Management Of Skeletal Class Iii Malocclusion With Deep Bite And Moderate Overjet Using Improved Super-Elastic Ti-Ni Alloy Wire (Isw), Wen-Hsuan Lin, Ching-Yu Yang, Yuan-Hou Chen, Jian-Hong Yu

Taiwanese Journal of Orthodontics

A 20-year-old female presented with concerns about poor dental alignment and a tendency to bite on her lip easily. Clinical examination revealed a concave and brachy facial profile, accompanied by a deep overbite and a moderate overjet. Radiographic examination showed skeletal Class III with a low mandibular plane angle. Correction of the deep bite was achieved by using the Improved Super-elastic Ti-Ni alloy Wire (ISW) and Intermaxillary elastics (IMEs). To correct the moderate overjet, interproximal reduction (IPR), the Multi-bend Edgewise Archwire (MEAW) technique, and arch lengthening of the lower arch were applied. The active treatment duration took approximately 54 months, …

Improved Super-Elastic Ti-Ni Alloy Wire For The Treatment Of Skeletal Class Iii Malocclusion With Anterior Crossbite And Missing Lower Molar, De-Lun Zhuang, Yuan-Hou Chen, Jian-Hong Yu

Taiwanese Journal of Orthodontics

This case report describes the use of Improved Super-elastic Ti-Ni alloy wire (ISW), developed by Tokyo Medical and Dental University, in managing a skeletal Class III malocclusion with anterior crossbite and a missing lower molar. A 26-year-old female presented with a chief complaint of poor dental alignment. Clinical and radiographic evaluation revealed Angle Class III malocclusion, anterior crossbite, a missing mandibular first molar (36), and a centric occlusion–centric relation (CO–CR) functional shift, consistent with a skeletal Class III pattern. Treatment involved the use of ISW for leveling and alignment of both arches and correction of the anterior crossbite, while maintaining …

Inferior Alveolar Nerve Proximity In Mandibular Molar Distalization: Implications For Orthodontic Treatment Planning, Samantha Hsien-Chu Mao, Chia-Hsuan Chan, Yu-Jen Chang, Shiu-Shiung Lin, Chen-Feng Cheng, Te-Ju Wu

Taiwanese Journal of Orthodontics

Purpose: This study aimed to clarify the anatomical boundaries of mandibular molar distalization, emphasizing the risk of inferior alveolar nerve (IAN) contact. Patients and Methods: In total, 30 skeletal Class III patients undergoing orthognathic surgery (59 mandibular hemi-arches) were analyzed using pretreatment three-dimensional (3D) computed tomography scans. The shortest horizontal distance between the mandibular second molar and the inferior alveolar canal (M2-IAC) was measured at multiple depths below the cementoenamel junction, along with the distance to the lingual cortical plate (M2-MLC). Samples were categorized by vertical facial pattern (low-, normal-, and high-angle case). Simulated distalization cases predicting IAN contact were …

Comparative Evaluation Of Selected Properties Of Tetrahedral Amorphous Carbon (Ta-C) Coated And Uncoated Beta Titanium (Β-Ti) Archwires - An In Vitro Study, Abhinaya Jotheswaran, Kurunji Kumaran Navaneethakrishnan

Taiwanese Journal of Orthodontics

Objective: The development of newer archwires can be achieved either by discovering novel materials or by modifying existing ones. The objective of the present study was to coat beta-titanium (β-Ti) archwires with tetrahedral amorphous carbon (ta-C)/hard carbon and to evaluate selected physical and mechanical properties. Methods: Hard carbon–coated (n = 5) and uncoated (n = 5) β-Ti wires were assessed for surface roughness, wear resistance, load-deflection characteristics, and friction using appropriate testing apparatus under dry in vitro conditions. Results: Compared to uncoated β-Ti wires, ta-C–coated β-Ti wires demonstrated a statistically significant reduction in surface roughness, increased wear resistance, and lower …

