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Keywords = mandibular crowding reduction

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16 pages, 520 KiB  
Systematic Review
Does Ankyloglossia Surgery Promote Normal Facial Development? A Systematic Review
by Małgorzata Kotarska, Alicja Wądołowska, Michał Sarul, Beata Kawala and Joanna Lis
J. Clin. Med. 2025, 14(1), 81; https://doi.org/10.3390/jcm14010081 - 27 Dec 2024
Viewed by 1477
Abstract
Background: Ankyloglossia is a congenital, abnormally short, thickened, or tight lingual frenulum that restricts tongue mobility, which may impair the development of the lower face morphology, namely the occlusion and skeleton. Objective: The aim of this study was to evaluate whether and how [...] Read more.
Background: Ankyloglossia is a congenital, abnormally short, thickened, or tight lingual frenulum that restricts tongue mobility, which may impair the development of the lower face morphology, namely the occlusion and skeleton. Objective: The aim of this study was to evaluate whether and how the lingual frenotomy benefits the occlusion and lower face skeleton development. Search methods and selection criteria: The authors, independently and in duplication, performed searches of PubMed, Cochrane Library, Medline, Web of Science, and Embase, introducing the following keywords: tongue tie, ankyloglossia, and short lingual frenum/frenulum, combined with malocclusion, lower face skeleton, and hyoid bone. Data collection and analysis: Relevant articles were assessed for quality according to the Cochrane guidelines and the data extracted for further analysis of the risk of bias and the evidence strength. Results: Seven articles including 1349 patients with ankyloglossia and 90 in the control group underwent the detailed analysis. The quality of the included studies was assessed as low. The strongest evidence of studies reporting the relationship of ankyloglossia with lower face abnormalities concerns the reduction in the intercanine and intermolar widths in either the maxilla or the mandible, as well as Class III occurrence. Limitations: The drawbacks of the analysed papers are mainly composition and number of participants. There is also a lack of good-quality prospective studies, particularly randomised clinical trials, in the literature. Conclusions: Although the lack of high-quality studies dictates that we must treat our results cautiously, the gathered evidence conditionally allow us to state the following: 1. ankyloglossia may be one of the factors contributing to maxillary constriction, Class III malocclusion, and mandibular incisor crowding; 2. the patient’s age is relevant when it comes to frenotomy timing. Possible indications for the procedure depend on the patient’s malocclusion. Full article
(This article belongs to the Section General Surgery)
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12 pages, 8463 KiB  
Case Report
Application of CAD-CAM 3D Technology in Designing a Molar Distalization Device with Skeletal Anchorage: A Case Report
by Martina Mezio, Alessandra Putrino, Ersilia Barbato, Stefano Pandolfi and Michele Cassetta
Dent. J. 2024, 12(12), 417; https://doi.org/10.3390/dj12120417 - 18 Dec 2024
Cited by 1 | Viewed by 1039
Abstract
Objectives: Mandibular molar distalization is a complex orthodontic movement due to anatomic and biomechanical limitations. The opportunity to use a custom-made appliance with skeletal anchorage should be an advantageous alternative to traditional solutions: multiple extractions, interproximal reductions, vestibular inclination of incisal group. Methods [...] Read more.
Objectives: Mandibular molar distalization is a complex orthodontic movement due to anatomic and biomechanical limitations. The opportunity to use a custom-made appliance with skeletal anchorage should be an advantageous alternative to traditional solutions: multiple extractions, interproximal reductions, vestibular inclination of incisal group. Methods: A 14-year-old female patient with Class II malocclusion and ectopic upper and lower canines was treated in the lower arch with a custom-made appliance anchored on a mini-screw in the right buccal-shelf where the ectopy and crowding was severe. The miniscrew was connected to a rigid arm with a rail equipped with a coil that activated promoted the distalization of first and second molars bonded with metallic bands. Results: After 8 months of treatment with activations repeated every 4 weeks, an effective distalization has been reached. Conclusions: Mandibular molars’ distalization is a challenging orthodontic result to achieve. When the need to obtain space cannot be beneficially obtained with conventional approaches, and distalization of the lower molars could be desirable, a custom distalization device with skeletal anchorage and biomechanics based on a pressed coil sliding on a rigid arm is an efficient solution. Full article
(This article belongs to the Special Issue New Trends in Digital Dentistry)
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13 pages, 5037 KiB  
Case Report
A Novel Technique for Shortening Orthodontic Treatment: The “JET System”
by Shinichi Narita, Kiyoko Narita and Masaru Yamaguchi
Medicina 2022, 58(2), 150; https://doi.org/10.3390/medicina58020150 - 19 Jan 2022
Cited by 2 | Viewed by 6388
Abstract
We have developed a novel technique, the Jiyugaoka Enjoyable Treatment (JET) system, to complete orthodontic treatment in a short time. It entails the use of the regional acceleratory phenomenon (RAP), light continuous forces and low friction in cases involving extraction. In the JET [...] Read more.
