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- Abrahamsson, Cecilia, et al.
(author)
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Alterations of temporomandibular disorders before and after orthognathic surgery
- 2007
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In: Angle orthodontist. - : Angle Orthodontist. - 0003-3219 .- 1945-7103. ; 77:4, s. 729-734
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Research review (other academic/artistic)abstract
- OBJECTIVE: To answer the question whether orthognathic surgery does affect the prevalence of signs and symptoms of temporomandibular disorders (TMDs). MATERIALS AND METHODS: A literature survey in the PubMed and Cochrane Library electronic databases was performed and covered the period from January 1966 to April 2006. The inclusion criteria were controlled, prospective or retrospective studies comparing TMDs before and after orthognathic surgery in patients with malocclusion. There were no language restrictions, and three reviewers selected and extracted the data independently. The quality of the retrieved articles was evaluated by four reviewers. RESULTS: The search strategy resulted in 467 articles, of which 3 met the inclusion criteria. Because of few studies with unambiguous results and heterogeneity in study design, the scientific evidence was insufficient to evaluate the effects that orthognathic surgery had on TMD. Moreover, the studies had problems with inadequate selection description, confounding factors, and lack of method error analysis. CONCLUSION: To obtain reliable scientific evidence, additional well-controlled and well-designed studies are needed to determine how and if orthognathic surgery alters signs and symptoms of TMD.
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- Bondemark, Lars, et al.
(author)
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A Self-directed Summative Examination in Problem-based Learning in Dentistry : a New Approach
- 2004
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In: Medical teacher. - : Informa UK Limited. - 0142-159X .- 1466-187X. ; 26:1, s. 46-51
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Journal article (other academic/artistic)abstract
- This paper describes and evaluates a new method of assessment in PBL, which was developed with two cohorts of dental students. The method involves students in PBL groups designing PBL problems and assessment tasks that are in line with the objectives of the course and the principles of PBL. Construction of tasks and feedback were provided. The student groups based the summative assessment on a selection of the PBL assessments provided. The evaluation indicates that senior students are capable of designing challenging PBL assessment tasks that are in line with course objectives and PBL principles. This experience raised the pass rates of the students compared those of with earlier cohorts of students. The students rated the method favourably; they considered it enabled them to demonstrate their competences and that it was more closely in line with PBL principles than other methods of assessment that they had experienced. The method is a promising innovation, which could be used in a variety of PBL courses.
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- Bondemark, Lars, et al.
(author)
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A Systematic Review of Swedish Research in Orthodontics during the Past Decade.
- 2005
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In: Acta Odontologica Scandinavica. - : Informa Healthcare. - 0001-6357 .- 1502-3850. ; 62:1, s. 46-50
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Research review (other academic/artistic)abstract
- The aims of this systematic review were to identify the study designs and topics of Swedish orthodontic articles, to elucidate their interna-tional position, and to verify in which scientific journals the articles had been published in the past decade. A search of the Medline data-base for papers published between 1992 and 2002 was made using the Medical Search Heading terms 'orthodontics', 'malocclusion', 'cepha-lometry', and 'facial bones and growth'. Two independent reviewers selected the articles of Swedish origin and categorized each article ac-cording to research design and principal topic. Overall, 15,571 articles in orthodontic research were found, and the Swedish contribution was 1.9% with the majority of these (71.5%) being submitted by universi-ties. Most of the Swedish articles (84.5%) had been published in 10 journals and many high-quality studies with orthodontic interest were published in non-orthodontic journals with higher impact factor scores than the orthodontic journals. Every second study was prospec-tive, and of these, 15 (5.2% of all Swedish articles) were randomized clinical trials (RCTs). It was found that nearly every third study, pro-spective as well as retrospective, was uncontrolled. The main classifi-cation was treatment studies (51.9%), followed by development (18.6%) and diagnostic information (10.7%) studies. Thus, the major-ity of the articles evaluated therapeutic interventions; however, al-though the RCT is the preferred study design in evaluation studies, few used this method. In an era focused on evidence-based medicine, studies with an RCT design will be the future challenge for research in the field of orthodontics.
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- Bondemark, Lars, et al.
