- Type of paper
: Paper in journal
Title: AVERAGE DISTANCE AND THE MOST FREQUENT LOCALIZATION OF
ASYMMETRIC ROOTCANAL OPENING
- Authors:
- Blašković-Šubat, Višnja (161925)
- Maričić, Branimir (69464)
Journal: MEDICINA
ISSN: 0025-7729
Volume: 27
Year: 1991
Pages: from 69 to 75
Number of references: 18
Language: hrvatski
Summary: The asymetric root canal opening is an anatomical
phenomenon whenthe major apical foramen deviates from the anatomical root
apexmore cervically to one of the root surfaces. In order todetermine the
position and the mean distance of the major apicalforamen from the
anatomical root apex, 230 roots of permanentteeth were examined
stereomicroscopically and radiographically.The distance between the
deviation of the major foramen and theanatomical root apex averaged 0,99mm
in the total sample, 1,1mmfor the posterior teeth and 0,73 for the anterior
teeth. The mostfrequent position of the deviation of the major foramen
wasdisplayed on the distal root surface (31,7%), but this finding isnot
statistically significant. The localisation of the asymmetricroot canal
opening is irregulary distributed on the root surface.The study suggest
that the reliance on the dictum that canalpreparation should terminate 1mm
shorter than radiographic apexis becoming increasingly unacceptable. The
findings of thisstudy, therefore, appear to encourage the use of a
combination ofthe tactile, electronic and radiographic estimation of the
toothlength for all teeth where root canal therapy is to be carriedout.
Keywords: asymmetric root canal opening, apical foramen, root apex
- Type of paper
: Paper in journal
Title: FREQUENCY AND MOST COMMON LOCALISATION OF ROOT CANAL
CURVATURE
- Authors:
- Blašković-Šubat, Višnja (161925)
Journal: ACTA STOMATOLOGICA CROATICA
Number: 2
ISSN: 0001-7019
Volume: 25
Year: 1991
Pages: from 109 to 115
Number of references: 22
Language: hrvatski
Summary: The root canal therapy of the curved canals is a
complexoperative procedure. Therefore 260 root canals were
analysedradiologically to determine the frequency and the most
commonlocalisation of the root canal curvature. The frequency of thecurved
canals averaged at 59%, being greater in the sample ofposterior than in the
anterior teeth (p < 0,05). The root canalcurvature was most frequently
localised at the apical third part(53,9%), followed by the cervical (33,3%)
and the middle (12,8%)third part. The apical curvature was predominant in
the sample ofthe anterior, while the cervical predominant (45,2%) in
thesample of the posterior teeth. This study pointed out that thefrequency
of the curved canals is rather high. Consequently, thenecessity for
practising the modern root canal preparationtechniques, bearing in mind
their potential danger, isemphasized.
Keywords: root canal, root canal curvature, root canal instrumentation
- Type of paper
: Paper in journal
Title: CONTOURS OF APICAL FORAMEN OBSERVED STEREOMICROSCOPICALLY
- Authors:
- Blašković-Šubat, Višnja (161925)
Journal: ACTA STOMATOLOGICA CROATICA
Number: 4
ISSN: 0001-7019
Volume: 25
Year: 1991
Pages: from 225 to 229
Number of references: 17
Language: hrvatski
Summary: Two hundred and sixty major apical foramina were
examinedstereomicroscopically to determine the contours of the
apicalforamen and the frequency of each shape. The observation waspreformed
at 15 x magnification. During the examination thefollowing shapes were
observed: circle, elipse, teardrop, numbereight and irregular forms. Apical
foramen most frequently had thecircular shape and it was registrated in
58,8 per cent of themain root canal openings. The elliptic contour was
presented in22.7 per cent, the teardrop shape in 10,4 per cent and the
shapesimilar to number eight occured in 5,0 per cent of samples.
Thestatistical calculation revealed that the circular shape of theapical
foramen is the most frequent finding (p < 0,01). Thisfinding seems to be
optimistic in an attempt to preform thehermetic sealing of the apical
foramen.
