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Results for “Alveolar Process”

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PubMedDate not supplied

Secondary retention in the primary dentition.

Secondary retention refers to cessation of tooth eruption after emergence. The aim of this study was to evaluate the clinical, radiographic, and histological characteristics of secondary retention as well as the treatment results in a group of thirty-four patients with seventy-seven secondarily retained primary molars. The most important clinical and radiographical criterion for diagnosing secondary retention was infraclusion. Percussion was not a reliable diagnostic tool. Secondary retention in the primary dentition may predispose to a similar disorder in the permanent dentition. In many cases, occlusal disturbances and underdevelopment of the alveolar process disappeared spontaneously after eruption of the permanent successor, unless a similar disorder was observed in the permanent dentition. Active therapy is necessary only in case of severe infraclusion, severe malocclusion, dislocation or agenesis of the successor.

Adolescent↗
PubMed1990

Use of multiplanar computed tomography to aid in endosseous implant placement through hydroxylapatite overlay grafts.

Since the mid-1980's, mandibular ridge augmentation has been carried out with nonresorbable hydroxylapatite, with various results. This article describes the use of multiplanar reformated computed tomography to aid in the placement of endosseous fixtures through such augmentation. Displaced or migrated hydroxylapatite can obscure normal panographic and periapical radiographic landmarks. With the aid of computed tomography, landmarks can be identified, measured, and related to pre-treatment models, facilitating pre-surgical planning and surgical placement of endosseous fixtures.

Alveolar Process↗
PubMed1990

[Injuries of the facial skeleton in children].

An analysis of a group of patients hospitalized in 1985-1989 at the Dental Clinic for Children on account of facial injuries revealed a higher incidence of injuries in boys, as compared with girls, the ratio being approximately 1.8:1. The highest incidence was recorded in the group aged 9-10 years. Among skeletal injuries isolated mandibular fractures predominated followed by isolated fractures of the alveolar processes (19%) and isolated fractures of the middle portion of the face (12%). The most frequent fracture was that of the articular process of the mandible. 20% of the injuries patients had associated injuries, mostly of the CNS. In the aetiology of facial skeletal fractures falls from a bicycle held an important place (28%). From the therapeutics aspects 68% of the cases were treated by conservative methods, 25% were operated and 7% were left without treatment.

Accidental Falls↗
PubMedDate not supplied

[Inverted papilloma: implications for the oral and maxillofacial surgeon].

7 patients with inverted papillomas of the maxillofacial area were subjected to a post-treatment evaluation. Inverted papillomas were found in maxillary and frontal sinuses, ethmoid cells, nasal septa and as isolated lesions in the mucosa of the mandibular alveolar process. Apart from an inverted papilloma, one patient also had a mucoepidermoid carcinoma. The tendency to recur correlated well with the surgical approach. Radical removal of the mucosa must be called for as primary therapy in the paranasal sinus area. In order to safely exclude a concurrent carcinoma, the entire resected material must be examined histologically.

Adult↗
PubMed1990

[Active plate in preoperative treatment of infants with primary and secondary palatal clefts].

The study deals with trials of early maxillo-orthopaedic treatment of children born with cleft anomalies of the palate. In infants aged 1-2 weeks with unilateral or bilateral clefts of the primary and secondary palate with high-grade maxillary deformity active upper plate was used since the first labial operation at the age of 6-7 months. The obtained improvement in the mutual relationships of the cleft parts of the maxilla, the semicircular shape of the maxillary alveolar process and restoration of normal functions of sucking and swallowing ensure normal development of occlusion and function of the stomatognathic system.

Cleft Palate↗
PubMedDate not supplied

[Ligature binding by Risdon's method].

Classical and modified Risdon's binding was applied in 165 patients with jaw injuries as permanent immobilization. The method was applied in 79 outpatients and 86 inpatients in cases of: 1) isolated mandibular fractures in 124 cases (without displacement in 88 and with displacement in 36), 2/15 cases of dislocated teeth, 3) 10 cases of alveolar process fractures, 4) 6 cases of maxilla fracture, 5) 2 cases of tooth reimplantation, 6) 8 cases of osteosynthesis. This immobilization was done only in patients with preserved permanent teeth or with only some teeth missing, in recent fractures without displacement or with only slight displacement. In 162 cases (99.8%) good reduction and stabilization with union of fracture was achieved. The method with its modification is highly suitable for the treatment of isolated mandibular fractures as a simple, easy and effective method when the cases are properly qualified.

Fracture Fixation↗
PubMed1990

[Asymmetry of the face. Its repercussion on the dental system].

The author indicates the different radiological techniques available to demonstrate the variable degrees of asymmetry which are always present. He discusses the repercussions vis-a-vis the dental arches. These often pass unnoticed and are camouflaged by the differences in the orientation of alveolar processes, even in cases of pathological asymmetry.

Cephalometry↗
PubMed1990

[Preventive goals in the treatment of the mutilated dentition].

It can be expected that the percentage of edentulous people wil decrease in the coming decades as a result of an improved oral health, whereas the number of edentulous people will increase as a result of the strong increase of the ageing population. If the preservation of the natural dentition is no longer possible, the remaining teeth of a mutilated dentition have to be extracted according to some specific principles. But also the aftercare of the edentulous patient has to be extended according to some specific guidelines, within the framework of the so-called 'preventive-prosthetic-treatment-strategy'. Preservation of the alveolar process is the main goal in both cases.

