Maxillary anterior segmental distraction osteogenesis to correct maxillary hypoplasia and dental crowding in cleft palate patients: a preliminary study.

Background: The aim of this study was to present comprehensive skeletal, dental and facial aesthetic outcomes and long-term stability of maxillary anterior segmental distraction osteogenesis (MASDO) for the treatment of maxillary hypoplasia in CLP.

Materials And Methods: Six patients with maxillary hypoplasia treated with MASDO by a miniscrew assisted intraoral tooth-borne distractor were included. Cephalometric radiographs were obtained before distraction (T1), after the consolidation period (T2) and after orthodontic treatment or before orthognathic surgery (T3).

Evaluation of the position and morphology of tongue and hyoid bone in skeletal Class II malocclusion based on cone beam computed tomography.

Background: The aim of the study was to analyze the morphology and position of the tongue and hyoid bone in skeletal Class II patients with different vertical growth patterns by cone beam computed tomography in comparison to skeletal Class I patients.

Methods: Ninety subjects with malocclusion were divided into skeletal Class II and Class I groups by ANB angles. Based on different vertical growth patterns, subjects in each group were divided into 3 subgroups: high-angle group (MP-FH ≥ 32.

Comparative study of three composite materials in bonding attachments for clear aligners.

Objective: The aim of this study was to assess the operation time, shear bond strength, placement accuracy and wear resistance of 3 composite materials (Filtek Z350XT, Filtek Z350XT Flowable and SonicFill) that were used to make attachments for clear aligners.

Settings And Sample Population: Laboratory of Stomatology of Shanghai Ninth People's Hospital affiliated to Shanghai Jiao Tong University School of Medicine. A total of 129 human mandibular premolars were collected, 69 of which were assigned to 3 groups (A1, B1 and C1).

Cone-beam CT evaluation of temporomandibular joint in permanent dentition according to Angle's classification.

Objectives: To compare characteristics of temporomandibular joint (TMJ) and related structures according to Angle class I, II, II, and III.

Methods: 123 Chinese patients (13-36 years old, 60 males, and 63 females) were classified in four groups according to Angle's classification: skeletal class I (31 patients), skeletal class II division 1 (30 patients), skeletal class II division 2 (30 patients), and skeletal class III (32 patients). Left and right TMJs of each subject were evaluated independently with cone-beam computed tomography (CBCT).

[Comparison of skeletal structure of temporomandibular joint through cone-beam CT between Angle ClassⅠ, Ⅱ, Ⅱ, Ⅲ malocclusion patients with permanent dentition].

Purpose: To compare characteristics of temporomandibular joint and related structures according to gender and Angle Ⅰ, Ⅱ, Ⅱ and Ⅲ class.

Methods: Cone-beam CT (CBCT) was performed in 123 patients with malocclusion, and three-dimensional reconstruction was performed with Mimics 19.0 software.

Metabolic effects and safety of Roux-en-Y gastric bypass surgery vs. conventional medication in obese Chinese patients with type 2 diabetes.

Aim: To assess metabolic effects and safety of Roux-en-Y gastric bypass (RYGB) versus conventional medication (CM) in obese Chinese patients with type 2 diabetes (T2DM).

Methods: This retrospective cohort study included 40 patients who underwent RYGB (mean age 44.1 years, body mass index [BMI] 33.

Study on Tooth Movement After the Alveolar Bone Grafting in Patients With Unilateral Cleft Lip and Palate.

Objectives: The aim of the study was to explore the effectiveness of the cleft-adjacent teeth moved into the grafted alveolar bone in unilateral cleft lip and palate (UCLP) patients, and to evaluate the alveolar bone support of the teeth.

Methods: Twenty unilateral cleft lip and palate patients were recruited in this study. The average age was 12 years and 8 months.

[A study on effects of unilateral maxillary canine impaction on the dento-maxillofacial three-dimensional structure].

Purpose: To investigate the three-dimensional structure characteristics of unilateral impacted teeth by cone-beam CT (CBCT), and to evaluate the risk factors for upper impacted teeth, so as to provide evidence for early clinical intervention in orthodontics.

Methods: Thirty patients with unilateral maxillary canine impaction were included. Their CBCT images were measured by three-dimensional reconstruction of Romexis software.

