832 results match your criteria Australian Orthodontic Journal[Journal]


Orthodontic considerations for impacted and ectopic teeth.

Authors:
Richard J Olive

Aust Orthod J 2017 Feb;Spec No:99-104

This review article describes the changing approach to the management of various impacted teeth. Currently, more third molars are being retained, and it is likely that more patients will develop impactions than a generation ago because of non-extraction orthodontic treatment plans. There are still valid reasons for the surgical removal of selected third molars during the teenage years, during which time impaction can be anticipated to avoid the higher rate of morbidity associated with later removal. Read More

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February 2017
1 Read

Management of missing mandibular second premolars: a review.

Aust Orthod J 2017 Feb;Spec No:87-98

Tooth agenesis is the most common developmental dental anomaly and it is frequently associated with other dento-skeletal disturbances, such as structural variations of other teeth, late dental eruption, transpositions and crowding. Except for the third molars, the mandibular second premolars are the most commonly missing teeth. Oral rehabilitation of patients with missing mandibular premolars often requires a multi-disciplinary approach, and usually results in prolonged treatment time and a greater burden of care. Read More

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February 2017
3 Reads

3D facial and dento-alveolar imaging.

Aust Orthod J 2017 Feb;Spec No:73-86

This article reviews three-dimensional (1D) surface scanning contrasted with 3D imaging. Precise techniques are now available for capture of the face and craniofacial structures as well as improved introoral scanning for the production of virtual 3D casts of the dentition. Facial and intraoral scanners have established an accuracy that makes them viable for use in the clinical and research arenas. Read More

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February 2017

What is the truth behind the smile?

Aust Orthod J 2017 Feb;Spec No:65-72

A number of arguments surround orthodontics and orthodontic treatment and this article aims to discuss the current thinking and evidence base associated with these controversies. Read More

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February 2017
2 Reads

Brackets, epitopes and flash memory cards: a futuristic view of clinical orthodontics.

Authors:
Milton R Sims

Aust Orthod J 2017 Feb;Spec No:56-64

Orthodontics continues to be a profession anchored in traditional technology using appliances that cause inflammatory periodontal ligament (PDL) responses. Existing concepts of biological tooth movement based largely on histological tissue observations and the application of physical principles require major reassessment. In the next millennium, the genome revolution and knowledge of protein production and control could lead to the genetic correction of dentofacial anomalies and pain-free, biomolecular methods of malocclusion correction and long-term stability. Read More

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February 2017

The history of dental hygienists in Australia and their use in orthodontic practice.

Authors:
Geoffrey Wexler

Aust Orthod J 2017 Feb;Spec No:52-55

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February 2017

Who says that child needs orthodontic treatment?

Authors:
T J Freer

Aust Orthod J 2017 Feb;Spec No:47-51

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February 2017

Orthodontics in general practice: part 1. Scope and limits related to orthodontic education.

Authors:
K Godfrey

Aust Orthod J 2017 Feb;Spec No:44-46

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February 2017

The role of the foundation in Australian Orthodontic education.

Aust Orthod J 2017 Feb;Spec No:40-43

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February 2017

Orthodontic Education.

Authors:
E Storey

Aust Orthod J 2017 Feb;Spec No:34-39

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February 2017

Australian Orthodontists: are they "with it".

Authors:
J K Hawkins

Aust Orthod J 2017 Feb;Spec No:30-33

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February 2017

Looking backwards into the Future of Orthodontics.

Authors:
J F Reading

Aust Orthod J 2017 Feb;Spec No:24-29

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February 2017

Minimizing publication bias.

Authors:
Michael Harkness

Aust Orthod J 2017 Feb;Spec No:22-23

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February 2017
1 Read

Chaos theory and fractals.

Authors:
B Mollenhauer

Aust Orthod J 2017 Feb;Spec No:9-21

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February 2017

True intrusion of maxillary first molars with zygomatic and palatal miniscrew anchorage: a case report.

