Nicola Beindorff, Nikolaos Papadopoulos, Stefan Hoffmann, Ajay-Mohan Mohan, Mathias Lukas, Winfried Brenner, Paul-Georg Jost-Brinkmann, Thomas Präger
{"title":"Monitoring orthodontic tooth movement in rats after piezocision by bone scintigraphy.","authors":"Nicola Beindorff, Nikolaos Papadopoulos, Stefan Hoffmann, Ajay-Mohan Mohan, Mathias Lukas, Winfried Brenner, Paul-Georg Jost-Brinkmann, Thomas Präger","doi":"10.1055/a-1816-6825","DOIUrl":null,"url":null,"abstract":"<p><strong>Aim: </strong>Piezocision, corticocision of mineralized tissue by ultrasound showed promising results in accelerating tooth movement induced by orthodontic appliances although the biologic effects of this procedure are not well-understood so far. The aim of this study was to investigate the impact of piezocision on bone remodeling in rats by bone SPECT imaging.</p><p><strong>Material and methods: </strong>Ten male Wistar rats underwent surgical placement of orthodontic appliances on each side of the maxilla followed by piezocision on one side only. Each rat underwent <sup>99m</sup>Tc-MDP bone SPECT/CT imaging before surgery (T0), and 2 (T1) and 4 weeks (T2) after surgery. Bone uptake is expressed as median [IQR] min-max in percentage of the injected activity per ml computed from the 10 voxels with the highest uptake (%IAmax10/ml).</p><p><strong>Results: </strong>Pooled data regardless of the piezocision showed a significant increase in bone uptake from T0 (3.2 [2.8-3.9] 2.6-4.9) to T1 (4.4 [3.8-4.6] 3.4-4.8; p = 0.001). Thereafter, the uptake decreased to T2 (3.8 [3.1-4.4] 2.8-4.8; p = 0.116). No significant differences in bone uptake were found between the maxilla sides without and with piezocision: T1: without (4.3 [3.8-4.5] 3.4-4.8) vs. with (4.5 [3.7-4.6] 3.5-4.7; p=0.285), T2: without (4.0 [3.1-4.5] 2.8-4.8) vs. with (3.7 [3.0-4.4] 2.8-4.8; p=0.062).</p><p><strong>Conclusion: </strong><sup>99m</sup>Tc-MDP bone SPECT imaging in rats was able to reproduce changes in bone uptake in the maxilla after placement of orthodontic appliances inducing measurable tooth movement. An additional effect of piezocision on bone remodeling in terms of bone uptake was not detectable which is probably due to the pronounced and significant effects induced by the orthodontic appliances per se, which may mask the potential effects of additional piezocision.</p>","PeriodicalId":19238,"journal":{"name":"Nuklearmedizin-nuclear Medicine","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuklearmedizin-nuclear Medicine","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1055/a-1816-6825","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2022/7/27 0:00:00","PubModel":"Epub","JCR":"Q4","JCRName":"RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING","Score":null,"Total":0}
引用次数: 0
Abstract
Aim: Piezocision, corticocision of mineralized tissue by ultrasound showed promising results in accelerating tooth movement induced by orthodontic appliances although the biologic effects of this procedure are not well-understood so far. The aim of this study was to investigate the impact of piezocision on bone remodeling in rats by bone SPECT imaging.
Material and methods: Ten male Wistar rats underwent surgical placement of orthodontic appliances on each side of the maxilla followed by piezocision on one side only. Each rat underwent 99mTc-MDP bone SPECT/CT imaging before surgery (T0), and 2 (T1) and 4 weeks (T2) after surgery. Bone uptake is expressed as median [IQR] min-max in percentage of the injected activity per ml computed from the 10 voxels with the highest uptake (%IAmax10/ml).
Results: Pooled data regardless of the piezocision showed a significant increase in bone uptake from T0 (3.2 [2.8-3.9] 2.6-4.9) to T1 (4.4 [3.8-4.6] 3.4-4.8; p = 0.001). Thereafter, the uptake decreased to T2 (3.8 [3.1-4.4] 2.8-4.8; p = 0.116). No significant differences in bone uptake were found between the maxilla sides without and with piezocision: T1: without (4.3 [3.8-4.5] 3.4-4.8) vs. with (4.5 [3.7-4.6] 3.5-4.7; p=0.285), T2: without (4.0 [3.1-4.5] 2.8-4.8) vs. with (3.7 [3.0-4.4] 2.8-4.8; p=0.062).
Conclusion: 99mTc-MDP bone SPECT imaging in rats was able to reproduce changes in bone uptake in the maxilla after placement of orthodontic appliances inducing measurable tooth movement. An additional effect of piezocision on bone remodeling in terms of bone uptake was not detectable which is probably due to the pronounced and significant effects induced by the orthodontic appliances per se, which may mask the potential effects of additional piezocision.
期刊介绍:
Als Standes- und Fachorgan (Organ von Deutscher Gesellschaft für Nuklearmedizin (DGN), Österreichischer Gesellschaft für Nuklearmedizin und Molekulare Bildgebung (ÖGN), Schweizerischer Gesellschaft für Nuklearmedizin (SGNM, SSNM)) von hohem wissenschaftlichen Anspruch befasst sich die CME-zertifizierte Nuklearmedizin/ NuclearMedicine mit Diagnostik und Therapie in der Nuklearmedizin und dem Strahlenschutz: Originalien, Übersichtsarbeiten, Referate und Kongressberichte stellen aktuelle Themen der Diagnose und Therapie dar.
Ausführliche Berichte aus den DGN-Arbeitskreisen, Nachrichten aus Forschung und Industrie sowie Beschreibungen innovativer technischer Geräte, Einrichtungen und Systeme runden das Konzept ab.
Die Abstracts der Jahrestagungen dreier europäischer Fachgesellschaften sind Bestandteil der Kongressausgaben.
Nuklearmedizin erscheint regelmäßig mit sechs Ausgaben pro Jahr und richtet sich vor allem an Nuklearmediziner, Radiologen, Strahlentherapeuten, Medizinphysiker und Radiopharmazeuten.