Asymmetric Maxillary Molar Distalization And Guided Canine Eruption Using Temporary Anchorage Devices And Super-Elastic Niti Wire, Kah-Ying Yim, Huei-Mei Tsai, Yu-Ling Cheng, Ming-Jeaun Su, Yi-Min Liu

Taiwanese Journal of Orthodontics

An adult female patient presented with a pronounced maxillary dental midline deviation and localized crowding in the upper right quadrant, particularly involving the canine and second molar. The maxillary right canine was buccally erupted and overlapped the lateral incisor and first premolar due to insufficient arch space and unfavorable root proximity. The mandibular arch exhibited mild anterior crowding with a flat curve of Spee. Orthodontic treatment was initiated using preadjusted fixed appliances. Extraction of the maxillary right third molar was performed to allow immediate sequential distalization of the maxillary right molars. A bypassed-canine main archwire in combination with a temporary …

Management Of Lower Incisor Protrusion In An Angle Class Iii Malocclusion Using Improved Super-Elastic Ti-Ni Alloy Wire, Jr-Wei Jian, Yu-Hsiang Chang, Yi-Mien Cheng, Ming-Han Cheng, Jian-Hong Yu

Taiwanese Journal of Orthodontics

A 16-year-old adolescent female presented with the chief complaint of poor dental alignment and protrusion of the lower teeth. Clinical examination revealed Angle Class III malocclusion accompanied by lower anterior crowding and a protrusive lip profile involving both the upper and lower lips. Cephalometric analysis demonstrated a skeletal Class I relationship with a normal mandibular plane angle. To facilitate anterior retraction, four premolars (15, 24, 34, and 45) were extracted. Following extraction, Improved Super-elastic Ti-Ni alloy wire (ISW) was employed to relieve lower anterior crowding. Canine distalization and anterior retraction were subsequently performed. Elastic chains were used to assist midline …

Comparative Effectiveness Of Single Versus Two Miniscrews For Maxillary Incisor Intrusion In Gummy Smile: A Systematic Review And Meta-Analysis, Vaibhav Sunil Zanwar, Santosh Jetu Chavan, Jyoti Sunny Manchanda, Sakshi Santoshkumar Jain, Vedant S, Rishika Arya

Taiwanese Journal of Orthodontics

Background: Orthodontic intrusion of maxillary incisors is commonly used to treat gummy smiles in deep bite patients. The effectiveness of using one versus two miniscrews for this purpose remains debated. This systematic review and meta-analysis aimed to compare the dental effects of one versus two miniscrews for maxillary incisor intrusion.

Materials and Methods: A literature search was conducted across multiple databases for studies published up to December 31, 2024. Five studies (four randomized controlled trials and one non-randomized study) met the inclusion criteria. Risk of bias was assessed using the RoB 2 and ROBINS-I tools.

Results: Intrusion was greater in …

Correlation Between Maxillary Incisor Inclination And Buccopalatal Alveolar Bone Thickness Assessed By Cbct: A Retrospective Observational Study, Raee Korgaonkar, Nandini Kamat

Taiwanese Journal of Orthodontics

Purpose: This retrospective study aimed to evaluate the correlation between buccal and palatal alveolar bone thickness and the degree of maxillary incisor inclination. The objective was to derive clinically relevant insights for orthodontic treatment planning and controlled tooth movement. Materials and Methods: Sixty-one maxillary central incisors from cone-beam computed tomography (CBCT) scans of thirty-four subjects were retrospectively evaluated and grouped as proclined, upright, and retroclined incisors. Buccal and palatal thicknesses of cortical and cancellous alveolar bone were measured at various levels of the incisor root. The correlation between bone thickness and incisor angulation was investigated using Spearman’s correlation test. Results: …

Evaluation Of Mandibular Buccal Shelf Bone Thickness And Height For Miniscrew Placement Using Cone-Beam Computed Tomography, Roji Shrestha, Rabindra Man Shrestha, Jyoti Dhakal, Sujita Shrestha

Taiwanese Journal of Orthodontics

Introduction: Buccal shelf area (BSA) is a recommended anatomic site for mini-screw insertion. Stability of miniscrew is determined by quantity of bone available in the region.

