scholarly journals Preapplication of Orthodontic Forces to the Donor Teeth Affects Periodontal Healing of Transplanted Teeth

2008 ◽  
Vol 78 (3) ◽  
pp. 495-501 ◽  
Author(s):  
Yusuke Suzaki ◽  
Yoshiro Matsumoto ◽  
Zuisei Kanno ◽  
Kunimichi Soma
Keyword(s):  
Periodontal Ligament ◽  
Root Resorption ◽  
Root Surface ◽  
Orthodontic Force ◽  
Control Side ◽  
Before And After ◽  
Experimental Side ◽  
Orthodontic Forces ◽  
Periodontal Healing

Abstract Objective: To investigate how the preapplication of orthodontic forces to the donor teeth affects the periodontal healing after transplantation. Materials and Methods: The orthodontic force (1.5 cN) was applied to the maxillary right molars of 6-week-old male Spraque-Dawley rats (n = 21) in the experimental side, and the left side of the same animals was used as the control. After 7 days, both right and left maxillary second molars were extracted or replanted. Periodontal conditions were evaluated in the histological specimens 7 days after applying orthodontic force (before and after extraction) and 14 days after replantation. Results: The application of orthodontic force for 7 days significantly increased the periodontal ligament (PDL) space and also the width of the alveolar socket, which resulted in a rich attached PDL to the root surface of the extracted teeth. Significantly more root resorption was also detected in the control side without preapplication of orthodontic force 14 days after replantation. This root resorption might involve in the disruption of the PDL. Conclusion: These results suggested that the preapplication of orthodontic force to the donor teeth increased the PDL width and eased the extraction, which might decrease root resorption after replantation.

scholarly journals Effect of fluoride on root resorption following heavy and light orthodontic force application for 4 weeks and 12 weeks of retention

2012 ◽  
Vol 83 (3) ◽  
pp. 418-424 ◽  
Author(s):  
Ersan I. Karadeniz ◽  
Carmen Gonzales ◽  
Tamer Turk ◽  
Devrim Isci ◽  
Aynur M. Sahin-Saglam ◽  
...  
Keyword(s):  
Null Hypothesis ◽  
Root Resorption ◽  
Positive Control ◽  
Orthodontic Force ◽  
Control Side ◽  
Force Application ◽  
Fluoride Intake ◽  
High Fluoride ◽  
Experimental Side ◽  
Light Force

ABSTRACT Objective: To evaluate the null hypothesis that fluoride intake via drinking water has no effect on orthodontic root resorption in humans after orthodontic force application for 4 weeks and 12 weeks of retention. Materials and Methods: Forty-eight patients who required maxillary premolar extractions as part of their orthodontic treatment were selected from two cities in Turkey. These cities had a high and low fluoride concentration in public water of ≥2 pm and ≤0.05 pm, respectively. The patients were randomly separated into four groups of 12 each: group 1HH, high fluoride (≥2 ppm) and heavy force (225 g); group 2LH, low fluoride (≤0.05 ppm) and heavy force; group 3HL, high fluoride and light force (25 g); and group 4LL, low fluoride and light force. Light or heavy buccal tipping force was applied on the upper first premolars for 28 days. At day 28, the left premolars were extracted (positive control side); the right premolars (experimental side) were extracted after 12 weeks of retention. The samples were analyzed with microcomputed tomography. Results: On the positive control side, under heavy force application, the high fluoride groups exhibited less root resorption (P  =  .015). On the experimental side, it was found that fluoride reduced the total volume of root resorption craters; however, this effect was not statistically significant (P  =  .237). Moreover, the results revealed that under heavy force application experimental teeth exhibited more root resorption than positive control groups. Conclusion: The null hypothesis could not be rejected. High fluoride intake from public water did not have a beneficial effect on the severity of root resorption after a 4-week orthodontic force application and 12 weeks of passive retention.

scholarly journals Effect of continuous versus intermittent orthodontic forces on root resorption: A microcomputed tomography study

2018 ◽  
Vol 88 (6) ◽  
pp. 733-739 ◽  
Author(s):  
Nurhat Ozkalayci ◽  
Ersan Ilsay Karadeniz ◽  
Selma Elekdag-Turk ◽  
Tamer Turk ◽  
Lam L. Cheng ◽  
...  
Keyword(s):  
Tooth Movement ◽  
Root Resorption ◽  
Experimental Period ◽  
Microcomputed Tomography ◽  
Orthodontic Force ◽  
Rotational Movement ◽  
Force Application ◽  
Orthodontic Forces ◽  
Intermittent Regimen

