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An evaluation of changes in mandibular anterior alignment from 10 to 20 years postretentionPublicado por: American Journal of Orthodontics and Dentofacial Orthopedics
Pretreatment, end of treatment, IO-year postretention, and 20-year postretention records of 31 four premolar extraction cases were assessed to evaluate stability and relapse of mandibular anterior alignment. Crowding continued to increase during the lo- to 20-year postretention phase but to a lesser degree than from the end of retention to 10 years postretention. Only 10% of the cases were judged to have clinically acceptable mandibular alignment at the last stage of diagnostic records. Cases responded in a diverse unpredictable manner with no apparent predictors of future success when considering pretreatment records or the treated results. postretention, robert m little, premolar extraction, evaluation of changes, mandibular anterior alignment |
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ORTHODONTICS and ‘THE PINOCCHIO FACTOR’Publicado por: Dr Robert Cerny, BDS, MDSc. Specialist Orthodontist.
When Pinocchio lies, his nose grows longer... Applying the Pinocchio factor to orthodontics, how long would its nose be today? Author: Dr Robert Cerny ‘laws of orthodontics, dr robert cerny, pinocchio factor, orthodontic literature |
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Influence of Pre-Orthodontic Trainer treatment on the perioral and masticatory muscles in patients with Class II division 1 malocclusionPublicado por: European Journal of Orthodontics The aim of this follow-up study was to evaluate the effects of Pre-Orthodontic Trainer (POT) appliance on the anterior temporal, mental, orbicularis oris, and masseter muscles through electromyography (EMG) evaluations in subjects with Class II division 1 malocclusion and incompetent lips. Authors: Tancan Uysal, Ahmet Yagci, Sadik Kara and Sukru Okkesim malocclusion, perioral and masticatory muscles, class II division 1, pre-orthodontic |
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Application of functional orthodontic appliances to treatment of “mandibular retrusion syndrome"Publicado por: Japanese Journal of Clinical Dentistry for Children There have recently been an increasing number of parents complaining of their children’s health-related problems other than caries, such as decline in exercise ability, open-mouth posture, slow eating, allergy and misaligned teeth. Indeed, studies have shown increases in the number of children with difficulty masticating hard chewy food or inability to swallow correctly. Authors: Akira Kanao, Masanori Mashiko and Kosho Kanao maxillary protrusion, mandibular retrusion syndrome, misaligned teeth, functional orthodontic appliances |
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Orthodontic intervention in the early mixed dentition: A prospective, controlled study on the effects of the eruption guidance appliancePublicado por: American Journal of Orthodontics and Dentofacial Orthopedics A prospective, controlled cohort study was started in 1998 to investigate the effects of orthodontic treatment in the early mixed dentition with the eruption guidance appliance. Authors: Katri Keski-Nisula, Riitta Hernesniemi, Maritta Heiskanen, Leo Keski-Nisula, and Juha Varrelae controlled study, intervention, early mixed dentition, eruption guidance appliance |
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Prevalence of malocclusion and orthodontic treatment need in children and adolescents in Bogota, Columbia.Publicado por: European Journal of Orthodontics The aim of the study was to assess the prevalence of malocclusion in a population of Bogotanian children and adolescents in terms of different degrees of severity in relation to sex and specific stages of dental development, in order to evaluate the need for orthodontic treatment in this part of Colombia. Authors: Birgit Thilander, Lucia Pena, Clementina Infante, Sara Stella Parada and Clara de Mayorga malocclusion, orthodontic treatment, colombia, epidemiological study |
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Prevalence and distribution by gender of occlusal characteristics in a sample of Italian secondary school students: a cross-sectional studyPublicado por: European Journal of Orthodontics The aim of this study was to describe the prevalence and distribution, by gender, of occlusal traits in a sample of Italian students aged 11–14 years (mean 13 ± 1 years). Using standardized and validated recording criteria, a single operator measured the overjet, overbite, open bite, anterior and posterior crossbites, crowding, coincidence of the upper and lower midlines, and diastema, in 810 secondary school students (53.6 per cent males). Authors: Fabio Ciuffolo, Lamberto Manzoli, Michele D’Attilio, Simona Tecco, Filippo Muratore, Felice Festa and Ferdinando Romano cross-sectional study, gender, secondary school students, occlusal characteristics |
