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Maboudi A, Fekrazad R, Moosazadeh M, Rouhaninezhad H, Mollaei M, Namdar P. Comparing Circumferential Supracrestal Fiberotomy with Surgical Scalpel Versus Photobiomodulation in Orthodontic Relapse Reduction: A Clinical Trial. Photobiomodul Photomed Laser Surg 2023; 41:408-414. [PMID: 37579132 DOI: 10.1089/photob.2023.0039] [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] [Indexed: 08/16/2023] Open
Abstract
Objective: This investigation aimed to compare the efficacy of circumferential supracrestal fiberotomy (CSF) with surgical scalpel, laser CSF, and photobiomodulation for reduction of relapse after orthodontic tooth rotation. Background: Relapse is the tendency of teeth to move back to their preoperative position after removal of orthodontic appliances. Materials and methods: This randomized controlled clinical trial was conducted on 90 rotated teeth at the final stages of fixed orthodontic treatment. The teeth were randomly divided into six groups (n = 15) of (1) control (no intervention), (2) photobiomodulation alone (wavelength of 940 nm, 0.2 W, and 4 J/cm2), (3) conventional CSF, (4) laser CSF (wavelength of 940 nm, 1.5 W, and 4 J/cm2, and power density of 160 mW/cm2), (5) conventional CSF plus photobiomodulation, and (6) laser CSF plus photobiomodulation. Measurements were made on clinical photographs and dental casts using the AutoCAD software. Level of pain of patients was measured within the first 24 h after fiberotomy using a visual analog scale. Data were analyzed by ANOVA and Kruskal-Wallis test (α = 0.05). Results: The magnitude (p = 0.014) and percentage (p = 0.035) of relapse were significantly different among the six groups, and they were the highest in the control group followed by photobiomodulation alone, laser CSF, conventional CSF, conventional CSF plus photobiomodulation, and finally, laser CSF plus photobiomodulation. Moreover, photobiomodulation plus laser CSF and photobiomodulation plus conventional CSF had significantly different results from the other groups. The six groups had no significant difference in sulcus depth changes, gingival recession (difference in primary and secondary crown height), or pain score (p > 0.05). Conclusions: This study suggests that utilizing photobiomodulation combined with laser CSF or conventional CSF can be effective in reducing relapse. However, further clinical trials are required to support this idea. Iranian Registry of Clinical Trials (IRCT20210621051653N1).
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Affiliation(s)
- Avideh Maboudi
- Department of Periodontology, Dental Research Center, Mazandaran University of Medical Sciences, Sari, Iran
- Faculty of Dentistry, Mazandaran University of Medical Sciences, Sari, Iran
| | - Reza Fekrazad
- Department of Periodontology, Dental Faculty, Laser Research Center in Medical Sciences, AJA University of Medical Sciences, Tehran, Iran
| | - Mahmood Moosazadeh
- Gastrointestinal Cancer Research Center, Mazandaran University of Medical Sciences, Sari, Iran
| | | | | | - Parastoo Namdar
- Faculty of Dentistry, Mazandaran University of Medical Sciences, Sari, Iran
- Department of Orthodontics, Dental Research Center, Mazandaran University of Medical Sciences, Sari, Iran
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The effectiveness of adjuncts or alternatives to the use of orthodontic retainers in preserving posttreatment outcomes: A systematic review. Am J Orthod Dentofacial Orthop 2023; 163:9-21.e3. [PMID: 36335023 DOI: 10.1016/j.ajodo.2022.08.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/01/2022] [Accepted: 08/01/2022] [Indexed: 11/06/2022]
Abstract
INTRODUCTION The objective of this study was to systematically evaluate the efficacy of adjuncts or alternatives to mechanical retention in preserving postorthodontic treatment outcomes. METHODS Electronic databases, unpublished literature, and ongoing trials were searched until July 22, 2022 (PROSPERO CRD42021291165). Randomized and nonrandomized controlled trials investigating the efficacy of adjuncts and alternatives to conventional orthodontic retainers were included. Stability, periodontal effects, cost-effectiveness, and patient-reported outcomes were to be evaluated. The Cochrane Risk of Bias Tool and Risk of Bias In Nonrandomized Studies of Interventions (ROBINS-I) were used for risk of bias assessment. The certainty of the evidence was appraised using the Grading of Recommendations Assessment, Development, and Evaluation system. Exploratory sensitivity analysis was undertaken to calculate the weighted treatment effects of the intervention. RESULTS A total of 5128 records were screened. Seven trials fulfilled the inclusion criteria, of which 5 were randomized controlled trials. Five trials were judged to be at high risk of bias, with 2 studies of unclear risk of bias. Heterogeneity between the limited number of included studies precluded the conduct of meta-analysis. Circumferential supracrestal fibrotomy resulted in less increase in the mandibular Little's Irregularity Index (mean difference, -2.30 mm; 95% confidence interval, -2.86 to -1.74). The overall level of evidence was of very low quality. CONCLUSIONS Adjuncts and alternatives to mechanical retention have promise, but based on the existing evidence, the reliance on mechanical retention cannot be reduced. There is weak evidence supporting circumferential supracrestal fibrotomy to improve stability outcomes. Further high-quality prospective research focusing on the predictability and acceptability of these approaches is needed.