ABSTRACT Objectives: To compare the extent of root resorption and the amount of tooth movement between continuous orthodontic force and intermittent orthodontic force that was activated in a similar way to a 4-week orthodontic adjustment period. Materials and Methods: Twenty-five patients who required the extraction of upper first premolars were recruited in this study. A buccally directed continuous force of 150 g was applied to the upper first premolar on one side for 15 weeks. A buccally directed intermittent force (28 days on, 7 days off) of the same magnitude was applied to the contralateral first premolar. The teeth were extracted at the end of the experimental period and processed for volumetric evaluations of resorption craters. The degree of tooth movement and rotation were measured on the study models. Results: Continuous force application displayed significantly higher root resorption volume than the intermittent force application (P < .05), particularly on the buccal and lingual surfaces (P < .05) and the middle third of the root (P < .01). There was more tipping and rotational movement in the continuous force group. Conclusions: In a 4-week orthodontic adjustment period, intermittent force significantly reduced the amount of root resorption compared with continuous force. Although there was less degree of tooth movement with intermittent force, unwanted rotational movement was avoided. This is crucial in patients who are predisposed to orthodontically induced inflammatory root resorption, and the use of this intermittent regimen should be considered.

Root surface microcracks induced by orthodontic force as a potential primary indicator of root resorption

2020 ◽  
Vol 110 ◽  
pp. 109938 ◽  
Author(s):  
Shengzhao Xiao ◽  
Linhao Li ◽  
Lizhen Wang ◽  
Yawei Wang ◽  
Mingzheng Zhang ◽  
...  
Keyword(s):  
Root Resorption ◽  
Root Surface ◽  
Orthodontic Force

scholarly journals In vivo effects of different orthodontic loading on root resorption and correlation with mechanobiological stimulus in periodontal ligament

2019 ◽  
Vol 16 (154) ◽  
pp. 20190108 ◽  
Author(s):  
Jingxiao Zhong ◽  
Junning Chen ◽  
Richard Weinkamer ◽  
M. Ali Darendeliler ◽  
Michael V. Swain ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Periodontal Ligament ◽  
Root Resorption ◽  
Imaging Techniques ◽  
Common Side Effect ◽  
Element Analysis ◽  
Clinical Observations ◽  
Microct Imaging ◽  
Orthodontic Forces

Orthodontic root resorption is a common side effect of orthodontic therapy. It has been shown that high hydrostatic pressure in the periodontal ligament (PDL) generated by orthodontic forces will trigger recruitment of odontoclasts, leaving resorption craters on root surfaces. The patterns of resorption craters are the traces of odontoclast activity. This study aimed to investigate resorptive patterns by: (i) quantifying spatial root resorption under two different levels of in vivo orthodontic loadings using microCT imaging techniques and (ii) correlating the spatial distribution pattern of resorption craters with the induced mechanobiological stimulus field in PDL through nonlinear finite-element analysis (FEA) in silico . Results indicated that the heavy force led to a larger total resorption volume than the light force, mainly by presenting greater individual crater volumes ( p < 0.001) than increasing crater numbers, suggesting that increased mechano-stimulus predominantly boosted cellular resorption activity rather than recruiting more odontoclasts. Furthermore, buccal–cervical and lingual–apical regions in both groups were found to have significantly larger resorption volumes than other regions ( p < 0.005). These clinical observations are complemented by the FEA results, suggesting that root resorption was more likely to occur when the volume average compressive hydrostatic pressure exceeded the capillary blood pressure (4.7 kPa).

scholarly journals Effect of Low Intensity Pulsed Ultrasound (LIPUS) on Tooth Movement and Root Resorption: A Prospective Multi-Center Randomized Controlled Trial

2020 ◽  
Vol 9 (3) ◽  
pp. 804 ◽  
Author(s):  
Tarek El-Bialy ◽  
Khaled Farouk ◽  
Terry D. Carlyle ◽  
William Wiltshire ◽  
Robert Drummond ◽  
...  
Keyword(s):  
Tooth Movement ◽  
Root Resorption ◽  
Controlled Trial ◽  
Control Group ◽  
Pulsed Ultrasound ◽  
Low Intensity Pulsed Ultrasound ◽  
Low Intensity ◽  
Control Side ◽  
Before And After ◽  
Group 1

