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2022

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Articles 6361 - 6390 of 23769

Full-Text Articles in Medicine and Health Sciences

Orthodontic Treatment For A Periodontally Compromised Class Ii Malocclusion - A Case Report, Jiun-Hao Lin, Kuan-Yi Wu, I-Ling Hong, Yi-Jane Chen Aug 2022

Orthodontic Treatment For A Periodontally Compromised Class Ii Malocclusion - A Case Report, Jiun-Hao Lin, Kuan-Yi Wu, I-Ling Hong, Yi-Jane Chen

Taiwanese Journal of Orthodontics

Adult orthodontic treatment has become increasingly popular. The primary motivating factor for seeking orthodontic treatment in adults is facial and dental esthetics, especially the alignment of their anterior teeth. Pathologic migration of anterior teeth is a common cause of esthetic concern among adult patients. The anchorage control is very important in the orthodontic treatment for the dentition with compromised periodontal support. Mini-implant anchorage provides a good solution to this situation. However, the force level should be light and consistent. Herein we report a 33-year-old female patient who presented a Class II division 1 malocclusion with maxillary anterior crowding, protrusion, and …

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Comparison Of Two Different Treatment Methods On White Spot Lesions After Orthodontic Treatment, Li-Ling Kao, Hsiu-Ming Hsu, Chuan-Yang Chang, Jia-Kuang Liu Aug 2022

Comparison Of Two Different Treatment Methods On White Spot Lesions After Orthodontic Treatment, Li-Ling Kao, Hsiu-Ming Hsu, Chuan-Yang Chang, Jia-Kuang Liu

Taiwanese Journal of Orthodontics

The aims of the study were to compare the degree of demineralization and the size alteration of white spot lesions after orthodontic treatment using fluoride dentifrice or tooth mousse therapy. Twelve upper incisors with demineralized white spot lesions of eight participants were identified after fixed appliances were removed. These participants were randomly and double blindly assigned to use one of the two dentifrices (TM and FD). Degree of demineralization was examined using DIAGNodent pen and digital photographs were taken at bracket removal, 4 weeks and 8 weeks later. Image J, one image processing software, was used to measure the size …

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A Research Report – Congenitally Missing Teeth In Unilateral Cleft Lip And Alveolus Children, Hsien-Lin Chuang, Wen-Ching Tsai, Wei-Yung Hsu Aug 2022

A Research Report – Congenitally Missing Teeth In Unilateral Cleft Lip And Alveolus Children, Hsien-Lin Chuang, Wen-Ching Tsai, Wei-Yung Hsu

Taiwanese Journal of Orthodontics

Objective: To retrospectively study the dentition of southern Taiwan children with unilateral complete cleft lip and alveolus for the prevalence of hypodontia. Patients: 680 Taiwan children with unilateral complete cleft lip and alveolus aged between 10 and 12 years from July, 1983 to June, 2008 in Department of Orthodontics, Kaohsiung Chang Gung Memorial Hospital. Material and methods: Dental records were studied as were the panoramic radiograph, periapical films of anterior teeth, upper occlusal films and dental model from which the dentition was examined. Results: The prevalence of congenitally missing maxillary lateral incisor was 79.12% of cleft side and 3.82% on …

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The Relation Between Maxillary Molar Intrusion By Using Mini-Implants And The Change Of Mandibular Plane In Hyperdivergent Skeletal Class Ii Patients, Ya-Ying Teng, Eric Jein-Wein Liou Aug 2022

The Relation Between Maxillary Molar Intrusion By Using Mini-Implants And The Change Of Mandibular Plane In Hyperdivergent Skeletal Class Ii Patients, Ya-Ying Teng, Eric Jein-Wein Liou

