1
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Brudvik, P.
MEDFORF: Rygh, P.
TITTEL : Non-clast cells start orthodontic root resorption in the periphery of
hyalinized zones.
SIDEREG: s. 467-480
SPRÅK : eng
TIDSKR.: European journal of orthodontics
ÅR/DATO: 1993
VOLUM : 15
ISSN : 0141-5387
SAMMEND: Previous research has indicated that orthodontically-induced root
resorption is regularly associated with local trauma, most often with
over-compression of the periodontal ligament (PDL). Recent research
has revealed that the initial root resorption occurs in the periphery
of the necrotic PDL, where mononucleated cells not stained by
tartrate resistant acid phosphatase (TRAP), are the first cells to
penetrate the root surface. The aim of the present transmission
electron microscopic (TEM) investigation was to study in more detail
the root surface during the initial penetration of cells into
precementum and mineralized cementum. In 21 Wistar rats (age 40-45
days) the maxillary first molar was moved mesially by a closed coil
spring for 6 and 12 hours, 1, 2, 3, 4, and 5 days. The results
clearly indicate a role for mononucleated non-clast cells in the
initial local removal of precementum and mineralize d acellular
cementum in the periphery not only near, but also at some distance
from the compressed PDL. 1. Macrophage-like cells phagocytosed
necrotic tissue in the middle of the PDLafter 6 hours and near the
root surface close to the hyalinized zone after 24 hours. 2.
Fibroblast-like cells seemed to break down by phagocytic and
collagenolytic activity the precem entum near the hyalinized zone
after 24 hours. 3. The surface layers of mineralized cementum were
removed by mononucleated cells which occurred on the mineralized
cementum after 3 da ys. 4. Multinucleated cells without ruffled
border occurred in the PDL at some distance from the root surface
after 24 hours. Multinucleated cells with a ruffled border towards
the mineralized root surface were rare during the 5 days' period.
PUBL-ID: r94006401
2
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Brudvik, P.
MEDFORF: Rygh, P.
TITTEL : The initial phase of orthodontic root resorption incident to local
compression of the periodontal ligament.
SIDEREG: s. 249-263
SPRÅK : eng
TIDSKR.: European journal of orthodontics
ÅR/DATO: 1993
VOLUM : 15
SAMMEND: The present light microscopic investigation was undertaken in order
to study the initial phase of orthodontic root resorption in areas of
pressure and, more specifically, to focuson the first cells that
penetrate the root surface. Twenty-one upper first molars (rats) and
31 lower first molars (mice) were moved mesially by a fixed
orthodontic appliance. The exp erimental periods were 1, 2, 3, 4, and
5 days in rats, and 1, 2, 3, 4, 5, 6, 7, and 8 days in mice.
Tartrate-resistant acid phosphatase (TRAP) and Haematoxylin Eosin
(H&E) stains wer e used. Root resorption related to a hyalinized zone
showed a consistent pattern: Root resorption started in the
circumference of the necrotic hyalinized tissue. In the central parts
of the hyalinized zone frontal root resorption occurred 3-4 days
later than in the periphery. Indications that the mechanisms for
circumferential and central resorption differed was the reason for
presenting only the periphery stage in this paper. The initial
penetration of cells into precementum/cementum occurred at the
peripheries or at a short distance from the peripheries of the
hyalinized zone. These cells were TRAP-negative, indicating that they
were not clasts or clast precursors. Before this happened
TRAP-negative macrophage-like cells were observed at the borderline
between the hyalinized tissue and vital periodontal membrane (PM).
TRAP-positive cells were first observed in the bone marrow spaces.
During the later st ages mono- and multi-nucleated TRAP-positive
cells were participating in active removal of the hyalinized tissue
toward the root surface, and in resorption of cementum and dentine.
PUBL-ID: r94006407
3
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Gomes, M. A. V.
MEDFORF: Wisth, P. J.
MEDFORF: Thornes, K.
MEDFORF: Bøe, O. E.
TITTEL : Skeletofacial changes by mandibular advancement using sagittal split
osteotomies.
SIDEREG: s. 87-94
SPRÅK : eng
TIDSKR.: Int J Adult Orthod Orthognath Surg
ÅR/DATO: 1993
VOLUM : 8
SAMMEND: Forty-five patients with mandibular retrognathism treated by surgical
mandibular advancement by sagittal split osteotomies were evaluated
cephalometrically before treatment, at the intermaxillary fixation
release, and 6 months postoperatively. The treatment resulted in
appreciable improvement of the mandibular retrognathism, and the
facial morphology was changed positively toward normal values. The
mandibular prognathism was accomplished by an anterior displacement
of the mandibular corpus and by a slight increase of the mandibular
corpus length. The anterior facial height and the mandibular plane
angle were increased by a clockwise rotation of the anterior segment
and a counterclockwise rotation of the posterior segment, which
consequently increased the gonial angle. These changes partly
reversed during the postfixation period. Dentoalveolar changes were
found in the position of the maxillary and mandibular incisors; both
were uprighted, the mandibular incisors more than the maxillary
incisors. In general, the long-term positive effects of the surgical
mandibular advancement re vealed great stability.
