Download or read book Three Dimensional Study to Quantify the Relationship Between Facial Hard and Soft Tissue Movement as a Result of Orthognathic Surgery written by Anas Mohammed Yousif Almukhtar and published by . This book was released on 2016 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determining The Relationship Between Hard and Soft Tissue Movements in Orthognathic Surgery Patients Using Multiple Imaging Modalities written by Nicholas Emanuele and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Orthognathic surgery encompasses various surgical procedures used for the correction of dentofacial deformities from malocclusions, prognathism, retrognathism, obstructive sleep apnea, to TMJ disorders and others. While the primary objective of orthognathic surgery is to optimize the occlusion and improve overall masticatory function, enhancement of the facial aesthetics is also an outcome of concern. However, tissue manipulation can result in unpredictable and sometimes, unfavorable outcomes. Thus, it is important to understand the impact hard tissue movement has on the soft tissue. Purpose: The primary outcome of this study was to determine the hard to soft tissue ratio following orthognathic surgery. Secondary outcomes focused on evaluating changes in soft tissue. Methods: Pre and post-operative cone beam computed tomography (CBCT) scans were taken prior to surgery and between 2 and 4 weeks post-operatively. 3D Photos were captured pre-operatively and at 3-months, 6-months and 12-months post-operatively. Image analysis was done using Dolphin® software. Three separate analysis were done: the magnitude of bony movement (HT), comparing hard to soft tissue movement (HT: ST), and changes in soft tissues (ST). The primary and secondary outcomes were then evaluated using these analyses stratified by time, sex, procedure type, age and BMI. Both a Wilcoxon signed-rank test and a regression model fit were used to evaluate the data. All patients planned for orthognathic surgery at Dalhousie University were screened and enrolled if they met the inclusion criteria. Results: 12 total patients completed the 12-month follow up, 19 patients completed the 6-month follow up and 44 patients completed the 3-month follow up. There were 3 treatment groups: LF, BSSO and LF BSSO. There was no statistically significant change in the HT: ST ratio at 12-months post-operatively. There was a trend in the data that showed maximal increase in the HT: ST ratio at 6 months (1: 1.53, n=19, p=0.38), however it was not statistically significant. The nasolabial angle showed the greatest change with maxillary surgery (2.56mm, n=7, p=0.03) and in males (1.45mm, n=17, p=0.04). The mentolabial angle changed more in patients in the BSSO treatment group (5.08mm, n=11, p=0.03). The alar width increased after surgery (2.58mm, n=14, p=0.001), with the greatest changes in the LF treatment group (1.77mm, n=14, p=0.06). There were no significant differences seen in the mouth width, height of philtrum, and upper and lower lip thicknesses. Conclusion: The hard to soft tissue ratio does not change significantly 12-months post-surgery. Minor soft tissue changes were seen at the level of the nasolabial angle, mentolabial angle and the alar width. The patient attrition rate was significant in this study, and the study findings should be interpreted accordingly.
Download or read book Three Dimensional Assessment of Facial Deformities and Their Surgical Outcomes written by Yasas Shri Nalaka Jayaratne and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Three-dimensional Assessment of Facial Deformities and Their Surgical Outcomes" by Yasas Shri Nalaka, Jayaratne, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Data on the three?dimensional (3?D) morphology of normal faces and facial deformities as well as objective techniques for evaluating postoperative changes are currently unavailable. With the advent of stereophotography and cone?beam CT (CBCT), it is possible to acquire 3?D images of soft and hard tissues of the maxillofacial complex. A series of studies were conducted aimed at 1) establishing 3?D facial anthropometric norms for Hong Kong young adults, 2) determining 3?D facial anthropometric features in skeletal Class II and III deformities, 3) characterizing the oropharyngeal space in Class II and III skeletal deformities, 4) exploring clinical applications of 3?D colour maps, 5) establishing a non?invasive technique for estimating serial volume changes and 6) creating virtual craniofacial models by fusing 3?D photographs and CBCT images. Study 1: A stereophotographic system was used to capture 3?D images of 103 Hong Kong Chinese young adults with normal balanced faces. An anthropometric analysis protocol with linear, angular and proportional measurements was developed to establish a normative database and quantify dysmorphology. The Hong Kong Chinese norms were distinct from Caucasians, especially with regard to ocular and nasal measurements. Facial height and nasolabial measurements differed significantly between Hong Kong males and females. Study 2: Anthropometric analyses of 3?D facial images from 41 skeletal Class II and 43 Class III subjects were performed. The Class II subjects had increased lower facial height compared with Class III, who had longer total facial heights and narrower faces. While Class II deformity primarily resulted from mandibular deficiency with a normal maxilla, Class III presented as combined midfacial hypoplasia and mandibular hyperplasia. Study 3: Anthropometric characteristics of the oropharygeal space in skeletal Class II and III were evaluated using 62 CBCT scans. The retroglossal (RG) and retropalatal (RP) volumes and average cross sectional areas were significantly larger in Class