Taiwanese Journal of Orthodontics

Purpose: To investigate the relation between the change of mandibular plane and maxillary molar intrusion with mini-implants. Materials and Methods: Twenty-eight consecutive adult patients with skeletal Class II, retrognathic mandible and high mandibular plane were included (mean age: years). They were treated with 4 premolar extractions and mini-implants for maxillary molar intrusion. The pre-treatment (T0) and post-treatment (T1) lateral cephalograms were traced and superimposed to measure the changes of parameters. Pearson correlation coefficient was calculated to determine the correlation between the molar intrusion and the change of mandibular plane. Results: The upper molars were intruded mm. The lower molars were …

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Planning The Surgery-First Approach In Surgical-Orthodontic Treatment With A Computer Aided Surgical Simulation (Cass) Planning Protocol, Sam Sheng-Pin Hsu, Dhruv Singhal, James J. Xia, Jaime Gateno, Cheng-Hui Lin, Chiung-Shing Huang, Lun-Jou Lo, Ellen Wen-Ching Ko, Yu-Ray Chen Aug 2022

Planning The Surgery-First Approach In Surgical-Orthodontic Treatment With A Computer Aided Surgical Simulation (Cass) Planning Protocol, Sam Sheng-Pin Hsu, Dhruv Singhal, James J. Xia, Jaime Gateno, Cheng-Hui Lin, Chiung-Shing Huang, Lun-Jou Lo, Ellen Wen-Ching Ko, Yu-Ray Chen

Taiwanese Journal of Orthodontics

The surgery-first approach in surgical orthodontic treatment is re-emerging as the preferred technique when compared to the traditional orthodontic first-approach. Despite its growing popularity, no planning protocol that offers comprehensive and accurate predictions has been described for the surgery-first approach. In this article, the authors utilize computer aided surgical simulation (CASS) to provide two planning methods for the surgery-first approach. The benefits of using CASS for planning include enhanced 3-dimensional visualization of treatment progression, the ability for surgeons and orthodontists to discuss and visualize in detail any potential treatment algorithm, and providing a more precise prediction for the surgeon, orthodontist, …

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Face Asymmetry And Mandibular Bite Collapse Corrected With Orthognathic Surgery And Miniscrews In A Patient With Wilson’S Disease, Yi-Chin Wang, Ellen Wen-Ching Ko, Philip Kuo-Ting Chen Aug 2022

Face Asymmetry And Mandibular Bite Collapse Corrected With Orthognathic Surgery And Miniscrews In A Patient With Wilson’S Disease, Yi-Chin Wang, Ellen Wen-Ching Ko, Philip Kuo-Ting Chen

Taiwanese Journal of Orthodontics

An adult female patient aged 34 years and 8 months with Wilson’s disease, a rare autosomal recessive genetic disorder, demonstrated poor chewing ability and facial asymmetry which were worsened gradually since the disease attacked her 10 years ago. She was treated by surgical orthodontics with minimal presurgical orthodontic decompensation. We designed an atypical maxillary anterior subapical osteotomy to close the maxillary incisor pontic space, retract anterior segment of the maxilla, and maintain the dental midline simultaneously. The mandible deviation was corrected by bilateral sagittal split osteotomies. Severe bilateral posterior bite collapses were uprighted effectively and efficiently by miniscrews combined with …

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Orthodontic Treatment Of Class Iii Malocclusion And Mandibular Deviation By Modified Multiloop Edgewise Archwire (Meaw) Technique – Case Report, Nien-Shan Yang, Yin-Fui Chu, Hong-Po Chang Aug 2022

Orthodontic Treatment Of Class Iii Malocclusion And Mandibular Deviation By Modified Multiloop Edgewise Archwire (Meaw) Technique – Case Report, Nien-Shan Yang, Yin-Fui Chu, Hong-Po Chang

Taiwanese Journal of Orthodontics

Class III malocclusion with mandibular protrusion and lateral displacement are commonly observed at orthodontic clinic. If patients don’t accept orthognathic surgery and belong to mild to moderate malocclusion, non-surgery treatment will be available. This was a 25-year-old female; her chief complaint was anterior crossbite with anterior spacing and mandibular protrusion. The diagnosis was dental and skeletal Class III malocclusion with mandibular prognathism. The patient was successfully treated with fixed orthodontic appliance by modified Multiloop Edgewise Archwire (MEAW) Technique and asymmetric elastics. The total treatment time was one year and 8 months. Good alignment and occlusion with coincident dental midline, and …

