial factors around single-tooth in the aesthetic area: immediate implant placement versus delayed implant placement].

Purpose: To compare the short-term clinical effect and to assess the influencial factors of immediate implant placement and delayed implant placement around single-tooth implant in the aesthetic area.

Methods: A total of 114 patients requiring a single-tooth implant in the aesthetic area were reviewed at Center for Implant Dentistry of Stomatological Hospital of China Medical University. They were divided into immediate implant group and delayed implant group.

In Vivo Effect of Titanium Implants with Porous Zinc-Containing Coatings Prepared by Plasma Electrolytic Oxidation Method on Osseointegration in Rabbits.

Purpose: The aim of this study was to confirm the in vivo effect of surface-modified titanium (Ti) implants with zinc (Zn) prepared by a plasma electrolytic oxidation (PEO) method on the process of osseointegration.

Materials And Methods: Forty-five New Zealand white rabbits were used. Implants were divided into three groups due to different surface treatments (the PEO-Zn group, the PEO-calcium phosphorus [Ca/P] group, and the sandblasted [control] group) and were randomly inserted into rabbits' mandibles.

A new method of CT for the cardiac measurement: correlation of computed tomography measured cardiac parameters and pulmonary obstruction index to assess cardiac morphological changes in acute pulmonary embolism patients.

Acute pulmonary embolism (APE) is a serious disease which is life-threatening. Since it is crucial for APE patients to assess the changes of cardiac function safely and timely, the imaging research of cardiac morphology and function is becoming more and more important. The correlation of computed tomography (CT) measured cardiac parameters and pulmonary obstruction index (POI) was analyzed to discuss the morphological changes of the heart of APE patients in order to provide a new method to evaluate cardiac functions accurately and effectively.

Laparoscopic resection of gastric duplication cysts in newborns: a report of five cases.

Background: Gastric duplication cysts are rare congenital alimentary tract anomalies and most cases are recognized during childhood. There were few reports about gastric duplication cysts in newborns and even fewer reports about laparoscopic resection of gastric duplication cysts in newborns.

Case Presentation: We report a series of five newborns with gastric duplication cysts which were successfully resected by laparoscopy between January 2010 and April 2015.

[Study of relationship between (Ca+Zn)/P of pure titanium surface coating and biological activity of osteoblasts].

Purpose: To study osteoblast (MC3T3-E1 cells) adhesion, proliferation and differentiation activity on the surface of pure titanium with different (Ca+Zn)/P ratios, and determine Ca, P, Zn contents offering best biological activity on pure titanium surface.

Methods: In the micro-arc oxidation electrolyte, Ca, P with a certain concentration, and 5 different concentrations of Zn (0, 0.01, 0.

[Study of relationship between different contents of zinc and antibacterial activity on calcium phosphate coating modified by plasma electrolytic oxidation method].

Purpose: Calcium phosphate activity coating containing different contents of zinc was deposited onto the surface of pure titanium modified by plasma electrolytic oxidation. The physical and chemical properties of different contents of zinc were compared among three groups, and the influence on antibacterial activity of P.gingivalis (Pg) and A.

Correlation of computed tomography angiography parameters and shock index to assess the transportation risk in aortic dissection patients.

Background: Aortic dissection (AD) is a serious, life-threatening disease. It is currently crucial for AD patients to be transferred to a specialised hospital in a safe and timely manner. For this reason, the search for clinical and imaging changes related to transportation risk is becoming increasingly important.

[A clinical retrospective analysis of dental implants replaced in previously failed sites].

Purpose: To evaluate the clinical outcomes as well as related factors of dental implants replaced in previously failed sites.

Methods: A total of 12 patients (15 implants) who received replacement in previously failed sites during January 2005 to December 2011 were included. Outcomes of redo-implants were collected and clinical data was recorded and analyzed regarding risk factors related to redo-implants' survival using SPSS13.

[An assessment of different crown-to-implant ratio for implant teeth in the posterior region over 5 years].

Purpose: To evaluate the influence of crown-to-implant ratio (C/I ratio) on the results of restoration in the posterior region.

