World journal of orthodontics (World J Orthod )

Publisher: World Federation of Orthodontists


World Journal of Orthodontics is focused on the busy orthodontic clinician: to provide avant-garde, evidence-based, clinically relevant information in the most efficient and effective manner. WJO will provide an open and active international forum between readers and world-class authors. An electronic version of the journal will aid and abet this cause. Special sections of the WJO will provide the active clinician with abstracts of pertinent research, latest advances in diagnostic armamentaria, and coverage of international orthodontic news and meetings. Incorporated The International Journal of Adult Orthodontics & Orthognathic Surgery since it was discontinued in 2002.

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  • Website
    World Journal of Orthodontics website
  • Other titles
    World journal of orthodontics (En ligne), WJO
  • ISSN
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  • Material type
    Document, Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

Publications in this journal

  • World journal of orthodontics 01/2010; 11.
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    ABSTRACT: To investigate the incidence and distribution of alveolar bony defects in the mandibular anterior area. A flap procedure was performed to expose the labial alveolar bone of the mandibular anterior area of 32 patients. The presence of alveolar defects including dehiscences and fenestrations were recorded. Seventy-eight percent (25) of the examined patients had at least one tooth with an alveolar bony defect. Dehiscences were found to be most commonly associated with the midline of the labial surface of mandibular left and right canines followed by the mesiolabial line of the same teeth. The structure and topography of alveolar bone should be considered prior to the treatment planning and tooth movement. Moreover, there is a tremendous need to develop a noninvasive precise method for diagnosing alveolar defects.
    World journal of orthodontics 02/2009; 10(1):16-20.
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    ABSTRACT: To compare the degree of intra- and interarch dentoalveolar asymmetry among patients with a normal occlusion, Class II Division 1 malocclusion, and Class II subdivision malocclusion. The sample comprised dental casts of 150 (72 males [ages 22. 1 +/- 3.11 and 78 females [ages 21.1 +/- 2.1]) normal occlusion subjects, 106 (45 males [ages 17.8 +/- 1.8] and 61 females [ages 16.5 +/- 2.91) Class II Division 1 patients, and 40 (18 males [ages 15.8 +/- 2.8] and 22 females [ages 15.2 +/- 3.3]) Class II subdivision malocclusions. Maxillary and mandibular reference lines were constructed and used for the intraarch asymmetry measurements. Thirty-six width measurements were performed on the dental casts of each subject. Analysis of variance (ANOVA) was used for comparisons of the groups, and Pearson's correlation coefficients were computed to determine the interarch associations. No statistically significant intra-arch asymmetry was found for maxillary and mandibular dental arch and alveolar width in any of the three groups. All variables were larger on the right side in the normal occlusion subjects. Further, the left side maxillary dental and alveolar arch width measurements were larger in the Class II Division 1 group. None of these differences, however, were statistically significant. In the Class II subdivision group, only the Class II sides' mandibular dental arch measurements were larger (P < .05). Maxillary and mandibular total dental arch and alveolar width dimensions differed among the groups (P < .001). Except for maxillary and mandibular canine alveolar width, opposing interarch dental and alveolar landmarks were significantly correlated with the transverse dimensions. Although some landmarks in the current study showed statistically significant and insignificant differences, the mean arithmetic differences were small, inconsistent, and not likely clinically important.
    World journal of orthodontics 02/2009; 10(1):7-15.
  • World journal of orthodontics 02/2009; 10(1):78-81.
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    ABSTRACT: The Class III malocclusion with mandibular prognathism and open bite can be a result of excessive mandibular growth, underdevelopment of the maxilla, environmental factors, and trauma to the jaws. Correction of this malocclusion can involve an orthodontic or a combined orthodontic-orthognathic approach. Skeletal asymmetries can complicate this situation, making treatment more difficult. This skeletal Class III deformity with skeletal open bite case presentation involves treatment with a combined orthodontic-bimaxillary orthognathic approach following rhinoplasty. In addition, the patient's postoperative skeletal and dental stability was well-maintained after 1 year postoperation.
    World journal of orthodontics 02/2009; 10(1):57-66.