[Features and influence of impacted maxillary permanent canine on surrounding structures].

Impacted maxillary permanent canine is the tooth that most commonly fails to erupt after the third molars. It can probably affect the dental arch alignment and form, occlusal function and facial profile as well. In this review, the epidemiology, etiology and influence on surrounding tissue of the impacted maxillary permanent canine were analyzed based on related literatures with the hope of providing references for clinical practice.

[Torque control evaluated by lateral cephalometric radiography and cone-beam CT after retraction of the upper anterior teeth].

Purpose: To investigate the relationship between torque control and movement type of the teeth and to investigate the correlation between reconstruction of the alveolar bone and retraction of the upper anterior teeth.

Methods: Cephalograms of pre-treatment and post-treatment of 111 cases and cone-beam computed tomography of pre-retraction and post-retraction of 7 cases were collected. The inclination degree of the upper anterior teeth, the horizontal and vertical displacement of edge and apex,and the thickness of the alveolar bone at the apex level were measured.

Bond strength of metal brackets bonded to a silica-based ceramic with light-cured adhesive : Influence of various surface treatment methods.

Objective: The purpose of this work was to evaluate the effects of several surface treatment methods on the shear bond strengths of metal brackets bonded to a silica-based ceramic with a light-cured adhesive.

Materials And Methods: Silica-based ceramic (IPS Classic(®)) with glazed surfaces was cut into discs that were used as substrates. A total of 80 specimens were randomly divided into four groups according to the method used: 9.

Myricetin Prevents Alveolar Bone Loss in an Experimental Ovariectomized Mouse Model of Periodontitis.

Periodontitis is a common chronic inflammatory disease, which leads to alveolar bone resorption. Healthy and functional alveolar bone, which can support the teeth and enable their movement, is very important for orthodontic treatment. Myricetin inhibited osteoclastogenesis by suppressing the expression of some genes, signaling pathways, and cytokines.

Rapid maxillary expansion in alveolar cleft repaired with a tissue-engineered bone in a canine model.

This study aims to investigate the effects of orthodontic expansion on graft area of a tissue-engineered bone (TEB) BMSCs/β-TCP, and to find an alternative strategy for the therapy of alveolar cleft. A unilateral alveolar cleft canine model was established and then treated with BMSCs/β-TCP under rapid maxillary expansion (RME). Sequential fluorescent labeling, radiography and helical computed tomography were used to evaluate new bone formation and mineralization in the graft area.

[The relationship between the movement type during retracting the anterior teeth and the external apical root resorption and its evaluation methods].

External apical root resorption was a common phenomenon associated with orthodontic treatment. The reported incidence ranged from 0% to 100%. It was caused by several factors, which could be mainly divided into biological and mechanical aspects.

Shear bond strength of an experimental composite bracket.

Objective: The in vitro shear bond strength of MZ100 brackets (an experimental composite bracket developed by the Dental Biomaterial Laboratory at Boston University) and the effect of different treatment methods on these brackets were evaluated.

Materials And Methods: As the bonding substrates, 80 Vitablocs® Mark II (Vident, Brea, CA, USA) were chosen. Three treatment methods were employed on 60 MZ100 bracket bases (20 brackets per treatment): silane coupling agent (Porcelain Primer; Ormco, Orange, CA, USA), sandblasting (Basic Professional Model Sandblaster; Renfert GmbH, Germany), and non-treatment.

[Research on Chinese orthodontic specialists' subjective evaluation of orthodontic treatment outcome].

Objective: To analyze the results of multiple Chinese orthodontic specialists' subjective evaluation of orthodontic treatment outcome, to investigate the relevance of different experiment items and to explore the weight of each monomial material.

Methods: As a randomized clinical trial, with six orthodontic treatment centers and Angle's classification being regarded as two stratification factors, it contained 108 cases with integrity data, which was random extracted from 2383 cases that received orthodontic treatment in six orthodontic treatment centers during the past five years, gathering post-treatment study casts, cephalometrics and photographs of 48 cases as the research subject. Similarly taking Angle's classification as a stratification factor, 108 cases were randomly divided into 9 groups.

