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Bruni A, Ferrillo M, Gallo V, Parrini S, Garino F, Castroflorio T, Deregibus A. Efficacy of clear aligners vs rapid palatal expanders on palatal volume and surface area in mixed dentition patients: A randomized controlled trial. Am J Orthod Dentofacial Orthop 2024:S0889-5406(24)00144-6. [PMID: 39066746 DOI: 10.1016/j.ajodo.2024.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 04/01/2024] [Accepted: 04/01/2024] [Indexed: 07/30/2024]
Abstract
INTRODUCTION This study aimed to evaluate the efficacy of Invisalign First Phase I treatment compared with tooth-borne rapid maxillary expansion (RME) in mixed dentition patients by examining changes in palatal volume, palatal surface area, and maxillary interdental transverse measurements. METHODS In this open-label, 2-arm, parallel, randomized controlled trial, patients with a posterior transverse discrepancy ≤6 mm were allocated into the clear aligner therapy (CAT) group (Invisalign First Phase I treatment) and RME group (tooth-borne RME) according to a computer-generated randomization list immediately before the start of treatment. Digital models were obtained before the beginning of the treatment (T0) and at the end of the retention period/treatment (T1) using an intraoral scanner. Palatal volume was measured as the primary outcome, and palatal surface area and intermolar and intercanine transverse widths at the cusps and gingival level were measured as secondary outcomes. Patients and interventionists were not blinded because of the nature of the intervention. RESULTS Out of 50 patients, 41 (19 males and 22 females; mean age, 8.12 ± 1.53 years) were enrolled and divided into 2 groups: 20 in the CAT group and 21 in the RME group. Two participants did not receive the allocated intervention for different reasons (1 patient discontinued the intervention in the CAT group, and another patient was lost to follow-up in the RME group). Thus, 19 patients (5 males and 14 females; mean age, 8.48 ± 1.42 years) were analyzed from the CAT group, and 20 patients (12 males and 8 females; mean age, 7.83 ± 1.19 years) from the RME group. Regarding intragroup comparisons, all outcome measures significantly increased from T0 to T1 in both groups. In terms of intergroup comparisons, there were no significant differences in the variation (Δ) of outcome measures between the 2 groups from T0 to T1, except for the intermolar width at the gingival level (P <0.005). The change in palatal volume was 532.01 ±540.52 mm³ for the RME group and 243.95 ± 473.24 mm³ for the CAT group (P = 0.310), with a moderate effect size (d = ∼1.136). CONCLUSIONS RME exhibited superior results compared with the Invisalign First Phase I treatment, considering all the assessed outcome measures. The only parameter that showed statistically significant differences between the 2 groups was variation in intermolar width at the gingival level, suggesting the occurrence of buccal tipping in patients undergoing Invisalign First Phase I treatment. TRIAL REGISTRATION The trial was registered at ClinicalTrial.gov (no. NCT04760535).
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Affiliation(s)
- Alessandro Bruni
- Department of Surgical Sciences, CIR Dental School, Università degli Studi di Torino, Turin, Italy; Surgical, Medical and Dental Department, University of Modena and Reggio Emilia, Modena, Italy.
