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Gao Y, Sun X, Yan X, Tang Z, Lai W, Long H. Orthodontic Practitioners' Knowledge and Education Demand on Clear Aligner Therapy. Int Dent J 2024; 74:81-87. [PMID: 37500450 PMCID: PMC10829360 DOI: 10.1016/j.identj.2023.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 06/14/2023] [Accepted: 07/03/2023] [Indexed: 07/29/2023] Open
Abstract
OBJECTIVES Clear aligner therapy (CAT) has been gaining popularity amongst the orthodontic community. No systematic course on CAT has been reported to date. The objectives of this study were to determine practitioners' knowledge and to offer insights for future tailored courses on CAT. METHODS An online questionnaire was distributed. The questionnaire comprised personal background information, predictability of tooth movement through CAT, and CAT knowledge that practitioners demanded to learn. Four senior expert orthodontists' answers to the predictability of tooth movement through CAT were averaged to be a standard reference. Descriptive statistics, 1-way analysis of variance (ANOVA), principal component analysis, Student t test, and multivariate logistics regression analysis were performed with significance set at P < .05. RESULTS In total, 190 practitioners participated in this study. As compared to the standard reference, participants overestimated the predictability of difficult-to-be-achived tooth movements (eg, molar mesialisation; P < .0001). Strategy of managing troubleshooting cases and extraction cases ranked the highest CAT knowledge that participants requested to learn. Practice type, number of completed CAT cases, number of undergoing CAT cases, years of practice, education background, and time of using CAT were the influencing factors of the questions regarding the predictability of tooth movement through CAT and CAT knowledge that were demanded to be learned. CONCLUSIONS The predictability of difficult-to-be-achieved tooth movement through CAT is often overestimated by practitioners with limited clinical experience. Tailored education on CAT, especially managing troubleshooting cases and extraction cases, should be designed for all practitioners.
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Affiliation(s)
- Yanzi Gao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xuejun Sun
- Department of Biostatistics, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, North Carolina, USA
| | - Xinyu Yan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ziwei Tang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wenli Lai
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Hu Long
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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Caruso S, De Felice ME, Valenti C, Pagano S, Caruso S, Gatto R, Lombardo G. An evaluation of the Invisalign® Aligner Technique and consideration of the force system: a systematic review. Syst Rev 2024; 13:43. [PMID: 38281057 PMCID: PMC10821231 DOI: 10.1186/s13643-023-02437-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 12/13/2023] [Indexed: 01/29/2024] Open
Abstract
OBJECTIVE Since its introduction 25 years ago, the Invisalign® system has undergone multiple digital and biomechanical evolutions and its effectiveness is often compared to traditional systems without considering the many differences which characterize them. The main aim of this systematic review is to look at the literature dealing with studies on teeth movements using the Invisalign® system and the management of these movements through digital planning and artificial intelligence. MATERIALS AND METHODS The following electronic databases were searched: MEDLINE, Embase, the Cochrane Oral Health Group's Trials Register, and CENTRAL. Unpublished studies were searched on ClinicalTrials.gov, the National Research Register, and Pro-Quest Dissertation Abstracts and Thesis database. RESULTS Twenty-four studies (15 retrospective, 5 prospective, 2 pilot, and 2 case-control) were included. The results of the analysis carried out on the available literature show that the Invisalign® system is recognized to be a valid alternative to conventional orthodontic treatment in no-extraction cases. The results are influenced by the methods for assessing the effectiveness of this technique and by the comparison bias of the traditional system with the innovative digital system. CONCLUSIONS Since the introduction of SmartForce and SmartTrack material, the efficacy of the treatment has improved. There is still a shortage of high-quality evidence concerning the treatment modality. In order to make the treatment with the aligners more efficient, a correct management of the ClinCheck® software and a proper use of the biomechanics are necessary. The aligned force-driven system should be taken into account when developing the digital planning.
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Affiliation(s)
- Silvia Caruso
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100, L'Aquila, Italy
| | - Maria Elena De Felice
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100, L'Aquila, Italy.
| | - Chiara Valenti
- CISAS "Giuseppe Colombo", University of Padua, Via Venezia, 15, 35131, Padua, Italy
- Department of Medicine and Surgery, Faculty of Dentistry, University of Perugia, S. Andrea delle Fratte, 06156, Perugia, Italy
| | - Stefano Pagano
- Department of Medicine and Surgery, Faculty of Dentistry, University of Perugia, S. Andrea delle Fratte, 06156, Perugia, Italy
| | - Sara Caruso
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100, L'Aquila, Italy
| | - Roberto Gatto
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100, L'Aquila, Italy
| | - Guido Lombardo
- Department of Medicine and Surgery, Faculty of Dentistry, University of Perugia, S. Andrea delle Fratte, 06156, Perugia, Italy
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Ma S, Wang Y. Clinical outcomes of arch expansion with Invisalign: a systematic review. BMC Oral Health 2023; 23:587. [PMID: 37620781 PMCID: PMC10464440 DOI: 10.1186/s12903-023-03302-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 08/10/2023] [Indexed: 08/26/2023] Open
Abstract
OBJECTIVE This study aims to assess the scientific evidence regarding the clinical outcomes of Invisalign therapy in controlling orthodontic tooth movement. MATERIALS AND METHODS An electronic search was conducted on PubMed, Cochrane Library, Web of Science, Embase, and Scopus from November 2015 to November 2022 to identify relevant articles. Methodological shortcomings were highlighted, and an evaluation of the quality of the included studies was completed using the Risk of Bias in Non-randomized Studies of Interventions (ROBINS-I) tool. RESULTS Fifteen non-randomized controlled trials were included in the analysis. Most non-randomized controlled trials (n=11; 73%) were rated with a moderate risk of bias according to the ROBINS-I tool. There were statistically significant differences between the pretreatment and posttreatment arches. The average expansion was significantly different from that predicted for each type of tooth in both the maxilla and mandible. Furthermore, the efficiency decreased from the anterior area to the posterior area in the upper arch. CONCLUSION Despite the fact that arch expansion with Invisalign® is not entirely predictable, clear aligner treatment is a viable option for addressing dentition crowding. The efficacy of expansion is greatest in the premolar area. More research focusing on treatment outcomes with different materials of aligners should be conducted in the future. Overcorrection should be considered when planning arch expansion with Invisalign. In the maxilla, the expansion rate decreases from the anterior to the posterior, and presetting sufficient buccal root torque of posterior teeth may result in improved efficiency of expansion.
