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Biomedical subjects

E Cavazos

Publications and source records attributed to E Cavazos.

17 recordsLinked to original sources
PubMed1996

Prosthodontic management of ectodermal dysplasia: a review of the literature.

Ectodermal dysplasia is commonly a difficult condition to manage with prosthodontics because of the typical oral deficiencies and because the afflicted individuals are quite young when they are evaluated for treatment. It is important that these individuals receive dental treatment at an early age for physiologic and psychosocial reasons. This article reviews the literature that pertains to the prosthodontic treatment of the disorder and the review includes considerations in behavior management and timing of treatment.

Anodontia↗
PubMed1996

Preventing loosening of implant abutment screws.

A procedure for using dimples inside the abutment screw cylinder above the screws and filling the holes with elastomeric impression material will prevent the screw-retained prosthesis from loosening. A modification of the procedure can also be used for angled abutments.

Dental Abutments↗
PubMed1993

Electromyographic changes resulting from orthodontic correction of Class III malocclusion.

This study measured the electromyographic (EMG) amplitudes of the interference pattern (IP) and the integrated EMG (IEMG) of the masseter and temporal muscles in 10 children with Class III malocclusion before, during, and after treatment with a myofunctional appliance (the monobloc), and compared the EMG values with those obtained from 10 children with Class I occlusion. The results showed that before treatment the mean amplitude values of IP were significantly higher in the Class III than in the Class I group. The mean amplitude values for IP activity in both muscles decreased during and after treatment; however, mean values of the IEMG activity did not show significant change for either muscle. These results are attributed to changes in the length of the muscle fibres as well as to neural modifications. This study demonstrates a non-invasive method that can be used to study the functional effects of orthodontic treatment.

Child↗
PubMed1992

Tumours of the limbic and paralimbic systems.

Clinical manifestations, findings, management and outcome of a series of 177 cases with tumours of the limbic and paralimbic systems are presented. There was no operative mortality. Postoperatively 95% of them had no or only minor neurological deficits. Most of them were able to resume work. Pre-operatively 77% of the patients had epilepsy, but 84% became seizure-free after tumour removal. All 77 cases with malignant tumours died within 1-5 years. In the past many neurosurgeons were reluctant to attempt complete tumour removal in these areas. This series demonstrates the efficacy of highly skilled microneurosurgery.

Adolescent↗
PubMed1991

Film thickness of four disclosing media.

The use of disclosing media has been recommended to enhance the fit of castings. This study evaluated the film thickness of four disclosing media: (1) disclosing wax, (2) Net spray, (3) G-C Check Fit material, and (4) Extrude polyvinylsiloxane (low viscosity) impression material. ADA Specification No. 8 for zinc phosphate cement gives a maximum film thickness for the cement that was used as the control for these four media. The results demonstrated that the film thicknesses of all four disclosing media were less than the 25 microns maximum allowed for zinc phosphate cement.

Dental Materials↗
PubMed1991

Surface detail reproduction of Type IV dental stones with selected polyvinyl siloxane impression materials.

Four polyvinyl siloxane impression materials and 14 modified Type IV dental stones were evaluated for their abilities to reproduce surface detail. Each combination of impression material and dental stone was used to duplicate a 20-microns-wide line. Surface detail reproduction was observed by two paired-rater groups. The line was reproduced in all impression material specimens, but in only 32% of the stone cast specimens. Some combinations of impression material/dental stone reproduced the line all or most of the time, but 12 combinations did not reproduce the line at all.

Calcium Sulfate↗
PubMed1990

Persistent hypoglossal artery in combination with multifocal arteriovenous malformations of the brain: case report.

The persistence of embryonic cerebral vessels in the adult is not a frequent occurrence, neither is the presence of multifocal arteriovenous malformations (AVMs) of the brain. The most commonly reported type of persistent carotid-basilar anastomosis is the primitive trigeminal artery, followed by the primitive hypoglossal artery (PHA). In this report, a 30-year-old, right-handed woman hospitalized because of subarachnoid hemorrhage and harboring an intracerebral-intraventricular hematoma resulting from the rupture of one of two independent AVMs of the left cerebral hemisphere, was found also to have a right persistent PHA. One AVM was intraventricular and had ruptured; the other was subcortical, intact in the parietal lobe. The PHA originated as a large anomalous branch of the right internal carotid artery in the neck and joined the basilar artery after entering the posterior fossa through the ipsilateral anterior condyloid foramen, which was enlarged. At craniotomy, the two AVMs were successfully excised with the aid of microsurgical technique. These two independently rare conditions, namely, multifocal cerebral AVMs and persistent PHA, warrant our desire to report this case.

Adult↗
PubMed1990

Effect of occlusal splint therapy on blink reflex time in TMJ dysfunction patients.

This study compares the changes that occur in latency before and after use of splint therapy in patients with TMJ dysfunction. The sensory fibers of the upper branch of the trigeminal nerve were stimulated and the time required for the sensory and motor responses to occur were measured. A reduction in latency occurred in the late component. Also a reduction of the delay occurred between ipsi and contralateral late responses. This finding can be attributed to the lateral reticular formation in the blink reflex arc. This study demonstrates a method for evaluating TMJ dysfunction and a way to monitor clinical response.

