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Results for “Alveolar Process”

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At least 325 records · Page 18Linked to original sources
PubMed1995

Assessment of the dentate alveolar process with high resolution computed tomography.

The present study was undertaken to determine quantitatively the accuracy of modern high-resolution computed tomography (HR-CT) in imaging periodontal defects in vitro by means of comparative radiological and histological studies. The soft tissue and metallic restorations were removed from four mandibular and maxillary jaw segments. Eighteen lingual and buccal defects of different dimensions were artificially created over the roots of the teeth. Dental radiographs and 1.0 mm contiguous axial and coronal HR-CT scans were obtained. Histological specimens were prepared in the same plane as the CT scans. A quantitative analysis of the periodontal regions on the CT scans was feasible when the alveolar bone was 0.5 mm thick. A visible periodontal ligament space was found to improve the reliability of the measurement of buccal or lingual bone plates up to 0.2 mm thick or of the artificial dehiscences. In the axial HR-CT scans, 70% of the artificial defects could be identified. and in the coronal scans, 50%. In contrast, none of the defects could be evaluated on conventional dental radiographs. It is concluded that HR-CT scanning could be useful in assessing buccal and lingual alveolar bone morphology and in diagnosing larger dehiscences.

Alveolar Bone Loss↗
PubMed2005

[X-ray study of alveolar processes of the jaw bones of adult patients with gingival hyperplasia induced by Ca antagonists].

New data are presented about X-ray changes in patients aged 51-78 years with gingival hyperplasia induced by Ca antagonists. The interrelation between bone destruction presence or absence and gingival hyperplasia is disclosed. Orthopantomogram and clinical data showed that the loss of interalveolar bone was closely and significantly approaching the periodontal pockets depth.

Aged↗
PubMedDate not supplied

[Elevation-rotation surgical technic of the edentulous upper alveolar process in cases of latero-posterior vertical collapse].

This paper presents and discusses an original surgical technique designed to solve edentular problems in lateral-posterior sectors involving one or both opposing arches, where insufficient prosthetic reconstruction not infrequently gives rise to vertical collapse which then obliges the dental surgeon to prepare space for suitable prosthetic reconstruction. The surgical, requiring segmental osteotomy of the lateral-posterior edentulous region is presented.

Adult↗
PubMed1986

[Behavior of cysteine proteinase inhibitors in autologous epidermis transplanted into oral mucosa for relative elevation of the alveolar process].

The presence of cysteine proteinase inhibitors was investigated in skin autografts into the gingiva of denture carriers. Acid cysteine proteinase inhibitors was present both in the transplant and the surrounding gingival epithelium, while neutral cysteine proteinase inhibitors was seen only in the gingival epithelium. The results indicate that the normal expression of cysteine proteinase inhibitors is conserved during the adaptation of the skin autograft into the oral surroundings.

Alveolar Process↗
PubMed1995

Diagnosis of infra-alveolar bony lesions in the dentate alveolar process with high-resolution computed tomography. Experimental results.

RATIONALE AND OBJECTIVES: Conventional intraoral radiography was compared with axial computed tomography (CT) scans for identification and classification of bony pockets in dentate jaw segments. METHODS: Fifty-five artificial bone defects were produced in six dentate jaw segments. The jaws were examined radiographically using a dental x-ray unit and by contiguous axial CT scans. Identification, classification, and vertical depth of the bony defects were compared among the specimens, radiographs, and CT scans. RESULTS: On the intraoral radiographs, 38 (69%) bony lesions were identified, and the vertical depth was underestimated by a mean of 2.2 mm, compared with the objective measurements on the jaws. In contrast, all artificial bony lesions (100%) were identified and classified on the axial CT scans and the vertical depth was underestimated by a mean of 0.5 mm. CONCLUSIONS: High-resolution CT improves the identification and metric assessment of the vertical dimension of infra-alveolar bony lesions compared with conventional intraoral x-ray films and allows these defects to be classified according to the number of existing walls into one-walled, two-walled, and three-walled bony pockets. In patients with apically extended metallic restorations, the image quality could be limited by artifacts.

Alveolar Bone Loss↗
PubMedDate not supplied

[Deformities of the dental arch and alveolar process in children related to the removal of the lower temporary molars].

A total of 279 children aged 3 to 12 years were investigated. In 59 dentition defects were detected. These were located largely (39 patients) on a lower jaw. Dentoalveolar extension was found in 28 patients aged 5 to 8 years. Dentoalveolar extension was characterized as was the position and state of dental rudiments. Of 59 children put on a regular check-up list, in 28 preventive dentures were installed to avoid secondary deformation and dentomaxillary anomalies formation.

Alveolar Process↗
PubMed1981

[Statistical study of alveolar process inclination. Analysis of results of teleradiographic examinations of the head, in sagittal and vertical projection, in 1 600 children referred for consultation in a specialised dentofacial orthopedic unit (author's transl)].

For 1 600 children sent to a dental facial orthopedics consultation, the vestibulo lingual inclination of the incisors and molars was measured on two cephalograms of the head, the first one in profile, the second in vertical incidence, the X-Rays being perpendicular to the plane of the biting surfaces of the molar teeth. A statistical analysis was realized on the dental inclination previously observed in order to precise the frequency and amplitude of each anomaly, test their associations and evoke their muscular causes.