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Affiliation(s)
- Songyang Ma
- Department of Orthodontics, Stomatological Hospital of Chongqing Medical University, Chongqing, People's Republic of China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, People's Republic of China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, People's Republic of China
| | - Yunji Wang
- Department of Orthodontics, Stomatological Hospital of Chongqing Medical University, Chongqing, People's Republic of China.
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, People's Republic of China.
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, People's Republic of China.
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Burashed H, Sebai RE. Quantifying the efficacy of overbite reduction in patients treated with clear aligners using optimized versus conventional attachments. J World Fed Orthod 2023; 12:105-111. [PMID: 37142480 DOI: 10.1016/j.ejwf.2023.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/23/2023] [Accepted: 03/23/2023] [Indexed: 05/06/2023]
Abstract
BACKGROUND Deep overbite has been shown to be difficult to correct with clear aligners. Optimized deep bite attachments are reported to facilitate deep bite correction with aligners. The aim of this retrospective study was to quantify the efficacy of deep bite correction with aligners when using optimized versus conventional attachments. METHODS This was a retrospective cohort study. The pretreatment and post-treatment intraoral scans of patients with deep overbite treated with Invisalign clear aligners were accessed. Patients were divided into two groups: group A, patients treated with conventional attachments, and group B, patients treated with optimized attachments. Pre and post-treatment overbite and the planned overbite reduction were measured and compared between groups. Descriptive statistics were computed, and statistical significance was set at P < 0.05. RESULTS Seventy-eight patients were included. There was no statistically significant difference in overbite reduction between patients who had conventional versus optimized attachments. The amount of overbite reduction observed post-treatment was found to be no more than 33-40% of the planned amount of overbite reduction across all patients and groups. CONCLUSIONS Deep overbite correction with aligners remains difficult regardless of the type of attachment used. Optimized attachments are no more effective than using conventional attachments in reducing deep overbite. The amount of overbite reduction expected with clear aligners is significantly lower than the planned overbite reduction. PRACTICAL IMPLICATIONS When correcting deep bite with clear aligners, the attachment type does not improve the success rate. Clinicians should plan to overcorrect deep bite reduction to expect only 33% to 40% of their planned final overbite to be actually expressed.
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Affiliation(s)
- Hamad Burashed
- Attending, Dental Department, Orthodontics Section, St. Barnabas Hospital, Bronx, New York; Associate, SmileCrafters Dental, Ancaster, Ontario, Canada; Dental Director, Danvers Dental Wellness, Danvers, Massachusetts.
| | - Rami El Sebai
- President, SmileCrafters Dental, Ancaster, Ontario, Canada
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Marcelino V, Baptista S, Marcelino S, Paço M, Rocha D, Gonçalves MDP, Azevedo R, Guimarães AS, Fernandes GVO, Pinho T. Occlusal Changes with Clear Aligners and the Case Complexity Influence: A Longitudinal Cohort Clinical Study. J Clin Med 2023; 12:jcm12103435. [PMID: 37240538 DOI: 10.3390/jcm12103435] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/28/2023] [Accepted: 05/07/2023] [Indexed: 05/28/2023] Open
Abstract
BACKGROUND Clear aligners (CA) are used 22 h daily, creating a bite-block effect. This work aims to (i) analyze occlusal changes before the beginning of treatment, after the first set of CA and after the use of additional aligners; (ii) compare planned occlusal contacts with the ones obtained after the first set of CA; (iii) analyze the occlusal changes occurred after reaching the orthodontic goals after 3 months of using CA only at night; (iv) evaluate and characterize which tooth movements did not allow the treatment to be completed at the end of the first set of aligners, and finally (v) verify the possible relation between the changes in occlusal contact and areas and parameters such as case complexity and facial biotype. MATERIALS AND METHODS A quantitative, comparative, and observational longitudinal cohort study design was implemented to evaluate the clinical data and the complexity levels of cases receiving CA. A non-probabilistic and convenience sample of 82 individuals was recruited. The orthodontic malocclusion traits were classified as simple, moderate, or complex corrections based on the basis of the Align® recommendations with the Invisalign® evaluation tool. According to the Invisalign® criteria, patients need only one complex problem for their case to be classified as complex. Meshlab® v. 2022.02, ClinCheck® version Pro 6.0, My-Itero® version 2.7.9.601 5d plus, and IBM® SPSS Statistics software (Statistical Program for Social Sciences), version 27.0 for Windows were the software® used. RESULTS A statistically significant decrease in area and occlusal contacts number were observed from before the start of orthodontic treatment (T0) to the end of treatment (T1). The changes in the occlusal area (from T0 to T1) were statistically different between hyperdivergent (28.24 [15.51-40.91]) and hypodivergent (16.23 [8.11-24.97]) biotypes (p = 0.031). A significant difference between the hyperdivergent (4.0 [2.0-5.0]) and normodivergent (5.5 [4.0-8.0]) group was found in T1 for the anterior contacts (p = 0.044). Anterior contacts obtained were significantly higher than the planned (p = 0.037) Between T1 and T2 statistically significant increases of occlusal areas, posterior and total contacts were observed. CONCLUSIONS Occlusal contact and area were decreased, either at the end of the first set or after the use of additional aligners. Anterior occlusal contacts obtained were higher than planned as opposed to posterior occlusal contacts obtained. The hardest tooth movements to achieve to complete the treatment were distalization, rotation, and posterior extrusion. After completing orthodontic treatment (T1) to 3 months after (T2) using additional aligners only at night, posterior occlusal contacts were significantly increased, which could be due to the natural settling of the teeth in this period.