Methods: From January 2007 to January 2012,119 patients with 208 ITI implants in the posterior region were followed up for 6-66 months. Implant restorations were divided into three groups according to their respective clinical C/I ratios after noble porcelain-fused-to-mental crown restoration: C/I ≤1,1 View Article and Find Full Text PDF

[The antibacterial properties of Ca and Zn-containing coatings prepared with micro-arc oxidation].

Purpose: To prepare Ca and Zn-containing coatings using micro-arc oxidation on pure titanium surface and to investigate the coatings effect on S.mutans adhesion and morphology.

Methods: Five groups including low Ca-containing (L-Ca), high Ca-containing (H-Ca), low Zn-containing (L-Zn), medium Zn-containing (M-Zn), high Zn-containing (H-Zn) were prepared with micro-arc oxidation on titanium surface and machined commercial pure titanium (CP) was used as control group.

[Implant-supported overdenture after pectoralis major myocutaneous flap reconstruction of tongue/floor of the mouth cancer:a case report].

Patients with oral cancer, undergoing ablative surgery, were left with severe deformities and dysfunction. Although the defect can be repaired by flap transplantation, there were still difficulties to restore normal oral structure and function of the oral cavity. In these instances, rehabilitation of mastication and occlusion is of the utmost importance.

Histomorphometrical and clinical study of connective tissue around titanium dental implants with porous surfaces in a canine model.

Connective tissue (CT) reactions and collagen fiber orientation were evaluated on titanium implants with porous surfaces made by a laser method. Three groups in which the diameters of pores were 10 ± 5 µm, 40 ± 5 µm, and 70 ± 5 µm were involved in this test, together with a machined group as control. A total of 24 implants were randomly placed in mandibles after 3 months of premolars and the first molar extraction in beagle dogs.

[Effect of HA/TiO2 coating titanium surface on the growth of MG63].

Purpose: To evaluate the bioactivity of titanium surface treated by micro-arc oxidation (MAO) combined with ion beam assisted deposition (IBAD).

Methods: Titanium surfaces were treated by machined(S0), micro-arc oxidation(S1) and micro-arc oxidation combined with IBAD(S2), respectively. The topography and roughness of surfaces were determined by profilometer, and the bioactivity of the surface was evaluated by CLSM, MTT assay and ALP activity of cells.

[Effects of TCP/HA-coating titanium on the adhesion behavior of human gingival fibroblasts].

Objective: To investigate effects of hydroxyapatite (HA) and porous tricalcium phosphate/hydroxyapatite (TCP/HA)-coating titanium on the adhesion behavior of human gingival fibroblasts (HGFs).

Methods: Coatings of HA and duplex phases TCP/HA on titanium (Ti) were formed by ion beam assisted deposition (IBAD) method. Attachment, spreading, extracellular matrix (ECM) production, and focal adhesion plaque formation of HGFs were investigated on commercially pure (CP) titanium, HA-coated CP titanium and porous TCP/HA-coated CP titanium.

[Microcosmic analysis of TCP/HA coating with micro-pores on titanium by IBAD method.].

Purpose: In order to improve the biocompatibility of dental implants, the physical structure and the chemical composites of tricalcium phosphate/hydroxyapatite(TCP/HA) coating on titanium were studied.

Methods: Coatings of TCP/HA and hydroxyapatite (HA) on titanium were formed by ion beam assisted deposition (IBAD) method. The scanning electron microscope (SEM) and atomic force microscope (AFM) were used to study the morphology of the coating surfaces.

[Human gingival epithelial cells cultured by a combined method of serum containing medium and serum free medium].

Objective: To search for a simple and rapid cell culture method for human gingival epithelial cells with a high success rate.

Methods: Culture medium containing serum has been proved to have the ability of accelerating the early adhesion of human gingival tissue blocks, and the migration of gingival epithelial cells from the rim of the blocks. By means of this, we introduced the serum containing DMEM to the cell culture medium within the first 7-10 days, and changed with serum free cell culture medium to accelerate the mitosis, proliferation, and migration of the gingival epithelial cells, which had moved out from the tissue blocks.

[Location and negotiation of second mesiobuccal canals in maxillary molars].

Objective: To investigate prevalence, location, negotiation and the effect of operating microscope (OM) in the treatment of the second mesiobuccal canal (MB2) in maxillary molars.

Methods: 113 maxillary molars were studied. The crowns of the teeth were removed 1 mm above the chamber bottom for searching MB2 canal.