| | - Martina Ferrillo
- Dentistry Unit, Department of Health Sciences, Università degli Studi di Catanzaro "Magna Graecia", Catanzaro, Italy
| | - Vittorio Gallo
- Department of Surgical Sciences, CIR Dental School, Università degli Studi di Torino, Turin, Italy
| | - Simone Parrini
- Department of Surgical Sciences, CIR Dental School, Università degli Studi di Torino, Turin, Italy
| | | | | | - Andrea Deregibus
- Department of Surgical Sciences, CIR Dental School, Università degli Studi di Torino, Turin, Italy
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Tepedino M, Montaruli G, Esposito R, Akhilanand C, Lorusso M, Laurenziello M, Ciavarella D. Skeletal and dental effects of function-generating bite appliance compared to rapid palatal expander and untreated controls. Orthod Craniofac Res 2024; 27:455-464. [PMID: 38180289 DOI: 10.1111/ocr.12754] [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] [Accepted: 12/23/2023] [Indexed: 01/06/2024]
Abstract
INTRODUCTION Maxillary expansion is a fundamental interceptive orthodontic treatment, which can be achieved through either a rapid expansion protocol or functional devices. However, no data exist about the efficacy of functional devices in achieving skeletal expansion. Therefore, the aim of this study was to compare the effects of the rapid palatal expander (RPE) and the function-generating bite type M (FGB-M) on the transversal dimension of the maxilla, and on the maxillary and mandibular dental arch width. METHODS One hundred eighty-one skeletal Class I patients, aged between 6 and 12 years and with a cervical vertebral maturation stage II or III, with maxillary transversal deficiency were retrospectively enrolled; among these 55 were treated with FGB-M, 73 were treated with RPE and 51 were untreated subjects retrieved from historical databases. The pre-treatment (T0) and post-treatment (T1) frontal cephalograms were retrieved, and the maxillary and mandibular widths, and the distance between upper and lower first molars were measured. T1-T0 interval was of 17.3 months (RPE), 24.6 months (FGB-M) and 18.2 months (controls). RESULTS The statistical analysis showed that there were no statistically significant differences between the RPE and FGB-M groups regarding skeletal and dental expansion, while the untreated control group differed significantly from the other two groups. CONCLUSION The comparison between patients treated with RPE and FGB-M showed that there were no statistically significant differences between the RPE and FGB-M groups regarding the amount of skeletal expansion and dental arch width, suggesting that both appliances can be used to achieve similar results.
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Affiliation(s)
- Michele Tepedino
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Graziano Montaruli
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Rosa Esposito
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Chaurasia Akhilanand
- Department of Oral Medicine and Radiology, Faculty of Dental Sciences, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Mauro Lorusso
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Michele Laurenziello
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Domenico Ciavarella
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
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Seifelnasr A, Ding P, Si X, Biondi A, Xi J. Oropharyngeal swallowing hydrodynamics of thin and mildly thick liquids in an anatomically accurate throat-epiglottis model. Sci Rep 2024; 14:11945. [PMID: 38789468 PMCID: PMC11126673 DOI: 10.1038/s41598-024-60422-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Accepted: 04/23/2024] [Indexed: 05/26/2024] Open
Abstract
Understanding the mechanisms underlying dysphagia is crucial in devising effective, etiology-centered interventions. However, current clinical assessment and treatment of dysphagia are still more symptom-focused due to our limited understanding of the sophisticated symptom-etiology associations causing swallowing disorders. This study aimed to elucidate the mechanisms giving rise to penetration flows into the laryngeal vestibule that results in aspirations with varying symptoms. Methods: Anatomically accurate, transparent throat models were prepared with a 45° down flapped epiglottis to simulate the instant of laryngeal closure during swallowing. Fluid bolus dynamics were visualized with fluorescent dye from lateral, rear, front, and endoscopic directions to capture key hydrodynamic features leading to aspiration. Three influencing factors, fluid consistency, liquid dispensing site, and dispensing speed, were systemically evaluated on their roles in liquid aspirations. Results: Three aspiration mechanisms were identified, with liquid bolus entering the airway through (a) the interarytenoid notch (notch overflow), (b) cuneiform tubercle recesses (recess overflow), and (c) off-edge flow underneath the epiglottis (off-edge capillary flow). Of the three factors considered, liquid viscosity has the most significant impact on aspiration rate, followed by the liquid dispensing site and the dispensing speed. Water had one order of magnitude higher aspiration risks than 1% w/v methyl cellulose solution, a mildly thick liquid. Anterior dispensing had higher chances for aspiration than posterior oropharyngeal dispensing for both liquids and dispensing speeds considered. The effects of dispending speed varied. A lower speed increased aspiration for anterior-dispensed liquids due to increased off-edge capillary flows, while it significantly reduced aspiration for posterior-dispensed liquids due to reduced notch overflows. Visualizing swallowing hydrodynamics from multiple orientations facilitates detailed site-specific inspections of aspiration mechanisms.
