Biomedical subjects

S Percac

Publications and source records attributed to S Percac.

6 recordsLinked to original sources

PubMed1999

Anomalous origin of both vertebral arteries.

The authors describe a case of an unusual origin of both vertebral arteries in a singular cadaver. On the left, the artery arises directly from the common trunk of vertebral and subclavian artery at the aortic arch and enters the transverse cervical foramina at C VI. On the right, the artery originates from the right common carotid artery and enters the transverse foramina at C III. Additional anomalies were observed on the aortic arch: the common trunk of both common carotid arteries, the common trunk of the left vertebral and subclavian artery, and as a last branch, the retroesophageal right subclavian artery. The morphometric measurements of the vertebral arteries were performed. The literature on the variations of the vertebral arteries is reviewed and their clinical importance for diagnostical procedures and head and neck surgery stressed.

Aged↗

PubMed1998

Problem based teaching and learning as a bridge from basic anatomy to clinical clerkships.

This article describes a Clinical Anatomy course designed to bridge basic anatomy with clinical clerkships. It is given in the second year, after the traditional dissecting anatomy course. Students revisit anatomy during small group discussions of clinical cases. An example of a case is described together with a summary of a typical group process stimulated by the case. The group process enables students to develop clinical thinking and problem solving skills fundamental to clinical practice. They learn to search for medical knowledge resources, and to work in teams. The tutor evaluates the students' progress based on their knowledge building, problem solving and development of their interpersonal skills. Problem based learning in this interdisciplinary anatomy course allows students and faculty both horizontal and vertical integration within the curriculum.

Anatomy↗

PubMed1997

Anatomy teaching: students' perceptions.

The goal of this study was to analyse students' perceptions of anatomy teaching. A questionnaire was distributed to two classes of first year dental students taught anatomy in both problem-based learning (PBL) and traditional formats. The questionnaire explored the students' most preferred techniques for learning anatomy, their examination preferences and their perceived level of mastery of anatomy. Fifty-seven (95%) students completed the survey. The most commonly used study aids were atlases, dissection and lecture notes (in descending order). Students expressed the desire for the final examination to include both written and oral components. Six months after the final examination, the students reported their perceived level of mastery of anatomy as either "very good" or "OK". Even in the PBL curriculum 39% of both classes felt it is necessary to have quizzes during the course to motivate and guide them in studying anatomy.

Anatomy↗

PubMed1996

Impacted canine in a prehistoric skull.

Impacted teeth are frequently found in humans today, but current data suggest their existance in skulls originating from the prehistoric age. This report describes the skull of an adult female that was found during excavation in the Croation enolithic site of Vucedol (2700-24--BC). The skull is well preserved and, according to cranial and facial index calculation, is classified as dolichocephalic and mesoprospic. Cephalometric analysis revealed bimaxillary prognathism. The maxillary left canine is impacted and its crown peak is visible through the alveolar maxillary bone fenestration. The position of the canine was verified using x-rays, and is described in this study as an isolated finding. The reported occurrence of impacted teeth in prehistoric material appears to confirm the multifactorial etiology of this anomaly.

Adult↗

PubMed1992

Structural analysis of the mandible by quantitative computed tomography.

The study presents quantitative computed tomography (QCT) as a noninvasive method for analyzing the inner bone structure. Randomly selected mandibles from the osteological collection of the "Drago Perović" Institute of Anatomy, School of Medicine, Zagreb were CT-scanned in five bone areas. Analyzing the densitometry curve in two horizontal levels the relation between the compact and spongy bone and the total amount of bone substance in each area were determined. The smallest bone quantity was found in the area of the neck and angle of the mandible, the areas of most frequent bone fractures. The alveolar part of the bone, apart from the area of the angle, was considerably less thick than the base of the mandible. The compact bone was predominant in all CT-scans.

Adult↗

PubMed1991

Influence of teeth loss on morphometric characteristics of the maxilla.

Using Martin and Saller's method in analyzing 90 skulls which belonged to adults of both sexes established are twelve basic morphometric characteristics of maxillas in the recent population of Croatia. Presented are differences in the morphology of dentate and edontulous jaws. Morphometric characteristics of maxillas in the recent population of Croatia do not significantly differ from maxillar characteristics of other white ethnic groups of the same absolute age. By the change of biomechanical conditions and interaction of forces caused by the loss of teeth, reabsorption of bones occurs. The alveolar process atrophies the first, causing the reduction in the maxillar length and width in the molar, as well as in the anterior part of the bone. Although the width of the palate is constant, the reduction of its length occurs. The foramen infraorbitale approaches the alveolar margin of the bone due to the reabsorption of the alveolar ridge, but its distance from the orbital edge gets reduced too, due to the overall atrophy the bone. Advancing of age, if not accompanied with the loss of teeth, does not significantly influence morphometric characteristics of the maxilla.

Adult↗