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Affiliation(s)
- Vanessa Marcelino
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), 4585-116 Gandra, Portugal
| | - Sofia Baptista
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), 4585-116 Gandra, Portugal
| | - Sandra Marcelino
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Maria Paço
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), 4585-116 Gandra, Portugal
| | - Duarte Rocha
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), 4585-116 Gandra, Portugal
| | - Maria Dos Prazeres Gonçalves
- TOXRUN-Toxicology Research Unit, University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), 4585-116 Gandra, Portugal
| | - Rui Azevedo
- TOXRUN-Toxicology Research Unit, University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), 4585-116 Gandra, Portugal
| | - António Sérgio Guimarães
- Laboratory of Neuroimmune Interface of Pain Research, Faculdade São Leopoldo Mandic, Campinas 13045-755, Brazil
| | | | - Teresa Pinho
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), 4585-116 Gandra, Portugal
- Institute for Molecular and Cell Biology, i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
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da Silva VM, Ayub PV, Massaro C, Janson G, Garib D. Comparison between clear aligners and 2 × 4 mechanics in the mixed dentition: a randomized clinical trial. Angle Orthod 2023; 93:3-10. [PMID: 36066265 PMCID: PMC9797137 DOI: 10.2319/032322-237.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 06/01/2022] [Indexed: 01/09/2023] Open
Abstract
OBJECTIVES To compare the efficacy and efficiency between clear aligners and 2 × 4 fixed appliances for correcting maxillary incisor position irregularities in the mixed dentition. MATERIALS AND METHODS The sample comprised 32 patients from 7 to 11 years of age randomly allocated into two parallel treatment groups: the clear aligners group, 14 patients (6 girls, 8 boys) with a mean initial age of 9.33 years (standard deviation [SD] = 1.01) treated with clear aligners; and the fixed appliances group, 13 patients (9 girls, 4 boys) with a mean initial age of 9.65 years (SD = 0.80) treated with partial (2 × 4) fixed appliances. Digital models were acquired before treatment and after appliance removal. Primary outcomes were incisor irregularity index and treatment time. Secondary outcomes were arch width, perimeter, length, size and shape, incisor leveling, incisor mesiodistal angulation, plaque index, and white spot lesion formation (International Caries Detection and Assessment System index). Intergroup comparisons were evaluated using t-tests or Mann-Whitney U-tests with Holm-Bonferroni correction (P < .05). RESULTS Treatment time was approximately 8 months in both groups. No intergroup differences were observed for changes in any of the variables. Similar posttreatment arch shapes were observed in both groups. CONCLUSIONS Clear aligners and 2 × 4 mechanics displayed similar efficacy and efficiency for maxillary incisor position corrections in the mixed dentition. The choice of appliance should be guided by clinician and family preference.
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Fiori A, Minervini G, Nucci L, d'Apuzzo F, Perillo L, Grassia V. Predictability of crowding resolution in clear aligner treatment. Prog Orthod 2022; 23:43. [PMID: 36437397 PMCID: PMC9702322 DOI: 10.1186/s40510-022-00438-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 09/02/2022] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND To assess the predictability of crowding resolution and the efficacy of different strategies to gain space during clear aligners treatment. METHODS A total of 10 clinicians were randomly recruited using the Doctor Locator by Align Technology (California). For each clinician, four consecutive patients treated with aligners and manual stripping were selected for a total of 40 subjects. Thus, 80 arches were collected and uploaded on the Orthoanalyzer software for arch measurements. The data were gained on the starting arch form (T0), on the virtual arch developed with digital planning (vT1), and on the arch form achieved at the end of the aligner sequences (T1). The following parameters were scored: Little's Irregularity Index, transversal arch diameters, (intercuspid, interpremolar, and intermolar width), incisor position/arch length, and enamel interproximal reduction (IPR). RESULTS For all the measurements, statistically significant differences were found at different stages. The predictability of crowding resolution was very high, ranging from 87% in the upper arch and 81% in the lower one. Among the different strategies to gain space, variations in sagittal incisor position were predictable, with a value of 70% both in the upper and lower arch. Conversely, changes in arch diameters were less reliable varying between 49 and 67% in the lower arch and 59-83% in the upper one. Moreover, IPR was the least accurate procedure, wavering at 49% in the upper arch and 42% in the lower arch. CONCLUSIONS The predictability of crowding resolution during treatment with aligners was high. However, the virtual arch forms obtained at the end of digital planning (vT1) did not correspond with the arch forms at the end of the aligner sequences (T1). The IPR was the least predictable strategy to gain space, being, perhaps, an operator-dependent procedure.
