1
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - periodonti
FORF. : Grant, D. A.
MEDFORF: Lie, T.
MEDFORF: Clark, S. M.
MEDFORF: Adams, D. F.
TITTEL : Pain and Discomfort Levels in Patients During Root Surface
Debridement With Sonic Metal or Plastic Inserts.
SIDEREG: s. 645-650
SPRÅK : eng
TIDSKR.: Journal of periodontology
ÅR/DATO: 1993
VOLUM : 64
ISSN : 0022-3492
SAMMEND: The study was designed to evaluate whether root surface debridement
with a sonic scaler plastic insert would cause less pain and
discomfort to patients than an ordinary, probe-shaped metal sonic
insert. One quadrant in each of 23 patients was debrided with each
insert. Blood pressure, mean arterial pressure, and heart rate were
monitored before, during, and immediately after each treatment. Pain
was also evaluated on a visual analogue scale (VAS) after each
treatment, as well as 2 weeks later following pain-provoking stimuli.
Blood pressure, mean arterial pressure, and heart rate did not reveal
any differences between quadrants treated with plastic or metal
inserts. Heart rate had a weak, positive association with treatment
time. The VAS gave a higher pain score for the plastic (30.8) than
for the metal insert (24.4), but this difference was not
statistically significant (P=0.055). Following pain-provoking stimuli
at the 2-week follow-up visit, quadrants debrided with the metal
insert (31.3) scored significantly lower (less pain)(P<0.01) on the
VAS than quadrants treated with the plastic insert (30.7). It is
concluded that the sonic metal insert caused less pain and discomfort
to the patients due to its superior accessibility and water spray
cooling. The significant difference between metal and plastic tip
debrided quadrants at the follow-up visit was probably caused by the
smearing effect of the metal insert with partial closure of the
dentin tubule orifices.
EMNEORD: scaling/instrumentation, scaling/methods, pain/prevention and
control, dentin, sensitive, blood pressure, heart rate
PUBL-ID: r94006544
2
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - periodonti
FORF. : Grevstad, H. J.
TITTEL : Doxycycline prevents root resorption and alveolar bone loss in rats
after periodontal surgery.
SIDEREG: s. 287-291
SPRÅK : eng
TIDSKR.: Scandinavian journal of dental research
ÅR/DATO: 1993
VOLUM : 101
ISSN : 0029-845X
SAMMEND: The effect of systemic doxycycline administration on frequency of
root resorption cavities and extent of bone loss following
periodontal surgery was studied in albino rats. ThirtyWistar rats
with healthy gingiva were divided into four groups. Six untreated
animals (Group 1) served as controls. Gingivectomy (Group 2, six
rats), mucoperiosteal flap operation (Gro up 3, eight rats), and
mucoperiosteal flap operation with doxycycline added to the drinking
water (Group 4, 10 rats) were performed on the palatal aspect of
maxillary left molars. Af ter a healing period of 3 wk, the rats were
killed by an overdose of sodium pentothal, and specimens of first
molars were prepared for light microscopy. Root resorption was absent
innormal and gingivectomized animals (Groups 1 and 2). Resorption
cavities occurred in all flap-operated animals (Group 3) and in one
of 10 doxycycline-treated animals (Group 4). The di stance from
cementoenamel junction to alveolar bone crest remained unchanged in
gingivectomized (Group 2) and doxycycline-treated animals (Group 4),
as compared with control specimen s. In flap-operated animals (Group
3), the crestal bone level was located more apically than in
doxycycline-treated rats (Group 4). This study has shown that root
resorption and bone l oss were associated with flap operations
involving exposure of periodontal ligament and bone. Systemic
doxycycline prevented both root resorption and bone loss.
EMNEORD: alveolar bone, doxycycline, light microscopy, molar, periodontal
surgery, rat, resorption
PUBL-ID: r94006543
3
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - periodonti
FORF. : Grevstad, H. J.
TITTEL : Effect of subperiosteally implanted polytetrafluoroethylene (PTFE)
material on alveolar bone in the rat.