Aust Orthod J 2016 Nov;32(2):233-240

The intrusion of the maxillary first molar is indicated when occlusal clearance is needed for prosthetic rehabilitation. Maxillary molar intrusion may be undertaken using skeletal anchorage systems to avoid complicated mechanics delivered by conventional intra-oral fixed appliances. In the present case report, the efficient use of orthodontic miniscrew anchorage by applying simple mechanics for true maxillary first molar intrusion is described. Read More

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November 2016
2 Reads

The Hawlix: a simple and aesthetic prosthetic- orthodontic retainer.

Aust Orthod J 2016 Nov;32(2):229-232

This report introduces the Hawlix, a hybrid thermoformed and cold-cured retainer. It was developed to overcome the limitations that modified Hawley retainers possess when used in patients with bounded saddles, attributable to dental trauma or hypodontia. The Hawlix can be used as an intermediate retainer while a patient is waiting to receive restorative treatment. Read More

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November 2016
2 Reads

Effectiveness of photographs of study models for IOTN scoring.

Aust Orthod J 2016 Nov;32(2):221-228

Aim: The aim'of the present study was to investigate whether the same orthodontic information can be obtained from study models or photographs of study models in order to assess the Index of Orthodontic Treatment Need (IOTN). The study also aimed to assess inter- and intra-examiner reliability in the assessment of orthodontic treatment need.

Sample: Thirty sets of start and finish study models, demonstrating a range of malocclusions, were non-randomly obtained from patients treated at the University of Manchester Dental Hospital. Read More

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November 2016

Short-term treatment effects of the quad-helix appliance on dentofacial morphology of hyperdivergent patients.

Aust Orthod J 2016 Nov;32(2):211-220

Objectives: The purpose of this study was to evaluate the effects of shor-term expansion treatment using the quad-helix appliance on dentofacial morphology in orthodontic patients presenting with a hyperdivergent facial pattern.

Methods: The treatment group consisted of 40 patients with a hyperdivergent facial pattern, who were treated for maxillary incisor crowding with a quad-helix appliance during the mixed dentition period. Lateral cephalograms taken at the start (TO) and end (TI) of the treatment were obtained as a course of care. Read More

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November 2016
2 Reads

The effects of blocking N/OFQ receptors on orofacial pain following experimental tooth movement in rats.

Aust Orthod J 2016 Nov;32(2):206-210

Objective: The aim of this study was to determine the effects of nociceptin/orphanin FQ peptide receptor (N/OFQ receptor) antagonist on orofacial pain induced by experimental tooth movement in rats.

Methods: A total of 36 male Sprague-Dawley rats weighing 200-300 g were divided into six groups: a control group, force group, force+saline intraperitoneal group, force+saline periodontal group, force+UFP-101 ([Nphe¹,Arg¹⁴,Lys¹⁵]N/OFQ-NH ₂ antagonist for N/OFQ receptor) intraperitoneal group, and force+UFP-1 01 periodontal group. Closed coil springs were ligated between the upper incisors and first molar to exert an orthodontic force (40 g) between the teeth. Read More

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November 2016
10 Reads

A computed tomographic, mixed dentition, space analysis comparison.

Aust Orthod J 2016 Nov;32(2):199-205

Introduction: A considered space analysis aims to predict the combined mesiodistal widths of unerupted permanent canine and premolars. A miscalculation can lead to the application of inadequate and irreversible treatments.

Objective: To assess the level of agreement between predictions generated by three methods (Moyers' predictive tables at the 50th and 75th percentiles and Tanaka-Johnston's equations) on the sum of unerupted teeth compared with measurements derived from cone beam computed tomography, considered in the present study as a 'gold standard'. Read More

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November 2016
5 Reads

Orthodontists and the thyroid gland.

Authors:
Keith Godfrey

Aust Orthod J 2016 Nov;32(2):193-198

This paper questions the adequacy of orthodontists' full appreciation of the issues associated with the routine prescription of extra- oral radiography, particularly that related to a high risk of thyroid gland exposure to ionising radiation. There does not appear to be adequate application of the ALARA principle in the consileration of justifiable options to minimise the cumulative effects of radiation exposure in young patients. Read More

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November 2016
2 Reads

Comparison of validity, repeatability and reproducibility of the Peer Assessment Rating (PAR) between digital and conventional study models.