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Affiliation(s)
- Adriana Fiori
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi De Crecchio 6, 80138, Naples, Italy
| | - Giuseppe Minervini
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi De Crecchio 6, 80138, Naples, Italy
| | - Ludovica Nucci
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi De Crecchio 6, 80138, Naples, Italy.
| | - Fabrizia d'Apuzzo
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi De Crecchio 6, 80138, Naples, Italy
| | - Letizia Perillo
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi De Crecchio 6, 80138, Naples, Italy
| | - Vincenzo Grassia
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi De Crecchio 6, 80138, Naples, Italy
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Goh S, Dreyer C, Weir T. The predictability of the mandibular curve of Spee leveling with the Invisalign appliance. Am J Orthod Dentofacial Orthop 2022; 162:193-200. [PMID: 35753894 DOI: 10.1016/j.ajodo.2021.04.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 04/01/2021] [Accepted: 04/01/2021] [Indexed: 11/01/2022]
Abstract
INTRODUCTION The purpose of this study is to provide an initial investigation into the predictability and characteristics of the mandibular curve of Spee (COS) leveling using the Invisalign appliance (Align Technology, Santa Clara, Calif) and any regions of ineffectiveness in the dental arch. METHODS This study used a retrospective sample of patients treated by a single experienced Invisalign provider in private practice. All adult patients with Class I or II Angle malocclusions treated using a minimum of 14 Invisalign aligners without intermaxillary elastics, bite ramps, or auxiliaries and a nonextraction mandibular arch from 2013 to 2019 in the practice were selected. Dental models at the initial scan, the ClinCheck prediction, and the actual outcome were analyzed with Geomagic Control X software (version 2017.0.3; 3D systems, Rock Hill, SC). The COS and extrusion of posterior teeth relative to the occlusal plane were measured and compared. RESULTS Forty-two subjects met the selection criteria. ClinCheck predicted 0.55 mm (P < 0.0001) more COS leveling than the actual outcome. The mean COS leveling accuracy using Invisalign was 35%, and ClinCheck overestimated the leveling in 86% of the patients. The first molars had the lowest accuracy and extrusion relative to the occlusal plane. CONCLUSIONS To achieve desired clinical treatment goals, there should be a prescribed overcorrection of the mandibular COS leveling within the ClinCheck treatment plan, and the extrusion of mandibular first molars should be a region of focus. The clinician should consider using auxiliary appliances to improve mandibular COS leveling.
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Affiliation(s)
- Shaun Goh
- Department of Orthodontics, School of Dentistry, University of Adelaide, Adelaide, South Australia, Australia.
| | - Craig Dreyer
- Department of Orthodontics, School of Dentistry, University of Adelaide, Adelaide, South Australia, Australia
| | - Tony Weir
- Department of Orthodontics, School of Dentistry, University of Adelaide, Adelaide, South Australia, Australia
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Lin E, Julien K, Kesterke M, Buschang PH. Differences in finished case quality between Invisalign and traditional fixed appliances. Angle Orthod 2022; 92:173-179. [PMID: 35168256 PMCID: PMC8887409 DOI: 10.2319/032921-246.1] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 07/01/2021] [Indexed: 08/24/2023] Open
Abstract
OBJECTIVES To compare the treatment and posttreatment effects of Invisalign aligners that incorporated SmartForce features and attachments to traditional fixed appliances. MATERIALS AND METHODS This randomized controlled trial included 66 patients, 32 aligners, and 34 fixed-appliance patients. The median ages of the aligner and braces patients were 26.7 (interquartile range [IQR]: 9.8) and 25.9 (IQR: 16.6) years, respectively. Pretreatment occlusion was assessed using the ABO Discrepancy Index. Posttreatment (T1) and 6-month retention (T2) occlusions were quantified using the ABO Objective Grading System (OGS) scores. RESULTS The braces group finished treatment significantly (P < .001) earlier (0.4 years) than the aligner group. The median DI scores for the aligner and braces groups were 4.5 and 7.0, respectively, which was a statistically significant (P = .015), but clinically insignificant, difference. There were no statistically significant between-group differences for the total OGS scores or any of the individual component scores at debond (T1) or after 6 months of retention (T2). During the posttreatment period, alignment and overjet worsened significantly in the aligner group, while buccolingual inclinations and occlusal relations improved. Over the same period, alignment worsened in the braces group and buccolingual inclinations improved. There was no statistically significant between-group difference in posttreatment changes of the total OGS scores. CONCLUSIONS While patients with simple malocclusions require 4.8 months longer treatment times with aligners than traditional braces, the treatment and 6-month posttreatment occlusal outcomes are similar.
