Comparison of mandibular arch expansion by the schwartz appliance using two activation protocols: A preliminary retrospective clinical study
| Autor: | Stefano Mummolo, Giuseppe Marzo, Vincenzo Quinzi, Enrico Marchetti, Vincenzo Campanella, Francesca Bertolazzi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Molar
Histology Every Two Weeks lcsh:Diseases of the musculoskeletal system Mandibular arch expansion Physical Therapy Sports Therapy and Rehabilitation tooth size-arch length discrepancy Tooth size-arch length discrepancy Article Settore MED/28 Perimeter 03 medical and health sciences 0302 clinical medicine Rheumatology stomatognathic system Statistical significance Medicine Orthopedics and Sports Medicine Early interceptive orthodontic treatment Mandibular crowding reduction 030304 developmental biology Schwartz appliance Orthodontics 0303 health sciences business.industry Mandible 030206 dentistry early interceptive orthodontic treatment mandibular arch expansion mandibular crowding reduction schwartz appliance Crowding Dental crowding stomatognathic diseases Maxilla Anatomy lcsh:RC925-935 business |
| Zdroj: | Journal of Functional Morphology and Kinesiology, Vol 5, Iss 61, Pp 61-0 (2020) Journal of Functional Morphology and Kinesiology Volume 5 Issue 3 Pages 61-0 |
| Popis: | 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&rsquo 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&mdash 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. |
| Databáze: | OpenAIRE |
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