A new type of modified Essix Retainer for anterior open bite retention.

The most problematic malocclusion type to retain is anterior open bite although many classical retention appliances are known. The difficulty of maintaining the occlusion arises from the lack of control over the tongue behavior and posture in open bite cases. In the current article, a 2 year follow-up of 2 open-bite patients who were retained with a new type of retention appliance, successfully, were presented.

Effects of sandblasting and silica coating on the bond strength of rebonded mechanically retentive ceramic brackets.

Introduction: The aim of this study was to determine the bond strength of rebonded mechanically retentive ceramic brackets after treatment with 2 abrasive techniques.

Methods: In addition to a group of new brackets, 3 groups were treated according to the following conditions of debonded ceramic bracket bases: sandblasting, sandblasting + silane, and silica coating + silane (15 in each group). Treated ceramic brackets were rebonded on premolars.

Orthodontic bonding to several ceramic surfaces: are there acceptable alternatives to conventional methods?

Introduction: The objectives of this study were to determine the effects of various surface conditioning methods on 3 types of ceramic materials (feldsphatic, leucite-based, and lithia disilicate-based) in orthodontic bonding.

Methods: A total of 210 ceramic disk samples were fabricated and divided into 3 groups. In each group, 5 subgroups were prepared by sandblasting; sandblasting and hydrofluoric (HF) acid; sandblasting and silane; sandblasting, HF acid, and silane; and tribochemical silica coating and silane.

Two different applications of Class II elastics with nonextraction segmental techniques.

Objective: To evaluate the relative effects of Class II elastics applied directly with utility arches (UAs) or with the Reciprocal Mini-Chin Cup (RMCC) appliance.

Materials And Methods: Thirty patients with Class II division 1 malocclusion were included. Fifteen of them were treated with the RMCC appliance and the other 15 treated with Class II elastics on UAs.

The effect of food simulants on porcelain-composite bonding.

Purpose: The purpose of this study was to evaluate the in vitro effects of food simulants on the bond strength of brackets to porcelain surfaces.

Materials And Methods: One hundred and eighty porcelain-fused to metal specimens were fabricated. Samples were divided into 3 groups including 60 specimens each.

Short-term effect of mastic gum on salivary concentrations of cariogenic bacteria in orthodontic patients.

Objective: To determine antibacterial activity of chewing mastic gum against the salivary levels of Streptococcus mutans, the total number of viable bacteria, and lactobacilli in patients undergoing therapy with fixed orthodontic appliances.

Materials And Methods: In this study, the levels of S mutans, lactobacilli, and total cultivated bacteria were measured before and after chewing mastic gum. The antibacterial effects of chewing mastic gum against these microorganisms in saliva were compared with a placebo gum.

Multidisciplinary approach to the rehabilitation of a crown-root fracture with original fragment for immediate esthetics: a case report with 4-year follow-up.

Dental practitioners frequently encounter dentoalveolar traumas. According to the severity of the trauma, a large spectrum of complications such as isolated tooth fracture, dentoalveolar fracture or fracture at maxillofacial region may occur. If the isolated tooth fracture occurs particularly at anterior region, the rehabilitation should satisfy both esthetic and functional problems.

Porcelain surface treatment by laser for bracket-porcelain bonding.

Introduction: The purposes of this study were to investigate the effect of laser irradiation on the adhesion of brackets bonded to feldspathic porcelain and to compare it with brackets bonded with conventional techniques.

Methods: One hundred porcelain-fused-to-metal specimens were divided into 10 groups of 10. The treatment groups were sandblasted (SB), sandblasted with silane (SB+S), orthophosphoric acid (OFA), orthophosphoric acid with silane (OFA+S), hydrofluoric acid (HFA), hydrofluoric acid with silane (HFA+S), laser etched (L), laser etched with silane (L+S), glazed (Control 1/C1), and deglazed (Control 2/C2).

Tooth-size ratio for patients requiring 4 first premolar extractions.

Introduction: The relationship between total mesiodistal widths of the maxillary and mandibular teeth is an important factor in orthodontic treatment planning. The purposes of this article are to report a mathematical tooth-size ratio specifically designed for patients needing the extraction of 4 first premolars and to compare the anterior "6" and overall "12" ratio values reported by Bolton with the calculated anterior "6" and overall "10" ratio values obtained from data in this study.

Methods: This study was conducted in 3 phases.

Multidisciplinary approach for the rehabilitation of dentoalveolar trauma.

Satisfactory dental rehabilitation of dentoalveolar trauma requires intense effort and time. Usually multidisciplinary treatment planning and teamwork are necessary to deal with multitask problems associated with these cases. Dental implants have been successfully used for replacement of missing teeth, but in trauma cases insufficient alveolar bone hinders implantation.

Asymmetric maxillary expansion (AMEX) appliance for treatment of true unilateral posterior crossbite.

The aim of this study was to evaluate the effects of an asymmetrical maxillary expansion (AMEX) appliance. Patients with true unilateral posterior crossbites were included in the study. The treatment group consisted of 18 patients who had a mean age of 14 +/- 2.