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Affiliation(s)
- Amr Seifelnasr
- Department of Biomedical Engineering, University of Massachusetts, 1 University Ave., Falmouth Hall 302I, Lowell, MA, 01854, USA
| | - Peng Ding
- Department of Otolaryngology-Head and Neck Surgery, Cleveland Clinic Lerner College of Medicine, 9501 Euclid Ave, Cleveland, OH, 44195, USA
| | - Xiuhua Si
- Department of Mechanical Engineering, California Baptist University, 8432 Magnolia Ave, Riverside, CA, 92504, USA
| | - Andres Biondi
- Department of Electrical and Computer Engineering, University of Massachusetts, 1 University Ave., Lowell, MA, 01854, USA
| | - Jinxiang Xi
- Department of Biomedical Engineering, University of Massachusetts, 1 University Ave., Falmouth Hall 302I, Lowell, MA, 01854, USA.
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Ferrillo M, Daly K, Pandis N, Fleming PS. The effect of vertical skeletal proportions, skeletal maturation, and age on midpalatal suture maturation: a CBCT-based study. Prog Orthod 2024; 25:4. [PMID: 38311670 PMCID: PMC10838892 DOI: 10.1186/s40510-023-00504-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 11/27/2023] [Indexed: 02/06/2024] Open
Abstract
BACKGROUND Midpalatal suture (MPS) maturation may be influenced by a range of parameters including age, gender, and vertical skeletal pattern. We therefore aimed to evaluate the effect of Frankfurt-mandibular angle (FMA), skeletal maturation, and age on the timing of MPS maturation. METHODS In this cross-sectional study, cone-beam computed tomography (CBCT) and lateral cephalograms were used to assess the MPS and cervical vertebral maturation (CVM) stage. A proportional odds logistic regression model was used to assess associations between age adjusted for gender and MPS maturation, and a regression analysis was performed to analyze the effect of vertical pattern on these associations. RESULTS A total of 201 patients (84 male and 117 female) with a mean age of 13.48 (SD 1.94) were included. With increasing age, the odds of belonging to a higher maturation stage increased (OR: 2.14; 95% CI 1.789; 2.567; P < 0.001); however, no association between FMA and MPS maturation was observed (OR: 1.01; 95% CI 0.964; 1.051; P = 0.76). A strong correlation between MPS maturation and CVM stage was not reported. Males had a higher probability of belonging to a lower MPS maturation stage (OR: 0.24; 95% CI 0.136; 0.415; P < 0.001). CONCLUSIONS Based on this cross-sectional analysis, midpalatal sutural maturation classification is associated with chronological age and occurs later in males. Neither CVM staging nor variation in vertical skeletal proportions were useful predictors of midpalatal maturation stage.
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Affiliation(s)
- Martina Ferrillo
- Dentistry Unit, Department of Health Sciences, University of Catanzaro "Magna Graecia", Catanzaro, Italy
- Dublin Dental University Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | | | - Nikolaos Pandis
- Department of Orthodontics and Dentofacial Orthopedics, Dental School, Medical Faculty, University of Bern, Bern, Switzerland
| | - Padhraig S Fleming
- Dublin Dental University Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland.
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Bruni A, Abate A, Maspero C, Castroflorio T. Comparison of Mechanical Behavior of Clear Aligner and Rapid Palatal Expander on Transverse Plane: An In Vitro Study. Bioengineering (Basel) 2024; 11:103. [PMID: 38391589 PMCID: PMC10886082 DOI: 10.3390/bioengineering11020103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/09/2024] [Accepted: 01/19/2024] [Indexed: 02/24/2024] Open
Abstract
(1) Background: This study aims to investigate, within a controlled laboratory environment, the magnitude of the transversal load and the force decay over time produced by clear aligners in comparison to a Rapid Palatal Expander (RPE). (2) Methods: Resin models of a dental maxillary arch, additively manufactured from an intraoral scan, were inserted in a testing machine with uniaxial load cells to measure the force trend over time expressed by RPE and clear aligners. The mechanical load was recorded during a certain timeframe for both appliances. (3) Results: The force expressed by the RPE ranged from 30 to 50 N for each activation, decreasing with a nonlinear pattern over time. The force expressed by the clear aligner ranged from 3 to 5 N, decreasing with a linear pattern over time. In contrast, the force generated by the clear aligner fell within the range of 3 to 5 N, showing a linear reduction in force magnitude over the observed period of time. (4) Conclusions: The RPE exerted a force magnitude approximately ten times greater than that generated by clear aligners. Nevertheless, it is essential to acknowledge that the oral environment can significantly influence these results. These limitations underscore the need for caution when applying these findings to clinical settings.
