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At least 487 records · Page 27Linked to original sources
PubMed1992

[Maxillary hypoplasia, associated with prognathism, and its surgical management].

The author has proved by the examination of the lateral x-ray images of hundred patients with progenia that with 64% of the patients the front part of the maxilla alveolaris extension was mildly retarded in growth. The deviation can be measured by means of the Sella-Nasion-A angles used in the evaluation of the x-ray image. Such anomaly can be ceased by a simple autotransplantation suggested by the author, simultaneously with the surgical correction of the progenia. Hereby the aesthetic effect will be improved, more pleasant harmonic features can be formed.

Adult↗
PubMed1991

[Factorial analysis of the "proper" angles involved in ethnic prognathism].

This work rest on 10 populations, chiefly arising from "musée de l'Homme" (Paris). 9 angles was considered in squeletal profile, and "reciprocal averaging" analysis was made. It shows the main function of peri-buccal segments situation, relatively to palatal and mandibular planes, as well as participation of facial whole situation relatively to anterior neurocranium. This analysis confirm the peculiar position of leucoderm men with reference to other groups.

Americas↗
PubMed1991

[Prognosis in the surgical correction of progenia and prognathism].

The soft tissue profile changes entailed by the operation were examined on teleroentgen image taken before and after operation in case of fifty patients with progenia and prognatism. The connection between the moving of the body and soft tissue of oral parts was determined and on basis thereof, the operational prognostics of the soft tissue was elaborated. The operational prognostics based on observations is shown on the photographical and x-ray documentation of one of the author's patients.

Humans↗
PubMed1991

A review of the literature on the prevalence of Class III malocclusion and the mandibular prognathic growth hypotheses.

From this review of the literature it appears that we may draw the following conclusions. The incidence of Class III malocclusions is at most 4.2% (Goose et al. 1957, Ast et al. 1965; Knowles 1966, Thylander and Myrberg 1973). The development of various condyle growth hypotheses have lead us to believe that the condyle behaves in a rather unique manner. The condyle does not appear to be an epiphysis, neither does it behave the same as the cranium. It is a unique cartilaginous structure that cannot grow against intermittent or continuous forces (Copray 1985). The cybernetic model as proposed by Petrovic and co workers (1977) that eloquently describes the condyle to be stimulated by a cybernetic switch that connects to the periodontal ligament also does not seem to have much validity. It appears that the lateral pterygoid muscle and the temporo-mandibular condylar frenum have been ascribed capabilities that do not comply to the results of condylotomy studies. Gorette-Nicaise, Awn, and Dhem (1983) as well as the study by Whetten, and Johnston (1985) have shown that neither the absence of the lateral pterygoid muscle nor the physical volumetric expansion of the airway increases condylar growth. It appears that increase in the pressure applied to the condyle could decrease condyle cell proliferation (Armstrong 1961; Thilander 1963; 1965: Janzen and Bluher 1965; Graber 1969; Petrovic 1972; Graber and Muller 1974; Graber 1975;) with resulting growth attenuation. Accordingly, condylar growth is controlled by physical restraint, the absence which leads to incremental growht. The presence of mechanical pressure of adequate duration and magnitude, thus, should limit growth of the young actively growing condyle.

Humans↗
PubMed1991

[Lingual-mandibular remodeling resection in prognathism].

The combination of --hypoplastic upper jaw, with narrow soft palate, --glossoptosis (or low, propulsive tongue), associated with protrusion of lower jaw, is well known. Early, exclusively orthopedic management combines enlargement of the superior arcade; functional/postural re-education of the tongue. Surgical management comes in later; it associates modeling resection of the tongue intended to position the tongue against the palate, with Chevron's mandibular resection, suppression of the first premolar, and salvaging the mental nerve. This type of osteotomy is indicated whenever a 6 to 8 mm mandibular retrusion is required. Fixation is monomaxillar, via extemporaneous splinting, associated with low external cortical osteosynthesis. The latter allows for gain of motor activity as early as the second day post-surgery.

Adolescent↗
PubMed1990

[A cephalometric, electromyographic and kinesiographic appraisal of a patient with mandibular prognathism and anterior openbite malocclusion before and after surgical orthodontic therapy: a case report].

A 19-year-old female patient with skeletal 3 and anterior openbite malocclusions was treated by a surgical orthodontic approach. A glossectomy was also performed. Cephalometric, electromyographic and kinesiographic records were taken before and after the treatment. The treatment results were as follows: 1. Esthetic improvement in facial profile and static alignment and intercuspation of teeth was obtained. 2. The dimension of the tongue with respect to that of the oral cavity proper measured on the lateral cephalograms revealed a value similar to that determined for the control data after the active treatment. 3. The proportion of reversed strokes with respect to the total chewing strokes increased at the completion of the active treatment both for the right- and the left-sided chewings, but it decreased during the retentive period. 4. At the initial stage, an earlier onset of the masseter muscle activity relative to the temporal muscle group was determined, while the temporalis muscles showed an earlier onset of activity in the postoperative phase. 5. The durations of chewing strokes became shortened in a postoperative phase both on the working and the balancing sides. This observation was particularly significant for the opening and the closing phases. In addition, the proportion of the duration of significant temporalis muscle activity with respect to that of the concomitant chewing stroke increased. 6. Anterior temporalis muscle and masseter muscle activity during clenching performance revealed a value similar to the control data. In summary, the current case suggests that the patients who receive surgical orthodontic treatment require sufficient time to obtain functional readaptation during the retentive period.

Adaptation, Physiological↗
PubMedDate not supplied

[Perioperative antimicrobial prophylaxis in Obwegeser-Dal Pont surgery for prognathism].

The value of ultra short antimicrobial prophylaxis using azlocillin in preventing postoperative wound infections was studied in a prospective clinical/bacteriological study in 41 orthognathic operations. Preoperatively the oral mucosa and pharyngeal flora of each patient was subjected to bacteriological identification with particular emphasis on anaerobes and sensitivity tests for organisms with established pathogenic potential. The results of a bacteriological examination of the redon drains on day 1 postoperatively indicated a contamination of the surgical wound. Clinically 31 patients showed moderate postoperative edema of the buccal soft tissues and 10 patients had hematomas or hemorrhages. In all patients the operation was followed by primary intraoral wound healing without any signs of an early infection.

Adult↗
PubMed1989

[Metrical studies of the soft-tissue behavior in the anterior dental arch in correct and prognathic anterior occlusion].

By using an intraoral electronic pressure transducer we estimated the pressures exerted by lips and tongue on the central incisors of both jaws. Our subjects were children with normal occlusion and class-III malocclusion. The forces were considered in action (swallowing, speech) and rest. We found that the pressure depends on the activity and where the measurements are taken. During the actions in general tongue pressure is higher than lip strength. But in resting the pressure on the vestibular soft tissues is higher. Forces during rest have an important influence on the total pressure, which takes duration and frequency of action as well as pressure during action and rest. The relationship between soft tissues strength and morphology was found in the lingual activities of subjects with class-III malocclusion.

Adolescent↗
PubMed1989

[Modified sagittal osteotomy of the ascending ramus for treatment of prognathism].

A retrospective study of 331 orthognatic interventions on the mandible was performed; a total of 528 osteotomies were practiced, on which personal modification of the intraoral sagittal technique of the ascending branch of the mandible was implemented on 134 patients, both pediatric and adult, within the period 1983-1988. This paper describes surgical technique and modifications to Obwegesser's sagittal osteotomy, as well as the advantages gained by such procedure, which the author considers ideal for the reduction of mandibular prognatism in its four variants.

Adolescent↗