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Dental And Skeletal Correction Of Möbius Syndrome: A Case Report, Yea-Ling Yang, Ellen Wen-Ching Ko, Chiung-Shing Huang, Yu-Ray Chen Aug 2022

Dental And Skeletal Correction Of Möbius Syndrome: A Case Report, Yea-Ling Yang, Ellen Wen-Ching Ko, Chiung-Shing Huang, Yu-Ray Chen

Taiwanese Journal of Orthodontics

A 26-year-old female presented with Möbius syndrome. She came with chief complaint of excessive exposure her front teeth. She had Class III malocclusion with anterior cross bite. However she had a hyperdivergent face and backward rotation of the mandible without effective chin. After evaluation, she underwent orthognathic surgery and orthodontic treatment. The surgical techniques for correction her skeletal problems included maxillary Le Fort I osteotomy impaction and setback; mandibular bilateral sagittal split osteotomies setback; advancement and reduction genioplasty. The two-year follow up after treatment indicated that the surgical outcome and occlusion were stable.

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The Application Of Removable Ball-Type Palatal Expander In Adult Patients With Maxillary Transverse Deficiency – Case Report, Yi-Ming Kung, Chun-Liang Kuo, I-Hua Liu, Hui-Lin Chen Aug 2022

The Application Of Removable Ball-Type Palatal Expander In Adult Patients With Maxillary Transverse Deficiency – Case Report, Yi-Ming Kung, Chun-Liang Kuo, I-Hua Liu, Hui-Lin Chen

Taiwanese Journal of Orthodontics

In clinical, the maxillary transverse development insufficiency of the patients often have the posterior crossbite and arch narrow circumstances, there are some impact in the pronunciation, chewing functions, and even for appearance. In childhood, these problems can be improved by rapid palatal expander correction device to stimulate the maxilla suture zone growth and development. However, the adult’s palate suture zones have been closed; if the maxilla needs to do a significant expansion, it often has to assist by the way of surgery to resolve. This report presents two examples of these adult cases utilize wearing the removable ball-type palatal expander …

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Correction Of Class Iii Malocclusion And Facial Asymmetry With Clockwise Rotation Of Maxillo-Mandibular Complex, Ya-Ying Teng, Cheng-Ting Ho Aug 2022

Correction Of Class Iii Malocclusion And Facial Asymmetry With Clockwise Rotation Of Maxillo-Mandibular Complex, Ya-Ying Teng, Cheng-Ting Ho

Taiwanese Journal of Orthodontics

The double-jaw surgery is frequently desirable to correct skeletal discrepancies and obtain better esthetic results for patients with severe skeletal Class III deformities. Instead of standard surgical principles, an alternative rotation of the maxillo-mandibular complex (MMC) is frequently required for patients with extreme degrees of skeletal discrepancies to achieve optimal facial esthetics. As shown in the case report, the clockwise rotation of MMC was planned for the adult male patient with skeletal class III that resulted in increasing the fullness of paransal area, reducing the lower anterior facial height and decreasing the chin projection by 14 mm. The proper facial …

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The Investigation On Medical Dispute Of Clinical Orthodontic Practice In Taiwan – A Preliminary Study, Sam Sheng-Pin Hsu, Yu-Kun Chih Aug 2022

The Investigation On Medical Dispute Of Clinical Orthodontic Practice In Taiwan – A Preliminary Study, Sam Sheng-Pin Hsu, Yu-Kun Chih

