| 1. |
|
|
| 2. |
- Antonarakis, Gregory, et al.
(författare)
-
Bite force and its association with stability following Class II/1 functional appliance treatment
- 2013
-
Ingår i: European Journal of Orthodontics. - : Oxford University Press (OUP). - 0141-5387 .- 1460-2210. ; 35:4, s. 434-441
-
Tidskriftsartikel (refereegranskat)abstract
- The aims of this study were to investigate the value of pre-treatment maximal molar bite force as a predictive variable in determining post-treatment changes and stability following functional appliance treatment in Class II malocclusion children. Twenty-eight Class II malocclusion children having undergone functional appliance treatment were followed for at least 1 year post-treatment. Maximal molar bite force measurements, lateral cephalograms, and study casts were taken before treatment, after treatment, and after post-treatment follow-up. Relationships between pre-treatment maximal molar bite force and dental or cephalometric changes post-treatment were examined. Patients were divided into stable and unstable groups, based on dental sagittal changes (overjet and molar relationship), and differences between the two groups of patients determined. Post-treatment changes varied widely. Thirteen children showed dentoalveolar sagittal relapse, namely a shift in molars towards a Class II relationship and an increase in overjet, while 15 did not. The unstable group demonstrated a lower pre-treatment maximal molar bite force, as well as a more obtuse gonial angle, than the stable group. The gonial angle was found to be negatively correlated to maximal molar bite force and may thus be a cephalometric indicator partly reflecting the functional condition of the masticatory muscles. Children with a lower pre-treatment maximal molar bite force were more prone to dentoalveolar sagittal relapse following functional appliance treatment.
|
|
| 3. |
- Antonarakis, Gregory, et al.
(författare)
-
Predictive value of molar bite force on Class II functional appliance treatment outcomes
- 2012
-
Ingår i: European Journal of Orthodontics. - : Oxford University Press (OUP). - 0141-5387 .- 1460-2210. ; 34, s. 244-249
-
Tidskriftsartikel (refereegranskat)abstract
- Sagittal intermaxillary changes brought about by functional appliances show large inter-individual variation. One factor that may in part explain these differences is the masticatory musculature and its functional capacity. The aims of this study were to investigate changes in maximal molar bite force during functional appliance treatment and to assess the influence of pre-treatment maximal molar bite force on treatment outcomes with functional appliances used in Class II malocclusion children. Twenty-five children (17 males and 8 females), aged 9-13 years, with a Class II malocclusion and increased overjet were treated with functional appliances for 1-2 years. Dental casts, lateral cephalograms, maximal molar bite force, and finger force measurements were performed before (T1) and after (T2) treatment. These same measurements were also performed 1-2 years before treatment (T0); the intermediate period before starting treatment served as the control. Multiple regression analyses were used to determine possible correlations between initial maximal molar bite force and dental or cephalometric changes during treatment. Maximal molar bite force, which increased pre-treatment (T0-T1), decreased during functional appliance treatment (T1-T2). Children with a weaker T1 maximal molar bite force showed a larger overjet reduction, greater improvement in molar relationship, greater reduction in ANB angle, and greater augmentation in SNB angle from T1 to T2. Treatment of children with Class II malocclusions with functional appliances seems to lead to more favourable treatment outcomes in those with a weaker maximal molar bite force. This was observed both as regards improvements in dental sagittal relationships, namely overjet and molar Class, as well as skeletal changes due to a decrease in ANB and an increase in SNB angles. © The Author 2011. Published by Oxford University Press on behalf of the European Orthodontic Society. All rights reserved.
|
|
| 4. |
- Fontinha, C., et al.