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    ABSTRACT: To evaluate the shear bond strength in vivo and in vitro of metallic brackets bonded to human teeth with light-curing bonding material, using two types of light-curing units. Sixty human premolars were divided into six groups. In the GI and GII groups, the brackets were directly bonded to volunteers' maxillary and mandibular second premolars on the right and left sides, respectively, of their mouths. In the other groups, the brackets were bonded to extracted first premolars. The polymerization was performed in GI, GIII, and GV with an LED (light-emitting diode) device, while in GII, GIV, and GVI, a halogen light was used. In GI and GII, shear strength tests were conducted using a portable digital dynamometer placed directly in the patients' mouths. The teeth from GIII, GIV, GV, and GVI were stored in distilled water at 37 degrees C for 24 hours. Afterward, they were thermocycled between 5 degrees and 55 degrees C. Then, in GIII and GIV, a Universal Testing Machine was used; in GV and GVI, mechanical tests were performed with a digital dynamometer. The bracket/adhesive failure modes were evaluated with the Adhesive Remnant Index (ARI). The average values of the shear strengths in MPa were: GI = 3.65; GII = 4.39; GIII = 6.45; GIV = 7.11; GV = 4.67; and GVI = 4.21. The type of light-curing unit did not interfere with the results of the mechanical tests in vivo or in vitro. The tests performed with a portable digital device obtained average values that were significantly lower than those performed with the Universal Testing Machine.
    World journal of orthodontics 02/2009; 10(1):21-8.
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    ABSTRACT: Soft drink consumption has steadily increased in recent decades in both western and developing countries. The trend is most apparent among children and adolescents. This rise in soft drink consumption has raised concerns among health care professionals, including dental practitioners. Accordingly, the effects of soft drinks on dental health have been investigated. Several studies have shown that dental problems, such as caries, enamel erosion, and corrosion of dental materials, may be associated with soft drink consumption. Because orthodontic appliances restrict toothbrush access, patients undergoing orthodontic treatment need special oral care and advice. This article reviews the risks and implications of soft drink consumption for orthodontic patients.
    World journal of orthodontics 02/2009; 10(1):33-40.
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    ABSTRACT: In contemporary dental care, an increasing number of adult patients with periodontal disease are seeking orthodontic treatment. Achieving optimal results in such adult patients is difficult because decreased posterior tooth anchorage is risky. This case report demonstrates the use of miniscrew implant anchorage (MIA) in a Chinese male 21 years 5 months of age with maxillary and mandibular anterior dental spacing, bimaxillary protrusion, and severe bone loss caused by periodontal disease. Prior to orthodontic treatment, the patient underwent treatment to control his periodontitis. The patient was treated with 0.022-in straight-wire orthodontic appliances. After 17 months of active orthodontic treatment, the patient had healthier periodontal tissue with increased bone support, as well as improved facial esthetics and a functional occlusion. The results demonstrate that MIA is useful in enhancing anchorage in patients with bone loss associated with severe periodontal disease.
    World journal of orthodontics 02/2009; 10(1):49-56.
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    ABSTRACT: This article describes the clinical application of a new superelastic Ni-Ti-stainless steel retraction spring used especially for canine retraction following the segmented archwire technique. The use of the new spring and its 2 configurations are demonstrated in a typodont experiment. Clinical experience with the new spring is presented in 2 patients; it produced canine retraction in these patients who required first premolar extraction. The use of the spring in both cases led to bodily tooth retraction without reactivation or any undesirable side effects.
    World journal of orthodontics 02/2008; 9(1):48-51.
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    ABSTRACT: The aim of this study was to investigate head posture and hyoid bone position using lateral cephalograms of adult Class III Turkish females and males. Lateral cephalograms of 69 Turkish adult Class III subjects (39 females and 30 males with a mean age of 25.7 +/- 3.6 years) taken at the natural head posture were evaluated. The individuals had parents of Turkish origin; no visual or hearing disorders; no breathing or swallowing disorders; complete dentitions (except for third molars); no previous orthodontic treatment or orthognathic surgery; and no burns, injuries, or scars on the head or neck. The linear measurement reflecting the distance between the hyoid bone and cervical vertebrae tangent, nasion-sella line, and nasion lines were significantly lower in the female group than in the male group. Also, distances between the hyoid bone and CV4ia, CV4ip, CV3ia, CV2ia, Bolton, Articulare, Hm-S, and anterior nasal spine were significantly lower in the female group than in the male group. It was found that there were no gender variations in head position between Turkish Class III adults. The linear measurements regarding the position of hyoid bone showed higher and more posterior in Turkish adult Class III female subjects, while natural head position was not affected by sex.
