scholarly journals Thermoformed Retainer: An Effective Option for Long-Term Stability

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
A. Giancotti ◽  
P. Mozzicato ◽  
G. Mampieri
Keyword(s):  
Clinical Case ◽  
Treatment Plan ◽  
Class Ii ◽  
Aesthetic Result ◽  
Term Stability ◽  
Long Term Stability ◽  
Anterior Teeth ◽  
Technical Features

Introduction. The concept of orthodontic retention is moving toward the idea that teeth will move unless retained indefinitely. However, permanent retention implies permanent supervision, and that is where reality clashes with stability. The cornerstone of Essix permanent retention is the complete delegation of responsibility to the patient. Essix retainers have nothing to adjust, but maximum collaboration of the patient is essential to achieve long-term stability. The purpose of this paper is to show the effectiveness of the thermoplastic appliance as a retainer, using a clinical case with a 10-year follow-up. Case Report. A 33-year-old male patient presented with a class II malocclusion division 2 and normal skeletal pattern. According to the patient’s desire, a treatment plan was proposed to obtain the aesthetic result of the smile, maintaining the molar and canine class II relationship. The orthodontic therapy was performed by using the Invisalign System. In this case, it was possible to appreciate a posterior occlusal stability after 10 years. Conclusion. Currently, among orthodontists, the use of removable plastic devices is gaining popularity thanks to their capability to encapsulate and retain both posterior and anterior teeth. In this article, the technical features of thermoformed retainers will be described and one clinical case with a 10-year follow-up will be presented to emphasize the effectiveness of these retainers.

Class II treatment in early mixed dentition with the eruption guidance appliance: effects and long-term stability

2019 ◽  
Vol 42 (2) ◽  
pp. 151-156 ◽  
Author(s):  
Katri Keski-Nisula ◽  
Leo Keski-Nisula ◽  
Juha Varrela
Keyword(s):  
Treatment Group ◽  
Class Ii ◽  
Post Treatment ◽  
Mixed Dentition ◽  
Term Stability ◽  
Long Term Stability ◽  
Class Ii Treatment ◽  
Significant Correction ◽  
The Mean

Summary Objectives Our aim was to analyse dentoskeletal effects and long-term stability of Class II treatment carried out with an eruption guidance appliance (EGA) in early mixed dentition. Materials and methods Sixty-five Class II patients (38 females and 27 males), treated with an EGA in early mixed dentition, were compared with 58 children (26 females and 32 males) with untreated Class II malocclusion. The mean age in the treatment group at the start (T1) and end of treatment (T2) was 5.4 years (±0.4) and 8.5 years (±0.9), respectively, and at the final examination in the early permanent dentition (T3) 16.7 years (±0.4). In the control group, the mean age at T1 and T2 were 5.1 years (±0.5) and 8.4 years (±0.5), respectively. The independent and dependent sample t-tests, Chi-square test, and Fisher’s test were used in the statistical evaluation. Results In the treatment group, the frequency of Class II decreased from 100 to 14% during the treatment (T1–T2) and a significant correction took place in all occlusal variables. At T2, the treatment and control groups showed statistically significant differences (P < 0.05) in all occlusal variables. In the treated children, mandibular length increased 5 mm more (P < 0.001) from T1 to T2 compared to the control children, and the ANB angle became significantly smaller (P = 0.006). During the post-treatment period (T2–T3), the frequency of Class II in the treatment group decreased from 14 to 2% (P < 0.05), overbite increased from 2.2 to 3.1 mm (P < 0.05), and lower crowding increased from 2to 14% (P < 0.05). Post-treatment changes in overjet and upper crowding were not statistically significant. At T3, the mean values of the SNA, SNB, and ANB angles were 83.0° (SD 3.9°), 81.3° (SD 3.8°), and 2.4° (SD 1.5°), respectively. Conclusions A clinically significant correction of the molar relationship, overjet, overbite, incisor alignment, and growth enhancement of the mandible were observed after treatment in early mixed dentition. The treatment results remained largely stable in the early permanent dentition. However, an increase was observed in overbite and lower crowding. None of the children treated in early mixed dentition needed a second treatment phase.

scholarly journals Middle Ear Transducer: Long Term Stability of the Latest Generation T2

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Nils Kristian Prenzler ◽  
Eugen Kludt ◽  
Thomas Giere ◽  
Rolf Salcher ◽  
Thomas Lenarz ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Middle Ear ◽  
Observation Time ◽  
Term Stability ◽  
Long Term Stability ◽  
Average Observation ◽  
Technical Failures