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Affiliation(s)
- Alessandro Bruni
- Surgical, Medical and Dental Department, University of Modena and Reggio Emilia, 41124 Modena, Italy
| | - Andrea Abate
- Department of Sciences Integrated Surgical and Diagnostic, University of Genova, 16126 Genova, Italy
| | - Cinzia Maspero
- Department of Biomedical Surgical and Dental Sciences, University of Milan, 20142 Milan, Italy
- Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, 20122 Milan, Italy
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Feng Z, Si M, Fan H, Zhang Y, Yuan R, Hao Z. Evolution, current status, and future trends of maxillary skeletal expansion: a bibliometric analysis. Clin Oral Investig 2023; 28:14. [PMID: 38129341 PMCID: PMC10739547 DOI: 10.1007/s00784-023-05430-3] [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: 07/20/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023]
Abstract
OBJECTIVES The study aims to conduct a bibliometric analysis on maxillary skeletal expansion to elucidate the evolution and current status and predict future research hotspots and trends. MATERIAL AND METHODS A search was conducted in the Web of Science Core Collection at the University of Hong Kong's electronic library using the query "(TS = maxillary expansion) AND (TS = skeletal expansion)." The resulting literature data were imported into CiteSpace 6.2.R4 and VOS viewer software to analyze authorship, countries, institutions, keywords, etc. RESULTS: A total of 923 articles were analyzed. The research in this field has shown a steady growth, with a significant increase since 2019. The USA and Italy have played prominent roles in contributing to the publication volume and strengthening collaborative exchanges. Clustering labels provide directions for in-depth analysis of the literature. CONCLUSIONS (1) MARPE (miniscrew-assisted rapid palatal expansion) and SARME (surgically assisted rapid maxillary expansion) have gained widespread attention and become research hotspots due to their applicability in adults whose growth and development have ceased, while still producing favorable skeletal effects. (2) In addition to widening the maxillary arch, maxillary expansion techniques have shown significant effects on increasing nasal cavity width and volume. However, there is still controversy regarding whether they can effectively improve the deviated nasal septum. (3) Maxillary skeletal expansion techniques have been shown to increase upper airway volume and improve breathing, making them potentially valuable in the treatment of obstructive sleep apnea (OSA). CLINICAL RELEVANCE This study can provide cutting-edge clinical recommendations for healthcare professionals to better formulate clinical strategies.
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Affiliation(s)
- Zhiyuan Feng
- Department of Orthodontics, Shanxi Provincial People's Hospital, The Fifth Clinical Medical College of Shanxi Medical University, Taiyuan, China.