Aust Orthod J 2016 Nov;32(2):184-192

Introduction: The validity, reliability and inter-method agreement of Peer Assessment Scores (PAR) from acrylic models and their digital analogues were assessed.

Method: Ten models of different occlusions were digitised, using a 3 Shape R700 laser scanner (Copenhagen, Denmark). Each set of models was conventionally and digitally PAR-scored twice in random order by 10 examiners. Read More

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November 2016
1 Read

Expression of neural crest markers by human embryonic stem cells: an introductory project.

Aust Orthod J 2016 Nov;32(2):175-183

Introduction: Neural crest cells make up a transient migratory population of cells found in all vertebrate embryos. Great advances have been made over the past 20 years in clarifying the molecular basis of neural crest induction and, although much still remains unclear, it appears that it is a process involving several factors acting at different stages of embryogenesis. In the future, an understanding of the precise mechanisms involved in orofacial development, even at the earliest stages, may well be of use to all clinicians interested in the management of these tissues. Read More

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November 2016
2 Reads

A comparative evaluation of ion release from different commercially-available orthodontic mini-implants - an in-vitro study.

Aust Orthod J 2016 Nov;32(2):165-174

Background: Titanium alloy mini-implants have become popular in recent times and have been extensively used and studied. Although corrosion resistance of orthodontic materials has always been of concern, this property has been the least explored. The present study aimed to assess the composition, surface characterisation and corrosion resistance of five commercially available mini-implants by assaying ion release in artificial saliva. Read More

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November 2016

A qualitative study of orthodontic screening and referral practices among dental therapists in New Zealand.

Aust Orthod J 2016 Nov;32(2):155-164

Background: Appropriate screening and referral is important in delivering effective and timely orthodontic treatment. In New Zealand, dental therapists are usually the initial contact for oral health care (including the assessment of malocclusion) in child and adolescent patients.

Objective: To investigate the orthodontic screening and referral practices of dental therapists in New Zealand. Read More

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November 2016
2 Reads

Correction of the transverse discrepancy-induced spontaneous mandibular protrusion in Class II Division 1 adolescent patients.

Aust Orthod J 2016 Nov;32(2):148-154

Background: A Class Il malocclusion is the most frequent sagittal skeletal disharmony presenting for orthodontic treatment. A transverse interarch discrepancy ITID) may be considered as a possible functional cause of a Class 11 relationship.

Objective: The purpose of the present study was to determine transverse interarch width dimensions before and after orthodontic therapy and their possible relationship with increased mandibular projection following treatment. Read More

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November 2016

Effects of strontium ranelate on sutural bone formation: a histological and immunohistochemical study.

Aust Orthod J 2016 Nov;32(2):139-147

Aim: Rapid maxillary expansion is performed to correct a skeletal transverse deficiency of the maxilla, which is a frequently- encountered orthodontic anomaly. Strontium ranelate (SrR) is a novel agent that has a dual action, involving anti-resorptive and bone-forming effects. The aim of this study was to evaluate the effects of systemically applied SrR on osteoblastic bone formation after maxillary expansion on the mid-palatal suture of rats using histological and immunohistochemical tests. Read More

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November 2016
1 Read

The Herbst appliance and the Activator: influence of the vertical facial pattern.

Aust Orthod J 2016 Nov;32(2):130-138

Aim: To compare the effects of the Herbst appliance and the Activator at the completion of two-phase treatment, with respect to the vertical facial pattern (VFP) and to identify possible predictors of treatment effect.

Materials And Methods: Pretreatment, post-treatment and overall cephalometric change data were used to assess the dental and skeletal effects. Results for the change in mandibular length were also compared with changes reported for an untreated external control group. Read More

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November 2016

The Stanley Wilkinson Oration.