We have developed a novel technique, the Jiyugaoka Enjoyable Treatment (JET) system, to complete orthodontic treatment in a short time. It entails the use of the regional acceleratory phenomenon (RAP), light continuous forces and low friction in cases involving extraction. In the JET system, tooth extraction not only creates space, but also triggers the RAP; thus tooth extraction accelerates orthodontic treatment. We describe for the first time how to use the JET system to shorten treatment time in a patient in whom four premolars were extracted. A 15 year old girl patient exhibited an Angle Class I bimaxillary protrusion with moderate crowding in the maxillary (−5.0 mm) and mandibular arches (−3.5 mm). Her facial appearance was slightly asymmetric, and her facial profile was convex. Immediately after the simultaneous extraction of the maxillary first premolars and mandibular second premolars, orthodontic treatment was started with a combination of passive self-ligating brackets and super-elastic nickel-titanium closed coil springs that provided orthodontic forces of less than 50 gf (1.8 ozf). The appliance was adjusted once a month. The total treatment time was 13 months. Cephalometric superimpositions showed a slight anchorage loss, and panoramic radiographs showed a slight apical root resorption but no significant reduction in the crest bone height. At the 3-year 6-month retention follow-up, stability was excellent. The JET system might shorten the orthodontic treatment period without serious anchorage loss or other adverse effects. Full article
(This article belongs to the Collection New Concepts for Dental Treatments and Evaluations)
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12 pages, 2480 KiB  
Article
Comparison of Mandibular Arch Expansion by the Schwartz Appliance Using Two Activation Protocols: A Preliminary Retrospective Clinical Study
by Vincenzo Quinzi, Stefano Mummolo, Francesca Bertolazzi, Vincenzo Campanella, Giuseppe Marzo and Enrico Marchetti
J. Funct. Morphol. Kinesiol. 2020, 5(3), 61; https://doi.org/10.3390/jfmk5030061 - 6 Aug 2020
Cited by 43 | Viewed by 6405
Abstract
Background and objectives: Dental crowding is more pronounced in the mandible than in the maxilla. When exceeding a significant amount, the creation of new space is required. The mandibular expansion devices prove to be useful even if the increase in the lower arch [...] Read more.
Background and objectives: Dental crowding is more pronounced in the mandible than in the maxilla. When exceeding a significant amount, the creation of new space is required. The mandibular expansion devices prove to be useful even if the increase in the lower arch perimeter seems to be just ascribed to the vestibular inclination of teeth. The aim of the study was to compare two activation protocols of the Schwartz appliance in terms of effectiveness, particularly with regard to how quickly crowding is solved and how smaller is the increasing of vestibular inclination of the mandibular molars. Materials and Methods: We compared two groups of patients treated with different activation’s protocols of the lower Schwartz appliance (Group 1 protocol consisted in turning the expansion screw half a turn twice every two weeks and replacing the device every four months; Group 2 was treated by using the classic activation protocol—1/4 turn every week, never replacing the device). The measurements of parameters such as intercanine distance (IC), interpremolar distance (IPM), intermolar distance (IM), arch perimeter(AP), curve of Wilson (COW), and crowding (CR) were made on dental casts at the beginning and at the end of the treatment. Results: A significant difference between protocol groups was observed in the variation of COWL between time 0 and time 1 with protocol 1 with protocol 1 subjects showing a smaller increase in the parameter than protocol 2 subjects. The same trend was observed also for COWR, but the difference between protocol groups was slightly smaller and the interaction protocol-by-time did not reach the statistical significance. Finally, treatment duration in protocol 1 was significantly lower than in protocol 2. Conclusion: The results of our study suggest that the new activation protocol would seem more effective as it allows to achieve the objective of the therapy more quickly, and likely leading to greater bodily expansion. Full article
(This article belongs to the Special Issue Role of Exercises in Musculoskeletal Disorders—3th Edition)
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9 pages, 4036 KiB  
Article
Evaluation of Lower Dental Arch Crowding and Dimension after Treatment with Lip Bumper versus Schwarz Appliance. A Prospective Pilot Study
by Vincenzo Quinzi, Silvia Caruso, Stefano Mummolo, Alessandro Nota, Anna Maria Angelone, Antonella Mattei, Roberto Gatto and Giuseppe Marzo
Dent. J. 2020, 8(2), 34; https://doi.org/10.3390/dj8020034 - 10 Apr 2020
Cited by 8 | Viewed by 7345
Abstract
Aim: The treatment of patients with mixed dentition, with inferior moderate dental crowding (the so-called borderline cases, between extraction and expansion) is not yet clear. Two examples of widely used appliances for increasing lower dental arch dimensions are the Schwarz’s appliance and lip [...] Read more.
Aim: The treatment of patients with mixed dentition, with inferior moderate dental crowding (the so-called borderline cases, between extraction and expansion) is not yet clear. Two examples of widely used appliances for increasing lower dental arch dimensions are the Schwarz’s appliance and lip bumper. The aim of this prospective study was to compare dental crowding and arch dimensions from pre- to post-treatment with lip bumper versus Schwarz’s appliance. Subjects and Methods: Pre- and post-treatment orthodontic records of twenty subjects (10 males and 10 females) were analyzed in the present study. Inclusion criteria were: first/second molar class malocclusion; crowding of the mandibular arch, from mild to moderate (4–6 mm); mixed dentition; age ≤ 9 years at the beginning of the treatment; stage CS1 or CS2 of maturation of the cervical vertebrae analysis (CVM) at the beginning of the treatment. Ten subjects were treated with a lip bumper, and ten with the removable Schwarz appliance. The primary outcomes were the variations in dental crowding and arch dimensions from pre- to post-treatment. Results: Both the two appliances caused a statistically significant mean improvement/reduction in crowding, of 3.5 mm and 2.9 mm, for the Schwarz appliance and lip bumper, respectively. The Schwarz appliance resulted more effective in increasing arch dimension at the intercanine level, and arch perimeter, while the lip bumper achieves a higher increase in arch length. Conclusions: A lip bumper and Schwarz appliance are both useful in reducing crowding in mixed dentition. This improvement is due to the increase in dental arch dimensions, although the distribution of space resulted slightly differently between the two appliances. Full article
(This article belongs to the Special Issue New Frontiers in Orthodontics)
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