(författare)
-
Craniofacial morphology and growth in young patients with congenital or childhood onset myotonic dystrophy
- 2018
-
Ingår i: European Journal of Orthodontics. - : Oxford University Press (OUP). - 0141-5387 .- 1460-2210. ; 40:5, s. 544-548
-
Tidskriftsartikel (refereegranskat)abstract
- Background/objectives: This study investigated the craniofacial morphology of young individuals with congenital or childhood onset myotonic dystrophy type 1 (DM 1) compared to healthy subjects. The study also followed growth changes in their facial morphology over a 5-year period. Materials/methods: Lateral cephalograms of the 26 subjects (young patients with DM1 from west and south Sweden) were taken at baseline and after a 5-year period. These radiographs were compared with normal standards based on healthy individuals from the Michigan Growth Study, according to their age and sex, using paired t-tests (P < 0.05). Results: On examination of initial radiographic measurements, patients with DM1 showed, in the sagittal plane, larger ANB and smaller SNPg angles. Analysis of the vertical plane showed the mandibular plane angle (ML-NSL) and the intermaxillary angle (ML-NL) to be larger. During the 5-year follow-up period, the intermaxillary angle (ML-NL) remained the same in the group with DM1 whereas this angle decreased in healthy individuals. Limitations: For ethical reasons, historical cephalometric norms were used to compare the growth and the craniofacial morphology of patients with DM1. Conclusions/implications: Young patients with DM1 had already from the beginning a more retrognathic profile and hyperdivergent skeletal aberration with a steep mandibular plane and large intermaxillary angle when compared with healthy individuals. The intermaxillary angle did not decrease during the observation period, contrary to what was observed in healthy individuals.
|
|
| 5. |
- Mejersjö, Christina, et al.
(författare)
-
Temporomandibular dysfunction in adult patients with myotonic dystrophy (DM1)
- 2017
-
Ingår i: Journal of Oral Rehabilitation. - : Wiley. - 0305-182X. ; 44:10, s. 749-755
-
Tidskriftsartikel (refereegranskat)abstract
- Myotonic muscle dystrophy is a systemic disease with early engagement of the facial muscles. Our aim was to study dysfunction of the temporomandibular system in patients with 'classic' dystrophia myotonica (DM1) and compare it with TMD patients and healthy controls. The study included 27 referred patients with DM1, 18 women and nine men, aged 30-62 years, and two matched control groups: patients with temporomandibular disorders symptoms (TMD) and healthy controls, both groups were consecutive patients. The patients answered questions regarding facial pain, jaw function and dysfunction. A clinical examination of the temporomandibular system including the occlusion was performed, and the maximum bite force and finger forces were measured. Among the DM1 patients, 33% reported difficulty biting off, and 22% had difficulty chewing, avoiding foods like meat and raw vegetables, and 37% of the DM1 patients scored their pain and discomfort as moderate to fairly severe. Their main complaints were TMJ clicking and locking, difficulty opening wide and tiredness. They had more clinical signs of dysfunction compared with the controls (P < 0.001), but no statistically significant difference to the TMD patients. The maximum bite force in DM1 patients was impaired compared to both the TMD patients and the controls (P < 0.001). Significantly more occlusal interferences were found in DM1 patients and were associated with chewing difficulties (P < 0.001). In conclusion, patients suffering from DM1 had an increased prevalence of TMD symptoms, reported impaired chewing function and had a decreased maximum bite force.
|
|
| 6. |
- Schatz, J. P., et al.
(författare)
-
Large overjet as a risk factor of traumatic dental injuries: a prospective longitudinal study
- 2020
-
Ingår i: Progress in Orthodontics. - : Springer Science and Business Media LLC. - 2196-1042. ; 21:1
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose The aim of this longitudinal prospective study was to evaluate if schoolchildren with large overjet experience a greater risk of traumatic dental injuries (TDI) compared to children with normal or small overjet. Methods A sample of children aged 6-13 years was prospectively evaluated after 1 year: from the initial sample, data concerning trauma cases of 1413 children were collected to determine the number and types of injuries, the influence of overjet on the risk of TDI, and the relationships between trauma, age, and gender. Results The observed prevalence of trauma was higher for boys, with the largest frequency between the ages of 8 to 12 years: 67.9% of all injuries were hard tissue injuries and 32.1% subluxation and luxation injuries. Children with an overjet of 6 mm or more showed a statistically increased risk of getting trauma [RR = 3.37 with CI (1.81; 6.27)]. Conclusion In this prospective study, overjet stood out among variables as the most significant risk factor of TDI: an increased overjet of 6 mm or more had a major impact on the risk of trauma, which would speak in favor of early orthodontic correction of an increased overjet to reduce the prevalence of dental trauma
|
|
| 7. |
|
|