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Shashidhar K, Kanwal B, Kuttappa MN, Krishna Nayak US, Shetty A, Mathew K. Clear Aligners: Where are we today? A narrative review. J Int Oral Health 2022. [DOI: 10.4103/jioh.jioh_334_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Saif BS, Pan F, Mou Q, Han M, Bu W, Zhao J, Guan L, Wang F, Zou R, Zhou H, Guo YC. Efficiency evaluation of maxillary molar distalization using Invisalign based on palatal rugae registration. Am J Orthod Dentofacial Orthop 2021; 161:e372-e379. [DOI: 10.1016/j.ajodo.2021.11.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/01/2021] [Accepted: 11/01/2021] [Indexed: 11/01/2022]
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Gvozdeva LM, Danilova MA, Alexandrova LI, Dmitrienko IV. [The results of orthodontic treatment using aligners from the perspective of quality of life of patients with dentoalveolar anomalies]. STOMATOLOGII︠A︡ 2021; 100:73-75. [PMID: 33874665 DOI: 10.17116/stomat202110002173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
THE AIM OF THE STUDY WAS TO ANALYZE The impact of morphological and functional dental components on the quality of life of adult patients undergoing orthodontic treatment using clear aligners. MATERIALS AND METHODS Morphological and functional results of orthodontic treatment with aligners as well as the dynamics of oral health related quality of life was assessed in 55 patients aged from 20 to 25 years. RESULTS The study of the efficacy of orthodontic treatment with aligners showed significant improvement of morphological and functional features of dental arches as well as oral health related quality of life in the course of treatment. CONCLUSION Orthodontic treatment with aligners is efficient for achieving morphological and functional improvement and enhances social adaptation of patients by increasing oral health related quality of life.
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Affiliation(s)
- L M Gvozdeva
- Medical Stomatological Institute, Moscow, Russia
| | - M A Danilova
- Wagner Perm State Medical University, Perm, Russia
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Laganà G, Malara A, Lione R, Danesi C, Meuli S, Cozza P. Enamel interproximal reduction during treatment with clear aligners: digital planning versus OrthoCAD analysis. BMC Oral Health 2021; 21:199. [PMID: 33874922 PMCID: PMC8056583 DOI: 10.1186/s12903-021-01487-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 02/25/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The aim of the study was to compare the amount of interproximal enamel reduction (IPR) provided on ClinCheck software with the amount of IPR carried out by the orthodontist during treatment with clear aligners. METHODS 30 subjects (14 males, 16 females; mean age of 24.53 ± 13.41 years) randomly recruited from the Invisalign account of the Department of Orthodontics at the University of Rome "Tor Vergata" from November 2018 to October 2019, were collected according to the following inclusion criteria: mild to moderate dento-alveolar discrepancy (1.5-6.5 mm); Class I canine and molar relationship; full permanent dentition (excluding third molars); both arches treated only using Comprehensive Package by Invisalign system; treatment plan including IPR. Pre- (T0) and post-treatment (T1) digital models (.stl files), created from an iTero scan, were collected from all selected patients. The OrthoCAD digital software was used to measure tooth mesiodistal width in upper and lower arches before (T0) and at the end of treatment (T1) before any refinement. The widest mesio-distal diameter was measured for each tooth excluding molars by "Diagnostic" OrthoCAD tool. The total amount of IPR performed during treatment was obtained comparing the sum of mesio-distal widths of all measured teeth at T0 and T1. Significant T1-T0 differences were tested with dependent sample t-test (P < 0.05). RESULTS In the upper arch, IPR was digitally planned on average for 0.62 mm while in the lower arch was on average for 1.92 mm. As for the amount of enamel actually removed after IPR performing, it was on average 0.62 mm in the maxillary arch. In the mandibular arch, the mean of IPR carried out was 1.93 mm. The difference between planned IPR and performed IPR is described: this difference was on average 0.00 mm in the upper arch and 0.01 in the lower arch. CONCLUSIONS The amount of enamel removed in vivo corresponded with the amount of IPR planned by the Orthodontist using ClinCheck software.
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Affiliation(s)
- Giuseppina Laganà
- Department of Systems Medicine, University of Rome 'Tor Vergata', Viale Oxford 81, 00133, Rome, Italy
| | - Arianna Malara
- Department of Systems Medicine, University of Rome 'Tor Vergata', Viale Oxford 81, 00133, Rome, Italy.
