[Current theories on adjustment of dental occlusion].
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Patterns of geographic microdifferentiation for dental occlusion and the size and shape of the dental arches are described for 14 villages on Bougainville Island, Papua New Guinea. Occlusal variables, such as overjet, overbite, molar relationships, crowding or spacing, and malalignment vary less among villages than do arch length and width. Arch length and width decrease in size from north to south. The pattern of biological distance among villages for occlusal variables and arch size correspond poorly to anthropometric, linguistic, geographic and migrational distances. The value of occlusal variables and arch size for discriminating among populations, the biological interpretation of multivariate data and the objectives of research on geographic microdifferentiation are discussed.
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A well established premise in the field of craniomandibular and cervical spine orthopedics is that forward head posture (FHP) adversely affects mandibular position and therefore dental occlusion. The purpose of this study was to investigate the influence of FHP on the initial occlusal contact pattern (IOCP) in order to provide further clarification on this important topic. Thirty-nine healthy subjects, 10-74 years old, underwent a series of tests in which the IOCP was recorded in four different head positions using the T-Scan Occlusal Diagnostic System. Three tests each were performed in military posture (MP), natural sitting posture (NP), FHP, and maximal forward head posture (MFHP) for a total of twelve trials. A repeated measures analysis of variance failed to demonstrate a correlation between FHP and IOCP; however, a multiple linear regression analysis revealed a relationship between age and the IOCP. This study raises questions about the relationship between FHP and occlusion.
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BACKGROUND: Sucking habits are related to malocclusion. AIM: To evaluate the effect of a counseling interview about inhibiting this oral habit and, its influence on dental occlusion and labial-lingual posture. METHOD: 40 children (mean age = three years), with a sucking habit and anterior open bite, received counseling aiming for the interruption of this habit. Measurements of the open bite were made, as well as a myofunctional evaluation, prior to counseling and, three and six months after it. RESULTS: 26 children stopped with the habit of sucking, with 25 children presenting a reduction of the open bite. No change was observed in labial-lingual posture. CONCLUSION: The counseling interview favored the interruption of the oral habit and the correction of the open bite.
Occlusion has often to be corrected by grinding, should it be in T. M. J. pain-dysfunction cases, in periodontal cases or for the adjustment of prostheses. Indications and contra indications, clinical diagnosis, different means of marking interferences and the technique for grinding them in centric relation, protrusion and laterality are described. Emphasis is put on the necessity of completing the equilibration when it has been started because it is a general feeling that patients might become occlusion conscious and might be in danger of catching parafunctions.
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OBJECTIVE: To compare the Veau-Wardill-Kilner technique with a technique similar to the minimal incision technique described by Mendosa et al. on the basis of surgical complications and dentoalveolar status in the deciduous dentition. DESIGN: Retrospective study of medical and dental records and casts. PATIENTS: A consecutive series of 129 Caucasian children born with isolated cleft palate between 1980 and 1992. MAIN OUTCOME MEASURES: From medical records, the variables of time for surgery, blood loss, complications in the immediate postoperative period, and frequency of fistulas were evaluated. On dental casts, the variables of sagittal, transversal, and vertical relations; structure of the palatal mucosa; and height of the palatal vault were studied. RESULTS: Time for surgery was shorter in the extensive clefts repaired with a Veau-Wardill-Kilner technique. Blood loss was higher using the Veau-Wardill-Kilner technique. The width of the upper jaw was significantly narrower in the Veau-Wardill-Kilner group, compared with the minimal incision group. Scar tissue and pits of the palate were more frequently found in the Veau-Wardill-Kilner group. CONCLUSIONS: The minimal incision technique in this study has been shown to result in better development of the upper jaw with a better dental occlusion and palatal mucosa with significantly less scar tissue.
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