| 1. |
- Bondemark, Lars, et al.
(författare)
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An updated systematic review regarding early Class II malocclusion correction
- 2019
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Ingår i: Journal of the World Federation of Orthodontists. - : Elsevier. - 2212-4438. ; 8:3, s. 89-94
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Forskningsöversikt (refereegranskat)abstract
- Background and aim: Class II malocclusion is one of the most common malocclusions in young children and a great deal of research on this topic has been undertaken. Despite this, there are still knowledge gaps on whether it is effective to treat these malocclusions early or what type of treatment should be performed. The aim of this article was to systematically review and update the quality of evidence for various treatment modalities considering Class II malocclusion correction before 10 years of age and with a focus on improvement of dental and skeletal relationships, soft tissue profile, relation to temporomandibular disorder (TMD), incidence on dental trauma, cost-effectiveness, and quality of life. Material and methods: Four databases were searched, from January 1960 to April 2019. Inclusion criteria were randomized or controlled trials reporting short- or long-term effects on dental or basal relationships, soft tissue profile, associations to TMD, quality of life, incidence of trauma, or costs. The quality of evidence was scored according to Grading of Recommendations Assessment Development and Evaluation. Results: A total of 300 publications were identified and 23 satisfied the inclusion criteria for full evaluation. The quality of evidence was high in 5 trials, moderate in 3, and low in 15. Conclusions: From the short- term perspective, there is a high level of evidence that early treatment reduces overjet and improves the anterior-posterior skeletal relationship. There is insufficient evidence about whether early treatment can reduce the incidence of trauma, is cost-effective, provides improved soft tissue profile, improves oral healtherelated quality of life, or possesses a risk of developing TMD. (C) 2019 World Federation of Orthodontists.
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| 2. |
- Westerlund, Anna, 1970, et al.
(författare)
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Bonded retainers maintain a high-standard orthodontic treatment outcome long term
- 2015
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Ingår i: Journal of the World Federation of Orthodontists. - : Elsevier BV. - 2212-4438. ; 4:2, s. 78-84
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Tidskriftsartikel (refereegranskat)abstract
- Background: Numerous studies have demonstrated deterioration of orthodontic treatment outcome postretention; however, few studies present results in cases still in retention long term. The aim of the present study was to evaluate orthodontic treatment outcomes in patients with teeth still in retention at 10 years post-treatment. Methods: This longitudinal study enrolled 108 children who received bonded lingual retainers after treatment with a full fixed appliance. Retainer extension and morphologic stability, as measured by weighted peer assessment ratings (wPAR), were recorded at pretreatment (t0), immediately post-treatment (t1), 5 years post-treatment (t5), and 10 years post-treatment (t10). The t10 results were compared with those from an untreated control group matched on age and sex. Post-treatment stability was additionally tested for correlation to age, sex, malocclusion, and extraction therapy. Results: At the group level, there was a significant mean reduction in wPAR of 74% at t10 (P < 0.001). Additionally, the mean wPAR was significantly better than was that in the control group. At the patient level, 57% of patients were categorized as "greatly improved." The only factor that could be correlated to post-treatment changes (from t1 to t10) was the presence of at least one bonded retainer ( P < 0.05). Conclusion: A "high standard orthodontic treatment outcome" could be maintained 10 years post-treatment by keeping the bonded retainers in both the upper and lower arches. Orthodontic patients expect the aesthetics to be maintained over time. The results from this study, that bonded lingual retainers maintain the orthodontic treatment result for 10 years, are valuable information for the clinician when giving the patients advice and recommendations regarding retainer maintenance. © 2015 World Federation of Orthodontists.
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| 3. |
- Slipchenko, Kateryna, et al.
(författare)
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CBN-based cutting tools with niobium compounds as a binder phase
- 2020
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Ingår i: 9th CIRP Conference on High Performance Cutting, HPC 2020. - : Elsevier BV. - 2212-8271. - 9781713835431 ; 101, s. 254-257
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Konferensbidrag (refereegranskat)abstract
- cBN-based materials are well known for their high chemical inertness and high performance. The variation of binder phase type and amount enable improvement of performance even more. Comprehensive investigation of the influence of type of niobium compound (NbC and NbN) as a binder phase for cBN-based materials were done. Samples were prepared by high pressure high temperature (HPHT) sintering under pressure of 7.7 GPa. Sintered samples were investigated in terms of phase composition (XRD), microstructure (SEM, EDX) and mechanical properties. Performance of investigated tools were tested in conditions of high speed machining of Inconel 718 alloy and Caldie tool steel.
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