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An interdisciplinary approach for the rehabilitation of patients with pathologic tooth movement caused by advanced periodontal disease is presented. The special demands to the orthodontic therapy are illustrated by a case report. The necessity for precise treatment planning and for the use of controlled treatment is demonstrated.
The increase of quality and efficiency in orthodontic treatment is characterized by the development of knowledge based consultations systems. These systems support the dentist to optimate treatment planing. Basis configuration and technical background of those systems are presented.
A practical method for computer aided measurements of orthodontic models is introduced here. Measurements values are taken by using in incremental donor with the traditional slide rule. Advantages of this method lead to a higher efficiency of model measurements.
We have analysed the bases of information about the feasibility of orthodontic photography. After giving details about the photographic equipment and the field lighting we gave a thorough description of the operative modalities of intra and extraoral photos. We have given special emphasis to the framing phase which is of great importance for successful photograms. This is important both for projection and setting together of case display. Eventually the most frequent mistakes are pointed out. A useful dialogue for daily clinical practice is given hereby.
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1. Treatment of Class II, Division 1 malocclusions should be accomplished by normalization of the abnormal structures that are identified diagnostically. 2. In the presence of mandibular retrognathism and unfavorable growth potential (limited amount, undesirable direction), surgical mandibular lengthening should be incorporated into the treatment plan. 3. Compensation for mandibular retrognathism by conventional orthodontic and facial orthopedic treatment incurs the risk of (a) increase in nasolabial angle, (b) reduction in upper lip support, (c) increase in lower facial concavity, (d) excessive proclination of lower incisors with compromise of labial periodontal support, and (e) protracted duration of appliance therapy and accompanying detrimental periodontal and root resorption effects.
IOTN is an index of orthodontic treatment need that has been devised on the basis of the available evidences of the deleterious effects of malocclusion on the aesthetic and health of the dentition. It has two components i.e. an aesthetic component and a dental health component. This index is widely used in epidemiological research and by third party payment for determination of those patients who should benefit from public funding.
This investigation evaluated the effect of setting cut-off points for treatment allocation upon the reliability of the Index of Orthodontic Treatment Need (IOTN). Cut-off points were placed between the grades signifying 'need' and 'moderate need' and between 'need' and 'no need' for treatment. The reliability of each of these dichotomous decisions was evaluated with (i) the Kappa statistic and (ii) the false positive and false negative rates. We found that the reliability was decreased and the false positive rate was increased when the cut-off point was placed between the 'need' and 'moderate need' for treatment levels. The effect of this variation in reliability is discussed.
The Author after having reviewed the causes that in the past have been responsible of the neglecting of mandibular dysfunction in children, points out the need of TMJ evaluation during the orthodontic check-up to this purpose he suggests to employ a screening questionnaire and a clinical examination; further exams would be required only when the diagnosis points out a dysfunction or when the child shows a functional problem or a malocclusion a risk.
This is the first of three reports in a study of the effect of the supra- alveolar soft tissues on orthodontic relapse. A surgical method is presented, the object of which is to remove most of the interdental soft tissues without permanent damage to the gingiva or the other parts of the periodontium. A marginal incision is made buccally and lingually in the gingival sulcus in the area concerned. The edge of the wound is folded away from the teeth with a raspatory (Fig, 2). The portion of the papillae remaining between the teeth is excised (Fig 3). The edges of the wound are approximated with sutures placed interdentally (Fig 4). The surgical wound heals with complete regeneration of the interdental papillae (Figs. 6 and 9).
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Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
OBJECTIVE: To develop a novel mandible slice organ culture model to investigate the effects of externally applied force on the dentine-pulp complex. DESIGN: In vitro organ culture. SETTING: School of Dentistry, Birmingham, UK. MATERIALS AND METHODS: Transverse 2 mm thick sections were cut from the mandibles of five 28-day-old male Wistar rats. Serial sections were used for control and test pairs. Springs made from 0.016-inch and 0.019 x 0.025-inch stainless steel wires were used to apply a 50 g tensile or compressive force, respectively, to test specimens. Control and test specimens were cultured for 5 days in a humidified incubator with 5% CO(2) at 37 degrees C and processed for routine histological investigation. Nine more rats were used to provide control and compression test pairs where the pulps were extirpated after 3 days culture and total RNA isolated for gene expression analysis by reverse transcriptase polymerase chain reaction (RT-PCR). RESULTS: Histology showed the dental and supporting tissues maintained a healthy appearance in the control cultures after culture. Histomorphometric analysis revealed a 20-27% increase in pulp fibroblast density in test specimens compared with controls. Gene expression analyses revealed up-regulation in the test groups of PCNA, c-Myc, Collagen 1alpha, TGF-beta1 and alkaline phosphatase, whilst expression of osteocalcin was reduced. CONCLUSIONS: The results demonstrated that the present organ culture technique provides a valuable in vitro experimental model for studying the effects of externally applied forces. These forces stimulated a cellular response in the pulp chamber characterized by altered gene expression and proliferation of fibroblasts; the latter being unaffected by the nature of the force in terms of compression or tension.