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Non-invasive 3D facial analysis and surface electromyography during functional pre-orthodontic therapy: a preliminary reportPublicado por: Journal of Applied Oral Science OBJECTIVES: Functional orthodontic devices can modify oral function thus permitting more adequate growth processes. The assessment of their effects should include both facial morphology and muscle function. This preliminary study investigated whether a preformed functional orthodontic device could induce variations in facial morphology and function along with correction of oral dysfunction in a group of orthodontic patients in the mixed and early permanent dentitions. Authors: Gianluca M. Tartaglia, Gaia Grandi, Fabrizio Mian, Chiarella Sforza and Virgilio F. Ferrario pre-orthodontic therapy, 3d facial analysis, non-invasive, surface electromyography |
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The effects of myofunctional appliance treatment on the perioral and masticatory muscles in class II, division 1 patientsPublicado por: World Journal of Orthodontics This study aims to evaluate the effect of a myofunctional appliance - the pre-orthodontic trainer (POT) - on the perioral and masticatory muscles by electromyography (EMG) in individuals with an Angle Class II, Division 1 malocclusion. Authors: Ahmet Yagci, Tancan Uysal, Sadik Kara and Sukru Okkesim. germàn o. ramirez-yañez, perioral and masticatory muscles, myofunctional appliance, class I, division 1 |
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The Trainer System™ in the context of treating malocclusionsPublicado por: Ortho Tribune (August/September 2009) Functional Maxillary Orthopedics (FMO) is the subject in dentistry studying the treatment of malocclusions by stimulating or inhiiting the activity of the masticatory and/or facial muscles, as well as jaws development, and through that action, to stimulate modelling and remodeling of the maxillaries permitting a better tooth alignment. Author: Dr Germàn O. Ramirez-Yañez trainer system, german ramirez-yañez, functional maxillary orthopedics, treating malocclusions |
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The key to facial beauty and optimal patient health - two part seriesPublicado por: Australasian Dental Practice We require five patterns to optimise healthy growth of the jaws and face which include the lips together at rest; teeth in or near contact; the tongue resting in the roof of the mouth; breathing through the nose; and no muscle movement around the mouth on the subconscious swallow. Research shows that much of the orthodontic treatment used to correct the position of the teeth will further lengthen the face. It is also known that lengthening the face will produce a less attractive face. Author: Dr John Flutter, BDS john flutter, subconscious swallow, facial beauty, optimal patient health |
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The Effects of Early Preorthodontic Trainer Treatment on Class II, Division 1 PatientsPublicado por: Angle Orthodontist The aim of this study was to clarify the dentoskeletal treatment effects induced by a preorthodontic trainer appliance treatment on Class II, division 1 cases. Twenty patients (10 girls and 10 boys, mean age 9.6 6 1.3 years) with a Class II, division 1 malocclusion were treated with preorthodontic trainer appliances (Myofunctional Research Co., Queensland, Australia). Authors: Serdar Usumez, Tancan Uysal, Zafer Sari, Faruk Ayhan Basciftci, Ali Ihya Karaman and Enis Guray malocclusion, class II division 1, pre-orthodontic trainer, dentoskeletal treatment |
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Early Treatment of a Class II, Division 2 Malocclusion with the TRAINER for Kids (T4K™): A Case ReportPublicado por: The Journal of Clinical Pediatric Dentistry
This paper reports a Class II, division 2 malocclusion case successfully treated at an early age and in a relatively short period of time using the Trainer for Kids (T4K™), Authors: German O Ramirez-Yañez, Paulo Faria malocclusion, early treatment, t4k, case report, class II division 2 |
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Combining Functional and Fixed Appliances to Improve Results in Open Bite TreatmentPublicado por: The American Association for Functional Orthodontics Open bite is one of the most challenging malocclusions and its treatment must aim to improve occlusion and muscular function in the masticatory system, producing a satisfactory and stable result. This clinical report presents a patient with an open bite in mixed dentition associated with a Class II, division 1 malocclusion and a posterior unilateral crossbite. By combining functional and fixed appliances, the open bite was closed, a good occlusion was reinstated and muscular activity was improved in a simpler way. Author: Dr. German O.Ramirez-Yañez germàn o ramirez-yañez, open bite treatment, combining functional, fixed appliances |