III than Class II skeletal deformity. The RP compartment was larger but less uniform than the RG compartment in both Classes. Study 4: 3?D photographs or CBCT images acquired at two different time points were superimposed using a common unaffected area. 3?D colour maps were generated depicting distance differences between superimposed images in a graphical format. These maps were used as an objective tool for treatment planning and assessing outcomes after orthognathic surgery, bimaxillary distraction and facial trauma. Study 5: 3?D photogrammetry was employed for planning soft tissue expansion (STE) and transplantation of a vascularised scapular flap in hemifacial microsomia. This technique facilitated the identification of extent and degree of tissue deficiency, selection of the appropriate tissue expander, monitoring volumetric changes during STE and estimation of the free flap dimensions. Study 6: 3?D facial photographs and CBCT scans of 29 subjects were merged to create virtual craniofacial models with natural surface texture. Accuracy was assessed with 3?D
Download or read book 3D Soft tissue 2D Hard tissue and Psychosocial Chantes Following Orthognathic Surgery written by Mohammad Younis Hajeer and published by . This book was released on 2003 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long Term 3 D Assessment of Facial Asymmetry After Orthognathic Surgery written by Himank Gupta and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Objectives: The objective of this study was to find out if the soft tissue changes after the correction of dentofacial asymmetry with orthognathic surgery will tend to regress to the original deformity. Materials and Methods: A total of 20 patients were recruited in this retrospective study which was performed at Yale New Haven Hospital and University of Connecticut. Patients were divided into two groups: Experimental (8) and Control (12). Stereophotogrammetric Images were obtained for each patient at five timepoints: (T0) Pre-Surgery, (T1) Post-surgery, (T2) 1 month after, (T3) 6 months after, (T4) 1-year after. Fifteen landmarks were identified on faces of each patient at each timepoint. Each landmark had its own of X, Y, and Z coordinates. The coordinates of each timepoint were then compared within each group and between groups. Results: Statistically significant differences were found for points in the lower chin area (Point 10, 11, 12 and 15) in the transverse plane (X-axis) for experimental patients between T0 and T1. Control patients had statistically significant changes in the transverse plane for Points 1 and 15 when comparing T0 and T1. All the bilateral points in our study were separately analyzed for their vertical (Y) and anterior-posterior (Z) changes over time. For vertical changes in the experimental group, Points 13 and 14 had a statistically significant difference before surgery and at 1-month post-surgery when compared to each other. For vertical changes in the Control group, comparison between Points 8 and 9 at 6-month timepoint were statistically significant. When analyzing changes in anterior-posterior direction, we did not see any statistically significant differences in our Experimental group. However, in the Control group, Points 13 and 14 were statistically significant different at Pre-Surgery, 1-month and 6-months for the Z values. Conclusions: Our data suggests that asymmetry improved significantly after surgery for all the lower chin points in the Experimental group after orthognathic surgery when compared to patients in the Control group. Since we did not see any significant changes occurring post-surgery for the lower chin points in the experimental group, we conclude that the asymmetry of the chin does not regress over time back to its original location in asymmetric patients. No other clinically significant results were observed in this study.
Download or read book Oral and Maxillofacial Surgery for the Clinician written by Krishnamurthy Bonanthaya and published by Springer Nature. This book was released on 2021 with total page 1965 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an open access book with CC BY 4.0 license. This comprehensive open access textbook provides a comprehensive coverage of principles and practice of oral and maxillofacial surgery. With a range of topics starting from routine dentoalveolar surgery to advanced and complex surgical procedures, this volume is a meaningful combination of text and illustrations including clinical photos, radiographs, and videos. It provides guidance on evidence-based practices in context to existing protocols, guidelines and recommendations to help readers deal with most clinical scenarios in their daily surgical work. This multidisciplinary textbook is meant for postgraduate trainees, young practicing oral surgeons and experienced clinicians, as well as those preparing for university and board certification exams. It also aids in decision-making, the implementation of treatment plans and the management of complications that may arise. This book is an initiative of Association of Oral and Maxillofacial Surgeons of India (AOMSI) to its commitment to academic medicine. As part of this commitment, this textbook is in open access to help ensure widest possible dissemination to readers across the world. ; Open access Unique presentation with contents divided into color-coded core competency gradations Covers all aspects of oral and maxillofacial surgery Supplemented with videos of all commonly carried out procedures as operative video Every chapter or topic concludes with "future perspective" and addresses cutting edge advances in each area Every topic has a pull out box that provides the most relevant systematic reviews/ key articles to every topic.