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Amaral Vargas EO, de Melo Magalhães K, Pereira Ferreira DMT, Marañón-Vásquez G, Sant'anna EF, Maia LC, Pithon MM. Clinical parameters in soft tissue adjunctive periodontal procedures for orthodontic patients: surgical laser vs scalpel. Angle Orthod 2022; 92:265-274. [PMID: 34875012 PMCID: PMC8887394 DOI: 10.2319/022621-159.1] [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: 07/01/2021] [Accepted: 10/01/2021] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To systematically review existing literature regarding clinical parameters comparing surgical laser and conventional surgery with scalpel for soft tissue adjunctive periodontal procedures in orthodontic patients. METHODS AND MATERIALS MEDLINE, Scopus, Web of Science, The Cochrane Library, LILACS, Bibliografia Brasileira de Odontologia (Brazilian Dental Literature - BBO), Embase, Open Grey, Portal de Periódicos da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Coordination for the Improvement of Higher Education Personnel - CAPES), and Google Scholar were searched up to December 2020 without language restriction. Clinical trials comparing clinical parameters from surgical laser and conventional surgery with scalpel for soft tissue adjunctive periodontal procedures in orthodontic patients were selected. Risk of bias (RoB) assessments were performed using the Cochrane RoB2 tool. Narrative syntheses were performed, and the certainty of evidence was determined using the GRADE tool. RESULTS Five randomized clinical trials were included. One study was rated as low RoB, whereas others presented some concerns or high RoB. The studies were highly heterogeneous in relation to the procedure performed, laser protocol, outcomes evaluated, and follow-up periods. In general, regardless of the procedure and laser protocol used, the studies did not show significant differences between laser and scalpel for the outcomes of probing pocket depth, clinical crown length, gingival index, and relapse rate. Pain and bleeding were significantly lower with the use of laser compared with the scalpel. The certainty of evidence ranged from moderate to very low. CONCLUSIONS The existing literature on the subject is scarce and very heterogeneous and has methodological limitations. Based on the available evidence, it is not possible to draw definitive conclusions about the beneficial effect of laser use in orthodontic patients.
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Tokhtah H, Alhadlaq A. Ability of piezocision to retain orthodontically moved teeth in a goat model: A split-mouth study. J Orthod Sci 2022; 11:44. [PMID: 36188203 PMCID: PMC9515555 DOI: 10.4103/jos.jos_28_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/30/2022] [Accepted: 05/26/2022] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVES: to evaluate the effectiveness of piezocision in enhancing retention when performed after orthodontic tooth movement. METHODS: Four mature goats had their second incisors removed bilaterally. For each goat, the two sides of the mandible were either treated with piezocision or served as a positive control. Using fixed orthodontic appliance, the first and third incisors on each side were approximated and then retained in place for two weeks. Relapse was measured by the amount of space developed between the approximated incisors after six weeks from the end of the retention period. The periodontal ligament of all incisors was assessed histologically with micro computed tomography and regular hematoxylin and eosin staining. RESULTS: A significantly less relapse was observed in the piezocision group than in the control group (p ≤ 0.05). Bone formation occurs in the vicinity and periphery of the periodontal ligament and thus results in the narrowing of the periodontal ligament. CONCLUSION: A protocol of post-orthodontic retention involving piezocision can be promising to enhance stability of orthodontic treatment outcome.