Taiwanese Journal of Orthodontics

Purpose: The prevalence of medical disputes or controversies in orthodontic treatment is getting higher and higher in Taiwan. Nevertheless, the related researches and literatures are few. The purpose of this study was to investigate and analyze the situation of medical disputes or controversies in clinical orthodontic practice in Taiwan. Materials and methods: The investigation was done by the questionnaire survey among the dentists who perform orthodontic treatment as either part or all of his/her clinical practice. Totally seventy-two valid questionnaires were collected. The outcome of each question was shown as percentage. Results: Twenty-eight percent of all respondents had ever experienced …

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Postretention Changes In Intercanine Widths Following Orthodontic Treatment, Yueh-Tse Lee Aug 2022

Postretention Changes In Intercanine Widths Following Orthodontic Treatment, Yueh-Tse Lee

Taiwanese Journal of Orthodontics

Changes in dental arch width during treatment and the postretention period are ongoing issues in orthodontics. Studies have documented that changes in arch dimensions occur during orthodontic treatment regardless of whether extractions were adopted or not. This has led to continued debate regarding the method that delivers better long-term results. Maintenance of pretreatment intercanine widths has been suggested to be the key to the posttreatment stability of the dental arch. Additionally, smile esthetics are also influenced by the changes in intercanine widths, leading to a debate that involves smile esthetics as well as long-term stability. This article reviews the postretention …

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Combined Fronto-Facial Monobloc Distraction Osteogenesis And Orthognathic Surgery In A Patient With Crouzon Syndrome – A Case Report, Yi-Hsuan Chen, Ellen Wen-Ching Ko, Philip Kuo-Ting Chen, Chiung-Shing Huang Aug 2022

Combined Fronto-Facial Monobloc Distraction Osteogenesis And Orthognathic Surgery In A Patient With Crouzon Syndrome – A Case Report, Yi-Hsuan Chen, Ellen Wen-Ching Ko, Philip Kuo-Ting Chen, Chiung-Shing Huang

Taiwanese Journal of Orthodontics

Treatment for patients with craniofacial anomalies always presents a great challenge to orthodontists and craniofacial surgeon. Treatment usually requires craniofacial reconstructive surgery, comprehensive orthodontic treatment and orthognathic surgery. In this article, we report a patient with Crouzon syndrome treated by frontofacial monobloc distraction osteogenesis, comprehensive orthodontics and orthognathic surgery.

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The Use Of Pendulum Appliance Combines “Cutting Edge” Brackets In These Patients With Crowding Dentition, Fang-Yu Shen, Yi-Hwa Liu, Chun-Liang Kuo, Hui-Lin Chen Aug 2022

The Use Of Pendulum Appliance Combines “Cutting Edge” Brackets In These Patients With Crowding Dentition, Fang-Yu Shen, Yi-Hwa Liu, Chun-Liang Kuo, Hui-Lin Chen

Taiwanese Journal of Orthodontics

Using intraoral molar distalization appliance is one of the treatments of patients with crowding dentition besides extraction for crowding relief and achievement of normal occlusion. However, how to keep the space gained with the intraoral appliance for crowding relief is what we need to consider. In this paper, we use pendulum appliance combines "cutting edge" brackets (Tip-Edge Plus) in these patients with crowing dentition without other auxiliary intraoral or extraoral appliances.

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Treatment Of Class Ii Division 1 Malocclusion With High Mandibular Plane Angle By Miniscrews – A Case Report, Hsin-Lan Shen, Eric Jein-Wein Liou Aug 2022

Treatment Of Class Ii Division 1 Malocclusion With High Mandibular Plane Angle By Miniscrews – A Case Report, Hsin-Lan Shen, Eric Jein-Wein Liou

Taiwanese Journal of Orthodontics

This 16-year-old female presents with Class II Division 1 subdivision right malocclusion, complicated by gummy smile, large mandibular plane angle and the mandibular right first molar missing. Treatment consisted of 4 temporary anchorage devices (TADs) application and extraction of bilateral maxillary first premolars and the mandibular left first premolar. Bimaxillary anterior and posterior teeth were intruded by miniscrews for counterclockwise rotation of the mandible. A very favorable result was achieved due to reduction of gingival display and the mandibular plane angle was decreased successfully.