(author)
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Anchorage Provided during Intra-arch Distal Molar Movement : a Comparison between the Nance Appliance and a Fixed Frontal Bite Plane
- 2005
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In: Angle orthodontist. - : Angle Society. - 0003-3219 .- 1945-7103. ; 75:3, s. 437-443
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Journal article (other academic/artistic)abstract
- The aim of this retrospective study was to evaluate and compare the anchorage provided with the Nance appliance (NA) and the fixed frontal bite plane (FBP) during intra-arch distal molar movement. After a sample size calculation, 20 patients were recruited and randomly selected for each group from patients who fulfilled the following criteria: use of an intra-arch Ni-Ti coil appliance with either NA or FBP to provide anchorage during a six-month molar distalization period, no orthodontic treatment before molar distalization, and first and second maxillary molars in occlusion. The outcome measures assessed were anchorage loss, ie, anterior movement of maxillary central incisors, distal movement of maxillary molars, and bite opening effect. The mean age in the NA group was 14.7 years (SD 1.09) and in the FBP group 15.0 years (SD 0.99). The data revealed that the maxillary central incisors moved anteriorly 1.4 mm in the NA group and 1.9 mm in the FBP group. The difference in anchorage loss was not significant. The mean amount of molar distalization within the maxilla was 1.7 mm in the NA group and 1.8 mm in the FBP group. In both groups, the overbite was significantly reduced and the overbite was decreased significantly more in the FBP group. Because neither the NA nor FBP provided stable anchorage, a second treatment phase is recommended to reverse the anchorage loss after distal molar movement. If molar distalization is planned in deep bite cases, the FBP is the anchorage system of choice.
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- Bondemark, Lars, et al.
(author)
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Extraoral vs intraoral appliance for distal movement of maxillary first molars : a randomized controlled trial
- 2005
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In: Angle orthodontist. - : Angle Society. - 0003-3219 .- 1945-7103. ; 75:5, s. 699-706
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Journal article (other academic/artistic)abstract
- Using randomized controlled trial methodology, the aim of this study was to evaluate and compare the treatment effects of an extraoral appliance (EOA) and an intraoral appliance (IOA) for distal movement of maxillary first molars. A total of 40 patients (mean 11.5 years, SD 1.29) at the Orthodontic Clinic, National Health Service, Skane County Council, Malmö, Sweden, were randomized to receive treatment with either extraoral traction (cervical headgear) or an IOA us-ing superelastic coils for distal movement of maxillary first molars. The inclusion criteria were a nonextraction treatment plan, a Class II molar relationship and maxillary first molars in occlusion with no erupted maxillary second molars. The outcome measures to be assessed in the trial were treatment time, cephalometric analysis of distal molar movement, anterior movement of maxillary central incisors, ie, anchorage loss and sagittal and vertical skeletal positional changes of the maxilla and mandible. In the IOA group, the molars were distalized during an average time of 5.2 months, whereas in the EOA group the corresponding time was 6.4 months (P < .01). The mean amount of distal molar movement was significantly higher in the IOA than in the EOA group, three mm vs 1.7 mm (P < .001). Moderate anchorage loss was produced with the IOA implying increased overjet (0.9 mm) whereas the EOA created decreased overjet (0.9 mm). It can be concluded that the IOA was more effective than the EOA to create distal movement of the maxillary first molars.
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| 9. |
- Bondemark, Lars, et al.
(author)
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RCTs are here to stay : Reply
- 2016
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In: European Journal of Orthodontics. - : Oxford University Press. - 0141-5387 .- 1460-2210. ; 38:3, s. 335-335
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Journal article (other academic/artistic)
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| 10. |
- Bondemark, Lars, et al.
(author)
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Separation Effect and Perception of Pain and Discomfort from two Types of Orthodontic Separators.
- 2004
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In: World Journal of Orthodontics. - 1530-5678 .- 1941-6741. ; 5:2, s. 172-176
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Journal article (other academic/artistic)abstract
- AIM: To examine two types of orthodontic separators, focusing on the separating effect and patients' perception of pain and discomfort. METHODS: The separators tested were spring-type and elastomeric separators. Thirty teenagers participated, and all were scheduled for treatment with a fixed orthodontic appliance. Two spring-type and two elastomeric separators were placed alternately in the left or the right quadrant. After a separation period of 5 days, the amount of separation was measured with a leaf gauge. Nine questionnaires with visual analogue scales and questions with fixed answers were used to register the patient perceptions. RESULTS: The mean separation was 0.3 mm for the spring-type and 0.4 mm for the elastomeric separators (P < .05). The springs were considered less painful than the elastomerics, but the difference was not statistically significant. For both separators, the pain was worst at day 2 and subsided almost completely by day 5. Due to pain, 14 of the 30 patients changed their food habits, and 13 took analgesics. CONCLUSIONS: The separation effect of the two separators was considered clinically equivalent and since pain of moderate intensity occurs during the separation period, analgesics and soft food can be recommended.
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