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Cordaro M, Staderini E, Torsello F, Grande NM, Turchi M, Cordaro M. Orthodontic Extrusion vs. Surgical Extrusion to Rehabilitate Severely Damaged Teeth: A Literature Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:9530. [PMID: 34574454 PMCID: PMC8469087 DOI: 10.3390/ijerph18189530] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/29/2021] [Accepted: 09/01/2021] [Indexed: 11/16/2022]
Abstract
The need to rehabilitate severely compromised teeth is frequent in daily clinical practice. Tooth extraction and replacement with dental implant represents a common treatment choice. However, the survival rate for implants is inferior to teeth, even if severely damaged but properly treated. In order to reestablish a physiological supracrestal tissue attachment of damaged teeth and to arrange an efficient ferrule effect, three options can be considered: crown lengthening, orthodontic extrusion and surgical extrusion. Crown lengthening is considered an invasive technique that causes the removal of part of the bony support, while both orthodontic and surgical extrusion can avoid this inconvenience and can be used successfully in the treatment of severely damaged teeth. The aim of the present narrative review is to compare advantages, disadvantages, time of therapy required, contraindications and complications of both techniques.
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Affiliation(s)
- Martina Cordaro
- IRCCS, Fondazione Policlinico Universitario Agostino Gemelli, 00168 Roma, Italy; (M.C.); (F.T.); (N.M.G.); (M.T.); (M.C.)
- Department of Orthodontics, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy
- Department of Endodontics, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy
| | - Edoardo Staderini
- IRCCS, Fondazione Policlinico Universitario Agostino Gemelli, 00168 Roma, Italy; (M.C.); (F.T.); (N.M.G.); (M.T.); (M.C.)
- Department of Orthodontics, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy
| | - Ferruccio Torsello
- IRCCS, Fondazione Policlinico Universitario Agostino Gemelli, 00168 Roma, Italy; (M.C.); (F.T.); (N.M.G.); (M.T.); (M.C.)
- Department of Orthodontics, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy
| | - Nicola Maria Grande
- IRCCS, Fondazione Policlinico Universitario Agostino Gemelli, 00168 Roma, Italy; (M.C.); (F.T.); (N.M.G.); (M.T.); (M.C.)
- Department of Endodontics, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy
| | - Matteo Turchi
- IRCCS, Fondazione Policlinico Universitario Agostino Gemelli, 00168 Roma, Italy; (M.C.); (F.T.); (N.M.G.); (M.T.); (M.C.)
- Department of Orthodontics, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy
| | - Massimo Cordaro
- IRCCS, Fondazione Policlinico Universitario Agostino Gemelli, 00168 Roma, Italy; (M.C.); (F.T.); (N.M.G.); (M.T.); (M.C.)
- Department of Orthodontics, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy
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The rationale for orthodontic retention: piecing together the jigsaw. Br Dent J 2021; 230:739-749. [PMID: 34117429 DOI: 10.1038/s41415-021-3012-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 03/08/2021] [Indexed: 12/12/2022]
Abstract
Retaining teeth in their corrected positions following orthodontic treatment is one of the most challenging aspects of orthodontic practice. Despite much research, the rationale for retention is not entirely clear. Teeth tend to revert to their pre-treatment positions due to periodontal and gingival, soft tissue, occlusal and growth factors. Changes may also follow normal dentofacial ageing and are unpredictable with great variability. In this overview, each of these factors are discussed with their implications for retention, along with adjunctive procedures to minimise relapse. The state of current knowledge, methods used to assess relapse, factors regarded as predictive of or associated with stability as well as overcorrection are outlined. Potential areas requiring further investigation are suggested. The way in which the clinician may manage current retention practice, with a need for individualised retention plans and selective retainer wear, is also considered.
