Left atrial appendage filling defects restricted to the early phase of cardiac computed tomography is significantly associated with ischemic stroke.

Purpose: To investigate the relationship between filling defects in the left atrial appendage restricted to the early phase of cardiac computed tomography (CCT), and ischemic stroke in patients with atrial fibrillation (AF).

Materials And Methods: A total of 152 patients with non-valvular AF were retrospectively enrolled and divided into two groups according to the stroke history, as confirmed by brain computed tomography (CT) or magnetic resonance imaging (MRI), as the non-stroke group (n = 89) and stroke group (n = 63), respectively. The numbers of patients with filling defects in the early phase of CCT images without thrombi were recorded.

[Comparison of two-year stability between immediate implant action and delayed implantation for anterior teeth with periodontal disease].

Purpose: To investigate the feasibility of immediate implantation after extraction of anterior teeth in patients with periodontal disease and its clinical effect within 2 years.

Methods: Thirty patients (36 implants) who underwent anterior dental implant treatment for periodontal disease from 2016 to 2018 were randomly divided into immediate implantation group (17 implants) and delayed implantation group (19 implants). The patients were followed up for 2 years, the clinical parameters such as periodontal probing depth, pink esthetic score（PES）and implant neck bone resorption volume of implant neck were obtained.

[Esthetic analysis on immediate single-tooth implant restoration in anterior maxilla].

Purpose: To evaluate the esthetic outcomes of immediate single-tooth implant restoration in anterior maxilla with the pink esthetic score (PES).

Methods: Nine patients were treated with 9 Straumann implants by immediate single-tooth implant restoration in anterior maxilla. Assessment of PES after crown placement at 1 week (baseline) and 6 months after implantation was conducted.

[Quantitative analysis on guided bone regeneration-membrane technique with Bio-Oss in dental implantation].

Purpose: To measure the absorbed quantity of Bio-Oss by using dental CT scanning and measuring the variety of the volume of Bio-Oss.

Methods: Nine patients were preformed stage I surgery of dental implants and guided bone regeneration-membrane technique (GBR) simultaneously. These patients were scanned by dental CT at the end of 1-week, 3-month and 6-month after operation, respectively.