Objective: To determine bone thickness and height of BSA for optimum placement of miniscrew.

Materials and Methods: This cross-sectional observational study included 40 cone-beam computed tomography (CBCT) scans (23 males, 17 females) of patients aged 19-38 years. Patients were further divided into two age groups 19-28 years and 29-38 years. Measurements were made at 4 different sites: mandibular first molar mesial root (M6) and distal root (D6), second molar mesial root …

Camouflage Orthodontic Treatment Of Skeletal Class Ii Malocclusion With Missing Mandibular Incisors Using Improved Superelastic Ti–Ni Alloy Wire, Pin-Yu , Chen, Yuan-Hou Chen, Yuan-Hou Chen, Jian-Hong Yu

Taiwanese Journal of Orthodontics

This article presents a camouflage orthodontic treatment utilizing the improved superelastic Ti-Ni alloy wire (ISW) to address a case of skeletal Class II malocclusion with two missing mandibular incisors. A 28-year-old female patient with a chief complaint of poor dental alignment sought orthodontic evaluation. Clinical examination revealed a Class III molar relationship, mild crowding, and lingually positioning of tooth 35. Radiographic analysis confirmed a skeletal Class II pattern. The treatment plan included the application of an ISW curve over the maxillary arch to control anterior tooth inclination. Canine distal drive and anterior retraction were performed following the extraction of bilateral …

Interdisciplinary Orthodontic Management Of Class Ii Severe Hypodontia Using Improved Super-Elastic Ti-Ni Alloy Wire, Hsuan Jeng, Yuan-Hou Chen, Jian-Hong Yu

Taiwanese Journal of Orthodontics

This case report presents the orthodontic management of a 23-year-old male with severe hypodontia, specifically the congenital absence of all premolars and bilateral peg laterals. The patient sought treatment due to dissatisfaction with previous orthodontic outcomes, characterized by noticeable spacing in the upper anterior region. Clinical evaluation revealed a skeletal Class II relationship and several dental anomalies, prompting the need for an interdisciplinary approach.

The patient was treated using an improved super-elastic Ti-Ni alloy wire (ISW), which provided consistent light continuous forces, high elasticity, and super-elastic properties beneficial for controlling tooth movement in patients with missing teeth and anchorage limitations. …

Long-Term Interdisciplinary Management Of Severe Vertical Bony Defects Using Periodontal Accelerated Osteogenic Orthodontics (Paoo), Chun-Han Su, Huei-Mei Tsai, Yi-Min Liu, Yuen-Yung Tsang, Yu-Ling Cheng

Taiwanese Journal of Orthodontics

Background: Management of severe malocclusion in patients with chronic periodontitis poses significant challenges due to compromised periodontal support and alveolar bone loss. Periodontally accelerated osteogenic orthodontics (PAOO) may facilitate tooth movement while promoting bone regeneration in such cases.

Case presentation: A 33-year-old male with chronic periodontitis and severe malocclusion presented for orthodontic correction. Initial treatment included comprehensive periodontal therapy—oral hygiene control, open-flap debridement, and bone grafting—prior to orthodontic intervention. Congenital absence of tooth 12 resulted in mesial drift, and teeth 17, 24, and 27 were extracted due to poor prognosis. Despite initial periodontal improvement, inflammation and labial plate collapse at …

Correction Of Facial Asymmetry Using Bilateral Sagittal Split Osteotomy Combined With Anterior Mandibular Midline Split And Genioplasty, Po-Yu Yang, Chia-Tze Kao, Yi-Chieh Chen, Wen-Ken Tai

Taiwanese Journal of Orthodontics

Facial asymmetry accounts for approximately two-thirds of orthognathic surgical patients and may involve discrepancies in any of the three spatial planes. Conventional bilateral sagittal split osteotomy (BSSO) has limitations in correcting patients with significant discrepancies in bilateral ramus angles. This paper proposes a novel surgical approach for the correction of facial asymmetry using BSSO combined with an anterior midline mandibular split osteotomy and genioplasty.

