Features of Idiopathic Halitosis and Its Association With Low-Grade Systemic Inflammation.

Objectives: Idiopathic halitosis is occasionally encountered in clinical practice, yet with scarce reports. This work aimed to investigate its features and potential association with low-grade systemic inflammation (LGSI).

Methods: This retrospective study reviewed idiopathic halitosis from 2469 halitosis patients and compared them with 63 healthy controls (HCs).

[Use of digital image correlation method to measure polymerization shrinkage dynamics of light cured composite resin].

Purpose: To evaluate the role of digital image correlation method in measuring the initiation and propagation of polymerization shrinkage of light cured composite resin.

Methods: Six freshly extracted complete molars were collected and divided into 2 groups randomly. The proximal surface was sliced to plane and proximal-occlusal cavity were prepared with 2.

[Application of digital photography in color matching of porcelain restoration in special color teeth].

Purpose: To evaluate the clinical application of digital photography in special color teeth, and to explore the role and the problems s of digital photos to improve cosmetic effect.

Methods: Digital photography combined visual color-matching was applied in 50 cases with special color teeth in ceramic restorations selected randomly. Then the satisfactory degree of the patients and dentists was evaluated and the value of L*a*b* between prosthesis and its neighbors was collected by self-developed software Dental ImgShop.

[DT Light-Post system for prosthodontic treatment of residual root and crown teeth].

Purpose: To evaluate the clinical effect of DT Light-Post system in prosthodontic treatment for the residual root and crown.

Methods: 193 patients with 287 anterior teeth and premolars were involved, including 195 residual crowns and 92 residual roots. After complete root canal therapy, the teeth were treated with DT Light-Post system and all-ceramic crowns.

[Influence of different amount of silane coupling agent on the flexural strength of PMMA/nanometer ZrO2 composites].

Purpose: To study the influence of different amount of silane coupling agent Z-6030 on the flexural strength of PMMA/nanometer ZrO(2) composites.

Methods: Nanometer ZrO(2) particles were modified by silane coupling agent Z-6030 with different percentages.In situ polymerization method was used to combine PMMA/ nanometer ZrO(2) composites of denture base plate.

[Clinical analysis of colour distribution in tetracycline teeth].

Purpose: To analyze the colour range and distribution of tetracycline teeth, and the difference from normal teeth.

Methods: 142 cases with 468 anterior tetracycline teeth and 100 cases with 200 normal anterior teeth were collected. The color was measured by a computer-aided Shade-Eye NCC colorimeter, and expressed in terms of 3 coordinate values (L,a,b) of the CIE-1976-Lab color system.