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Papagiannis A, Koletsi D, Halazonetis DJ, Sifakakis I. Relapse 1 week after bracket removal: a 3D superimpositional analysis. Eur J Orthod 2021; 43:128-135. [PMID: 32296827 DOI: 10.1093/ejo/cjaa024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVES To measure tooth movement 1 week post-treatment and assess potential correlation with changes invoked during treatment. SUBJECTS AND METHODS Thirty-eight patients were recruited (19 males, 19 females). Polyvinyl siloxane impressions were taken after bracket debonding (T1) and 1 week later (T2) and digitally scanned. During this period no retention was used. The digital casts were superimposed on structures of the hard palate. Translation and rotation of the first molars, canines, and central incisors were recorded. Additionally, movement of these teeth was assessed from the beginning (T0) until the end of treatment (T1). The correlation between the post-treatment relapse (T1-T2) and tooth movement during treatment (T0-T1) was investigated via the Spearman correlation coefficient. RESULTS Relapse was detected and reflected changes in tooth position during treatment. For the first molars (right, left) the correlation between treatment and post-treatment tooth movement was evident in the transverse direction (r = -0.38, P = 0.020; r = -0.32, P = 0.052), tipping (r = -0.40, P = 0.015; r = -0.34, P = 0.034) and the antero-posterior direction (r = -0.31, P = 0.061; r = -0.36, P = 0.027); for the canines (right and left), as rotation around their long axis (r = -0.55, P = 0.003; r = -0.58, P = 0.002); for central incisors (right and left) in the antero-posterior direction (r = -0.55, P = 0.000; r = -0.48, P = 0.03), transverse direction (r = -0.43, P = 0.07; r = -0.32, P = 0.047), and rotation around their long axis (r = -0.53, P = 0.001; r = -0.28, P = 0.089). CONCLUSIONS Post-treatment changes in tooth position were mostly related to tooth movement during treatment. The reported correlations may help clinicians predict short-term relapse, evaluate long-term retention need, and design individualized retention schemes.
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Affiliation(s)
- Alexandros Papagiannis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Greece
| | - Despina Koletsi
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Greece.,Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zürich, Switzerland
| | - Demetrios J Halazonetis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Greece
| | - Iosif Sifakakis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Greece
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Demirsoy KK, Kurt G. Use of Laser Systems in Orthodontics. Turk J Orthod 2020; 33:133-140. [PMID: 32637195 PMCID: PMC7316475 DOI: 10.5152/turkjorthod.2020.18099] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 08/25/2019] [Indexed: 01/01/2023]
Abstract
Laser systems have been used in the practice of dentistry for >35 years. Laser systems have so many advantages, such as increase patient cooperation, reduce the duration of treatment time, and help the orthodontists to enhance the design of a patient's smile to improve treatment efficacy, and the success of orthodontic treatments can also be improved by diminishing the orthodontic pain and the discomfort of the patients. Laser systems also have some disadvantages, such as cost, large space requirements for some types, and high-risk potential for physician and patient if not used at the appropriate wavelength and power density, that is why before incorporating lasers into clinical practice, the physician must fully understand the basic science, safety protocol, and risks associated with them. Lasers have many applications in orthodontics, including accelerating tooth movement, bonding and debonding processes, pain reduction, bone regeneration, etching procedures, increase mini-implant stability, soft tissue procedures (gingivectomy, frenectomy, operculectomy, papilla flattening, uncovering temporary anchorage devices, ablation of aphthous ulcerations, and exposure of impacted teeth), fiberotomy, scanning systems, and welding procedures. In reviewing the literature on the use of laser in orthodontics, many studies have been conducted. The purpose of the present study was to give information about the use of laser in the field of orthodontics, the effects of laser during the postoperative period, and its advantages and disadvantages and to provide general information about the requirements to be considered during the use of laser.
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Affiliation(s)
- Kevser Kurt Demirsoy
- Department of Orthodontics, Faculty of Dentistry Nevşehir Hacı Bektaş Veli University, Nevsehir, Turkey
| | - Gökmen Kurt
- Department of Orthodontics, Bezmialem Vakıf University School of Dentistry, İstanbul, Turkey
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da Silva VC, de Molon RS, Martins RP, Ribeiro FS, Pontes AEF, Zandim-Barcelos DL, Leite FRM, Benatti Neto C, Marcantonio RAC, Cirelli JA. Effects of orthodontic tooth extrusion produced by different techniques, on the periodontal tissues: a histological study in dogs. Arch Oral Biol 2020; 116:104768. [PMID: 32480012 DOI: 10.1016/j.archoralbio.2020.104768] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 05/11/2020] [Accepted: 05/12/2020] [Indexed: 01/18/2023]
Abstract
OBJECTIVE The aim of this study was to compare the periodontal tissue changes resulting from different methods of orthodontic tooth extrusion in dogs. MATERIALS AND METHODS Notches were surgically prepared in the root surface at the bone crest level of the first premolars of mongrel dogs. After 37 days, extrusion of the first lower and upper premolars was randomly performed by 3 different methods: conventional orthodontic extrusion (OE); open flap debridement performed immediately before orthodontic extrusion (OF); and orthodontic extrusion associated with weekly fiberotomy and scaling (FS). For all groups, extrusion was performed for 21 days followed by one-month retention and sacrifice. Periodontal parameters, descriptive histology, and histomorphometric analyses were performed at the end of the experimental period. RESULTS The median extrusion was 2.25 in the fiberotomy group, 2.0 mm in the open flap group and 1.0 mm in the orthodontic extrusion group with no significant differences between groups. The highest distance between reference notch and bone crest was observed in the fiberotomy group (p < 0.05). Histologically, radicular resorption repaired with cellular cementum was detected in all groups. CONCLUSIONS Tooth extrusion was successfully achieved with all of the different methods of orthodontic tooth extrusion with no statistical significance between techniques. The fiberotomy approach was effective in avoiding coronal displacement of periodontal tissues. Fiberotomy associated with scaling should be indicated if the objective of the treatment is extrusion without periodontal tissue displacement.