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Morphologic Characteristics Of Adult Patients With Facial Asymmetry Treated By Orthodontic Therapy Or Orthognathic Surgery, Yu-Chuan Tseng, Kai-Chieh Ou, Chin-Yun Pan, Szu-Ting Chou, Hong-Po Chang Aug 2022

Morphologic Characteristics Of Adult Patients With Facial Asymmetry Treated By Orthodontic Therapy Or Orthognathic Surgery, Yu-Chuan Tseng, Kai-Chieh Ou, Chin-Yun Pan, Szu-Ting Chou, Hong-Po Chang

Taiwanese Journal of Orthodontics

Facial asymmetry is a common feature in orthodontic patients. Mild skeletal facial asymmetry can be treated effectively by camouflaged orthodontic technique. Orthodontic treatment combined with orthognathic surgery would be suggested in some extreme cases of facial asymmetry. Although traditional posteroanterior cephalogram was 2D image, it was still full of reference meaning and value for diagnosing the asymmetric component in craniofacial area. The objective of this research was to investigate the differences in morphological characteristics of facial asymmetry patient who can be treated by orthodontic therapy only or combined orthognathic surgery. The pre-treatment postero-anterior cephalograms of two groups of 60 subjects …

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Natural Development And Changes In Intercanine Widths Of Untreated Dentitions, Yueh-Tse Lee Aug 2022

Natural Development And Changes In Intercanine Widths Of Untreated Dentitions, Yueh-Tse Lee

Taiwanese Journal of Orthodontics

Dental arch dimensions undergo visible alterations as they grow, adapt, and age. Relatively rapid changes occur during the transitional dentition. Once a functional permanent dentition is established, smaller changes continue to be observed. The concept of maintainting of intercanine dimensions as an indicator for posttreatment stability has been supported by studies in the literature. An understanding of the development and changes in intercanine widths helps in distinguishing changes occurred from natural growth or appliance therapy, planning orthodontic treatment, and assessing stability and smile esthetics following orthodontic treatment. This article attempts to review the literature and summarizes the natural development and …

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Comparison Of Mandibular Arch Changes With Self-Ligating And Conventional Brackets, Szu-Jung Huang, Yu-Chuan Tseng, Chin-Yun Pan, Szu-Ting Chou, Hong-Po Chang Aug 2022

Comparison Of Mandibular Arch Changes With Self-Ligating And Conventional Brackets, Szu-Jung Huang, Yu-Chuan Tseng, Chin-Yun Pan, Szu-Ting Chou, Hong-Po Chang

Taiwanese Journal of Orthodontics

The purpose of this research is to compare the arch changes after non-extraction orthodontic treatment on the mandibular crowding dentition between self-ligating and conventional bracket systems. Seventy-one samples that satisfied the criteria were selected from the patient database, including forty samples in the conventional bracket group and thirty-one in the self-ligating bracket group. Pre-treatment and post-treatment intercanine width, interpremolar width, intermolar width, arch perimeter and arch length were measured from the study cast, and angulation and position of mandibular incisors were measured from the cephalometric radiograph. The result showed that after non-extraction treatment on the crowding mandibular dentition, increases in …

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Combined Anterior And Posterior Subapical Segmental Osteotomy Treatment Of Bimaxillary Protrusion With Chin Deficiency — A Case Report, Hsin-Lan Shen, Cheng-Ting Ho, Chen-Tah Huang Aug 2022

Combined Anterior And Posterior Subapical Segmental Osteotomy Treatment Of Bimaxillary Protrusion With Chin Deficiency — A Case Report, Hsin-Lan Shen, Cheng-Ting Ho, Chen-Tah Huang