A 30-year-old woman presented with a skeletal Class III pattern, occlusal canting, and a 3-mm deviation of the chin to the right. Intraoral examination revealed an anterior crossbite, dental midline deviation, and a left Angle’s Class …

An Ai-Assisted Digital Workflow For Clinical Planning And Guide Fabrication In Miniscrew-Assisted Rapid Palatal Expansion, Yu-Chiang Chen, Szu-Ching Lee, Ting-Fen Chang, Wei-Lun Chang, Shu-Cheng Lin, Tzu-Ying Wu

Taiwanese Journal of Orthodontics

Purpose: This article introduces a digital workflow for creating a miniscrew-assisted rapid palatal expander (MARPE) guide, to virtually determine the proper MARPE position and to precisely transfer it into the reality. Materials and Methods: A digital workflow was established by the following steps: (1) generating a digital model with palatal soft tissue from the digital scan, (2) isolating teeth on the digital model from the CBCT file for band size try-in using AI software (DentalSegmentator), (3) constructing a model with four parallel cylinders simulating the MARPE screws’ pathways, (4) superimposing the three models to determine the proper MARPE position, (5) …

To Extract Or Not To Extract: On What Basis Do We Make That Decision? (Part Ii), Ib Leth Nielsen

Taiwanese Journal of Orthodontics

The most common extraction pattern in orthodontic patients with crowding of the teeth is the four first bicuspids. This is usually done in cases with severe crowding or bimaxillary protrusion. In some instances, orthodontists have decided, instead of extracting the first bicuspids, to extract the second bicuspids, for various reasons that we shall discuss in this review. Several other extraction patterns have also been implemented in the past, including second molars, lower incisors, and even asymmetric extractions. In this review, we shall discuss the pros and cons of each of these choices. In some patients, clinicians have even decided to …

Long-Term Follow-Up Of Midface Hypoplasia In A Patient With Cleft Lip And Palate, Jui-Jen Fang, Hui-Ching Yu, Li-Ling Cheng, Yu-Jen Chang

Taiwanese Journal of Orthodontics

Introduction: Severe midface hypoplasia is a common craniofacial deformity in patients with cleft lip and palate (CLP), often linked to functional impairment and esthetic concerns. Although surgical and orthodontic advances have improved outcomes, long-term stability remains challenging. This report presents the management of a bilateral CLP patient and evaluates stability after more than 12 years of follow-up. Diagnosis: A 31-year-old male with bilateral CLP showed a concave facial profile, widened lip scars, reverse overjet of –30 mm, complete crossbite, and missing teeth (12, 22, 36). Palatally displaced premolars (15, 25) produced an hourglass-shaped arch. The diagnosis was skeletal Class III …

Treatment Of Skeletal Class Iii Malocclusion With Spaced Arch And Anterior Crossbite Using Low-Hysteresis Improved Super-Elastic Ti-Ni Alloy Wire (Isw), Szu-Ying Yu, Yuag-Hou Chen, Ching-Yu Yang, Jian-Hong Yu

Taiwanese Journal of Orthodontics

This article presents the orthodontic treatment of a non-surgical, non-growing skeletal Class III malocclusion using an Improved Super-elastic Ti-Ni Alloy Wire (ISW), developed by the Institute of Science Tokyo (formerly Tokyo Medical and Dental University). Teeth 28 and 48 were extracted, and ISW with long Class III intermaxillary elastics (L3–U6) was applied to eliminate anterior occlusal interference, retract the mandible, and induce a clockwise rotation of the mandibular plane. In addition to mandibular space closure, the deviated dental midline and chin asymmetry were corrected using elastic chains and intermaxillary elastics. Proper arch coordination, space management, and midline alignment were achieved, …