Authors:
Sharon Lewin

Aust Orthod J 2016 May;32(1):114-8

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May 2016
1 Read

Fresh stirrings among statisticians: statistical commentary.

Authors:
Keith Godfrey

Aust Orthod J 2016 May;32(1):109-12

For some years there has been unrest in the statistical world regarding the use of the p-value. It has been indicated that the significance of p-values is open to question, which therefore reduces the ability to measure the strength of evidence. This paper examines the use and misuse of the p-value and recommends consideration in its application. Read More

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May 2016
1 Read

Long-term surgical-orthodontic management of hemimandibular hyperplasia.

Aust Orthod J 2016 May;32(1):97-108

Background: Hemimandibular hyperplasia (HH), also known as hemimandibular hypertrophy, is characterised by excessive unilateral three-dimensional growth of the mandible after birth. Vertical unilateral elongation of the mandible becomes clinically evident as a rare form of vertical facial asymmetry. Aberrant growth of the facial skeleton affects the developing dentition and the dental compensatory mechanism is usually unable to maintain optimal occlusal relationships. Read More

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May 2016
8 Reads

The efficacy of Hybrid Hyrax-Mentoplate combination in early Class III treatment: a novel approach and pilot study.

Aust Orthod J 2016 May;32(1):88-96

Introduction: The aim of the present study was to assess the skeletal, dental and soft tissue effects of a specific treatment protocol in consecutively treated patients who presented with a Class III malocclusion. Treatment involved the use of a Hybrid Hyrax (HH) in the maxilla, a Mentoplate in the mandible and the application of continuous intra-oral Class III elastics.

Method: The treated group was comprised of seven males and seven females (mean pretreatment age 10. Read More

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May 2016
72 Reads

Invisalign treatment of lower incisor extraction cases.

Authors:
Tony Weir

Aust Orthod J 2016 May;32(1):82-7

Aim: To demonstrate the use of the Invisalign appliance in lower incisor extraction cases.

Method: Twelve patients, consecutively treated by the removal of a single lower incisor and Invisalign appliances, were selected from the author's private practice. Pretreatment, treatment and post-treatment photographic records were obtained and are presented. Read More

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May 2016
7 Reads

Changes in mandibular position in treated Class II division 2 malocclusions in growing and non-growing subjects.

Aust Orthod J 2016 May;32(1):73-81

Objective: To determine changes in mandibular position after the treatment of patients presenting with Class II division 2 malocclusions and to test the null hypothesis that there is posterior displacement of the mandible in these patients, in comparison with a control group of Class II division 1 subjects.

Materials And Methods: The assessed data consisted of pre- and post-treatment cephalometric radiographs of 77 subjects identified with Class II division 1 and Class II division 2 malocclusions matched according to age, gender and treatment duration. All completed fixed appliance orthodontic treatment. Read More

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May 2016
77 Reads

The effect of benzocaine and ketoprofen gels on pain during fixed orthodontic appliance treatment: a randomised, double-blind, crossover trial.

Aust Orthod J 2016 May;32(1):64-72

Aims: To compare the analgesic effect of topical benzocaine (5%) and ketoprofen (1.60 mg/mL) after 2 mm activation of 7 mm long delta loops used for maxillary en-masse orthodontic space closure.

Subjects And Methods: Twenty patients (seven males, 13 females, 15-25 years of age, mean age of 19. Read More

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May 2016
25 Reads

Orthodontists' and laypeople's perception of smile height aesthetics in relation to varying degrees of transverse cant of anterior teeth.

Aust Orthod J 2016 May;32(1):55-63

Aims: To determine the effect of varying the transverse cant of the anterior teeth on orthodontists' and laypeople's perceptions of smile aesthetics, and the influence that smile height has on this perception.

Materials And Methods: A 20-year-old Chinese female with an aesthetic smile and normal occlusion was chosen and agreed to participate. Digital pictures of her posed smile were taken and manipulated to create three smile height variations: low, medium, or high. Read More

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May 2016
6 Reads

Cephalometric assessment of soft tissue morphology of patients with acromegaly.