Impact of rapid maxillary expansion in unilateral cleft lip and palate patients after secondary alveolar bone grafting: review and case report.

The purpose of this article was to analyze the effects and short-term stability of rapid maxillary expansion performed after secondary alveolar bone grafting in unilateral cleft lip and palate (UCLP) patients. Two UCLP patients with severe maxillary constriction who had previous bone grafting were involved in this study. A hyrax rapid expansion appliance was placed on 4 abutment teeth and activated twice daily.

[Review of the impact of orthodontic treatments on soft tissue profile].

There are some people who have demands on the soft tissue profile among the patients who search for even teeth.On the other hand,when drawing up a plan,orthodontists will consider the soft tissue analysis.This review is focused on the assessment way of soft tissue profile,impact of orthodontic treatments such as functional appliances, extraction treatment, etc on the profile.

[Presurgical alveolar molding using computer aided design in infants with unilateral complete cleft lip and palate].

Purpose: To establish a new method of presurgical alveolar molding using computer aided design(CAD) in infants with complete unilateral cleft lip and palate (UCLP).

Methods: Ten infants with complete UCLP were recruited. A maxillary impression was taken at the first examination after birth.

[Study on the teaching mode and quality management of orthodontic education in undergraduates].

Orthodontic teaching, especially in undergraduates is the most difficult part in dental education, not only on the aspect of theoretical teaching covering a wide range of disciplines in limited teaching hours, but also their application in clinical practice. With the aim of training qualified dental practitioner with global competitiveness, improving the quality of training curriculum, the Orthodontic Department of Shanghai Jiao Tong University College of Stomatology has persisted in researching and reforming the teaching system. This paper described the current situation of orthodontic teaching and the concept of quality management.

ERBB2 gene amplification in oral squamous cell malignancies: a correlation with tumor progression and gene expression.

Objectives: Chromosomal instability is hallmark of carcinoma. Amplification of chromosome 17q11-q12 is present in some oral squamous cell cancer (OSCC) cases. In this study, we investigated the copy number variations of ERBB2 gene, which is located at this locus in collected OSCC samples and their correlation with tumor progression and gene expression.

Orthodontic tooth movement in alveolar cleft repaired with a tissue engineering bone: an experimental study in dogs.

Tissue engineering approaches have been successfully used in repairing bone defects and have become a viable alternative to autologous bone. The aim of the present study was to investigate if a construct of porous beta-tricalcium phosphate (β-TCP) combined with osteogenically induced bone marrow stromal cells (bMSCs) could repair alveolar cleft, and allow for subsequent orthodontic tooth movement in a canine model. Twelve alveolar osteotomy surgeries in six animals were made bilaterally and randomly implanted by (1) tissue-engineered bone complex of bMSCs/β-TCP (group A, n=4), (2) β-TCP alone (group B, n=4), and (3) autologous bone obtained from iliac bone (group C, n=4).

A novel technique for presurgical nasoalveolar molding using computer-aided reverse engineering and rapid prototyping.

Objective: To establish a new method of presurgical nasoalveolar molding (NAM) using computer-aided reverse engineering and rapid prototyping technique in infants with unilateral cleft lip and palate (UCLP).

Methods: Five infants (2 males and 3 females with mean age of 1.2 w) with complete UCLP were recruited.

[Presurgical nasoalveolar molding in the treatment of infants with bilateral complete cleft lip and palate].

Purpose: To evaluate the curative effect of presurgical nasoalveolar molding (NAM) in the treatment of infants with bilateral complete cleft lip and palate (BCLP).

Methods: Nine infants with BCLP were included. Presurgical alveolar molding was used to bring the premaxilla back into proper alignment with the lateral segments in the maxilla arch.

Sagittal maxillary growth in patients with unoperated isolated cleft palate.

Objective: To examine the sagittal maxillary growth during mixed and permanent dentition in patients with unoperated isolated cleft palate.

Patients: A total of 41 patients with nonsyndromic unoperated isolated cleft palate, 16 with mixed dentition and 25 with permanent dentition.

Main Outcome Measures: Cephalograms were analyzed to compare these patients with those with isolated cleft palate who had been repaired operatively as well with normal individuals.