scholarly journals Accuracy of a Method to Monitor Root Position Using 3D Digital Crown/root Model During Orthodontic Treatments

2021 ◽  
Author(s):  
Kaho Ogawa ◽  
Yoshiki Ishida ◽  
Yukinori Kuwajima ◽  
Cliff Lee ◽  
Jacob R Emge ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Extrusion Direction ◽  
Test Method ◽  
Dental Arch ◽  
Strong Positive Correlation ◽  
Displacement Mapping ◽  
Crown Root ◽  
Retrospective Clinical Study ◽  
Root Model ◽  
Root Position

Abstract Objectives.The objective of this retrospective clinical study was to assess the accuracy of a method of predicting post-movement root position during orthodontic treatment, using a 3D digital crown/root model (3DCRM), which was created with pre-movement records of both CBCT and dental-arch digital scans.Material & Methods.Pre-movement CBCT scans, post-movement CBCT scans, and dental-arch digital scans of five patients who had completed orthodontic treatments were used in this study with the approval of internal review board of Iwate Medical University. The 3DCRM was superimposed onto post-movement scanned dental-arch to identify the post-movement root position (test method). Post-movement CBCT (referenced as current method) served as the control used to identify the actual post-movement root position. The predicted root positions by the two methods were compared using color displacement mapping and 3D coordinate XYZ analysis.Results.Color displacement mapping showed that the average root displacement of five cases was -0.16 mm ±0.05 mm. 3D coordinate analysis revealed no significant differences between test and current methods in X and Y axis. However, the discrepancy in Z axis (especially in cases of intrusion) was greater than all other directions (mesial, distal, labial, palatal and extrusion direction) for all three tooth types examined (central incisor, lateral incisor and canine, p <0.05). A strong positive correlation between the degree of discrepancy and the distance of tooth movement was observed on the Z axis (r =0.71).Conclusions.The 3DCRM method showed promising potential to accurately predict root position during orthodontic treatments without the need for a second CBCT. However, root resorption, which affected the Z axis prediction, needs to be closely monitored using periapical radiographs to complement this method.Clinical Relevance.The 3DCRM method can be a useful tool to better evaluate root positioning during and after orthodontic treatment without the need to expose patients to an additional CBCT scan.

Management of Patient with Aggressive Periodontitis by Orthodontic and Prosthodontic Collaboration

DENTA ◽  
2017 ◽  
Vol 11 (1) ◽  
pp. 80
Author(s):  
Chaterina Diyah Nanik K ◽  
Anindita Apsari
Keyword(s):  
Orthodontic Treatment ◽  
Young Patients ◽  
Interdisciplinary Approach ◽  
Aggressive Periodontitis ◽  
Definitive Treatment ◽  
Dental Arch ◽  
Preliminary Treatment ◽  
Young Adult Patient ◽  
Anterior Teeth ◽  
Long Span Bridge

<p><strong><em>Background:</em></strong><em> One of the most common inflammation disease in the oral cavity for the past few years is the aggressive form of periodontitis. Common signs of aggressive periodontitis is the mobility of teeth especially in incisive and first molars, and occuring mostly in young patient. Young patients whose losing her anterior teeth, are a real challenge for dentist and prosthodontist. Prosthodontist need to consider both functional and esthetic aspects. <strong>Objective:</strong> Rehabilitation of young adult patient with aggressive periodontitis by an interdisciplinary approach of orthodontist and prosthodontist. <strong>Case Description:</strong> A young woman, suffered from aggressive periodontitis with major complain of her teeth mobility, especially incisive and first molar in mandible. She had undergone periodontal treatment, but the result was failed. The anterior teeth in mandible need to be extracted, therefore patient wished not to be in edentulous state. As preliminary treatment, we choose immediate denture to replace the anterior mandible teeth. We faced difficulties in mandible, because her right canine weren’t in the proper dental arch. So we asked orthodontist to place fixed orthodontics in mandible, to get the canine back in the proper arch. We’ve chosen orthodontic treatment,because we didn’t want to extract the canine teeth. We evaluated in six months and after the canine back in the proper arch, we proceed to long span bridge in mandible as our definitive treatment. <strong>Conclusion:</strong> By not extracting the canine teeth, we got some advantages, especially patient psychically was happier with her own teeth. The collaboration with another dentistry field, provides us better treatment for patient. After treatment, patient had no complaints and was happy with her new smile.</em></p><p><strong><em>Keywords:</em></strong><em>  Prosthodontic rehabilitation, aggressive periodontitis, orthodontic treatment, esthetic</em><em>.</em></p><strong><em>Correspondence:</em></strong><em> Chaterina Diyah Nanik. K; Department of Prostodontitics, Faculty of Dentistry, Hang Tuah University, Arif Rahman Hakim 150, Surabaya; Phone 031-5912191, Email: </em><a href="mailto:[email protected]"><em>[email protected]</em></a>