Download or read book Rapid Maxillary Expansion written by Donald J. Timms and published by . This book was released on 1981 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Soft Tissue Changes in Bimaxillary Orthognathic Surgery written by 莫品芸 and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Depression written by Mark A. Reinecke PhD and published by Springer Publishing Company. This book was released on 2007-01-29 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprehensively compares and contrasts alternative models of, and treatment approaches to, clinical depression. Each contributor, a recognized expert in his or her modality, analyzes the same case and provides: an overview of the treatment model empirical evidence for both the model and treatment derived from it treatment strategies and interventions, including termination issues, relapse prevention, and recommendations for follow-up care Among the 12 approaches presented are Object Relations, Cognitive Therapies, Schema-Focused, Couple and Family, Integrative Psychotherapy, and Psychopharmacology. A significant contribution to this volume is the chapter on cultural considerations for understanding, assessing, and treating depression.
Download or read book Current Concept in Cleft Surgery written by Rafael Denadai and published by Springer Nature. This book was released on 2022-11-15 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book intends to cover cleft-related topics which are mainly focused on the current concept of balancing excellence in outcome and burden of cleft care. The wide spectrum of covered topics includes the understanding challenges and needs to deliver the modern surgical cleft care worldwide and comprehending multidisciplinary-based longitudinal life-changing concept. The chapters are focused on professional-friendly technical descriptions from diagnosis to execution such as nasoalveolar molding, cleft lip repair, cleft palate repair, myringotomy tube insertion, primary and secondary rhinoplasties, oronasal fistula reconstruction, velopharyngeal insufficiency management, virtual-aided alveolar reconstruction, surgery-first approach in cleft orthognathic surgery, 3D computer-assisted orthognathic surgery, revisionary surgeries, and postoperative care. Traditional and current principle-based methods are itemized into many algorithms and protocols to aid in diagnosing, planning, and selecting the best therapeutic approach in order to balance excellence in outcome and burden of care. Many surgical-, orthodontic-, speech-, and postoperative care-related technical examples, intraoperative photos, and full-colour illustrative drawings can guide the professionals working in multidisciplinary teams through each traditional and newer hybrid operative procedure in a detailed step-by-step fashion with emphasis on how to perform each procedure, rather than on theoretical-only descriptions. This book provides time- and scientifically-tested treatment algorithms to guide multidisciplinary teams during decision making process for each clinical scenario of the longitudinal cleft care
Download or read book Esthetics and Biomechanics in Orthodontics E Book written by Ravindra Nanda and published by Elsevier Health Sciences. This book was released on 2012-05-07 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Esthetics and Biomechanics in Orthodontics, 2nd Edition provides everything you need to know to successfully apply biomechanics in clinical orthodontics. This edition features new content in the areas of tooth movement, treating Class III malocclusions, skeletal anchorage, Surgery First treatment plans, and space closure. In addition to comprehensive guidance on basic biomechanic principles, this state-of-the-art reference also shows how all techniques can apply biomechanical principles to improve the force delivery, understand and prevent side effects, and achieve predictable results. Highly regarded lead author, Dr. Ravindra Nanda, is a widely known and respected educator in the field of orthodontics. Comprehensive coverage of diagnosis, treatment planning, and esthetics in tooth display provides a solid foundation in orthodontia and biomechanic problem solving. Case reports include high-quality photographs, radiographs, and illustrations to better show biomechanical principles. Radiographs and line drawings accompany clinical photographs to help illustrate the various stages of treatment. NEW! Content on the fundamentals that guide orthodontic tooth movement offers a clear understanding of how orthodontic appliances work and their role in designing treatment methodologies. NEW! Content on procedures and indications for optimal space closure helps you define priorities in treatment planning and understand all the treatment alternatives. NEW! Detailed information on biomechanics-based management of impacted canines provides treatment planning strategies and biomechanic techniques to achieve desired results without increasing treatment time. NEW! Coverage on modalities for the treatment of Class III malocclusions offers insight into new treatment protocols — such as corticotomy-assisted facemask therapy and corticotomy-assisted maxillary protraction — that are available to effectively treat these occurrences. NEW! Detailed information on the different forms of skeletal anchorage (including mini-implant technology) shows how certain challenges associated with types of tooth movement can now be overcome by applying sound biomechanical principles to skeletal anchorage. NEW! In-depth coverage of the Surgery First (SF) treatment plan offers step-by-step examples to help explain the technique of Sendai SF and its benefits
Download or read book Esthetic Orthodontics and Orthognathic Surgery written by David M. Sarver and published by . This book was released on 1998 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. Facial Analysis and the Facial Esthetic Problem List: Coordination of Facial Analysis with the Skeletal and Dental Components 2. The Technology and Mechanics of Videocephalometrics 3. Videocephalometric Treatment Prediction 4. Skeletal and Soft Tissue Facial Changes in Youths, Adolescents, and Adults 5. Esthetic Orthognathic Surgery: The Lower Face 6. Esthetic Orthognathic Surgery: The Mid and Upper Face 7. Issues in Clinical Practice.