Orthodontic Space Closure And Third Molar Uprighting For Simultaneous Maxillary And Mandibular Molar Loss On The Same Side, Chun-Yi Huang, Yuan-Hou Chen, Ching-Yu Yang, Jian-Hong Yu

Taiwanese Journal of Orthodontics

This case report describes the successful non-surgical orthodontic management of a complex Class I malocclusion characterized by unilateral posterior tooth loss and functionally induced facial asymmetry. A 28-year-old male patient presented with a non-restorable maxillary first molar (#26) and a missing mandibular second molar (#37). The resulting occlusal discrepancy contributed to a mandibular functional shift and facial asymmetry. The patient declined prosthetic and surgical options, prompting a conservative orthodontic approach.

The treatment plan incorporated third molar protraction and upright to substitute for the missing second molar, combined with occlusal rehabilitation to correct the asymmetry. Space closure was achieved using elastic …

Nonsurgical Orthodontic Management Of A Severe Skeletal Class Ii Malocclusion Using A Modified Intrusive Arch, Ting-Wei Liu, Chun-Liang Kuo, Chun-Hsiu Yang

Taiwanese Journal of Orthodontics

Treating skeletal Class II malocclusion in non-growing patients remains a significant challenge in contemporary orthodontics. Treatment options range from dental camouflage, often involving extractions, to combined orthodontic–surgical approaches. In this case, orthodontic camouflage with extractions was selected to manage a severe skeletal Class II discrepancy in a 28-year-old female patient. A modified intrusive arch was employed to achieve simultaneous retraction and intrusion of the maxillary anterior teeth, effectively reducing excessive overjet. The biomechanical system of the modified intrusive arch generates an anterior intrusive force, a posterior extrusive force, and a posterior tip-back moment. The combined use of Tip-Edge Plus brackets …

Application Of Improved Super-Elastic Ti-Ni Alloy Wire For The Treatment Of Adult Skeletal Class Ii With Severe Deep Bite, Pin-Yu Chen, Yuan-Hou Chen, Jian-Hong Yu

Taiwanese Journal of Orthodontics

An adult female (26 years old) with a chief complaint of poor dental alignment, deep bite, and maxillary protrusion came for orthodontic evaluation. Clinical examination indicated Class II canine relationship combined with large overbite and overjet and accentuated Curve of Spee. Radiographic examination showed skeletal Class II and lower right first molar missing. Improved Super-elastic Ti-Ni alloy wire (ISW, developed by Institute of Science Tokyo) curve was added over the lower arch to flatten Curve of Spee, and extraction of bilateral upper first premolars with intramaxillary elastics to perform anterior retraction was considered. At the end of treatment, we achieved …

Goal-Oriented Aesthetic Treatment (Goat): A Systematic Framework For Three-Dimensional Facial Aesthetic Assessment — Part 2: Sagittal Dimension, Heng-Ming Chang, Yu-Chun Su, Min-Hsun Hsu, Yu-Ting Lin, Chih-Wei Wang

Taiwanese Journal of Orthodontics

Facial aesthetics is a multidimensional concept that requires an integrative assessment of the sagittal, vertical, and transverse planes to achieve balance and harmony. Following the evaluation of the vertical dimension in Part I, this review focuses on the sagittal plane, which plays a pivotal role in facial profile balance and anteroposterior skeletal relationships. The Goal-Oriented Aesthetic Treatment (GOAT) framework provides a structured methodology for diagnosing and addressing sagittal discrepancies, incorporating clinical reference lines, chin morphology, incisor inclination, and anchorage considerations. A comprehensive assessment of the sagittal dimension involves the use of key diagnostic tools such as the Barcelona Line (BL), …

Goal-Oriented Aesthetic Treatment (Goat): A Systematic Framework For Three-Dimensional Facial Aesthetic Assessment — Part 1: Vertical Dimension, Heng-Ming Chang, Yao Chen, Kwok-Hing Ho, Kai-Long Wang, Chih-Wei Wang