OPTIMIZATION OF SURGICAL-ORTHODONTIC TREATMENT TACTICS IN PATIENTS WITH IMPACTED TEETH

2019 ◽  
Vol 72 (5) ◽  
pp. 838-845
Author(s):  
Pavlo I. Tkachenko ◽  
Maryna I. Dmytrenko ◽  
Mykola O. Cholovskyi
Keyword(s):  
Orthodontic Treatment ◽  
Objective Assessment ◽  
Optimal Path ◽  
Reference Points ◽  
Permanent Teeth ◽  
Diagnostic Process ◽  
Specific Reference ◽  
Dental Arch ◽  
Impacted Tooth ◽  
Impacted Teeth

Introduction: Impacted teeth is complex anomaly of teeth eruption that requires a balanced approach not only in the differential diagnosis of its forms, but choice of rational methods of treatment. The aim: Optimization of the tactics of orthodontic-surgical treatment of patients with impacted teeth based on the development and implementation of computed tomographic indices (KT) and photometric indices (FM) of opening of surgical access (OSA) to crowns of impacted teeth Materials and methods: The results of treatment of 48 patients with delay of permanent teeth eruption have been analyzed. For an objective assessment of treatment results, a group of 24 (aged from 9 to 19 years old ) was formed. All 24 patients had typical clinical situation. Results: Orthodontic correction of patients envisaged, first of all, the elimination of obstacles in the way of teeth eruption, if necessary to provide space in dental arch and simultaneous treatment of associated bite malocclusions. Surgical exposure of impacted tooth crown was carried out and at the same time a triangular shaped guiding channel was formed, base of channel was at the impacted tooth and its angle finished into the dental arch. Precise dimensions and depth of the channel were preliminary planed on computed tomography slices with 3D reconstruction. Mean values of CT width (7,13±0,54mm), and length (6,42±0,78mm) of OSA and CT index (130,79±8,19%) of OSA to impacted teeth crowns were determined. Conclusion: To improve the quality of diagnosis and optimization of methodological approaches to treatment of patients with teeth impaction, we have proposed CT and FM OSA indices to the crowns of impacted teeth. The developed indices serve as specific reference points for optimization of diagnostic process, for reducing of probability of repeated surgical interventions and choosing the optimal path for instrumental orthodontic treatment of patients with impacted teeth

scholarly journals Morphological changes of the anterior alveolar bone due to retraction of anterior teeth: a retrospective study

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Qiannan Sun ◽  
Wenhsuan Lu ◽  
Yunfan Zhang ◽  
Liying Peng ◽  
Si Chen ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Alveolar Bone ◽  
Morphological Changes ◽  
Strong Positive Correlation ◽  
Anterior Teeth ◽  
Bone Width ◽  
Lateral Cephalograms ◽  
Labial Side ◽  
Incisor Retraction ◽  
Maxilla And Mandible