Taiwanese Journal of Orthodontics

This case report presents a 39 years old female adult patient which diagnosis was skeletal Class II and dental Class III malocclusion with severe bimaxillary protrusion, chin deficiency and two maxillary supernumerary teeth over premolars area. The treatment plan were combined with orthodontic treatment and orthognathic surgery including bimaxillary anterior subapical segmental osteotomy, posterior subapical segmental osteotomy over right mandibular area and genioplasty. The treatment was finished in Angle’s Class I occlusion of both canine and molar relationships. Patient had normal overjet and overbite, lips competency and her facial esthetic have improved a lot. We also make some discussion about …

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A Case Report – Half-Year-Follow Up Of A Case With Bilateral Condylar Head Missing Treated By Orthodontic Treatment Combined With Lefort I Osteotomy, Te-Ju Wu, Wen-Ching Tsai, Wei-Yung Hsu Aug 2022

A Case Report – Half-Year-Follow Up Of A Case With Bilateral Condylar Head Missing Treated By Orthodontic Treatment Combined With Lefort I Osteotomy, Te-Ju Wu, Wen-Ching Tsai, Wei-Yung Hsu

Taiwanese Journal of Orthodontics

This is a case report about an adult female patient with bilateral idiopathic condylar resorption. Extraoral check revealed obvious convex profile with retruded chin, lip incompetence; intraoral check revealed class I malocclusion with moderate crowding. Owing to the bilateral condylar resorption, the condyle position may not be easily hold during operation; besides, trying to maintain the integrity of whole mandible to avoid post treatment relapse. The final treatment plan was orthodontic treatment combined with LeFort I osteotomy. After post-surgical active retention for 1 year, final results showed improved facial profile. The half-year post-treatment follow up revealed up acceptable treatment result …

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Treatment Of Skeletal Class Iii Malocclusion With Anterior Openbite With Skeletal Anchorage System, Li-Fang Hsu, Yi-Min Liu, Fong-Lan Chan, Chung-Chen Jane Yao, Yi-Jane Chen Aug 2022

Treatment Of Skeletal Class Iii Malocclusion With Anterior Openbite With Skeletal Anchorage System, Li-Fang Hsu, Yi-Min Liu, Fong-Lan Chan, Chung-Chen Jane Yao, Yi-Jane Chen

Taiwanese Journal of Orthodontics

Skeletal Class III with anterior open bite is one of the most challenging problems that orthodontists may encounter. Treatment modalities for skeletal openbite malocclusion include growth modification and surgicalorthodontic therapy; which treatment is chosen depends on the patient’s age and growth potential. Treatment considerations should focus on the patient’s facial profile, skeletal pattern, growth potential, and severity of dental malocclusion. Here, we present the nonsurgical orthodontic treatment of an adult patient with anterior openbite and high-angle skeletal Class III facial pattern. The soft tissue problems associated with anterior openbite included lip incompetency and tongue thrusting habit. We corrected the dental …

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Cephalometric Linear Measurements On Conventional Digital Cephalograms And Cone-Beam Ct 3-D Craniofacial Images, Zwei-Chieng Chang, Yu-Chun Huang, Eddie Lai, Chung-Chen Yao, Yi-Jane Chen Aug 2022

Cephalometric Linear Measurements On Conventional Digital Cephalograms And Cone-Beam Ct 3-D Craniofacial Images, Zwei-Chieng Chang, Yu-Chun Huang, Eddie Lai, Chung-Chen Yao, Yi-Jane Chen

Taiwanese Journal of Orthodontics

Introduction: The purpose of this study was to investigate the correlation between the actual linear measurements on human skull and the cephalometric measurements obtained from conventional digital cephalogram and cone-beam computed tomography (CBCT) 3-D images. Materials and Methods: Lateral and postero-anterior cephalograms of 3 skulls were assessed by measuring the commonly used 11 linear measurements. The CBCT volume images were obtained and measured by using 3-D image software (i-CAT/ Simplant Pro 12.02). The measurements with conventionally manual tracing method, WinCeph software (2-D), and those on 3-D images were compared with the gold standards derived from repeated caliper measurements of the …