Taiwanese Journal of Orthodontics

Facial aesthetics is a multidimensional concept that requires an integrative assessment of the sagittal, vertical, and transverse planes to achieve balance and harmony. Among these, the vertical dimension plays a crucial role in determining facial proportions, occlusal function, and overall aesthetic perception. This review introduces the Goal-Oriented Aesthetic Treatment (GOAT) framework as a systematic approach to evaluating the vertical aspects of facial aesthetics, providing a structured methodology for clinical assessment and treatment planning. A comprehensive evaluation of the vertical dimension encompasses several key parameters, including facial pattern classification, vertical proportions, lip competency, and overbite analysis. Traditional cephalometric indices, such as …

Predicting Stability And Relapse In Class Iii Patients: The Role Of The Mandibular Plane Angle In Bimaxillary Surgery, Jason Jyun-Cheng Kuo, Min-Chi Chen, Yu-Chih Wang, Ellen Wen-Ching Ko

Taiwanese Journal of Orthodontics

Purpose: Skeletal stability after orthognathic surgery remains challenging in Class III malocclusion. This study examined how preoperative mandibular plane angle (FMA) and its surgical changes affect postoperative outcomes.

Patients and Methods: Sixty adult Taiwanese patients with skeletal Class III malocclusion treated by bimaxillary surgery without genioplasty were retrospectively analyzed. Cone-beam computed tomography (CBCT) at preoperative (T0), immediate postoperative (T1), and orthodontic debonding, ≥ 1-year postoperative (T2) stages was used to measure sagittal (Pog-CP), vertical (Me-FH), and transverse (Go–Go) changes. Pearson correlation and multiple regression analyses were performed.

Results: Smaller preoperative FMA and larger increased intraoperative FMA increases were significantly associated …

Volumetric Analysis And Anatomical Variations Of The Maxillary Sinus: A Cone-Beam Computed Tomography Study, Prafen Pokhrel, Rabindra Man Shrestha, Ujjawal Pyakurel, Roshan Poudel

Taiwanese Journal of Orthodontics

Objectives: The purpose of the study was to determine the volume and to assess the anatomical variations of maxillary sinus using cone-beam computed tomography (CBCT).

Materials and Methods: The study was conducted using 64 CBCT scans of the subjects belonging to the age group 18-50 years. Using Care Stream 3D imaging software, the scans were exported and read in an orthogonal slicing view. The width and length of the sinus were measured in axial section, whereas the height was measured in coronal section. Volume and area of sinus were calculated using 3D Slicer software. The assessment of septa was done …

A Case Of Class Iii Malocclusion With Obstructive Sleep Apnea Treated By Orthodontic Treatment Combined Two-Jaw Orthognathic Surgery, Chao-Yu Lu, Yu-Feng Chen, Yu-Chuan Tseng

Taiwanese Journal of Orthodontics

This case report presents a successful treatment outcome of a 24-year-old male patient who was diagnosed with moderate type of obstructive sleep apnea (OSA) (AHI, 22.8). Cephalometric analysis demonstrates skeletal Class III jaw relation with mandibular prognathism, hyperdivergent facial pattern, Angle’s Class III malocclusion, and anterior cross-bite. Treatment intervention included orthodontic treatment combined with two-jaw orthognathic surgery and genioglossus advancement (GGA). In total treatment period of 14 months, the patient was satisfied with not only the improvement of facial profile and occlusion, but also his sleep quality.