PUBL-ID: r94006569
4
Vit.konf.: Foredrag/poster med kun sammendrag i konferanserapport
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Midtbø, Marit
MEDFORF: Halse, Agnar
Universitetet i Bergen Institutt for odontologisk røntgendiagnostikk
TITTEL : Tooth crown size and morphology in Turner syndrome. (Tilknyttet
prosjekt: Dental, occlusal and craniofacial morphology in young
patients with Turner syndrome)
STED : Stockholm, Sverige
ÅR/DATO: 1993-06-08
SIDEREG: s. 453
SPRÅK : eng
TIDSKR.: European Journal of Orthodontics
FORLAG : Oxford
ISBN : 0141-5387
KONFER.: European Orthodontic Society, Congress. 69
SAMMEND: Reduced body height and absence of puberty are major problems for
Turner patients. New hormone treatment has potential to normalize the
development. AIM: To analyze permanent tooth size and morphology and
to perform asymmetry analysis between the teeth of the right and the
left side. SUBJECTS: 33 Turner syndrome patients aged 7-16.7 years,
karyotypes 45X (n=23), 45x/46XX (n=3), 46X,i(Xq) (n=3) others (n=4).
33 girls, age range 10.2-16.7 years, served as controls. METHODS: a)
Mesiodistal and buccolingual tooth crown diameters were measured on
plaster casts. b) 11 morphological traits were defined. The teeth
were scored visually on plaster casts and on intraoral slides, c)
Asymmetry was recorded from two variables: (i) Pairs of bilateral
corresponding teeth with differences in mesio-distal tooth width
exceeding 0.2mm, or (ii) morphological differences scored according
to the eleven traits. RESULTS: The mesiodistal diameter was
significantly reduced for every tooth measured except for the
maxillary canine. The bucco-lingual dimension was reduced only for
four teeth. 10 morphological traits were identified in the Turner
patients; only 7 occured in the controls. Several of the traits have
not been described earlier for this group of patients. There was a
significant difference between Turner patients and controls both in
the number of patients with asymmetry and in the number of
asymmetrical tooth pairs in the maxilla. No differences were found
between the karyotypes. Maxillary central incisors showed a
surprisingly high relative frequency (38.5%) of assymetry.
CONCLUSION: Reduced tooth crown size, certain morphologicalt raits
and bilateral asymmetry are parts of the Turner syndrome.
PUBL-ID: r94000425
PROS-ID: p94000007
5
Magistergradsarbeider
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Papagrigorakis, Manolis J.
TITTEL : Craniofacial Morphology in Ancient Greeks. Master of Science
(Dentistry) thesis.
SIDEREG: 80 s.
ISBN : 82-7249-144-3
SPRÅK : eng
ÅR/DATO: 1993
PUBL-ID: r94006722
6
Magistergradsarbeider
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Pereira, Rui
TITTEL : Face morphology of 12 year old children in Portugal. Master of
Science (Dentistry) thesis.
SIDEREG: 80 s.
ISBN : 82-7249-143-5
SPRÅK : eng
ÅR/DATO: 1993
PUBL-ID: r94006721
7
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Rygh, P.
TITTEL : How to run a postgraduate orthodontic programme.
SIDEREG: s. 161-172
SPRÅK : eng
TIDSKR.: European journal of orthodontics
ÅR/DATO: 1993
VOLUM : 15
SAMMEND: Orthodontic students should be trained in a University department;
all treatment stept being instructed and controlled. Optimal patient
records must contain all relevant information in a secure system.
Treated patients are recalled for follow-up records (e.g. 1, 2, 5, 10
years). One main Edgewise technique should be mastered very well with
any reasonable intra- and extra-oral accessory added. The Erasmus
programme provides well balanced minimum requirements for a
curriculum that should be the basis of European orthodontics.
PUBL-ID: r94006414
8
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Tindlund, R. S.
MEDFORF: Rygh, P.
MEDFORF: Bøe, O. E.
TITTEL : Intercanine Widening and Sagittal Effect of Maxillary Transverse
Expansion in Patients with Cleft Lip and Palate during the Deciduous
and Mixed Dentitions.