Denture Design↗
PubMedDate not supplied

[Morphologic changes in the dental and periodontal tissues of rats exposed to autonomotropic preparations].

Autonomotropic [correction of Vegetotropic] drugs were injected to 40 rats for 10 days in order to detect changes in incisor growth rate and the morphologic changes in dental and periodontal tissues related with this changed rate. Adrenalin-enhanced eruption is associated with enhanced dentinogenesis and osteogenesis with increased salt deposition. Atropine, a cholinolytic, sharply inhibits incisor growth, this being parallelled with congestion in the pulpal and periodontal vessels and emergence of alveolar process bone tissue resolution. These findings have lead the authors to a conclusion that teeth eruption involved active plastic processes in dental pulp and periodontium tissues.

Animals↗
PubMed1989

Effects of certain therapeutic factors on facial development in isolated cleft palate.

Roentgencephalometry was used during the investigation of the effects of some therapeutic factors on the growth and development of the jaws in 64 adult males with an isolated cleft palate repaired by pushback. The anterior growth of the maxilla was not related to the age at the time of surgery or to orthodontic therapy with removable appliances. A small number of individuals operated during adolescence had also a shorter depth of the maxilla similarly as patients operated upon during early childhood. Anterior crossbite developed mostly in patients with reduced proclination of the upper alveolar process, while, on the contrary, a retrusion of the maxilla played no essential part. This observation proves useful for the prediction of the development of this malocclusion. The angle of sagittal jaw relations does not represent necessarily a valid criterion of the development of the jaws. In the presence of an overbite retrusion of the maxilla is associated with a retroposition of the mandible and thus the angle of sagittal jaw relations remains unchanged. Thus overbite represents an effective mechanism acting on the position of the mandible. A differentiated approach for the determination of the age of choice at the time of palate surgery according to the type and extent of the cleft is proposed.

Adult↗
PubMed1989

[Use of dense polycrystal particulate hydroxyapatite artificial bone implant in augmentation of deficient alveolar ridges].

The preliminary results of dense polycrystal particulate hydroxylapatite artificial bone implant procedures in a group of 14 mandibular alveolar ridges atrophy patient is reported. Clinical studies show that this material has very good biocompatibility. Subjective and objective data show that the implant was successful for all varieties of mandibular alveolar ridges, the height, bulk, contour, and ridge form were generally improved, and soft tissue overlying the augmented ridges was firm and immobile. Impressions for dentures were usually obtained 4-8 weeks after surgery, and the dentures were more stable, retentive, and esthetically pleasing than the preoperative ones. It is concluded that hydroxylapatite particles placed through a subperiosteal tunnel offer a highly successful method of ridge augmentation.

Aged↗
PubMedDate not supplied

[Mucopolysaccharidosis type I, Hurler's syndrome].

A 5-year-old girl with a very rare autosomal recessive disease, Hurler's syndrome, is described. This is a progressive disease and the main symptoms, typical for metabolic disorders of mucopolysaccharides were present. Only intransprarent cornea was not manifest, as it usually appears in advanced age. Dental examination confirmed the following symptoms: hypertrophic alveolar process; spaced, carious teeth; long tongue; enamel hypoplasia; hypocalcification; open teeth occlusion, etc. The prognosis is characterized by aggravation of symptoms till death in the second decade of life. The therapy is symptomatic.

Child, Preschool↗
PubMed1989

Location of the mandibular canal: comparison of macroscopic findings, conventional radiography, and computed tomography.

Four mandibular specimens were radiographically examined bilaterally to locate the mandibular canal. The following radiographic techniques were used: periapical and panoramic radiography, hypocycloidal tomography, and computed tomography (CT). The distance from the crest of the alveolar process to the superior border of the mandibular canal was measured in millimeters on all radiographs. The specimens were then sectioned, and the location of the mandibular canal (as measured on contact radiographs of the sections) was compared with measurements made on the other radiographs. The results showed that CT gave the most accurate position of the mandibular canal and is therefore probably the best method for preoperative planning of the implant surgery involving the area close to the mandibular canal.

Humans↗
PubMed1989

[Changes and stability of the cant of occlusal plane following orthodontic treatment].

The purpose of this study was to investigate the changes of the cant of occlusal plane during and after orthodontic treatment. Materials consisted of lateral roentgenocephalograms of 42 patients treated with full brackets system. Cephalograms were taken at following 4 stages; the beginning of orthodontic treatment, the beginning of retention, the end of mechanical retention and 3 years after the end of retention. Measurements were done at following angles and distance. 1. SN--occlusal plane angle 2. palatal plane--occlusal plane angle 3. mandibular plane--occlusal plane angle 4. Xi point--occlusal plane distance The results were as follows: 1. The SN-occlusal plane angle tended to decrease as time passed, although the pattern of the changes was different among Cl. I, Cl. II and Cl. III groups. 2. The changes of the occlusal plane mainly occurred within the limit of alveolar process. 3. Extension line of the occlusal plane tended to be close to the Xi point as time passed. 4. When the SN--occlusal plane angle was changed largely during the orthodontic treatment, it tended to relapse more after treatment.

Adolescent↗