Orthodontic Management Of Angle Class I Malocclusion With Unilateral Mandibular First Molar Loss And Generalized Gingival Recession, Ming-Che Wu, Hsin-Yi Lo, Ming-Ju Lee

Taiwanese Journal of Orthodontics

This case report presents the treatment of Angle Class I malocclusion in a 28-year-old female patient with a missing right mandibular first molar and generalized gingival recession. The treatment plan involved whole-arch distalization in the upper dentition, relief of crowding under the condition of pre-existing gingival recession, space closure of the right mandibular first molar area, with substitution of teeth 47 and 48 for better final occlusion. Anchorage strategies included sequential distalization of upper buccal segment with the aid of temporary anchorage devices before anterior alignment. The closure of the right mandibular first molar space was achieved with uprighting and …

Moving A Maxillary Incisor Across The Midline For Substitution Of Contralateral Missing Incisor In A Multiple Anterior Teeth Missing Patient, Ling-Yu Huang, Chun-Liang Kuo, Chun-Hsiu Yang, Ting-Wei Liu

Taiwanese Journal of Orthodontics

Loss of permanent maxillary incisor causes a significant esthetic problem, and there are various treatment options for rehabilitation. Moving the contralateral tooth across the facial midline for substitution of missing tooth is a possible treatment alternative for closing the maxillary anterior space.

This report presents an unusual treatment for a bimaxillary protrusion patient who typically requires premolar extraction to improve the convex profile. However, due to multiple missing anterior teeth, the left maxillary central incisor was moved across the facial midline to substitute the absent contralateral tooth, resulting in an improved profile after treatment.

The case was an 18-year-old female …

Establishment Of Cephalometric Norms Using Tetragon Analysis In Nepali Adults With Normal Skeletal Relationship, Rashmi Bhattarai, Rabindra Man Shrestha, Jyoti Dhakal

Taiwanese Journal of Orthodontics

Introduction: Cephalometric analysis is a cornerstone in orthodontic diagnosis and treatment planning, enabling precise evaluation of craniofacial structures. Among the various methods, Tetragon analysis offers a unique visual approach to evaluate the maxillo-mandibular relationship. This is based on two geometric constructs, the tetragon representing the maxillo-dento-mandibular complex and the trigon, a complimentary triangle situated above it. Considering the significant genetic and environmental variations in craniofacial development, cephalometric norms established for one population may not be applicable to others.

Objective: This study aimed to establish normative cephalometric values for Tetragon analysis among Nepali adults with normal skeletal relationships.

Materials and Methods: …

Comparative Evaluation Of Trueness And Precision Of Intraoral Scanners For Maxillary Casts In Cleft Lip And Palate: A 3d Study, Rattiya Chuacharoen, Prajak Jariyapongpaiboon, Kaviya Kanokpongsak

Taiwanese Journal of Orthodontics

Objectives: The purpose of this study was to compare the trueness and precision of 5 different intraoral scanning devices in maxillary cleft lip and palate (CLP) models. Material and Methods: One complete unilateral and one complete bilateral CLP model were each scanned by TRIOS E4, a laboratory scanner, and recorded in a standard tessellation language (STL) file as a reference scan. These models were then scanned using five different intraoral machines: TRIOS 4; Straumann Virtuo Vivo; Medit i500; Aoralscan 3; and Panda P2. Each CLP model was scanned 10 times, and the files were saved as test scans. …

Rapid Facial Enhancement Through Surgery-First Approach Correction For Class Iii Bimaxillary Protrusion And Asymmetry, Ting-Ying Wu, Liang-Chia Huang, Yu-Jen Chang

Taiwanese Journal of Orthodontics

The Surgery-First Approach (SFA) prioritizes surgical intervention before orthodontic treatment, offering a transformative strategy for managing dentofacial discrepancies. This innovative approach provides numerous advantages, including immediate enhancements in facial aesthetics, occlusion, and phonetic function while significantly reducing overall treatment duration. SFA is especially beneficial for patients exhibiting specific characteristics, such as well-aligned teeth and minimal occlusal discrepancies. In this case study, a patient presented with persistent facial asymmetry and lip protrusion despite previous orthodontic treatment. After a thorough evaluation, the patient was deemed suitable for SFA, leading to surgical intervention. Postoperative assessments demonstrated marked improvements in facial symmetry, although minor …