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Soft Tissue Dysfunction: a Missing Clue when Treating MalocclusionsPublicado por: International Journal of Jaw Functional Orthopedics (2005) Contemporaneous treatment of malocclusions concerns about the effect of the muscular activity in the occlusion. Treatment of malocclusion involves dental alignment, jaw repositioning, stabilization of the activity of the masticatory muscles, the muscles of the tongue and the muscles of the cheeks and lips in order to achieve a balance between the forces delivered on the arches and teeth by all the muscles involved in oral functions. Authors: Dr German O. Ramirez-Yañez & Dr Chris Farrell malocclusion, germàn o ramirez-yañez, soft tissue dysfunction, muscular activity, dental alignmen |
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Influence of growth hormone on the craniofacial complex of transgenic micePublicado por: The European Journal of Orthodontics Growth hormone (GH) secretion affects bone and cartilage physiology. This study investigated the effect of GH on the size of the craniofacial structures and their angular relationship. Three different models of mice with a genetically altered GH axis were used: GH excess (giant), dwarf GH antagonist (dwarf-Ant), and dwarf GH receptor knockout (dwarf-KO) mice. Authors: German Omar Ramirez-Yañez, Joseph R. Smid, William George Young and Michael J. Waters growth hormone, transgenic mice, bone and cartilage physiology, craniofacial complex |
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Periodontal treatment needs in a native island community in Colombia determined with CPITNPublicado por: International Dental Journal (2004) Aims: To identify the prevalence and different degrees of periodontal disease in an isolated community (Isla Grande, Colombia) with no dental services and low educational level with the use of CPITN, and to establish periodontal treatment needs in different age groups. Authors: A.H. Orozco, A.M. Franco and G.O. Ramirez-Yañez colombia, cpitn, periodontal treatment, native island community |
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Incisor disocclusion in rats affects mandibular condylar cartilage at the cellular levelPublicado por: Archives of Oral Biology The effect of altered occlusion on the mandibular condylar cartilage remains unclear. This study investigated the effect of unilateral incisor disocclusion on cartilage thickness, on mitotic activity and on chondrocytes maturation and differentiation in the mandibular condylar cartilage of rats. Author: G.O. Ramirez-Yañez, T.J. Daley, A.L. Symons and W.G. Young germàn o ramirez-yañez, mandibular condylar cartilage, cellular level, Incisor disocclusion |
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Influence of Growth Hormone on the Mandibular Condylar Cartilage of RatsPublicado por: Archives of Oral Biology (2004) Growth hormone (GH) stimulates mandibular growth but its effect on the mandibular condylar cartilage is not well understood. This study was designed to understand the influence of GH on mitotic activity and on chondrocytes maturation. The effect of GH on cartilage thickness was also determined. Authors: Germàn O. Ramirez-Yañez, William G. Younga, Terry J. Daleya and Michael J. Waters germàn o ramirez-yañez, growth hormone, mandibular condylar cartilage, human craniofacial growth |
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The Mandibular Condylar Cartilage: a ReviewPublicado por: International Journal of Jaw Functional Orthopedics (2004) The condylar cartilage is the most important growing site in the mandible. This does not deny that other areas play an important role in mandibular growth, and influence the amount and direction of that growth. However, the condylar cartilage is responsible for the final length of the mandible. The purpose of this paper is to review the actual knowledge about the physiology of the mandibular condylar cartilage and how this cartilage responds to extrinsic and intrinsic stimulus. Author: Dr. German O. Ramirez-Yañez germàn o ramirez-yañez, intrinsic stimulus, mandibular growth, condylar cartilage |