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Application Of 3-Dimensional Casting Model From Ct Scan In The Orthognathic Surgery To Correct Facial Asymmetry – A Case Report., Yu-Jen Chang, Wen-Ching Tsai, Chia-Yu Wang, Wei-Yung Hsu Aug 2022

Application Of 3-Dimensional Casting Model From Ct Scan In The Orthognathic Surgery To Correct Facial Asymmetry – A Case Report., Yu-Jen Chang, Wen-Ching Tsai, Chia-Yu Wang, Wei-Yung Hsu

Taiwanese Journal of Orthodontics

In treating patients with facial asymmetry, orthognathic surgery is often needed in combination with orthodontic treatment. Conventional surgical treatment planning uses dental casts and two-dimensional radiography to predict the amount of movement needed. However, the real movement modeled on the mounted casts on the articulator cannot be simulated accurately based on the two-dimensional radiographs. In this case report, we presented a new method using three-dimensional casting model for surgical planning and design. This case report presented an 18-year-old female (at the time of surgery), diagnosed as Class III malocclusion with facial asymmetry. The surgical plan was orthodontic treatment combined with …

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Intraoral Iatrogenic Injuries In Orthodontics: Etiology, Prevention, And Management, Te-Yi Teng, Yu-Kun Chih Aug 2022

Intraoral Iatrogenic Injuries In Orthodontics: Etiology, Prevention, And Management, Te-Yi Teng, Yu-Kun Chih

Taiwanese Journal of Orthodontics

The iatrogenic injuries, which often lead to medical tangles, have been widely discussed in recent years.The areas of intraoral iatrogenic injuries in orthodontics include both hard tissues and soft tissues: tooth, alveolar bone, gingiva, oral mucosa, nerve and so on. Almost every procedure during orthodontic therapy could result in unpredictable injuries. To avoid negative effects, the clinicians should understand all causes of various iatrogenic injuries, and take measures during orthodontic treatment. This article discusses the etiologies, prevention and management of intraoral injuries, and it may help for clinicians.

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Treatment Of Asymmetric Premolar Extractions With Mini-Implant – Case Report, Chih-Yu Lin, Li-Hsiang Lin, Chih-Peng Su, Sheng-Yang Lee Aug 2022

Treatment Of Asymmetric Premolar Extractions With Mini-Implant – Case Report, Chih-Yu Lin, Li-Hsiang Lin, Chih-Peng Su, Sheng-Yang Lee

Taiwanese Journal of Orthodontics

A case was presented with an adult male patient diagnosed as skeletal class III and dental class I malocclusion, and complaining of his dental crowding. Undergone orthodontic related examinations and periodontal evaluations, the treatment plan was to combine atypical extraction with insertion of mini-implants into mandible, in order to facilitate control of anchorage. After the treatment, lateral profile and occlusion were both apparently improved. Discussions were made about usage of mini-implants in this case and other possible ways to treat the patient.

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Correction Of A Lingual Tipped Mandibular Second Molar With Miniscrew Orthodontics – Case Report, Chun-Hung Yu, Sam Sheng-Pin Hsu, Yang-Ming Chang Aug 2022

Correction Of A Lingual Tipped Mandibular Second Molar With Miniscrew Orthodontics – Case Report, Chun-Hung Yu, Sam Sheng-Pin Hsu, Yang-Ming Chang

Taiwanese Journal of Orthodontics

A case of a 14 y/o male patient with a lingually impacted mandibular right 2nd molar was presented. After the third molar was extracted, a closed coil spring was used to connect the impaction to a miniscrew inserted in the nearby buccal shelf. Throughout the treatment process, all orthodontic appliances were hidden underneath the flap. The advantage of this closing flap technique is that it improves patient comfort while minimizing irritation to the surround muscle and soft tissue. Treatment options for uprighting lingually impacted mandibular 2nd molar, clinical considerations of orthodontic miniscrew placement, and design of biomechanics were also discussed.