| | - Minmin Si
- School and Hospital of Stomatology, Shanxi Medical University, Taiyuan, China
| | - Hao Fan
- Department of Orthodontics, Shanxi Provincial People's Hospital, The Fifth Clinical Medical College of Shanxi Medical University, Taiyuan, China
| | - Yin Zhang
- School of Information Engineering, Chang'an University, Xi'an, China
| | - Rui Yuan
- School and Hospital of Stomatology, Shanxi Medical University, Taiyuan, China
| | - Zhaonan Hao
- School and Hospital of Stomatology, Shanxi Medical University, Taiyuan, China
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Ronsivalle V, Isola G, Lo Re G, Boato M, Leonardi R, Lo Giudice A. Analysis of maxillary asymmetry before and after treatment of functional posterior cross-bite: a retrospective study using 3D imaging system and deviation analysis. Prog Orthod 2023; 24:41. [PMID: 38072875 PMCID: PMC10710971 DOI: 10.1186/s40510-023-00494-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 09/18/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Previous evidence would suggest that subjects affected by functional posterior cross-bite (FPXB) present an asymmetric morphology of the maxilla. However, no evidence is available concerning the morphology (symmetry/asymmetry) of the maxilla after treatment of FPXB. This study aimed to investigate the volumetric and morphological changes of the palate in FPXB subjects treated with maxillary expansion and to compare these data with an untreated control group. The study sample included 20 FPXB subjects (mean age 8.1 ± 0.9 years) who underwent maxillary expansion (MEG group) and 21 FPXB subjects (mean age 7.7 ± 1.2 years) as controls (CG group). Digital models were recorded at T0 (first observation) and T1 (12-18 months after first observation) and analyzed to assess palatal volume and symmetry. Deviation analysis and percentage matching calculation were also performed between original and mirrored palatal models for each patient. All data were statistically analyzed for intra-timing, inter-timing and inter-groups assessments. RESULTS At T0, the cross-bite side (CBS) was significantly smaller than non-cross-bite side (non-CBS) in both groups (p < 0.05). At T1, the CBS/non-CBS difference reduced significantly in the MEG group (p < 0.05) while slightly worsened in the CG, however without statistical significance (p > 0.05). The matching percentage of the palatal models improved significantly at T1 in the MEG group (T0 = 74.02% ± 9.8; T1 = 89.95% ± 7.12) (p < 0.05) while no significant differences were recorded in the CG (T0 = 76.36 ± 8.64; 72.18% ± 9.65) (p > 0.05). LIMITATIONS The small sample size and the retrospective design of the study represent two limitations that should be overcome with further clinical trials. CONCLUSIONS Subjects with FPXB present an asymmetric development of the maxillary vault that improves after reestablishment of normal occlusion following maxillary expansion.
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Affiliation(s)
- Vincenzo Ronsivalle
- Department of General Surgery and Medical-Surgical Specialties, Section of Orthodontics, University of Catania, Policlinico Universitario "Gaspare Rodolico - San Marco", Via Santa Sofia 78, 95123, Catania, Italy
| | - Gaetano Isola
- Department of General Surgery and Medical-Surgical Specialties, Section of Orthodontics, University of Catania, Policlinico Universitario "Gaspare Rodolico - San Marco", Via Santa Sofia 78, 95123, Catania, Italy
| | - Gianmarco Lo Re
- Department of General Surgery and Medical-Surgical Specialties, Section of Orthodontics, University of Catania, Policlinico Universitario "Gaspare Rodolico - San Marco", Via Santa Sofia 78, 95123, Catania, Italy
| | - Mattia Boato
- Department of General Surgery and Medical-Surgical Specialties, Section of Orthodontics, University of Catania, Policlinico Universitario "Gaspare Rodolico - San Marco", Via Santa Sofia 78, 95123, Catania, Italy
| | - Rosalia Leonardi
- Department of General Surgery and Medical-Surgical Specialties, Section of Orthodontics, University of Catania, Policlinico Universitario "Gaspare Rodolico - San Marco", Via Santa Sofia 78, 95123, Catania, Italy
| | - Antonino Lo Giudice
- Department of General Surgery and Medical-Surgical Specialties, Section of Orthodontics, University of Catania, Policlinico Universitario "Gaspare Rodolico - San Marco", Via Santa Sofia 78, 95123, Catania, Italy.
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Khan MK, Sharma DS, Jindal MK. Unusual systemic and nondental effects of maxillary expansion therapy: A comprehensive and updated review of literature. J Orthod Sci 2023; 12:38. [PMID: 37881659 PMCID: PMC10597365 DOI: 10.4103/jos.jos_25_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/17/2023] [Accepted: 05/15/2023] [Indexed: 10/27/2023] Open
Abstract
In dental practice, pediatric patients with a wide range of manifestations of malocclusion viz. crossbite, dental crowding, and skeletal Class III due to transverse discrepancy of the abnormally constricted maxilla or palate are found. However, the dental management of such kind of malocclusion with narrow palate needs a meticulous dental evaluation. Appliances used for treating such malocclusion conditions may include Slow-Maxillary Expansion (SME) or Rapid Maxillary Expansion (RME) orthodontic or orthopedic appliances. Considerable success has been described in the literature using the maxillary/palatal expansion modality. Unusual systemic and nondental effects of expansion appliances therapy have been described in some scientific studies. However, no comprehensive review article has been published describing the nondental and systemic effects of RME/SME therapy in Pediatric Dentistry. Considering the above scenarios, the updated and comprehensive review of the relevant literature is necessary for health professionals. Dental professionals including pediatric dentists and orthodontists need to consider such untoward or unexpected effects of RME/SME treatment modality. Hence, the current comprehensive review article has been written with the aim to meticulously describe the relevant scientific literature about nondental/extraoral and systemic effects of RME/SME appliances.