Adolescent↗
PubMed2001

Segmental distraction osteogenesis of the anterior alveolar process.

PURPOSE: This article describes a nonextraction therapy for patients with anterior tooth crowding in the mandible or with an unfavorable relation between the anterior dentoalveolar area and the skeletal base. The method involves the gradual repositioning of the dentate segment by use of distraction osteogenesis. PATIENTS AND METHODS: The method was applied in 25 patients. Indications comprised skeletal Class II patients with crowding, Class I patients with crowding, and Class III patients requiring decompensation before orthognathic surgery. A special hinge-joint bone plate was developed to allow the rotation of the anterior bone segment into the desired position. The gradual repositioning was achieved with orthodontic appliances. RESULTS: The procedure was successful in all patients. The typical advancement at the incisal edge was 2 to 5 mm. CONCLUSION: This method represents a new approach for nonextraction therapy in the mandible. It requires no soft or hard tissue grafting and results in favorable tissue conditions at the distraction site.

Alveolar Process↗
PubMed1980

Tomography of the alveolar process.

This radiologic study using hemisected dog jaws was undertaken to determine whether or not tomographic techniques would be superior to standard dental x-ray techniques in detecting prepared periodontal defects within the cancellous bone of dog jaws. Specifically, it was done to determine whether or not tomography might be a reliable method of checking for bone fill in periodontal bone-grafting therapy. As an additional measure, a radiographic study, using a hemisected dog mandible and standard dental x-ray techniques, was undertaken to determine whether lesion size or cortical plate involvement was the determining factor in radiographic visibility. When tomographic techniques were used 55% of thirty-one prepared defects were visible, while standard dental x-ray techniques detected 29% of the same defects radiographically. The differences in detection rate were not statistically significant when analyzed by chi square. Although tomography resulted in radiographic visibility of a greater number of prepared defects, it is not reliable enough to replace re-entry procedures for documentation of bone fill in clinical studies of periodontal bone-grafting procedures. In the additional study it was determined that cortical plate involvement was the determining factor in radiographic visibility of bony defects.

Alveolar Process↗
PubMed1989

[Augmentation of alveolar process with hydroxylapatite--clinical orthodontic experience].

23 Patients were followed up clinically and by X-ray. In this cohort eight maxillary and 19 mandibular alveolar bone augmentations with hydroxylapatite granules mostly in a subperiosteal tunnelling procedure had been done. In most cases prothetic treatment was administered in our hospital. The dentures had been in place for a little over three years. Over this period of time there was hardly any change in the shape of the augmented ridges, denture retention, and vertical dimension. Drawbacks of the procedure became evident as reduced load resistance of oral mucosa during mastication and recurring impingement spots. In some cases, particularly when there was little vertical bone height, pain occurred in the area of the mental nerve.

Alveolar Ridge Augmentation↗
PubMed2005

The restoration of anatomic form of atrophied alveolar processes of jaws with the help of bioimplant lioplast.

The purpose of the present research was: 1. To investigate the opportunity of application of allogen osteoplastic materials such as Lioplast, received in Samara Tissue Bank of Samara State Medical University. 2. To work out a new technique of producing lyophilized allogen osteoplastic materials, such as Lioplast, with application of an ultrasonic method of clearing. 3. The development of various techniques of operative intervention on jaws for increase in volume of atrophied, as a result of secondary adentia, alveolar shoot. 4. The application of spongy allogen osteoplastic material as a skeleton for filling in surgical operations on jaws. 5. The demonstration of the Technique of a bone-periostic Lioplast 'sandwich' for formation of an alveolar shoot.

Animals↗
PubMed2005

[Vertical distraction osteogenesis of the alveolar process for implant treatment].

The rehabilitation of the chewing function of a patient is ultimately dependent on the quality and volume of the available jawbone. The vertical augmentation of the jawbone is often a challenge for the implanting dentist. Various methods, from transplanting autogenous bone through to the employment of bone substitute materials have been described and often controversially discussed. Vertical distraction offers an alternative to the pre-implantological augmentation of the vertically reduced bone. A technique which shows certain advantages over conventional augmentative methods.

Adolescent↗
PubMedDate not supplied

A distraction abutment system for 3-dimensional distraction osteogenesis of the alveolar process: technical note.

To date, distraction osteogenesis has been carried out exclusively with devices that allow distraction in one given direction only. However, the new distraction abutment system described in this article allows distraction in any functionally or esthetically desired direction following osseointegration of 1 or several implants, provided that there are adjacent teeth or other osseointegrated implants. With this abutment system, an implant fixed in a position dictated by available bone volume can be moved into a prosthetically desirable position following segmental osteotomy. Accordingly, it also allows correction of the position of implants that were placed at an early age but whose position has changed as the result of jaw growth. Compared with conventional augmentation techniques carried out before or after implant placement, this method should lead not only to a shorter overall treatment time, but also to reduced strain on the patient and better long-term prognosis for success of implants.

Adolescent↗