Orthodontics
Mahamad Irfanulla Khan; Praveen Kumar Neela; Ajit Kumar Jaiswal; Nayeem unnisa; Abhik Purkayastha; Amita Coutinho; Nadeem Ahmed
Abstract
Background: Fixed functional appliances used in the treatment of Class II malocclusion have the advantage of requiring minimal patient compliance, and they can be used simultaneously with fixed orthodontic appliances. The purpose of this retrospective study was to evaluate the treatment effects of the ...
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Background: Fixed functional appliances used in the treatment of Class II malocclusion have the advantage of requiring minimal patient compliance, and they can be used simultaneously with fixed orthodontic appliances. The purpose of this retrospective study was to evaluate the treatment effects of the Forsus Fatigue Resistant Device (FFRD) in growing patients with Class II malocclusion. Methods: A total of 50 pre-treatment (T1) and post-treatment (T2) Lateral Cephalometric Radiographs (LCRs) of 25 patients treated with Forsus fatigue resistant device (mean age = 12 ± 0.54years) for the correction of skeletal class II malocclusion were compared with the 25 untreated class II control patients (mean age 12 ± 0.38 years) who did not undergo any treatment during this period. The skeletal, dental, and soft tissue changes were evaluated using cephalometric measurements, and the treatment changes were analyzed by paired t-test. Results: The LCRs findings showed that the FFRD produced more dentoalveolar changes with less skeletal changes. The dentoalveolar changes in the FFRD group include significant reduction of overjet & overbite (p<0.001), retroclination of maxillary incisors (p<0.001), proclination and intrusion of the mandibular incisors (p<0.001) and mesialization of mandibular first molars (p<0.001). A significant improvement in the skeletal, dentoalveolar and soft tissue structures of the face was achieved in the FFRD group compared with the control group.Conclusion: The FFRD is effective in the treatment of Class II malocclusion. The Class II correction was achieved by a combination of skeletal and dentoalveolar effects, and wherein dentoalveolar changes were more predominant compared to the skeletal changes.
Orthodontics
Mahdjoube Goldani Moghadam; hanieh kazemi; Mahdi Mohammadi
Abstract
Background: There is a continuous debate on the issue of comparison between extraction and non-extraction treatment results in terms of subsequent soft tissue changes for Class II division 1 patients. So far, however, far too little attention has been paid to photographic evaluation of treatment results.Aims: ...
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Background: There is a continuous debate on the issue of comparison between extraction and non-extraction treatment results in terms of subsequent soft tissue changes for Class II division 1 patients. So far, however, far too little attention has been paid to photographic evaluation of treatment results.Aims: The aim of this was to assess the impact of extraction and non-extraction treatment of Class II division 1malocclusion on soft tissue profile by means of pre- and post- treatment photographs.Materials and methods: The pre- and post- treatment profile photographs of 41 borderline Class II division 1malocclusion patients (ANB ≤5 degrees, and overjet ≤ 5 mm) were evaluated. The photographs were digitized into the computer and 19 angular measurements were evaluated. Paired t-tests and Independent-sample t-tests were performed to compare the pre- and post- treatment values between the extraction and non- extraction groups. The level of significance was set to be P < .05.Results: Significant differences between pre- and post- treatment values in extraction group existed for Z angle and N‑Sn‑Pog. In non- extraction group significant differences observed in N‑Pn‑Pog, G‑Sn‑Pog, N‑Sn‑Pog and N‑Sn‑B.When comparing the extraction and non-extraction groups before and after treatment the results showed that the only significant difference was in PFH/AFH proportion.Conclusions: The results of this study for both extraction and non- extraction group were straightening and improvement of soft tissue profile without significant impact on lips or nasolabial angle.
Gregory S Antonarakis; Stavros Kiliaridis
Abstract
Large variation exists amongst patients with regards to treatment outcomes following functional appliance treatment in growing children. Various factors have been assessed with regard to this variation, but evidence is scarce. Recent studies suggest that the initial condition of the masticatory muscles ...
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Large variation exists amongst patients with regards to treatment outcomes following functional appliance treatment in growing children. Various factors have been assessed with regard to this variation, but evidence is scarce. Recent studies suggest that the initial condition of the masticatory muscles may be one of the factors that influences treatment and post-treatment functional appliance outcomes. Children with weaker masticatory muscles show greater dentoalveolar change, as witnessed by incisor compensation and molar movement. Following functional appliance treatment, children who show greater dentoalveolar treatment change may also be those with a more likely post-treatment sagittal relapse. The gonial angle may also be a variable determining treatment outcomes with functional appliances in that more incisor compensation and a greater likelihood for relapse is evident in those with a more open gonial angle. The gonial process is the site of muscle attachment for the masseter and median pterygoid muscles, and the thickness and force of these muscles can have an effect on the process and its contribution to mandibular morphology. By extrapolation, cephalometric analysis of the gonial angle can perhaps provide insight into the amount of incisor proclination expected to be observed during and after functional appliance treatment.