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Affiliation(s)
- Vanessa Camila da Silva
- Department of Dentistry II, School of Dentistry at São Luís, Maranhão Federal University - UFMA, São Luís, Maranhão, Brazil.
| | - Rafael Scaf de Molon
- Department of Diagnostic and Surgery, School of Dentistry at Araraquara, Universidade Estadual Paulista (UNESP), Araraquara, São Paulo, Brazil
| | | | | | | | - Daniela Leal Zandim-Barcelos
- Department of Diagnostic and Surgery, School of Dentistry at Araraquara, Universidade Estadual Paulista (UNESP), Araraquara, São Paulo, Brazil
| | | | - Carlos Benatti Neto
- Department of Physiology and Pathology, School of Dentistry at Araraquara, Universidade Estadual Paulista (UNESP), Araraquara, São Paulo, Brazil
| | | | - Joni Augusto Cirelli
- Department of Diagnostic and Surgery, School of Dentistry at Araraquara, Universidade Estadual Paulista (UNESP), Araraquara, São Paulo, Brazil
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Al-Jasser R, Al-Jewair T, Al-Rasheed A. One-year rotational relapse frequency following conventional circumferential supracrestal fiberotomy. World J Clin Cases 2020; 8:284-293. [PMID: 32047776 PMCID: PMC7000953 DOI: 10.12998/wjcc.v8.i2.284] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 12/17/2019] [Accepted: 12/21/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Relapse following orthodontic treatment has been a common problem that can occur due to several factors. It was suggested that surgical circumferential supracrestal fiberotomy (CSF) is an effective measure to reduce this relapse. However, very few studies have reported the amount of relapse that occurs afterward. AIM To assess the frequency of rotational relapse on anterior teeth 1 year following CSF. METHODS Eleven adults (six male and five female) with a mean age of 23 years (standard deviation = 5.2), who had a total of 90 rotated anterior teeth, were included in this study. CSF was performed after comprehensive orthodontic treatment involving the use of full-fixed preadjusted edgewise appliances (Victory Series APC, 3M, United States) with a 0.022-inch slot and Roth prescription brackets (Ovation; DENTSPLY GAC, Bohemia, New York, United States) and placement of a fixed lingual retainer from canine to canine in both arches using a 0.016 Australian wire (AJ Wilcock, Australia). Degrees of rotational correction and relapse were measured on three sets of casts [pretreatment, post-treatment (at the debond visit), and 1-year post-treatment]. Rotational relapse was categorized as follows: Unnoticeable relapse (0°), barely noticeable relapse (1°-3°), noticeable relapse (4°-9°), and clearly noticeable relapse (≥ 10°). The percent relapse that had occurred 1 year after teeth were aligned to their ideal position was calculated. Data were analyzed by dental arch type and tooth types. RESULTS Mean rotational correction was 14.05° during posttreatment. Mean relapse at 1-year follow-up was 1.1° (10.8%). More than half (n = 52, 57.8%) of teeth were categorized as having unnoticeable relapse (0°). Of the remaining teeth, 31 (34.5%) had barely noticeable relapse (1°-3°), 6 (6.6%) had noticeable relapse (4°-9°), and only one (1.1%) had clearly noticeable relapse (> 10°). When analyzed by arch, 54.5% (n = 6) of the relapsed maxillary teeth had barely noticeable relapse (1°-3°). While most of the mandibular teeth (3, 37.5%) fell into noticeable relapse category (4°-9°), only 1 (12.5%) tooth had clearly noticeable relapse (≥ 10°). CONCLUSION When relapse was measured following CSF, it was found to be more pronounced in maxillary than in mandibular arch. Most frequent relapse was found in maxillary lateral incisors and mandibular canines.