Abstract Backgroud To analyze the morphological changes of the anterior alveolar bone after the retraction of incisors in premolar extraction cases and the relationship between incisor retraction and remodeling of the alveolar base represented by points A and B displacements. Methods Pre- (T0) and post-treatment (T1) lateral cephalograms of 308 subjects in the maxilla and 154 subjects in the mandible who underwent the orthodontic treatment with extraction of 2 premolars in upper or lower arches were included. Alveolar bone width and height in both the maxillary and mandible incisor area were measured at T0 and T1 respectively. By superimposing the T0 and T1 cephalometric tracings, changes of points A and B, and the movement of the incisors were also measured. Then the correlation between incisor movement and the displacements of points A and B was analyzed. Results The alveolar bone width (ABW) showed a significant decrease in both maxilla and mandible (P < 0.001) except the labial side of the mandible (P > 0.05). The alveolar bone height (ABH) showed a significant increase in the labial side of maxilla and a significant decrease in the lingual side of maxilla and mandible. A strong positive correlation was verified between incisor movement and position changes of points A and B in both horizontal and vertical directions. Conclusions Anterior alveolar bone width and height generally decreased after orthodontic treatment. Incisor retraction led to significant position changes of points A and B. The decrease of anterior alveolar bone due to significant incisor retraction should be taken into account in treatment planning.

scholarly journals Clinical Evaluation of Bracket Bonding Using Two Different Polymerization Sources

2008 ◽  
Vol 78 (5) ◽  
pp. 922-925 ◽  
Author(s):  
Nikolaos S. Koupis ◽  
Theodore Eliades ◽  
Athanasios E. Athanasiou
Keyword(s):  
Failure Rate ◽  
Orthodontic Treatment ◽  
Light Emitting Diode ◽  
Rank Test ◽  
Dental Arch ◽  
Halogen Lamp ◽  
Failure Rates ◽  
Bond Failure ◽  
Significant Difference ◽  
The Right

Abstract Objective: To comparatively assess clinical failure rate of brackets cured with two different photopolymerization sources after nine months of orthodontic treatment. Materials and Methods: The sample of this study comprised 30 patients who received comprehensive orthodontic treatment by means of fixed appliances. Using the same adhesive, 600 stainless steel brackets were directly bonded and light cured for 10 seconds with the light-emitting diode (LED) lamp or for 20 seconds with the conventional halogen lamp. A split-mouth design randomly alternated from patient to patient was applied. Failure rates were recorded for nine months and analyzed with Pearson χ2 test, and log-rank test at α = .05 level of significance. Results: The overall failure rate recorded with the halogen unit (3.33%) was not significantly different from the failure rate for the LED lamp (5.00%). Significantly more failures were found in boys compared with girls, in the mandibular dental arch compared with the maxillary arch, and in posterior segments compared with anterior segments. However, no significant difference was found between the right and left segments. Conclusion: Both light-curing units showed sufficiently low bond failure rates. LED curing units are an advantageous alternative to conventional halogen sources in orthodontics because they enable a reduced chair-time bonding procedure without significantly affecting bond failure rate.

scholarly journals Prevalence of Cross Bite Among the Orthodontic Patients in Bangabandhu Sheikh Mujib Medical University

2015 ◽  
Vol 26 (1) ◽  
pp. 9-12
Author(s):  
Naznin Sultana ◽  
Gazi Shamim Hassan ◽  
Digamber Jha ◽  
Towhida Nashrin ◽  
Lutfun Nahar ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Class I ◽  
Dental Arch ◽  
Diagnostic Model ◽  
Class Iii ◽  
Posterior Crossbite ◽  
Orthodontic Patients ◽  
Medical University ◽  
Functional Components ◽  
Congenitally Missing

Crossbite is one of the most prevalent malocclusion, posterior crossbite occurs in 8% to 22% of orthodontic cases and anterior crossbite has been seen in Class III cases, which accounts for 3.4% of orthodontic cases. The etiology of posterior crossbite can include any combination of dental, skeletal, and neuro muscular functional components, but the most frequent cause is reduction in width of the maxillary dental arch. Patients/cases seeking comprehensive orthodontic treatment in between 5 to 35 years were diagnosed for crossbite with diagnostic model and care record file. Out of 300 cases 163(54.3%) had crossbite, 90(30%) had anterior crossbite and 109(36.3%) had posterior cross bite. Among posterior crossbite 60(20%) had unilateral and 49(16.3%) had bilateral crossbite. Posterior crossbite was more prevalent than anterior crossbite. Cases with Class I molar relation showed more crossbite. Crossbite was more prevalent in cases with congenitally missing teeth.Bangladesh J Medicine Jan 2015; 26 (1) : 9-12

scholarly journals Predisposing factors to severe external root resorption associated to orthodontic treatment