The aim of this study was to evaluate the possible effect of low intensity pulsed ultrasound (LIPUS) on tooth movement and root resorption in orthodontic patients. Twenty-one patients were included in a split-mouth study design (group 1). Ten additional patients were included with no LIPUS device being used and this group was used as the negative control group (group 2). Group 1 patients were given LIPUS devices that were randomly assigned to right or left side on upper or lower arches. LIPUS was applied to the assigned side that was obtained by randomization, using transducers that produce ultrasound with a pulse frequency of 1.5 MHz, a pulse repetition rate of 1 kHz, and average output intensity of 30 mW/cm2. Cone-beam computed tomography (CBCT) images were taken before and after treatment. The extraction space dimensions were measured every four weeks and root lengths of canines were measured before and after treatment. The data were analyzed using paired t-test. The study outcome showed that the mean rate of tooth movement in LIPUS side was 0.266 ± 0.092 mm/week and on the control side was 0.232 ± 0.085 mm/week and the difference was statistically significant. LIPUS increased the rate of tooth movement by an average of 29%. For orthodontic root resorption, the LIPUS side (0.0092 ± 0.022 mm/week) showed a statistically significant decrease as compared to control side (0.0223 ± 0.022 mm/week). The LIPUS application accelerated tooth movement and minimized orthodontically induced tooth root resorption at the same time.

scholarly journals NATURAL MEDIA VS ARTIFICIAL MEDIA FOR PRESERVATION OF AVULSED TOOTH.-Original Reaserch

2019 ◽  
Author(s):  
MANOJ KALLURI ◽  
TEJASWINI GUDURU
Keyword(s):  
Periodontal Ligament ◽  
Root Resorption ◽  
Culture Media ◽  
Tap Water ◽  
Root Surface ◽  
Pomegranate Juice ◽  
Periodontal Ligament Cells ◽  
Pulp Tissue ◽  
Storage Media ◽  
Contact Lens Solution

Dental avulsion may be defined as the displacement of the tooth from its socket as a result of trauma. The best possible treatment for an avulsed tooth is replanting it immediately (i.e., less than five minutes). Unfortunately, and most of the times avulsed teeth experience delayed replantation. The success of delayed replantation depends on the vitality of the periodontal ligament cells remaining on the root surface. The chances of root surface damage are higher when tooth replantation is not performed immediately or if the avulsed tooth is not stored in an adequate storage medium. This invariably leads to necrosis of pulp tissue, periodontal ligament cells and thus increasing the possibility of root resorption, which is the main cause of loss of replanted teeth. Isotonic medium is superior to dry storage in the storage of avulsed tooth. Natural storage media are tap water, milk, saline, saliva, coconut water, egg white, propolis extract, green tea extract, aloe vera, pomegranate juice, red mulberry etc. Synthetic storage media are Gatorade, contact lens solution, HBSS, viaspan, emdogain, culture media etc. In this article, we are going to discuss the most suitable media for interim storage of the avulsed tooth by comparing the natural and synthetic storage media. KeyWords: preservative, media, avulsed teeth, Dental tissue

scholarly journals Immunolocalization of FGF-2 and VEGF in rat periodontal ligament during experimental tooth movement

2014 ◽  
Vol 19 (3) ◽  
pp. 67-74 ◽  
Author(s):  
Milene Freitas Lima Salomão ◽  
Sílvia Regina de Almeida Reis ◽  
Vera Lúcia Costa Vale ◽  
Cintia de Vasconcellos Machado ◽  
Roberto Meyer ◽  
...  
Keyword(s):  
Growth Factor ◽  
Periodontal Ligament ◽  
Tooth Movement ◽  
Orthodontic Tooth Movement ◽  
Periodontal Tissue ◽  
Group Iii ◽  
Group I ◽  
Male Wistar Rats ◽  
Experimental Side ◽  
Orthodontic Forces

OBJECTIVE: This article aimed at identifying the expression of fibroblast growth factor-2 (FGF-2) and vascular endothelial growth factor (VEGF) in the tension and pressure areas of rat periodontal ligament, in different periods of experimental orthodontic tooth movement. METHODS: An orthodontic force of 0.5 N was applied to the upper right first molar of 18 male Wistar rats for periods of 3 (group I), 7 (group II) and 14 days (group III). The counter-side first molar was used as a control. The animals were euthanized at the aforementioned time periods, and their maxillary bone was removed and fixed. After demineralization, the specimens were histologically processed and embedded in paraffin. FGF-2 and VEGF expressions were studied through immunohistochemistry and morphological analysis. RESULTS: The experimental side showed a higher expression of both FGF-2 and VEGF in all groups, when compared with the control side (P < 0.05). Statistically significant differences were also found between the tension and pressure areas in the experimental side. CONCLUSION: Both FGF-2 and VEGF are expressed in rat periodontal tissue. Additionally, these growth factors are upregulated when orthodontic forces are applied, thereby suggesting that they play an important role in changes that occur in periodontal tissue during orthodontic movement.

