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Biomedical subjects

O Bondevik

Publications and source records attributed to O Bondevik.

13 recordsLinked to original sources
PubMed1998

Changes in occlusion between 23 and 34 years.

The purpose of this study was to examine occlusal changes in the adult dentition. Study models made at average ages of 23 and 34 years of 64 females and 80 males of Norwegian descent were measured. None of the subjects underwent orthodontic treatment or surgery during the observation period. The means of the measured changes were small, with none exceeding 0.55 mm, and were larger in males than in females. The most obvious finding in both sexes was a decrease of up to 2.5 mm in the mandibular anterior perimeter, with very few subjects showing an increase. Significant changes were found in mandibular intercanine width and intermolar distance in both arches. A significant decrease in maxillary arch perimeter was seen in females, but with smaller values than in the mandibular arch. Overjet and overbite decreased significantly only in males. For each variable in each sex, some subjects showed decreases and others showed increases, indicating that individual prediction may be difficult. However, very few subjects demonstrated increased space in the anterior segments.

Adult↗
PubMed1995

Treatment needs following activator-headgear therapy.

The purpose of this study was to analyze the types and prevalence of malocclusions that remain to be corrected after a period of combined activator-headgear treatment. Study models of all patients who started treatment with an activator-headgear appliance in the graduate orthodontic clinic at the University of Oslo between 1972 and 1982 were screened. Patients initially judged to need a second phase of treatment and those later judged to have poor cooperation were omitted from the study. The results show that the most frequently remaining problems following activator-headgear treatment were overbite, overjet, and the presence of interdental spaces. Correction of the Class II skeletal and dental relationship was achieved in the majority of the cases. The only predictor for success was age at the time of treatment.

Activator Appliances↗
PubMed1995

Growth changes in the cranial base and the face: a longitudinal cephalometric study of linear and angular changes in adult Norwegians.

The purpose of this study was to examine the natural growth changes which occur between 22 and 33 years of age. The material consisted of two series of cephalograms of 74 females and 90 males with approximately 11 years between the two series. None of the subjects had orthodontic retainers when the first exposure was undertaken, or orthodontic treatment, or surgery during the observation period. The measurements were carried out by using a modified Dentofacial Planner program SHORT, and both linear and angular measurements were made. The overall changes were an increase in anterior facial height which mostly occurred in the lower face, and an increase in the length of the mandible. These changes were statistically significant in both genders. The females also had a significant posterior rotation of the mandible. There was a significant decrease in the thickness of the upper lip both in females and males, and the males had a significant increase in thickness of the soft tissue on the mandibular profile. Although there were some statistical changes in the observation period, none of the linear changes exceeded 1.35 mm. The largest angular change was a 1.44 degrees retroclination of the upper incisors in females. The differences between the genders were statistically significant only in three angular and two soft tissue measurements.

Adult↗
PubMed1991

How effective is the combined activator-headgear treatment?

The frequency and possible causes of failure and success with the combination activator-headgear as the sole appliance was analysed retrospectively in 32 girls and 46 boys. The subjects comprised all the patients who started treatment with this combination in the postgraduate courses in 1972-82 at the Orthodontic Department of the University of Oslo, and where fixed appliances were not included in the initial treatment plan. Only 14 subjects completed the treatment with entirely satisfactory results according to strict criteria set for an acceptable standard. Among the most co-operative patients less than 50 per cent ended with entirely satisfactory results, and no one with decreasing or poor co-operation had a satisfactory result. Neither sex, treatment time, nor ossification of the ulnar sesamoid bone seemed to influence the results significantly.

Activator Appliances↗
PubMed1990

[Does orthodontic treatment affect craniofacial growth?].

Orthodontic treatment can influence growth of maxilla and mandible, and give better harmony of the skeletal components of the face. However, choice of an inappropriate treatment method can deteriorate the balance of the upper and lower face. It is probably easier to influence the sutural growth than the growth of the condylar cartilage. It is possible both to increase the width of the maxilla and to increase, respectively decrease, forward growth of the maxilla. Even if the amount of growth in the condyle cannot be significantly influenced, the position of the mandible in relation to the rest of the face can be indirectly influenced by control of the sutural growth.

Child↗
PubMed1989

Traumatic ulcers and pain in adults during orthodontic treatment.

In the present investigation the frequency of oral ulcers and pain in 79 adults orthodontic patients was recorded. Only four of all patients had never had oral ulceration during treatment, but 83% of the patients characterized the trouble as minor. About 47% of the patients said that ulcers caused by the fixed appliance were the most annoying part of the treatment, and 38% said that activation of the appliance caused the most discomfort. In about 63% of the patients there was less pain when the treatment had lasted for some months, and in 24% there was no significant change in the discomfort. The pain following activation lasted for only 2-3 days (71%), but 20% had pain for more than 3 days, and five individuals felt pain constantly. The recurrence of aphthous ulceration (RAU) was not significantly affected during the orthodontic treatment, and in only one case was there an increase in the occurrence of herpes labialis.

Adult↗
PubMed1987

Traumatic ulcers and pain during orthodontic treatment.

In the present investigation the frequency of oral ulcers and pain in 161 orthodontic patients was recorded. Of all patients, 95% had experienced pain, but 84.5% said that the pain lasted a few days only. About 11% maintained that the treatment was constantly painful. Significantly more patients coming from private clinics complained of pain than those attending treatment at the Department of Orthodontics. About 50% said that activating or changing archwire was most annoying, whereas 28.7% said ulceration and 21% said headgear was the most annoying part of the treatment. According to 75% of the patients, sleeping habits were not influenced. Only eight patients reported truancy, and seven of these had done this only once. Of all patients, 6.2% had requested interim visits. Small wounds caused by the fixed appliance were reported by 75.8% of the patients, and 2.5% had suffered badly from ulceration caused by the fixed appliances. More girls than boys reported ulceration. There was a significant sex difference as regards recurrent aphthous ulceration (RAU). Increase in the frequency of RAU was reported by 23.1% of the girls and 9.6% of the boys while they had fixed appliances.

Activator Appliances↗
PubMed1978

Experimental Candida-induced denture stomatitis in the Wistar rat.

An experimental model of yeast-induced denture stomatitis has been set up in the rat by inoculating Candida albicans on the fitting side of a maxillary acrylic plate retained by an orthodontic band around the incisors. Thirty-eight Wistar rats were used in two series of experiments with an observation period of 2 weeks. In each of the series there were one control and three experimental groups. Control rats were left untreated, while rats of the experimental groups wore either uninoculated or inoculated plates, or had their palatal mucosa smeared with the yeast. For cytologic examination the palate was scraped in Series I and the fitting side of the plate in Series II. After 1 week a generalized simple inflammation had developed in the palate of most animals of the experimental groups. It was most severe and persistent in rats with inoculated plates. Histologic signs of inflammation and hyphal formation were also most pronounced in this group. Hyphae did not invade the epithelium. Except for an initial loss of body weight, which was restored by day 10 or 12, the rats tolerated their plates. The Wistar rat seems to be well suited for experimental studies on denture stomatitis.

Animals↗