SIDEREG: s. 224-228
SPRÅK : eng
TIDSKR.: Scandinavian journal of dental research
ÅR/DATO: 1993
VOLUM : 101
ISSN : 0029-845X
SAMMEND: The aim of this study was to examine the effect on osteocytes after
subperiosteal implantation of polytetrafluoroethylene (PTFE) material
in the rat maxilla. In four young conventi onal albino rats,
mucuoperiosteal flaps were elevated by sulcular incision, and segment
(1x4mm) of PTFE material were implanted between bone and flap tissue.
After a healing periodof14 days, specimens containing implants and
adjacent bone were processed for transmission electron microscopy.
The specimens were stepwise reduced to obtain a total of 16 levels
for thin sectioning. Osteocytes (n=640) in alveolar bone underlying
implanted material (region 1) and adjacent bone (region 2) were
studied to determine the ratio of intact to degenerated cells. In
alveolar bone covered by implanted material (region 1) and adjacent
bone (region 2). 56% and 16% of the osteocytes, respectively, showed
distinct signs of necrocytosis. Th is study has shown that
subperiosteal placement of PTFE material results in partial necrosis
of superficial alveolar bone.
EMNEORD: alveolar bone, implant, osteocytes, pathology, periodontal surgery,
polytetrafluoroethylene, rat, transmission electron microscopy
PUBL-ID: r94006542
4
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - periodonti
FORF. : Grevstad, H. J.
MEDFORF: Leknes, K. N.
TITTEL : Ultrastructure of plaque associated with polytetrafluoroethylene
(PTFE) membranes used for guided tissue regeneration.
SIDEREG: s. 193-198
SPRÅK : eng
TIDSKR.: Journal of clinical periodontology
ÅR/DATO: 1993
VOLUM : 20
ISSN : 0303-6979
SAMMEND: The purpose of the study was to examine the ulstrastructure of plaque
contaminating polytetrafluoroethylene (PTFE) membranes used for
guided periodontal tissue regeneration. 8 patients treated with
GoreTex (R) membranes received daily antibiotics (650 mg x 2 Femepen
(R)) and rinsed with 10 ml 0.2% chlorhexidine during a healing period
of 30 days. Following retrieval, the membranes were processed for
electron microscopy. External aspects of 12 portions from 4 partially
exposed membranes were selected for detailed ultrastructural
examination. The plaque-membrane interface was characterized by the
presence of fibrin or discontinuous accumulation of intermicrobial
matrix. Adjacent plaque-free areas of membrane surface exhibited no
detectable electron-dense material. 3 structurally different groups
of bacterial aggregations were observed on the strips: (i) dense
layers of gram-positive cocci and rods do minated the external aspect
of the open microstructure portion; (ii) cocci, rods and filamentous
microorganisms embedded in fibrin filled the spaces of the open
microstructure; (iii) a loosely arranged mixed microbiota consisting
of gram-positive cocci and rods as well as of gram-negative
microorganisms and spirochetes were present on the occlusive portion.
Areas with morphologically intact bacteria alternated with areas with
empty bacterial cell walls. One specimen also displayed degenerated
Candida-like blastospores. This study shows that o ral
micro-organisms may colonize and extensively invade the open
microstructure of PTFE material and that adhesion of plaque to the
membrane surface is mediated either by fibrin or a discontinuous
layer of intermicrobial matrix.
EMNEORD: guided tissue regeneration, periodontal surgery, plaque,
polytetrafluoroethylene, transmission electron microscopy
PUBL-ID: r94006565
5
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - periodonti
FORF. : Knight, N. K.
MEDFORF: Lie, T.
MEDFORF: Clark, S. M.
MEDFORF: Adams, D. F.
TITTEL : Hypersensitive Dentin: Testing of Procedures for Mechanical and
Chemical Obliteration of Dentinal Tubuli.