Aust Orthod J 2016 May;32(1):48-54

Aim: To assess the sagittal soft tissue morphology of patients with acromegaly in comparison with a healthy control group.

Methods: Twenty-seven patients with acromegaly (11 male, 16 female; mean age 47.3 ± 11. Read More

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May 2016
23 Reads

Comparison of traditional orthodontic polishing systems with novel non-orthodontic methods for residual adhesive removal.

Aust Orthod J 2016 May;32(1):41-7

Background: Following the debonding of orthodontic brackets, the removal of residual adhesive from the enamel surface is required. Published adhesive removal protocols present conflicting advice.

Aims: The present study evaluated the surface roughness of enamel after debonding and instrumentation with non-traditional orthodontic polishing systems. Read More

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May 2016
13 Reads

A comparison of the sagittal and vertical dentofacial effects of maxillary expansion produced by a memory screw and a hyrax screw.

Aust Orthod J 2016 May;32(1):31-40

Aim: The aim of the present study was to investigate and compare the cephalometric effects of a conventional Hyrax expansion screw and a memory screw on the skeletal and dentoalveolar structures and soft tissues of the face.

Methods: Thirty-two patients with a maxillary transverse deficiency were divided into two groups. A memory-screw group included 17 patients (nine females and eight males), while a Hyrax-screw group was comprised of 15 patients (eight females and seven males). Read More

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May 2016
4 Reads

Effect of bromelain and papain gel on enamel deproteinisation before orthodontic bracket bonding.

Aust Orthod J 2016 May;32(1):23-30

Aim: To test the hypothesis that enamel surface deproteinisation with different concentrations of bromelain in association with 10% papain increases the shear bond strength (SBS) of brackets bonded with orthodontic composite and resin modified glass ionomer cement (RMGIC).

Materials And Methods: Orthodontic brackets were attached according to the following protocols to 195 bovine incisors, which were acquired and divided into 13 groups: 1) Transbond XT (TXT) according to the manufacturer's recommendations; 2) Deproteinisation with 3% bromelain (BD) plus 10% papain and TXT; 3) 6% BD plus 10% Papain and TXT; 4) RMGIC, without enamel deproteinisation and without acid etching; 5) RMGIC, with 3% BD plus 10% papain and without acid etching; 6) RMGIC, with 6% BD plus 10% papain and without acid etching; 7) attachment using RMGIC following etching with polyacrylic acid; 8) 3% BD plus 10% papain, attachment using RMGIC and etching with polyacrylic acid; 9) 6% BD plus 10% papain, and attachment using RMGIC following etching with polyacrylic acid; 10) etching with 37% phosphoric acid and attachment using RMGIC; 11) 3% BD plus 10% papain, etching with 37% phosphoric acid and attachment using RMGIC; 12) 6% BD plus 10% papain, etching with 37% phosphoric acid and attachment using RMGIC; 13) deproteinisation with 2.5% sodium hypochlorite (NaOCl), etching with polyacrylic acid and RMGIC. Read More

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May 2016
36 Reads

Porcelain surface conditioning protocols and shear bond strength of orthodontic brackets.

Aust Orthod J 2016 May;32(1):18-22

Aim: The objective of the present study was to determine which of six bonding protocols yielded a clinically acceptable shear bond strength (SBS) of metal orthodontic brackets to CAD/CAM lithium disilicate porcelain restorations. A secondary aim was to determine which bonding protocol produced the least surface damage at debond.

Methods: Sixty lithium disilicate samples were fabricated to replicate the facial surface of a mandibular first molar using a CEREC CAD/CAM machine. Read More

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May 2016
4 Reads

Three-dimensional computed tomographic assessment of mandibular muscles in growing subjects with different vertical facial patterns.

Aust Orthod J 2016 May;32(1):2-17

Aim: The present study was undertaken to assess the relationship between the mandibular muscles and dentofacial skeletal morphology in children with different underlying vertical facial patterns, using three-dimensional computed tomography (3D-CT).