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Affiliation(s)
- Mohammad Kamran Khan
- Department of Pediatric and Preventive Dentistry, Faculty of Medicine, Aligarh Muslim University (A.M.U.), Aligarh, Uttar Pradesh, India
| | - Divya Sanjay Sharma
- Department of Pediatric and Preventive Dentistry, Faculty of Medicine, Aligarh Muslim University (A.M.U.), Aligarh, Uttar Pradesh, India
| | - Mahendra Kumar Jindal
- Department of Pediatric and Preventive Dentistry, Faculty of Medicine, Aligarh Muslim University (A.M.U.), Aligarh, Uttar Pradesh, India
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ElNaghy R, Al-Qawasmi R, Hasanin M. Do patient-reported outcomes of miniscrew-supported maxillary expansion in adolescent patients differ between slow and rapid activation protocol? Evid Based Dent 2023; 24:28-29. [PMID: 36890253 DOI: 10.1038/s41432-023-00858-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 01/17/2023] [Indexed: 03/10/2023]
Abstract
DESIGN Single-center randomized clinical trial with two parallel arms. The protocol of the study was approved by the institutional review board (IRB) of the Faculty of Dentistry, Alexandria University (IRB: 00010556-IORG: 0008839) and registered in Clinicaltrials.gov (identifier number: NCT04225637). Before the trial commencement, parents/legal guardians signed informed consents. The study complied with the CONSORT (Consolidated Standards of Reporting Trials). CASE SELECTION 30 adolescent patients aged between 12 to 16 years with transversely deficient maxilla requiring skeletal maxillary expansion were recruited to be included in the study. Patients received miniscrew-supported Penn expanders and they were randomly allocated (ratio 1:1) into two groups based on the activation protocol; slow maxillary expansion (SME = turn every other day) or rapid maxillary expansion (RME = 2 turn/day). DATA ANALYSIS The patient-reported outcome measures were the following: pain, headache, pressure, dizziness, speech, chewing and swallowing difficulties, swallowing difficulty. The participants rated the reported outcomes using numeric rating scale (NRS) at 4 time points: t1 = before appliance insertion, t2 = after first activation, t3 = after 1 week of activation, and t4 = after last activation. Patients were advised not to use analgesics, and to contact their provider in case of severe pain. Descriptive measures and patient-reported outcomes at various time points were calculated. Comparisons between the two groups at each time point were assessed using Mann-Whitney U-test. Comparisons of time points in each group were assessed using the Friedman test and followed by post-hoc tests with Bonferroni correction. RESULTS 6 patients were not included in the analysis for different reasons, allowing a total of 24 patients (12 patients in each group) to be analyzed. Mean ages of the patients in the SME and RME group were 14.30 ± 1.37 and 15.07 ± 1.59, respectively. Median scores were in the bottom quartiles of NRS for all reported outcomes. RME group reported significantly higher scores for all measured variables, with exception of headache and dizziness, which showed no statistical difference between the two group. CONCLUSIONS Mild to moderate discomfort and functional limitation is anticipated with the activation of miniscrew-anchored Penn expanders. Slow activation protocol provided a better overall patient experience when compared to a rapid activation protocol.
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Affiliation(s)
- Rahma ElNaghy
- Department of Graduate Orthodontics, University of Detroit Mercy, Detroit, MI, USA.
| | - Riyad Al-Qawasmi
- Department of Graduate Orthodontics, University of Detroit Mercy, Detroit, MI, USA
| | - Majd Hasanin
- Department of Graduate Orthodontics, University of Detroit Mercy, Detroit, MI, USA
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