2013 ◽  
Vol 18 (1) ◽  
pp. 110-120 ◽  
Author(s):  
Gracemia Vasconcelos Picanço ◽  
Karina Maria Salvatore de Freitas ◽  
Rodrigo Hermont Cançado ◽  
Fabricio Pinelli Valarelli ◽  
Paulo Roberto Barroso Picanço ◽  
...  
Keyword(s):  
Root Length ◽  
Orthodontic Treatment ◽  
Alveolar Bone ◽  
Root Resorption ◽  
Treatment Time ◽  
Predisposing Factors ◽  
Crown Root ◽  
External Root Resorption ◽  
Lateral Cephalograms ◽  
Maxillary Incisors

OBJECTIVE: The aim of this study was to evaluate predisposing factors among patients who developed moderate or severe external root resorption (Malmgren's grades 3 and 4), on the maxillary incisors, during fixed orthodontic treatment in the permanent dentition. METHODS: Ninety-nine patients who underwent orthodontic treatment with fixed edgewise appliances were selected. Patients were divided into two groups: G1 - 50 patients with no root resorption or presenting only apical irregularities (Malmgren's grades 0 and 1) at the end of the treatment, with mean initial age of 16.79 years and mean treatment time of 3.21 years; G2 - 49 patients presenting moderate or severe root resorption (Malmgren's grades 3 and 4) at the end of treatment on the maxillary incisors, with mean initial age of 19.92 years and mean treatment time of 3.98 years. Periapical radiographs and lateral cephalograms were evaluated. Factors that could influence the occurrence of severe root resorption were also recorded. Statistical analysis included chi-square tests, Fisher's exact test and independent t tests. RESULTS: The results demonstrated significant difference between the groups for the variables: Extractions, initial degree of root resorption, root length and crown/root ratio at the beginning, and cortical thickness of the alveolar bone. CONCLUSION: It can be concluded that: Presence of root resorption before the beginning of treatment, extractions, reduced root length, decreased crown/root ratio and thin alveolar bone represent risk factors for severe root resorption in maxillary incisors during orthodontic treatment.

scholarly journals Enigma of Fixed Retainers

2018 ◽  
Vol 7 (2) ◽  
pp. 52-55
Author(s):  
Jijo C Eapen ◽  
Amit Prakash
Keyword(s):  
Orthodontic Treatment ◽  
Treatment Result ◽  
Dental Arch ◽  
Careful Evaluation ◽  
Retention Period ◽  
Treatment Situation ◽  
Patient Cooperation ◽  
Time Required ◽  
Fixed Retainers ◽  
Arch Shape

Fixed retainers are a reliable form of retention for avoiding relapse and maintaining dental arch shape. They function regardless of patient cooperation, and they fulfill high esthetic expectations. Teeth have tendency to return to their former position, as time required for retaining the treatment result. The most appropriate mode of retention for the post-treatment situation should be used, based on a careful evaluation of the patient’s pretreatment diagnostic records, habits, cooperation, growth pattern, and age. Retention after orthodontic intervention is as important part of the therapy as the active treatment. Age and maturity of the patients, result of the orthodontic intervention, origin and character of the anomaly, type of the retainer, compliance of the patients; all can influence the chance of relapse. The retention period should be twice longer than the active orthodontic treatment. This article covers various aspect of fixed retention in detail

Multidisciplinary Approach for Treating Malocclusion of Patient With Basal Cell Nevus Syndrome: A Case Report

2019 ◽  
Vol 57 (2) ◽  
pp. 255-262
Author(s):  
Sayuri Inoue ◽  
Hiroshi Kurosaka ◽  
Donghoon Lee ◽  
Takashi Yamashiro
Keyword(s):  
Basal Cell ◽  
Orthodontic Treatment ◽  
Cleft Lip ◽  
Multidisciplinary Approach ◽  
Genetic Disorder ◽  
Dental Arch ◽  
Class Iii ◽  
Basal Cell Nevus Syndrome ◽  
Skeletal Class ◽  
Craniofacial Features