SIDEREG: s. 195-207
SPRÅK : eng
TIDSKR.: Cleft palate-craniofacial journal
ÅR/DATO: 1993
VOLUM : 30
ISSN : 0009-8701
SAMMEND: Since 1977 cleft lip and palate (CLP) patients with maxillary
deficiency have received an interceptive orthopedic treatment
consisting of (a) transverse expansion, (b) protraction, and (c)
fixed retention. Ideally the treatment should be completed early
enough to permit spontaneous eruption of the maxillary permanent
incisors into normal occlusion without orthodontic intervention. The
early transverse expansion considerably increases space so that
unerupted malpositioned incisors spread out spontaneously, creating
optimal conditions for eruption and root formation. Dental diagnosis
in the cleft areas is made easier. Posterior crossbites in 112 CLP
patients were expanded with a modified quad-helix appliance cemented
with four bands in the deciduous or mixed dentition. Intercanine
widening was about 3 mm per month regardless of cleft type. Several
authors have claimed that transverse expansion of theu pper jaw will
increase sagittal overjet. Other authors have not found such an
effect. The sagittal effect on the maxilla was studied in 68 CLP
patients who had received transverse ex pansion. Analysis of the
lateral cephalograms revealed no significant sagittal dentofacial
maxillary treatment effects involving forward movement of maxilla,
but a downward clockwise rot ation of the mandible was found.
EMNEORD: cephalometry, cleft lip and palate, dentofacial orthopedics,
intercanine widening, maxillary hypoplasia, maxillary transverse
expansion, posterior crossbite, quad-helix appliance
PUBL-ID: r94006419
9
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Tindlund, R. S.
MEDFORF: Rygh, P.
TITTEL : Maxillary Protraction: Different Effects on Facial Morphology in
Unilateral and Bilateral Cleft Lip and Palate Patients.
SIDEREG: s. 208-221
SPRÅK : eng
TIDSKR.: Cleft palate-craniofacial journal
ÅR/DATO: 1993
VOLUM : 30
ISSN : 0009-8701
SAMMEND: Since 1977 patients with anterior/posterior crossbites in the care of
the Bergen CLP team have undergone an interceptive orthopedic
protraction phase during the deciduous and mixed dentition period.
Eighty-seven cases with complete clefts (63 unilateral and 24
bilateral) displaying anterior crossbite (negative overjet) were
treated to normal occlusion. A fixed quadhelix appliance was used in
combination with a facial mask. In the unilateral complete cleft lip
and palate (UCLP) group, mean age at start of treatment was 6 years
10 months and mean duration was 12 months.In the bilateral complete
cleft lip and palate (BCLP) group, mean age at start of treatment was
7 years and mean duration 15 months. The protraction forcewas 700 g.
The sagittal changes during protraction in the UCLP and BCLP groups
were compared, and related to the growth changes in a group of
noncleft children at the same age. Dentof acial treatment effect was
different in the UCLP and BCLP groups. Significant increase of
maxillary prognathism (angle s-n-ss) was found only in the UCLP
group, whereas the treatmenteffect in the BCLP group was mainly
dentoalveolar. However, after protraction there was no longer a
significant difference in maxillary prognathism between the two CLP
groups, and the sagittal position of the upper molars was normalized
in both groups. The upper incisors remained retroclined in both
groups, significantly more in the BCLP group. Increase of the upper
facial height (n-sp") and clockwise rotation of the occlusal line
were significantly greater in the BCLP group. The computerized
occlusal line was unsuitable as a reference standar d for the
evaluation of sagittal dentofacial treatment changes when the
occlusal line was rotated during treatment.
EMNEORD: anterior crossbite, cephalometrics, cleft lip and palate, dentofacial
orhtopedics, interceptive orthodontic treatment, longitudinal
dentofacial growth and development, maxillary hypoplasia, maxillary
protraction, maxillary retrusion
PUBL-ID: r94006420
10
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Tindlund, R. S.
MEDFORF: Rygh, P.
MEDFORF: Bøe, O. E.
TITTEL : Orthopedic Protraction of the Upper Jaw in Cleft Lip and Palate
Patients during the Deciduous and Mixed Dentition Periods in
Comparison with Normal Growth and Development.
SIDEREG: s. 182-194
SPRÅK : eng
TIDSKR.: Cleft palate-craniofacial journal
ÅR/DATO: 1993
VOLUM : 30
ISSN : 0009-8701
EMNEORD: anterior crossbite, cephalometrics, cleft lip and palate, dentofacial
orthopedics, interceptive orthodontic treatment, longitudinal
dentofacial growth and development, maxillary hypoplasia, maxillary
protraction, maxillary retrusion
PUBL-ID: r94006418
11
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - kjeveortopedi
FORF. : Tindlund, R. S.
MEDFORF: Rygh, P.
TITTEL : Soft-Tissue Profile Changes during Widening and Protraction of the
Maxilla in Patients with Cleft Lip and Palate Compared with Normal
Growth and Development.
SIDEREG: s. 454-468
SPRÅK : eng
TIDSKR.: Cleft palate-craniofacial journal
ÅR/DATO: 1993
VOLUM : 30
ISSN : 0009-8701
EMNEORD: anterior crossbite, cephalometrics, cleft lip and palate, dentofacial
orthopedics, interceptive orthodontic treatment, longitudinal
dentofacial growth and development, maxillary hy poplasia, maxillary
protraction, maxillary retrusion, maxillary transverse expansion,
posterior crossbite, soft-tissue profile
PUBL-ID: r94006422