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Affiliation(s)
- Reham Al-Jasser
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Thikriat Al-Jewair
- Graduate Program Director in Orthodontics, School of Dental Medicine, State University of New York, Buffalo, NY 14214, United States
| | - Abdulaziz Al-Rasheed
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
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Al-Jasser R, Al-Subaie M, Al-Jasser N, Al-Rasheed A. Rotational relapse of anterior teeth following orthodontic treatment and circumferential supracrestal fiberotomy. Saudi Dent J 2019; 32:293-299. [PMID: 32874069 PMCID: PMC7452021 DOI: 10.1016/j.sdentj.2019.10.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 10/06/2019] [Accepted: 10/07/2019] [Indexed: 02/08/2023] Open
Abstract
Background/purpose Several factors cause relapse of orthodontically de-rotated teeth after appliance removal. Circumferential supracrestal fiberotomy (CSF) may release the tension on the supra-alveolar fibers following tooth de-rotation, thereby reducing the relapse risk. However, careful identification of the amount and location of relapse enables proper clinical evaluation. We aimed to determine the amount of orthodontic relapse following CSF for de-rotated anterior teeth. Materials and methods Eleven patients with 90 orthodontically de-rotated anterior teeth were enrolled. CSF was performed after orthodontic treatment, during fixed retainer placement. Rotational correction and relapse were measured on three casts (preorthodontic treatment, cast 1; postorthodontic treatment + CSF, cast 2; and 12-month follow-up, cast 3). The Wilcoxon test was used to assess significant differences in the tooth rotation angles between casts 1 and 2 and casts 2 and 3. The relationship between the magnitude of relapse and pretreatment severity of rotation was assessed by the point biserial correlation test. The Mann-Whitney U test helped in identifying significant differences in the amount of relapse between maxillary and mandibular teeth. Results The mean amount of rotational correction was 14.05°, while the mean amount and percentage of relapse were 1.1° and 10.8%, respectively [0.81° (8%) and 1.44° (14%) for maxillary and mandibular teeth, respectively]. The relapse amount was proportional to the pretreatment rotation severity, and it was larger for the mandibular canines. There was no significant difference in the amount of relapse between the maxillary and mandibular teeth (P = 0.07). Conclusion Post-treatment rotational relapse of anterior teeth subjected to CSF was minimal and statistically insignificant after 1 year of follow-up. This validates the promising results of CSF when combined with appropriate mechanical retention for an adequate period.
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Affiliation(s)
- Reham Al-Jasser
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, P.O. Box: 60169-37, Riyadh 11545, Saudi Arabia
| | - Mai Al-Subaie
- Department of Orthodontics, Prince Sultan Military Medical City, 40001, As Sulimaniyah, Riyadh 12233, Saudi Arabia
| | - Nasser Al-Jasser
- Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, P.O. Box: 65169-37, Riyadh 11545, Saudi Arabia
| | - Abdulaziz Al-Rasheed
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, P.O. Box: 60169-37, Riyadh 11545, Saudi Arabia
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Meng Y, Liu M, Deng QN. [Expression of myofibroblast in gingival after orthodontic loading]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2019; 37:537-540. [PMID: 31721504 DOI: 10.7518/hxkq.2019.05.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
OBJECTIVE To examine the expression of myofibroblast in gingival after orthodontic loading. METHODS Eight patients were selected as experimental group and treated with orthodontic force for 4 months. Ten patients were selected as the control group, were not loaded. The gingival protein expressions of collagen typeⅠ, collagen type Ⅲ, α-smooth muscle actin (α-SMA) were evaluated by immunohistochemistry method. RESULTS Positive expressions of collagen typeⅠ, collagen type Ⅲ were founded, while no positive staining for α-SMA in the gingival tissue except vascular epithelium before loading. In experimental group, collagen type I and collagen type Ⅲ were increased after orthodontic loading (P<0.05), the expression of α-SMA was detected and statistically significant (P<0.05). CONCLUSIONS The myofibroblast exists in gingival tissue after orthodontic loading, and it may be concerned with orthodontic teeth relapse.
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Affiliation(s)
- Yao Meng
- Dept. of Orthodontics, Shenzhen Children's Hospital, Shenzhen 518000, China
| | - Man Liu
- Medical Technic & Nursing School, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Qian-Nan Deng
- Dept. of Orthodontics, Shenzhen Children's Hospital, Shenzhen 518000, China
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