Blinking↗
PubMed1987

Cerebral arteriovenous malformations in children and adolescents.

A series of 19 juveniles with cerebral arteriovenous malformations is reported. The group is composed of 8 children and 11 adolescents, aged 9-18 years, with an average age of 14.5 years. There were 10 males and 9 females. Twelve juveniles were treated by operation. Ten patients were operated upon electively; one of these died as a direct consequence of excision of the arteriovenous malformation--a female patient with an arteriovenous malformation of the corpus callosum. One other patient in this category expired 3.5 months after the removal of the arteriovenous malformation, from unrelated infectious complications arising from a preoperational ventriculo-peritoneal shunting procedure. Two patients were operated upon on an emergency basis because of an associated intraparenchymal hematoma; both of these patients died. All surgical survivors are leading independent lives. The postoperative observation period ranges from 6 months to more than 17.5 years, with an average of 6.6 years. Of the seven patients treated by nonsurgical means, one was hospitalized in a coma after rupture of the arteriovenous malformation and died shortly after admission; another--a girl in the fifth month of her first pregnancy--was admitted in a stupor and expired from a recurrent subarachnoid hemorrhage 3 weeks after the first occurrence. Five nonsurgical patients left the hospital in good condition, but one died at home 2 years later from intractable cardiorespiratory insufficiency associated with an aneurysm of the vein of Galen.

Adolescent↗
PubMed1985

Effects of porcelain-metal junction angulation on porcelain fracture.

The different porcelain-metal junction angulations from 45 to 135 degrees have no effect on the amount of compressive force required to fracture the porcelain. The compressive force required to fracture the samples was reduced by half when the contacts were placed 1 or 2 mm from the porcelain-metal junction. Nevertheless, even at 2 mm from the porcelain-metal junction, the compressive strength was approximately six times that of the average biting force. Therefore, clinical fractures are not the result of biting force but possibly the burnishing effect on the metal as the patient slides through the junction. An experiment designed to study a sliding force on the porcelain-metal junction is needed to understand the causes of fracture that originate there and to determine an optimum distance for the placement of occlusal contacts.

Bite Force↗
PubMed1985

Temporization techniques in fixed prosthodontics.

Temporary restorations are very important during the construction of final restorations. The success of the final restoration often depends on a well-made temporary. This article reviews the requirements, materials, and techniques available to the profession for temporary restorations.

Composite Resins↗
PubMed1984

Persistent trigeminal artery associated with intracranial arterial aneurysm.

Two patients with persistent trigeminal artery associated with a ruptured arterial intracranial aneurysm arising from the ipsilateral internal carotid artery at the level of the posterior communicating artery are presented. One patient underwent successful clipping of the aneurysm. The other patient died on the x-ray table shortly after admission during the performance of emergency carotid angiography. In each patient, the anomalous vessel was considered to be incidental.

Aged↗
PubMed1984

Giant cell reparative granuloma of the cranial vault: exceptional bone lesion.

Giant cell reparative granuloma (GCRG) is an uncommon nonneoplastic lesion of bone. It is even rarer in the bones of the skull, particularly in the calvarial bones. Originally considered to be peculiar to the jawbones, GCRG has been described in some other locations, such as the short tubular bones of the hand and the facial (paranasal) bones. Only one GCRG has been found in the skull, this one in the temporal bone. The authors were unable to find a report of such a lesion in the bones of the calvarium. The etiology of GCRG is unknown, but it is believed to result from a traumatic intraosseous hemorrhage or periosteal reaction. A GCRG was diagnosed in a 31-month-old male infant who presented with a nonpainful, slow-growing, right frontal swelling, apparently related to a head contusion that had occurred 21 months earlier. The lesion was removed surgically. The main differential diagnosis is giant cell tumor.

Child, Preschool↗
PubMed1983

Evaluation of a fixed removable partial denture: Andrews Bridge System.

Fixed removable partial dentures are particularly indicated for patients with extensive supportive tissue loss and when the alignment of the opposing arches and/or esthetic arch position of the replacement teeth create difficulties. The Andrews Bridge System is one solution. When the oral architecture permits the construction of either a fixed partial denture or a fixed removable partial denture, the decision depends on specific clinical factors and the desires of the patient.

Bone Resorption↗
PubMed1983

A simple method of boxing rubber base impressions.

The advantages of boxing an impression are better adaptation of stone around dowel pins, control over the level of the second pour of stone, and minimal cast trimming. This article describes a simplified boxing technique that offers the following additional advantages: Parts of the impression that are inadequate in length can be extended to ensure a die of adequate length (Fig. 6). Boxmat adheres to the rubber base and facilitates application. Contouring the palatal or lingual part of the impression is greatly simplified and provides access for sawing out dies. The material is reusable.

Dental Impression Materials↗