Document Details

Document Type : Thesis 
Document Title :
The Effect of Corticotomy in En-masse Retraction: A Randomized Clinical Trial
تأثير تخريم العظم القشري في ارجاع الاسنان الكلي: تجربه سريريه عشوائية
 
Subject : Faculty of Dentistry 
Document Language : Arabic 
Abstract : Background: Piezocision corticotomy (PC) is a technique introduced in 2009 that aims to accelerate orthodontic tooth movement. However, the effectiveness of this technique has not been studied using cone beam computed tomography (CBCT) in extraction cases with en-masse retraction. Objectives: The aims of this randomized clinical trial were to assess the effectiveness of PC on en-masse retraction by: 1) comparing the amount of en-masse retraction with and without PC; 2) assessing the type of movement (whether bodily or tipping); 3) evaluating apical root resorption; and 4) assessing the pain during and after the PC. Methods: Twenty-three orthodontic patients requiring premolar extraction were recruited and randomly divided into equal groups: piezocision corticotomy group (PCG) or the control group (CG). After leveling and aligning, using a modified bidimensional bracket system, the maxillary first premolars were extracted, and en-masse retraction was performed using a closed NiTi coil (250 g of bilateral force) attached to mini-screws. The PC procedure was performed during the extraction appointment in the PCG. The rate, amount, and type of retraction were recorded and assessed using CBCT after 4 months from the start of en-masse retraction. Pain was assessed using a numerical rating scale during and after PC and extraction Results: The en-masse retraction was significantly faster in the PCG (mean = 4.8±0.57mm) compared to that in the CG (mean = 2.4±0.33mm), with significantly less tipping (p < 0.001). Although pain was significantly higher in the CG initially, it was similar between the two groups after 24 hours and the root resorption showed no difference between the PCG and the CG. Conclusion: En-masse retraction combined with piezocision corticotomy is an effective treatment technique that requires less time for en-mass retraction and has decreased root resorption in adults. 
Supervisor : Prof. Ali Habiballah Hassan 
Thesis Type : Master Thesis 
Publishing Year : 1440 AH
2019 AD 
Co-Supervisor : Dr. Talal Mansoor Zahid 
Added Date : Wednesday, June 19, 2019 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
عبد الكريم علي حطرومHatrom, Abdulkarim AliResearcherMaster 

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