Search PubMed⌕ Search

Biomedical subjects

A Hasund

Publications and source records attributed to A Hasund.

At least 19 recordsLinked to original sources
PubMed2001

Prognosis of facial growth in patients with unilateral complete clefts of the lip, alveolus and palate.

AIM: Unfavourable facial growth in patients with cleft lip, alveolus, and palate may occur during puberty. Usually this development is not predictable in a young patient. The aim of the present study was to find an individual growth prediction at an early age that would allow us to decide whether later orthognathic surgery should be included in the treatment plan. MATERIAL AND METHODS: Lateral cephalograms of 41 patients with unilateral clefts of lip, alveolus and palate (uCLAP) with observation intervals of 4 years were computerized, correlations between the variables of the first and second radiograph were calculated and regression equations were established. RESULTS: The skeletal change of the intermaxillary relationship can be explained purely by the lack of midfacial growth. An individual prediction of the angle SNA over a period of 4 years is possible with a correlation coefficient of 0.95. Additional predictions for SNB, Holdaway angle and the index of anterior facial height proportions are demonstrated. CONCLUSION: The prediction procedure elaborated in this paper facilitates the decision at the age of 12 years already, whether or not orthodontic occlusal treatment has been successfully completed at an early age. The alternative is to limit orthodontic treatment to the simple alignment of the two dental arches independently of their intermaxillary relation, and then to correct the facial skeleton and the dental occlusion simultaneously by combining surgical and orthodontic treatment after the completion of growth.

Adolescent↗
PubMed1993

Nasal airway, lip competence, and craniofacial morphology.

The aim of the present investigation was to demonstrate whether children selected by their open lip posture show differences in their nasal airway resistance and facial morphology compared to children with closed lip closure. Thirty-two children with poor lip competence were compared to a control group of 20 with secure mouth closure. Patients with poor lip competence showed a significantly higher ML-NSL angle and also ML-NL angle. Anterior rhinomanometry, as well as measurements of the pharyngeal space on lateral headfilms, displayed no significant differences between the two groups. The same material was also grouped cephalometrically into skeletal open and skeletal deep bite configurations. The mean value of the nasal airway passage was lower in the skeletal open group, but not at a significant level.

Airway Resistance↗
PubMed1989

[Recent comparative statistical correlation studies on predicting the space requirement of the cuspid and bicuspid region using multiple regression comparisons].

The purpose of the investigation was to develop multiple regression equations to calculate the space requirements in the canine and premolar regions. The investigation was based on study models from a group of 63 (36 males and 27 females) patients with an ideal Angle class I occlusion. The mesiodistal width of unerupted incisors and the buccolingual and mesiodistal width of first molars were used as independent variables. A test group of 64 study models (32 males and 32 females) from orthodontically treated patients was used to represent the malocclusions typically present in an orthodontic clinic or practice. The space requirement can be predicted from three variables in both upper and lower jaws. The inclusion of more variables does not significantly improve the prediction. The correlation coefficient for the buccolingual width of the first lower molar was significantly higher than that for the mesiodistal width. The combination of 22, 32 and 36 (buccolingual) achieved the highest correlation coefficient in both groups. Further, if at the time of analyses, one of the canines or premolars (33, 34 or 24) has erupted their width may be included as an additional independent variable. The correlation and regression coefficients for males and females showed no significant difference.

Bicuspid↗
PubMed1985

Morphologic characteristics of the Alaskan Eskimo dentition: IV. Cusp number and groove patterns of mandibular molars.

Data on the permanent dentition of 63 coastal and 33 inland Alaskan Eskimos are presented. The number of cusps and groove pattern of the mandibular molars were recorded. Agenesis of the mandibular third molars was classified and the mesiodistal and buccolingual crown diameter was measured on the first and the second mandibular molars. The predominant pattern of the lower first molars was Y5, while for the second molar the dominating patterns were +5 and +4. In the lower third molar, +5 was found in the majority of cases. For M1 and M2, men showed a stronger tendency toward a conservative pattern than did women. In the case of M2, the inland population exhibited a more conservative trait than did the coastal population. No connection was seen between the groove pattern and agenesis of M3, however, a reduction in the mesiodistal crown diameter for the second molars was seen when the number of cusps is reduced from 5 to 4.

Alaska↗
PubMed1982

The labio-lingual position of the lower incisors in individuals with ideal occlusion. A study on medieval skulls.

In a sample of 73 Norwegian medieval skulls with ideal, occlusion measurements were taken directly on the dental arches and on lateral cephalograms. The configuration of the lower face and the position of the incisors were different from modern Norwegian adults. Consequently the material could be used to verify a linear relationship between the position of the lower incisors and some guiding variables. The principles of a guiding multiple linear equation as used in the Bergen cephalometric analysis was confirmed. Further, it was shown that the group of guiding variables related to the position of the lower incisors could be extended by introducing dental arch dimensions.

Adult↗
PubMed1980

Floating norms as guidance for the position of the lower incisors.

1. The incisor position should be evaluated in relation to the sagittal and vertical configurations of the face, as well as to the shape of the bony chin. 2. A floating norm for the positioning of the lower incisors is established based upon the guiding variables ANB, ML-NL and the N angle with the introduction of a multiple regression equation. The anticipated values for the guiding variables at the end of the treatment are used in the calculation.

Adult↗