| | - Roberta Lione
- Department of Systems Medicine, University of Rome 'Tor Vergata', Viale Oxford 81, 00133, Rome, Italy
| | - Carlotta Danesi
- Department of Systems Medicine, University of Rome 'Tor Vergata', Viale Oxford 81, 00133, Rome, Italy
| | - Simonetta Meuli
- Department of Systems Medicine, University of Rome 'Tor Vergata', Viale Oxford 81, 00133, Rome, Italy
| | - Paola Cozza
- Department of Systems Medicine, University of Rome 'Tor Vergata', Viale Oxford 81, 00133, Rome, Italy
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Lucchese A, Nocini R, Tacchino U, Ghislanzoni LH, Bertossi D, Ricciardi G, Bassani L, Korolija S, Lo Giudice A, Croce S, Manuelli M. Invisalign appliance: aesthetic and efficiency. ACTA ACUST UNITED AC 2021; 69:329-334. [PMID: 33393274 DOI: 10.23736/s0026-4970.20.04128-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The patients' request for treatment with clear aligners is constantly increasing. The aligners permit to the clinicians a valid way to solve a lot of orthodontic cases but the patients' compliance and the clinicians' capabilities and knowledge of the technique is fundamental for the outcome. METHODS Seventy-two digital models of 18 consecutive patients treated with Invisalign and Smart Track aligners for 14 weeks were analyzed. The operator positioned 24 points on each model and were obtained the values of arch depth and perimeter of arch before and after the treatment. The variations of measurement were calculated with t student test. RESULTS A decrease of arch depth and perimeter was found from t0 to t1 and the most relevant difference was observed in the upper arch depth with a decrease of 1.3 mm and in the upper arch perimeter with a difference of 1.1 mm. CONCLUSIONS There was always a decrease of the values of arch depth and arch perimeter at the end of the treatment, especially in the upper arch. These changes must be considered by the clinicians to perform a better treatment to obtain the most predictable results and a patient's higher satisfaction.
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Affiliation(s)
- Alessandra Lucchese
- Department of Dentistry, Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy - .,Research Center for Oral Pathology and Implantology, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy -
| | - Riccardo Nocini
- Unit of ENT, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
| | - Umberto Tacchino
- Department of Dentistry, Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy.,Research Center for Oral Pathology and Implantology, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy
| | - Luis H Ghislanzoni
- Department of Dentistry, Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy.,Research Center for Oral Pathology and Implantology, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy
| | - Dario Bertossi
- Unit of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
| | - Giulia Ricciardi
- Unit of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
| | - Luca Bassani
- Department of Dentistry, Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy.,Research Center for Oral Pathology and Implantology, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy
| | - Sofija Korolija
- Department of Dentistry, Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy.,Research Center for Oral Pathology and Implantology, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy
| | - Antonino Lo Giudice
- Section of Orthodontics, Department of General Surgery and Medical Surgical Specialities, School of Dentistry, University of Catania, Catania, Italy
| | - Silvia Croce
- Department of Dentistry, Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy.,Research Center for Oral Pathology and Implantology, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy
| | - Maurizio Manuelli
- Department of Dentistry, Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy.,Research Center for Oral Pathology and Implantology, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy.,Private Practitioner, Milan, Pavia, Bologna, Italy
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15
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De Felice ME, Nucci L, Fiori A, Flores-Mir C, Perillo L, Grassia V. Accuracy of interproximal enamel reduction during clear aligner treatment. Prog Orthod 2020; 21:28. [PMID: 32719906 PMCID: PMC7385051 DOI: 10.1186/s40510-020-00329-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 07/15/2020] [Indexed: 11/16/2022] Open
Abstract
Aim The aim of the present study was to compare the accuracy of the actual space obtained through interproximal enamel reduction (IPR) compared to the amount of IPR planned through the digital setup during clear aligner treatment (CAT). Materials and methods A total of 10 clinicians were randomly recruited using the Doctor Locator by Align Technology (California). For each clinician, four consecutive patients treated with CAT and manual stripping were selected for a total of 40 subjects and 80 dental arches. For each patient, the amount of planned IPR and the amount of actual IPR performed were recorded. Each arch was considered individually. For each arch, the mesio-distal tooth measurements were obtained from second to second premolars. Results No systematic measurement errors were identified. In 25 cases, stripping was planned and performed in both arches; in 4 cases only in the upper arch and in the remaining 7 cases only in the lower arch. The difference between planned IPR and performed IPR was on average 0.55 mm (SD, 0.67; P = 0.022) in the upper arch and 0.82 mm (SD, 0.84; P = 0.026) in the lower arch. The accuracy of IPR in the upper arch was estimated to be 44.95% for the upper arch and 37.02% for the lower arch. Conclusion Overall, this study showed that the amount of enamel removed in vivo did not correspond with the amount of IPR planned. In most cases, the performed IPR amount was lower than planned. When considering the actual amount in millimeter, these differences may not be considered clinically relevant.
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Affiliation(s)
- Maria Elena De Felice
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi de Crecchio 6, 80138, Naples, Italy
| | - Ludovica Nucci
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi de Crecchio 6, 80138, Naples, Italy
| | - Adriana Fiori
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi de Crecchio 6, 80138, Naples, Italy
| | - Carlos Flores-Mir
- Department of Dentistry, Division of Orthodontics, University of Alberta, 5-528 Edmonton Clinic Health Academy, Alberta, Canada
| | - Letizia Perillo
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi de Crecchio 6, 80138, Naples, Italy
| | - Vincenzo Grassia
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi de Crecchio 6, 80138, Naples, Italy.
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Abstract
INTRODUCTION Due to the search for more aesthetic and comfortable alternatives to perform orthodontic treatments and to the great technological development, orthodontic aligners have assumed great importance. More and more complex treatments have been carried out with these appliances without, however, having all aspects involved in their use being studied in depth. Its biomechanical planning requires different approaches than those used in fixed orthodontics, as the force systems involved in movements, responses and side effects are distinct, and the professional must be prepared when opting for the technique. OBJECTIVE The objective of this article is to perform an evaluation of the force systems created on the space closure with aligners, its characteristics, and problems, as well as make some suggestions to overcome the difficulties inherent to its use. CONCLUSION Space closure with aligners is possible, but depends on the correct selection of the patient, in addition to requiring the proper planning of the applied forces. The use of auxiliary resources and overcorrections to address the deficiencies of the aligner systems should always be considered. Digital planning should be used as a map of the force systems that will be applied, and not just as a marketing tool, keeping in mind that determining the objectives and the way to achieve them is the responsibility of the orthodontist, and that treatment plans must be individualized for each situation, following appropriate biomechanical precepts.