Basal cell nevus syndrome (BCNS) is a rare genetic disorder that can be caused by mutation of multiple genes, including PTCH1, PTCH2, and SUFU, in an autosomal dominant manner. The symptoms include some craniofacial features such as keratocystic odontogenic tumors (KCOTs), macrocephaly, and cleft lip and/or palate. Although comprehensive orthodontic treatment is frequently required for some of these craniofacial deformities, there are few reports that show the outcomes of comprehensive orthodontic treatment. Here, we report a case of BCNS with multiple KCOTs, macrocephaly, skeletal class III malocclusion, asymmetric dental arch, and mandibular crowding, which was successfully treated with comprehensive orthodontic treatment.

scholarly journals Class II Division 1 malocclusion treatment using TADs: Case report

2020 ◽  
Vol 67 (3) ◽  
pp. 159-164
Author(s):  
Tina Pajevic ◽  
Jovana Juloski ◽  
Marija Zivkovic
Keyword(s):  
Case Report ◽  
Orthodontic Treatment ◽  
Class Ii ◽  
Dental Arch ◽  
Class Ii Malocclusion ◽  
Posterior Teeth ◽  
Temporary Anchorage Devices ◽  
Division 1 ◽  
Incisor Retraction ◽  
Class Ii Division 1

Introduction. Orthodontic treatment of Class II Division 1 (II/1) malocclusions in adults can be challenging since skeletal effects are limited. Possible treatment options are orthodontic camouflage or orthognatic surgery, in severe cases. The aim of this paper was to present a successful management of Class II malocclusion in an adult patient using temporary anchorage devices (TADs). Case report. After detailed clinical examination, study models and cephalometric analysis, a 26 years old patient was diagnosed with Class II malocclusion, an overjet of 12 mm, congenitally missing tooth 41 and midline shifted to the right in upper dental arch. In prior orthodontic treatment, patient had upper premolars extracted. Posterior teeth in upper left quadrant were shifted mesially. The camouflage treatment was considered, using temporary anchorage devices (TADs) to distalize posterior teeth on the left side, and gain space for incisor retraction and midline correction in upper dental arch. Results. Using TADs as additional anchorage in anterior region and coil spring for molar distalization, the space was made for tooth 23, midline correction and incisor retraction. After 40 months, a satisfactory result was achieved, overjet and midline correction, class I canines occlusion and class II molar occlusion. Conclusion. Class II/1 malocclusion in adults can be successfully treated using TADs. The success depends on the severity of malocclusion and patient cooperation.

scholarly journals Dentoskeletal Class II Malocclusion: Maxillary Molar Distalization with No-Compliance Fixed Orthodontic Equipment

2020 ◽  
Vol 8 (1) ◽  
pp. 26
Author(s):  
Vincenzo Quinzi ◽  
Enrico Marchetti ◽  
Luigi Guerriero ◽  
Floriana Bosco ◽  
Giuseppe Marzo ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Final Analysis ◽  
Class Ii ◽  
Dental Arch ◽  
Class Ii Malocclusion ◽  
Exclusion Criteria ◽  
Molar Distalization ◽  
Maxillary Molars ◽  
Maxillary Molar ◽  
Orthodontic Devices

Dentoskeletal class II malocclusion due to a protruded upper dental arch is a major reason for an orthodontic treatment. In these cases, the correction of class II can be hindered by molar distalization, obtained with ‘no-compliance therapy’ that involves the use of appliances which minimize the need for such co-operation and attempt to maximize the predictability of results. The aim of this review was to outline the effectiveness of no-compliance fixed orthodontic devices in the molar distalization. After selection according to the inclusion/exclusion criteria, 16 articles from 2000 to 2019 were qualified for the final analysis. The literature shows various no-compliance fixed devices whose effect is to distalize the maxillary molars. The present revision allows to conclude that there is a need to increase the number of studies, especially with regard to the most recently introduced devices in the literature. The analysed studies allow to hypothesize that these appliances act with a minimal variability of molar distalization and disto-inclination among them, although different effects among the appliances can be observed as regards to the anchorage.

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