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- Rizell, Sara, 1963, et al.
(författare)
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Functional appliance treatment outcome and need for additional orthodontic treatment with fixed appliance.
- 2006
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Ingår i: Swedish dental journal. - 0347-9994. ; 30:2, s. 61-8
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Tidskriftsartikel (refereegranskat)abstract
- The objectives of this study were to investigate (1) the results of treatment with functional appliances in mixed dentition run by general practitioners, (2) factors associated with a final treatment result of overjet of > or = 5 mm and (3) the need of additional treatment with fixed appliances. The study was designed as a retrospective, cross sectional survey and conducted in one of the Public Dental Clinics and the Orthodontic Clinic in Lidk?ping, Sweden. 122 patients (aged 7.6 -13.2 years) with an overjet of > or = 7 mm and consecutively collected for treatment with functional appliance therapy. Patient files were analysed with regard to gender, age, initial class II severity, type of functional appliance, co-operation, overall growth, number of missed appointments and treatment time. The treatment results were studied and correlated with the above-mentioned variables. The need for additional treatment with fixed appliances was evaluated. A final overjet of < or = 5 mm was observed in 61.5% of the patients, 48.4% interrupted treatment prematurely and 33.6% received additional treatment with fixed appliances. Good co-operation and extended treatment time was found to be correlated with a final overjet of < or = 5 mm. Other factors not associated with treatment outcome were age, gender, overjet, overbite, molar relation, type of functional appliance, overall growth and number of missed appointments. Activator treatment was successful in reducing overjet to 5 mm or less in almost two thirds of the treated patients. Mainly because of poor functional appliance treatment results or relapse, one third of the patients were retreated with fixed appliance. Since good co-operation is one of the main factors for successful treatment outcome, evaluation of the motivational level of both the parents and the patient before treatment start is crucial.
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| 2. |
- Sabel, Nina, 1973, et al.
(författare)
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Elemental composition of normal primary tooth enamel analyzed with XRMA and SIMS.
- 2009
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Ingår i: Swedish dental journal. - 0347-9994. ; 33:2, s. 75-83
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Tidskriftsartikel (refereegranskat)abstract
- There is an interest to analyze the chemical composition of enamel in teeth from patients with different developmental disorders or syndromes and evaluate possible differences compared to normal composition. For this purpose, it is essential to have reference material. The aim of this study was to, by means of X-ray micro analyses (XRMA) and secondary ion mass spectrometry (SIMS), present concentration gradients for C, O, P and Ca and F, Na, Mg, Cl, K and Sr in normal enamel of primary teeth from healthy individuals. 36 exfoliated primary teeth from 36 healthy children were collected, sectioned, and analyzed in the enamel and dentin with X-ray micro analyses for the content of C, O, P and Ca and F, Na MgCl, K and Sr. This study has supplied reference data for C, O, P and Ca in enamel in primary teeth from healthy subjects. No statistically significant differences in the elemental composition were found between incisors and molars.The ratio Ca/P is in concordance with other studies. Some elements have shown statistically significant differences between different levels of measurement. These results may be used as reference values for research on the chemical composition of enamel and dentin in primary teeth from patients with different conditions and/or syndromes.
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