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Grassia V, Nucci L, Marra PM, Isola G, Itro A, Perillo L. Long-Term Outcomes of Nonextraction Treatment in a Patient with Severe Mandibular Crowding. Case Rep Dent 2020; 2020:1376472. [PMID: 32850153 PMCID: PMC7439177 DOI: 10.1155/2020/1376472] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 04/15/2020] [Accepted: 04/21/2020] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE To describe a clinical case with a severe mandibular crowding treated without extraction and showing a long-term outcome. METHODS A 14-year-old boy in permanent dentition showed a class I molar and cuspid relationship, a severe deep bite of 8 mm, a constricted V-shaped upper arch with moderate crowding, and a severe crowding of about 12 mm in the lower arch. The panoramic X-ray showed an impacted upper right canine. The treatment started with the placement of a transpalatal bar and 0.022 × 0.028 in standard edgewise appliances in the upper arch and a lip bumper bonded on the second lower molars. Initial leveling of the teeth was accomplished with light Australian round wires. Finishing was then performed with rectangular wires. The phase with fixed appliances lasted 2 years and 9 months, and the patient was motivated and cooperative throughout the treatment, although with poor oral hygiene. The patient was treated without extractions. RESULTS The space was gained with the first and second upper molar derotations using the transpalatal bar and the gingival lip bumper in the lower arch. The upper right canine was well positioned, and the maxillary arch form was improved. The severe lower crowding was completely corrected, and a good overbite was achieved. CONCLUSION A conservative, nonextraction treatment approach for this patient with class I malocclusion with severe mandibular crowding was effective, and the results have remained stable after a long-term follow-up (10 years).
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Affiliation(s)
- Vincenzo Grassia
- 1Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Ludovica Nucci
- 1Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Paola Martina Marra
- 1Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Gaetano Isola
- 2Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, Italy
| | - Angelo Itro
- 3Complex Operative Unit of Stomatological Surgery in Developmental Age, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Letizia Perillo
- 1Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Naples, Italy
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Galan-Lopez L, Barcia-Gonzalez J, Plasencia E. A systematic review of the accuracy and efficiency of dental movements with Invisalign®. Korean J Orthod 2019; 49:140-149. [PMID: 31149604 PMCID: PMC6533182 DOI: 10.4041/kjod.2019.49.3.140] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 09/20/2018] [Accepted: 10/05/2018] [Indexed: 11/16/2022] Open
Abstract
We are currently living in an era where the use of computer-aided design/computer-aided manufacturing has allowed individualized orthodontic treatments, but has also incorporated enhanced digitalized technology that does not permit improvisation. The purpose of this systematic review was to analyze publications that assessed the accuracy and efficiency of the Invisalign® system. A systematic review was performed using a search strategy to identify articles that referenced Invisalign®, which were published between August 2007 and August 2017, and listed in the following databases: MEDLINE, Embase, Cochrane Library, Web of Knowledge, Google Scholar, and LILACS. Additionally, a manual search of clinical trials was performed in scientific journals and other databases. To rate the methodological quality of the articles, a grading system described by the Swedish Council on Technology Assessment in Health Care was used, in combination with the Cochrane tool for risk of bias assessment. We selected 20 articles that met the inclusion criteria and excluded 5 due to excess biases. The level of evidence was high. Although it is possible to treat malocclusions with plastic systems, the results are not as accurate as those achieved by treatment with fixed appliances.
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Affiliation(s)
- Lidia Galan-Lopez
- Private Practice, Valencia, Spain.,Department of Orthodontics, School of Dentistry and Medicine, Catholic University of Valencia San Vicente Mártir, Valencia, Spain.,Doctoral School, Catholic University of Valencia San Vicente Mártir, Valencia, Spain
| | - Jorge Barcia-Gonzalez
- School of Dentistry and Medicine, Catholic University of Valencia San Vicente Mártir, Valencia, Spain
| | - Eliseo Plasencia
- Private Practice, Valencia, Spain.,Department of Orthodontics, School of Dentistry and Medicine, Catholic University of Valencia San Vicente Mártir, Valencia, Spain
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Buccolingual Inclination Control of Upper Central Incisors of Aligners: A Comparison with Conventional and Self-Ligating Brackets. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9341821. [PMID: 30627583 PMCID: PMC6304479 DOI: 10.1155/2018/9341821] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 09/18/2018] [Indexed: 12/31/2022]
Abstract
Objective The upper incisors torque expression is essential for the orthodontic treatment accuracy. Various orthodontic devices are claimed to have different inclination control capacity. The purpose of this retrospective study was to compare the radiographic buccolingual inclination of upper incisors in patients treated with three different orthodontic techniques. Material and Methods Conventional brackets (Victory, 3M), self-ligating appliances (Damon Q, Ormco), and aligners (Invisalign, Align Technology) were tested. Cephalometric data of 25 patients with similar skeletal and dental pretreatment parameters were collected for each technique. Position changes of upper central incisors were assessed with radiographic evaluation before and after therapy. Three different parameters were considered: 11∧SnaSnp, 11∧Ocl and I+ TVL. All variables were measured before (T0) and after (T1) treatment and their variation over treatment was assessed. Results When evaluating angular measurements, 11∧SnaSnp and 11∧Ocl angles showed the highest numeric variation with conventional brackets. Lowest values were reported with aligners. However, the differences among various techniques were not significant for both angles (P>0.05). Also I+ TVL linear value variation did not show significant differences among the different groups tested (P>0.05). Conclusion Conventional multibrackets appliance showed the highest incisal position variations over treatment, but the differences among various groups were not significantly different.