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Growth Hormone and Epidermal Growth Factor in Salivary Glands of Giant and Dwarf Transgenic MicePublicado por: Journal of Histochemistry & Cytochemistry Epidermal growth factor (EGF) in rat salivary glands is regulated by testosterone, thyroxin, and growth hormone (GH). Salivary glands of 45-day-old giant and dwarf male and female transgenic mice were examined histologically and by immunohistochemistry (IHC) for EGF. Male giants showed no significant differences from wild-type (WT) parotid and submandibular glands. Authors: William G. Young, German O. Ramirez-Yañez, Terry J. Daley, Joseph R. Smid, Karen T. Coshigano, John J. Kopchick, and Michael J. Waters germàn o ramirez-yañez, growth hormone, william g young, salivary glands, epidermal growth factor, dwarf transgenic mice |
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Planas Direct Tracks for Early Crossbite CorrectionPublicado por: Journal of Clinical Orthodontics This article describes the use of composite inclined planes called Planas Direct Tracks (PDTs) to correct more complex cases of crossbite in the deciduous dentition. PDTs should be used in the deciduous dentition only, as they cover the occlusal surfaces of the molars, resulting in a flat posterior occlusion until the molars are exfoliated. Author: Dr. German O. Ramirez-Yañez dr german ramirez-yañez, planas, early crossbite correction |
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Condylar Fracture: Nontreatment Case Followed Over 23 YearsPublicado por: World Journal of Orthodontics This article describes a case of early mandibular condylar fracture in a female patient. Follow-up visits over about 23 years without treatment showed completely re-stabilized anatomy and function after the pubertal growth spurt. Temporary ankylosis and lack of growth with severe deviation and facial asymmetry had been initially observed. The management philosophy of pediatric condylar fractures is discussed and a conservative approach is suggested for such cases. Authors: German Omar Ramirez-Yañez, Phillip James Saxby and William George Young |
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Early Myofunctional Approach to Skeletal Class IIPublicado por: Mondo Ortodontico
Therapy aimed at skeletal Class II subjects is carried out at the Odontology Clinic of Milan University in accordance with studies conducted by Petrovic and Stutzmann Authors: C. Quadrelli, M. Gheorgiu, C. Marchetti, V. Ghiglione early treatment, soft tissue dysfunction, skeletal class ii, mondo ortodontico |
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Dental Arches Expansion With Ortho-SystemPublicado por: Dental Asia (March/April 2006) Maxillary and mandibular expansion has been proposed to increase the arch perimeter and to avoid extractions during orthodontic treatment. This paper describes a novel method to produce expansion of the dental arches, and at the same time, to treat muscular dysfunctions which may be the etiological factor of the malocclusion. Two cases treated with the Ortho-System are described and the advantage of this method of treatment is discussed. Authors: Dr German O. Ramirez-Yañez & Dr Chris Farrell dr chris farrell, dr german ramirez-yañez, dental asia, avoid extractions, maxillary and mandibular expansion, treating muscular dysfunctions |
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Dimensional Changes in Dental Arches After Treatment with a Prefabricated Functional AppliancePublicado por: The Journal of Pediatric Dentistry The purpose of this study was to determine the effect of the T4K, a prefabricated functional appliance, on the transverse and anterior-height dimensions of the maxillary and mandibular dental arches. Dimensions before and after treatment were measured on the sample, then, natural growth was subtracted from the treatment effects and compared with twice the error of the method. A clinically significant increase of both dimensions was observed in the maxilla and mandible when Class II malocclusion patients were treated with the T4K. Therefore, this retrospective study demonstrates that T4K is a valid treatment choice at an early age when transverse expansion is part of the treatment goal. Authors: G Ramirez-Yañez, A Sidlauskas, E Junior and J Flutter dr german ramirez-yañez, functional appliance, dentofacial orthopedics, journal of pediatric dentistry, jopd, transverse expansion |
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Insights Into Orthodontic TreatmentPublicado por: Dental Asia (July/August 2006) Almost a century was necessary to find some new alternatives for orthodontic treatment. Since the introduction of brackets, the most significant change in orthodontic industry has been moving from weld brackets to resin bonded brackets and some improvements in wires features. However, the philosophy of treatment did not change as the only purpose of treatment was to move teeth and to expect that the whole oral system might adapt to the performed changes. Author: Dr. German O. Ramirez-Yañez orthodontic treatment, dr german ramirez-yañez, trainer system™, dental asia |
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