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Combined Surgical And Orthodontic Treatment Of Palatally Impacted Canines – A Case Report, Chen-Jung Chang, Jia-Kuang Liu, Shih-Chung Liao, Chuan-Yang Chang Aug 2022

Combined Surgical And Orthodontic Treatment Of Palatally Impacted Canines – A Case Report, Chen-Jung Chang, Jia-Kuang Liu, Shih-Chung Liao, Chuan-Yang Chang

Taiwanese Journal of Orthodontics

Maxillary canines are essential for function and esthetics. Patients with impacted maxillary canine are considered to be more difficult to treat than the average orthodontic patients because successful treatment requires proper surgical technique and orthodontic mechanisms. This case report describes the treatment of a 10-year-old boy with a palatally impacted canine and rotated premolar. Using closed exposure with placement of an attachment, following by distal orthodontic force to bring the canine crown away from the root of lateral incisor, then buccal traction into normal occlusion. Total treatment time was 2 years and six months. We obtained favorable esthetics and stable …

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Factors Affecting The Treatment Duration Of Forced Eruption Of Impacted Incisors – A Reprospective Study, Liang-Ru Chen, Hsin-Yi Lo, Kwong-Wa Li, Jeng-Fen Liu, Yong-Kie Wong Aug 2022

Factors Affecting The Treatment Duration Of Forced Eruption Of Impacted Incisors – A Reprospective Study, Liang-Ru Chen, Hsin-Yi Lo, Kwong-Wa Li, Jeng-Fen Liu, Yong-Kie Wong

Taiwanese Journal of Orthodontics

Purpose: The purpose of this study was to evaluate the possible factors that affected the duration of forced eruption of impacted upper incisors. Methods: 24 patients (mean age eight years and nine months old ), 25 upper impacted incisors were included in this study. Factors analysed included the age, the distance from impacted incisor edge to the occlusal plane, presence of odontoma or supernumerary tooth, the crown orientation,eruption space loss and root dilaceration. Standardized panoramic radiograph was used as measurement tool.Results: The treatment duration is positively correlated to the distance from the incisor ledge to the occlusal plane (R2 =0.21; …

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Diagnosis Of Impacted Permanent Maxillary Canines, Pi-Huei Liu, Hui-Chen Tsai, Mu-Hsiung Chen, Te-Lan Chien, Jenny Zwei-Chieng Chang, Chung-Chen Jane Yao Aug 2022

Diagnosis Of Impacted Permanent Maxillary Canines, Pi-Huei Liu, Hui-Chen Tsai, Mu-Hsiung Chen, Te-Lan Chien, Jenny Zwei-Chieng Chang, Chung-Chen Jane Yao

Taiwanese Journal of Orthodontics

Maxillary permanent canine impaction is a dental anomaly often seen in orthodontic practice. Many articles discussed about the diagnosis and prognosis of impacted canine in these years. This article summarized several methods of early diagnosis and the prognosis prediction for canine impaction, thus, can help dentists to make appropriate treatment plans.

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Cephalometric Study Of Adult Class Iii Malocclusions Treated With Orthodontic Therapy Or Orthognathic Surgery, Yu-Chuan Tseng, Chen-Yi Liao, Hong-Po Chang Aug 2022

Cephalometric Study Of Adult Class Iii Malocclusions Treated With Orthodontic Therapy Or Orthognathic Surgery, Yu-Chuan Tseng, Chen-Yi Liao, Hong-Po Chang

Taiwanese Journal of Orthodontics

The Class III malocclusion is the most difficult anomalies to understand. The purpose of this study was to investigate the differences in morphological characteristics of Class III malocclusion patient who can properly treated by orthodontic treatment only or combined orthognathic surgery. To find the most important morphological factors those influence the treatment planning and predict probability of orthognathic surgery. The pre-treatment lateral cephalograms of two groups of 80 subjects (40 orthodontic and 40 surgical) with Class III malocclusion were analyzed. Thirty-seven linear, proportional, angular and soft tissue measurements were made. Two sample t test was applied to identify the dentoskeletal …

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