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Papadimitriou A, Mousoulea S, Gkantidis N, Kloukos D. Clinical effectiveness of Invisalign® orthodontic treatment: a systematic review. Prog Orthod 2018; 19:37. [PMID: 30264270 PMCID: PMC6160377 DOI: 10.1186/s40510-018-0235-z] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 07/27/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Aim was to systematically search the literature and assess the available evidence regarding the clinical effectiveness of the Invisalign® system. METHODS Electronic database searches of published and unpublished literature were performed. The reference lists of all eligible articles were examined for additional studies. Reporting of this review was based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. RESULTS Three RCTs, 8 prospective, and 11 retrospective studies were included. In general, the level of evidence was moderate and the risk of bias ranged from low to high, given the low risk of bias in included RCTs and the moderate (n = 13) or high (n = 6) risk of the other studies. The lack of standardized protocols and the high amount of clinical and methodological heterogeneity across the studies precluded a valid interpretation of the actual results through pooled estimates. However, there was substantial consistency among studies that the Invisalign® system is a viable alternative to conventional orthodontic therapy in the correction of mild to moderate malocclusions in non-growing patients that do not require extraction. Moreover, Invisalign® aligners can predictably level, tip, and derotate teeth (except for cuspids and premolars). On the other hand, limited efficacy was identified in arch expansion through bodily tooth movement, extraction space closure, corrections of occlusal contacts, and larger antero-posterior and vertical discrepancies. CONCLUSIONS Although this review included a considerable number of studies, no clear clinical recommendations can be made, based on solid scientific evidence, apart from non-extraction treatment of mild to moderate malocclusions in non-growing patients. Results should be interpreted with caution due to the high heterogeneity.
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Affiliation(s)
- Aikaterini Papadimitriou
- Department of Orthodontics and Dentofacial Orthopedics, 251 Hellenic Air Force General Hospital, P. Kanellopoulou 3, 11525, Athens, Greece
| | - Sophia Mousoulea
- Department of Orthodontics, University Hospital Ghent P8, University of Ghent, C. Heymanslaan 10, B-9000, Ghent, Belgium
| | - Nikolaos Gkantidis
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland
| | - Dimitrios Kloukos
- Department of Orthodontics and Dentofacial Orthopedics, 251 Hellenic Air Force General Hospital, P. Kanellopoulou 3, 11525, Athens, Greece. .,Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland.
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Halimi A, Benyahia H, Azeroual MF, Bahije L, Zaoui F. Relations entre la divergence faciale et les paramètres de la DDM. Int Orthod 2017; 15:698-707. [DOI: 10.1016/j.ortho.2017.09.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Relationships between facial divergence and DMD parameters. Int Orthod 2017; 15:698-707. [PMID: 29122570 DOI: 10.1016/j.ortho.2017.09.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
INTRODUCTION The aim of this study was to examine the relationship between facial divergence and the parameters of dentomaxillary discrepancy (DMD), in particular crowding, the curve of Spee and the position of the incisors in the sagittal dimension. MATERIAL AND METHODS A total of 90 young adult patients was selected from among the Moroccan orthodontic population attending the dentofacial orthopedic department and satisfying the following inclusion criteria: complete permanent dentition and a skeletal class I pattern with no previous orthodontic treatment, no crossbite, no periodontal disease, no mandibular asymmetry and no condylodiscal disunion. On cephalometric tracings, measurements were made of angles FMA, Go-Gn/SN, Occ/SN in the vertical direction, and of the values I/NA et i/NB in the sagittal direction. The curve of Spee and dental crowding were assessed using the one-way ANOVA test and the Bonferroni post-hoc test. Correlation analysis was performed between divergence and the different variables measured, using SPSS software with a 0.05 significance threshold. RESULTS Patients recruited for the study had a mean age of 19.8±0.5 and were distributed as follows: 28 normodivergent, 31 hypodivergent and 31 hyperdivergent, 42 females and 48 males. Comparison showed that hypodivergent subjects had less crowding than hypo- or normodivergent individuals (P<0.05). Hypodivergent subjects had a more pronounced curve of Spee than the other two groups. This difference was not significant (P>0.05). Hyperdivergent subjects presented more labioversion and vestibular positioning of the incisors compared with the hypodivergent (P<0.05) and normodivergent (P<0.05) groups. Correlation analysis showed that crowding and the incisor positions in millimeters and in degrees were positively correlated to a moderate extent with facial divergence (r=0.3, r=0.5, r=0.4; P<0.05), while the curve of Spee was not (P>0.05). No correlation was found between age or sex and the DMD parameters (P>0.05).
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