Download or read book 3 D Imaging Technologies in Facial Plastic Surgery An Issue of Facial Plastic Surgery Clinics written by John Pallanch and published by Elsevier Health Sciences. This book was released on 2011-11-28 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: A global pool of surgeons and researchers using 3-dimensional imaging for facial plastic surgery present topics on: Image fusion in pre-operative planning; The use of 3D imaging tools including stereolithographic modeling and intraoperative navigation for maxillo-mandibular and complex orbital reconstruction; Custom-made, three-dimensional, intraoperative surgical guides for nasal reconstruction; The benefits and limits of using an integrated 3D virtual approach for maxillofacial surgery; 3D volume assessment techniques and computer-aided design and manufacturing for pre-operative fabrication of implants in head and neck reconstruction; A comparison of different new 3D imaging technologies in facial plastic surgery; 3-D photography in the objective analysis of volume augmentation including fat augmentation and dermal fillers; Assessment of different rhinoplasty techniques by overlay of before and after 3D images; 3D volumetric analysis of combined facial lifting and volumizing (volume enhancement); 3-D facial measurements and perceptions of attractiveness; Teaching 3-D sculpting to Facial Plastic Surgeons, 3-D insights on aesthetics; Creation of the virtual patient for the study of facial morphology; 3-dimensional video analysis of facial movement; 3D modeling of the behavior of facial soft tissues for understanding facial plastic surgery interventions.
Download or read book Peterson s Principles of Oral and Maxillofacial Surgery written by Larry J. Peterson and published by PMPH-USA. This book was released on 2012 with total page 1686 pages. Available in PDF, EPUB and Kindle. Book excerpt: Peterson's Principles of Oral and Maxillofacial Surgery, Third Edition, encompasses a wide range of diverse topics making it a unique text amongst the medical and dental specialties. The purpose of this concise, easy-to-read two-volume text is to provide an authoritative and currently referenced survey of the specialty of Oral and Maxillofacial Surgery. It contains the necessary information for clinicians and is an ideal reference text for preparation for board certification in the specialty.
Download or read book Current Controversies in Orthodontics written by Birte Melsen and published by Chicago : Quintessence Publishing Company. This book was released on 1991 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected experts evaluate the present state of the art in several areas of orthodontics, differentiating between mere convention and fact supported by scientific studies. From lingual orthodontics to rigid fixation for orthognathic surgery, this book provides much-needed information on how controversies within orthodontics are shaping the future of the field.
Download or read book Contemporary Treatment of Dentofacial Deformity written by William R. Proffit and published by . This book was released on 2003 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new full-color reference and textbook on orthodontics and orthognathic surgery includes the latest content on surgical orthodontic techniques. Presenting the most comprehensive and sophisticated information available, it explores the integrated orthodontic and surgical management of patients with dentofacial deformity. Includes an entire section on diagnosis and treatment planning - with a strong emphasis on the diagnosis of soft tissue problems. Explains methods for treating certain dentofacial deformities with distraction osteogenesis. Provides current information on integrated treatment, where the orthodontist, the oral and maxillofacial surgeon, and/or the plastic surgeon work as a team to achieve the ideal result for each patient. Discusses the newest computer technology for prediction/imaging techniques to view the probable "after" results before treatment ever begins. Includes up-to-date content on surgical complications and how to manage these problems. Real-life case studies visually take the reader from pre-treatment to post-treatment for the many techniques taught in the book. Provides content on adolescent growth and its relation to orthodontic treatment, maturational changes, and the treatment of asymmetric facial deformities with surgery and orthodontics. Includes colorful cephalometric tracings to illustrate the before-and-after results of surgery. Pre- and post-surgery cephalometric radiographs show the changes to the structures of the face and jaws. Full-color images bring the tangible results of orthodontic and oral surgery treatment to life.
Download or read book The Surgery First Orthognathic Approach written by Jong-Woo Choi and published by Springer Nature. This book was released on 2021-01-20 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive guide to the surgery-first orthognathic approach for patients with malocclusion and skeletal disharmony, which has been successfully applied by the authors in their practices over the past 15 years. The approach breaks with the time-tested principles of traditional orthognathic surgery in that corrective bone surgery is performed first, without the removal of dental compensations, followed by orthodontic finishing. All aspects are covered with the aid of numerous illustrations, the aim being to provide surgeons with a systematic educational tool that will enable them to introduce the approach into their own practice. In addition, the book addresses one of the hot issues in orthodontics, occlusal plane-altering orthognathic surgery, in which surgical modification of the occlusal plane is employed to treat various types of dentofacial deformity and improve facial proportions. This promises to become a very powerful tool in modern orthognathic surgery.