scholarly journals The effect of propolis solution on root surface treatment in replanted teeth

2015 ◽  
Vol 18 (3) ◽  
pp. 90
Author(s):  
Beatriz Farias Vogt ◽  
Roberta Dalmolin Bergoli ◽  
Carlos Eduardo Chrzanowski Pereira De Souza ◽  
Natália Marreco Weigert ◽  
Stela Maris Wanderley Nobre ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Sodium Fluoride ◽  
Periodontal Ligament ◽  
Tissue Repair ◽  
Root Resorption ◽  
Healing Process ◽  
Root Surface ◽  
Male Rats ◽  
Root Canals ◽  
Mechanical Removal

<strong>Objective: </strong>The objective of this study was to assess the effect of propolis solution on root surface treatment in cases of delayed tooth replantation following chemical or mechanical removal of the periodontal ligament. <strong>Material and methods:</strong> Maxillary right central incisors of 36 male rats (Wistar) were extracted, kept in a dry environment for 15 minutes and then distributed into six groups, as follows: mechanical-propolis and mechanical-fluoride (mechanical removal followed by immersion in 6% propolis and 2% sodium fluoride, respectively), mechanical (mechanical removal only), chemical-propolis and chemical-fluoride (chemical removal followed byimmersion in 6% propolis and 2% sodium fluoride, respectively), and chemical (chemical removal only). Following periodontal ligament removal, root canals were filled with calcium hydroxide paste and replanted. After 60 days, histological analysis with light microscopy was carried out to detect areas of dentoalveolar ankylosis and root resorption. <strong>Results:</strong> Results revealed that chemical removal of the periodontal ligament was associated with slightly better tissue repair findings when compared with mechanical removal. <strong>Conclusions:</strong> The use of 6% propolis solution encouraged tissue repair, while the 2% sodium fluoride solution combined with chemical removal resulted in a better-organized healing process, with less destruction of dentine when compared with the 6% propolis solution.

scholarly journals Respuesta del ligamento periodontal a la avulsión dental. Reporte de caso / Periodontal Ligament Response to Dental Avulsion. Case Report

2017 ◽  
Vol 35 (75) ◽  
Author(s):  
Raúl Solórzano Santos ◽  
Antonio José Díaz-Caballero ◽  
Eduardo Covo Morales
Keyword(s):  
Case Report ◽  
Periodontal Ligament ◽  
Root Resorption ◽  
Root Surface ◽  
Permanent Teeth ◽  
Traumatic Lesion ◽  
External Root Resorption ◽  
Type K ◽  
Dental Avulsion

RESUMEN. Antecedentes: La avulsión es un tipo de lesión traumática poco frecuente en la dentición permanente. La reabsorción radicular externa es un evento común posterior al reimplante de un diente avulsionado. Objetivo: Reportar un caso de trauma de dos dientes reimplantados, en el que se obtuvieron resultados satisfactorios con 26 semanas de seguimiento. Reporte del caso: Manejo clínico de paciente de sexo masculino de 8 años de edad que se presenta a la clínica del Postgrado de Endodoncia de la Universidad de Cartagena, Colombia, con antecedente de avulsión y posterior reimplante con ferulización de los dos incisivos centrales superiores. Los dientes fueron preparados hasta lima 50 tipo K, medicados con hidróxido de calcio y obturados con MTA. Resultados: Se observó cicatrización de la superficie radicular con disminución de las zonas de reabsorción externa radicular después de 26 semanas de seguimiento. Conclusión: La reabsorción radicular externa en dientes avulsionados reimplantados puede contrarrestarse en la medida que hayan sido manejados con conocimiento profesional, dentro de un marco de tiempo y condiciones biológicas.  ABSTRACT. Background: Dental avulsion is a rare traumatic lesion in permanent teeth. External root resorption is a common event after reimplantation of an avulsed tooth. Purpose: To report a case of two reimplanted teeth with satisfactory results after controls during 26 weeks. Case report: Clinical management of an 8-year-old boy that seeks attention in the clinic of the Postdoctoral Program in Endodontics of University of Cartagena with background of avulsion of both central upper incisors. The teeth were prepared up to a type K # 50 file, medicated with calcium hydroxide and later filled with MTA. Results: Healing was observed on the root surface with reduction of the external radicular resorption after a 26-week follow-up. Conclusion: External radicular resorption can be counteracted as long as its handling was performed professionally within parameters of time and biological conditions.   

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