SIDEREG: s. 366-373
SPRÅK : eng
TIDSKR.: Journal of periodontology
ÅR/DATO: 1993
VOLUM : 64
ISSN : 0022-3492
SAMMEND: The study examined by scanning electron microscopy the effect of
various mechanical and chemical procedures in obliterating dentinal
tubuli. Dentin blocks containing open, cross-sectioned dentinal
tubuli were separated into one experimental and one control area. The
mechanical treatments consisted of 20 seconds of continuous
instrumention with sharp and dull curets, finely textured inserts for
the EVA reciprocating handpiece, metal and plastic inserts for a
sonic scaler, and metal inserts for an ultrasonic scaler. Chemical
treatments included a light-cured dental resin and active
obliterating agents including sodium,stannous and hydrogen fluorides,
potassium oxalate, glycerin, ferric oxalate, and potassium nitrate.
These substances were applied to the test surfaces for 2 minutes and
allowed to dry. One half of the chemically treated specimens were
then sprayed with water in order to evaluate the retention of the
obliterating agents. The results revealed that among the mechanical
treatments, the sharp curet gave the most consistent and complete
obliteration of the tubuli. The plastic inserts had no tubular
occluding effects. Among the chemical procedures, the light-cured
resin resulted in the most complete obliteration of the tubuli, while
the fluoride agents and glycerin had no effect. It can be
hypothesized that combining instrumentation with a sharp curet
causing a heavy smear layer and occlusion of tubuli apertures,
followed by application of a light body resin, may prove to be a
rational method of desensitizing hypersensitive dentin surfaces.
However, this combined treatment should be evaluated in clinical
trials .
EMNEORD: dentin, sensitive, planing
PUBL-ID: r94006546
6
Magistergradsarbeider
INSTIT.: UiB-Odont: Odont. inst. - periodonti
FORF. : Nunes, I. P.
TITTEL : The epithelial expression of HLA class II antigens and receptors for
IgG in patients with adult periodontitis. Master of Science
(Dentistry) thesis.
UTGIV. : Dep. of Periodontology, Dep. of Microbiology and immunology,
Pathology and Forensic Odontology, Lab. for Microbiology School of
Dentistry and Medicine.
SIDEREG: 92 s.
ISBN : 82-7249-142-7
SPRÅK : eng
ÅR/DATO: 1993
PUBL-ID: r94006549
7
Vit. artikler i internasjonale tidsskrift, referee-tjeneste (ISSN)
INSTIT.: UiB-Odont: Odont. inst. - periodonti
FORF. : Takacs, V. J.
MEDFORF: Lie, T.
MEDFORF: Perala, D. G.
MEDFORF: Adams, D. F.
TITTEL : Efficacy of 5 Machining Instruments in Scaling of Molar Furcations.
SIDEREG: s. 228-236
SPRÅK : eng
TIDSKR.: Journal of periodontology
ÅR/DATO: 1993
VOLUM : 64
ISSN : 0022-3492
SAMMEND: The scaling efficacy of machining instruments was studied in the
furcations of 100 extracted molars. The molars were divided into 5
groups with similar furcation anatomy, painted w ith artificial
calculus, partly submerged in stone blocks, and the furcation
entrances covered with a heavy rubber dam material. Ten mandibular
and 10 maxillary molars were scaled byan experienced operator with
each of the following instruments/inserts: ultrasonic instrument with
either a prototype ball point insert or with a new pointed insert;
ultrasonic instrument with a ball point insert; reciprocating
handpiece with new inserts for furcations; and a sonic scaler with a
universal insert. The molar groups were coded and graded in a stereom
icroscope by 2 independent examiners, and the rankings were tested
with the Kruskal-Wallis test and the multiple comparisons between
treatments test. The results revealed statistically significant
differences between the instruments as well as between different
topographical areas of the furcations. The sonic scaler with a
universal insert and the ultrasonic instrument with ball point
inserts were significantly more efficient (P<0.05) than the
reciprocating handpiece with inserts in most of the areas studied.
For mandibular molars, significantly better results (P<0.05) were
obtained for lingual furcation entrances than for furcation roofs.
For maxillary molars, significantly better results (P<0.05) were
obtained for distal and buccal entrance areas than for furcation
roofs and inside of mesial roots. The present study may give some
guidance to the practitioner in choosing machining instrumetns for
fur cation cleaning as well as identifying the most difficult
topographical areas to instrument.
EMNEORD: furcation/therapy, dental calculus/prevention and control,
ultrasonics, scaling/instrumentation, dental instruments
PUBL-ID: r94006545