Keywords: apical foramen, root canal
- Type of paper
: Paper in journal
Title: ASSYMETRY OF THE ROOT CANAL FORAMEN
- Authors:
- Blašković-Šubat, Višnja (161925)
- Maričić, Branimir (69464)
- Šutalo, Jozo
Journal: INTERNATIONAL ENDODONTIC JOURNAL
Number: 1
ISSN: 0143-2885
Volume: 25
Year: 1992
Pages: from 158 to 164
Number of references: 17
Language: engleski
Summary: Deviation of the major apical foramen from the anatomical
rootapex is a recognized phenomenon. To determine the frequency,position
and mean distance of the major apical foramen from theanatomical root apex,
230 roots of permanent teeth were examinedstereomicroscopically and
radiographically. Radiographic analysiswas used to establish how accurate
the conventional radiographwas in displaying such a deviation. The
frequency of deviation ofthe major foramen, determined
stereomicroscopically, was 76%, anddepended on the type of teeth examined.
Radiographic analysis ofthe same sample revealed 57% of root canals had
symetry of theroot canal foramen. Agreement of stereomicroscopic
andradiographic findings was found to be 61%. The most frequentdeviation of
the major foramen was on the distal root surface29%, but this was not
statistically significant. The meandistance between the deviation of the
major foramen and theanatomical root apex was 0.99mm. The study indicates
that theclinician should consider deviation of the foramen during rootcanal
treatment, as the deviation could not easily be detectedradiographically.
Keywords: apical foramen, root canal anatomy
- Type of paper
: Paper in journal
Title: Effect of systemic diseases on the alveolar bone radiogram
- Authors:
- Blašković-Šubat, Višnja (161925)
Journal: ACTA STOMATOLOGICA CROATICA
Number: 28
ISSN: 0001-7019
Year: 1994
Pages: from 139 to 146
Language: hrvatski
Summary: The alveolar bone of the maxilla and mandibule is both a
tissue and an organ of the hematopoietics system, participating in
hemotopoiesis and mineral homeostasis. Disturbances from both aspects
produce changes that are monifested on the alveolar bone radiograms.
Resorbed bone areas have been observed with hyperthyroidism,
hyperparathyroidism, Paget's disease, chronic anemia, vitamin D resistant
rickets, primary and metastatic tumors of the jaws, etc. Pathologic
sclerozation of the alveolar bone may occur consequentially to
osteopetrosis, chronic sclerosing osteomyelitis, odontogenic tumors and
osteomas.
Keywords: periapical granuloma, radicular cyst, alveolar osteosclerosis, alveolar osteoporosis
- Type of paper
: Summary in proceedings
Title:
- Authors:
- Blašković-Šubat, Višnja (161925)
- Smojver, Ivica
Proceedings title: Knjiga sažetaka
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96271-0-9
Pages: from 21 to 21
Meeting: 1. svjetski kongres hrvatskih stomatologa
Held: from 11/03/94 to 11/05/94
- Type of paper
: Ph.D.
Title: A computerized method for the evaluation of root canal
morphology
Faculty: Medicinski fakultet Sveučilište u Rijeci
Author: BLAŠKOVIĆ-ŠUBAT VIŠNJA
Date of defense: 09/19/94
Language: hrvatski
Number of pages: 200
Summary: There is no successful endodontic therapy without an
intimate knowledge of the root canal morphology. The objective of this
research was to develop a technique, utilizing computer image processing
that would allow three-dimensional imaging of root canals. Ten single
rooted permanent human teeth with mature apices were analyzed. The teeth
were decoronated, fixed on boards with the long axis of the root
perpendicular to the fixative board. The cross-sectioning started at the
root apex and continued in the coronal direction, roughly perpendicular to
the long axis of the root. It was important to registrate the distance
between the previous and following section. After each section the root
canal contour was determined utilizing the calibrated net with co-ordinate
system in the occular of the stereomicroscope. The determined co-ordinated
were relevant input data for the reconstruction of root canal
cross-sections, longitudinal sections and for the final three dimensional
rebuild of the root and root canal model. Overall, this technique appears
to be very accurate in determining the anatomy of the root canal system.
The possible applications of this technique could be found in the other
fields of dental research.
Keywords: computerized analyziz, root canal morphology, three-dimensional root reconstruction