Method: Thirty children (mean age 12.24 ± 1. Read More

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May 2016
1 Read

Rules for some?

Authors:
Craig Dreyer

Aust Orthod J 2016 May;32(1)

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May 2016
1 Read

Class III orthognathic surgical cases facilitated by accelerated osteogenic orthodontics: a preliminary report.

Aust Orthod J 2015 Nov;31(2):226-35

Objectives: To describe a multidisciplinary treatment approach that includes corticotomy, orthodontic force and orthognathic surgery for the management of skeletal Class III surgical cases. The main advantage of the combined techniques is a reduction in treatment time for young adult patients.

Method: Accelerated Osteogenic Orthodontics (AOO) was delivered to three young adult patients during their pre-surgical orthodontic treatment. Read More

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November 2015
10 Reads

Multi-disciplinary management of a patient with a post-traumatised incisor presenting concurrent replacement and inflammatory resorption: a case report.

Aust Orthod J 2015 Nov;31(2):216-25

This case report describes the multidisciplinary management of a young male who presented with a Class I incisor relationship and bi-maxillary dento-alveolar protrusion on a Class I skeletal base. The occlusion was complicated by an ankylosed and moderately infra-positioned upper left permanent central incisor, an anterior crossbite, crowding, a reduced overbite and centreline discrepancy. The incisor was traumatised and avulsed when the root was immature and the tooth was reimplanted with delay. Read More

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November 2015
14 Reads

Closure of an open bite using the 'Mousetrap' appliance: a 3-year follow-up.

Aust Orthod J 2015 Nov;31(2):208-15

Recently, skeletal anchorage devices have been used as anchorage units for upper molar intrusion as a way of correcting an anterior open bite malocclusion. To avoid the surgical procedures associated with the placement of miniplates in the zygomatic area, mini-implants may be inserted palatally or buccally in the alveolar process. However, consideration must be given to the potential risks of root damage and a higher failure rate associated with the placement of temporary anchorage devices (TADs) in the interradicular area. Read More

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November 2015
10 Reads

Bond strength and micro-computed tomographic evaluation of pre-coated brackets.

Aust Orthod J 2015 Nov;31(2):201-7

Objectives: The aim of the present study was to assess and compare the shear bond strength (SBS) of metal pre-coated orthodontic brackets bonded to fluorotic and non-fluorotic teeth treated with three different etching techniques. A second aim was to determine the volume of adhesive remaining on the tooth at debond using micro-computed tomography (μCT).

Methods: Ninety extracted premolars were selected to include 45 fluorotic (test group) and 45 non-fluorotic (control group) teeth. Read More

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November 2015
1 Read

The effect of the buccal corridor and tooth display on smile attractiveness.

Aust Orthod J 2015 Nov;31(2):195-200

Aims: The aim of the present study was to evaluate the lay perception of the effect of the buccal corridor and amount of tooth-gingival display on the attractiveness of a smile in different facial types.

Materials And Methods: Using Adobe Photoshop CS3 software, frontal facial images of two smiling Iranian female subjects (one short-faced and one long-faced) were altered to create different magnitudes of buccal corridor display (5, 10, 15, 20 and 25%) and tooth-gingival display (2 mm central incisor show, 6 mm central incisor show, total central incisor show, total tooth show with 2 mm gingival show and total tooth show with 4 mm gingival show). Sixty Iranians (30 males and 30 females) rated the attractiveness of the pictures on a 1-5 point scale. Read More

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November 2015
6 Reads

Skeletal effects of the alteration of masseter muscle function.

Aust Orthod J 2015 Nov;31(2):184-94

Aim: To investigate the effects of muscle denervation and the introduction of the β2-adrenoceptor agonist, formoterol, on the relationship between muscles and underlying skeletal growth.

Method: Thirty-one (4-week-old) male Sprague-Dawley rats were assigned to four groups: Surgical Sham; Denervated; Denervated + β2-agonist; and β2-agonist only. The Surgical Sham group had the left masseteric nerve exposed but not sectioned. Read More

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November 2015
21 Reads