    World journal of orthodontics 02/2008; 9(4):391-8.
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    ABSTRACT: This article reports on a patient with severe maxillary and mandibular crowding treated by both expansion and extraction treatment. Two surgical procedures, surgically assisted palatal expansion and a mandibular midline osteotomy, were performed in sequence for skeletal expansion. A hybrid appliance, consisting of a Hyrax screw and 2 miniplates, was used in the mandible. Since expansion was not enough for relief of the crowding, 3 premolars were later extracted. The patient's final occlusion was satisfactory, but genioplasty may be desired in the future.
    World journal of orthodontics 02/2008; 9(1):26-34.
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    ABSTRACT: This article reviews the literature on tooth transposition. Several cases with various types and combinations of tooth transposition are presented and treatment management and options are discussed. Indications, advantages, and disadvantages of correcting versus maintaining tooth order are shown.
    World journal of orthodontics 02/2008; 9(4):303-18.
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    ABSTRACT: Much has been written in support of systematic reviews and the randomized clinical trials and meta-analyses upon which they are based. Clearly, the medical profession (as opposed to the dental profession) has been the leader in publishing the benefits of systematic reviews over the traditional, qualitative narrative reviews. At the same time, the medical profession also appears to be ahead of the dental profession in recognizing the limitations of such reviews. That said, there are a number of inherent problems with systematic reviews, as well as the randomized clinical trials and meta-analyses that back them up. To better facilitate evidence-based decision making, this article discusses the shortcomings of systematic reviews so that practitioners are fully aware of their drawbacks, as well as their benefits.
    World journal of orthodontics 02/2008; 9(2):167-76.
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    ABSTRACT: Adolescents with congenitally missing lateral incisors require an interim space maintainer to restore function and esthetics before craniofacial growth is complete and an endosseous implant can be placed. This article presents 2 patients, each with a missing lateral incisor, who underwent orthodontic therapy. A chairside, prefabricated fiber-reinforced composite bridge was used as a fixed space maintainer after the appliances were removed.
    World journal of orthodontics 02/2008; 9(4):349-54.
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    ABSTRACT: To examine whether orthodontic treatment induces an increase in salivary nickel and chromium concentration. Ten new patients (7 females and 3 males) beginning fixed orthodontic treatment were included in the study. The mean age of the sample was 17.5 years (range 14 to 24 years). Three samples of stimulated saliva were collected from each orthodontic patient, 1 at each of the following times: before insertion of the fixed appliance (which served as a baseline/reference level for salivary nickel and chromium content), 1 week after insertion of the appliance, and 3 weeks after insertion of the appliance. These samples were analyzed for nickel and chromium content using the atomic absorption spectrometer and their values recorded in ng/mL. The Friedman test was used to test the statistical significance of differences in concentrations of each metal before and after insertion of orthodontic appliances. Post-hoc comparisons were performed using the Wilcoxon signed rank test and Mann-Whitney U test. This study showed that there was a statistically significant difference in salivary nickel and chromium concentrations before and 1 week and 3 weeks after insertion of fixed orthodontic appliances. The highest concentrations of nickel and chromium were found after 1 week. The salivary nickel and chromium concentrations tapered off 3 weeks after insertion but were significantly higher than baseline levels. The salivary nickel and chromium concentrations significantly increased after insertion of fixed orthodontic appliances as compared to baseline levels, with the maximum concentration seen in the first week after placement of fixed orthodontic appliances.
    World journal of orthodontics 02/2008; 9(3):196-202.