Objectives/Hypothesis. Comparing long term stability of the Middle Ear Transducers (MET) of the 1st generation T1 (Otologics LLC) with the current generation T2 (Cochlear Ltd.) in all our clinical cases with standard incus coupling. Study Design. Retrospective chart review. Methods. 52 ears implanted with a MET device between 2008 and 2016 were analyzed retrospectively. All patients suffered from sensorineural hearing loss and the actuator was coupled to the body of the incus (standard coupling). 23 ears were implanted with the transducer T1 (Otologics LLC) between 2008 and 2011 and 29 ears were implanted with the current transducer T2 since 2011 (Otologics LLC/Cochlear Ltd.). Latest available in situ and bone conduction (BC) thresholds were exploited for a follow-up period of up to 7 years after first fitting. Long term stability of coupling and actuator performance was evaluated by tracking differences between in situ and BC thresholds. Results. In the T1 group, 9 out of 23 implants were still used by the patients at their last follow-up visit (average observation time 3.7 yrs.; min 1.0 yrs., max 7.4 yrs.). In 9 patients a technical failure identified by a decrease of in situ threshold of more than 15 dB compared to BC thresholds [Δ (in situ – BC)] lead to non-usage of the implant and 7 explantations. Five other explantations occurred due to medical reasons such as BC threshold decrease, infection, or insufficient speech intelligibility with the device. In the T2 group, 23 out of 29 implants were still used at the most current follow-up visit (average observation time 3.3 yrs.; min 1.0 yrs., max 4.8 yrs.). No technical failures were observed up to more than 4 years after implantation. Five T2 patients discontinued using the device due to insufficient benefit; two of these patients were explanted. One patient had to be explanted before the activation of the device due to disorders of wound healing. Nevertheless, a small but significant decrease of hearing loss corrected coupling efficiency [Δ (in situ – BC)] was seen in the T2 group. Conclusions. In contrast to the T1 transducers of the earlier generation of MET systems where technical failures occurred frequently, no technical failures were detected after 29 implantations with the current T2 transducers. However, a small but significant decline of transmission efficiency was observable even in the T2 implanted group.

Long-term stability of Class II treatment with the Jasper jumper appliance

2017 ◽  
Vol 152 (5) ◽  
pp. 663-671 ◽  
Author(s):  
Camilla Fiedler Foncatti ◽  
José Fernando Castanha Henriques ◽  
Guilherme Janson ◽  
Waleska Caldas ◽  
Daniela Gamba Garib
Keyword(s):  
Class Ii ◽  
Term Stability ◽  
Long Term Stability ◽  
Class Ii Treatment

Long-term stability: Postretention changes of the mandibular anterior teeth

2013 ◽  
Vol 144 (3) ◽  
pp. 420-429 ◽  
Author(s):  
Scott A. Myser ◽  
Phillip M. Campbell ◽  
Jim Boley ◽  
Peter H. Buschang
Keyword(s):  
Term Stability ◽  
Long Term Stability ◽  
Anterior Teeth

scholarly journals Combining Techniques to Treat Isolated Deep Recession-Type Defects: A Case Report with Long-Term Stability

2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
João Carnio ◽  
Anna Tereza Carnio
Keyword(s):  
Case Report ◽  
Root Coverage ◽  
Case Presentation ◽  
Term Stability ◽  
Long Term Stability ◽  
Dental Procedures ◽  
Donor Area ◽  
Deep Recession

Introduction. The purpose of this case report was to show the clinical long-term stability of a successful two-step root coverage procedure. A combination of two single techniques was used to treat an isolated deep-wide defect. Case Presentation. A 28-year-old female patient was referred in order to treat a single recession defect at #22. Due to her fear of dental procedures and a poor economic situation, the team developed an alternative solution. They used a modified apically repositioned flap (MARF) to increase the donor area and then a laterally positioned flap (LPF) to treat the root defect. Clinical evaluation at the three-year follow-up revealed complete resolution of the defect, a gain in clinical attachment, excellent esthetic results, and minor morbidity to the patient. Conclusion. The combination of the MARF and the LPF procedures was able to successfully treat a single deep recession defect with some advantages over traditional techniques such as simplicity, ideal color match of tissues, and the absence of palatal donor tissue.

Characteristics of mandibular advancement surgery dependent on lower facial height differences in study of skeletal Class II patients with long-term stability

2007 ◽  
Vol 66 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Kazunori Fukui ◽  
Raymond M. Sugiyama ◽  
Ronald M. Kaminishi ◽  
Yoshiaki Matsuyama ◽  
Eiko Kuroda ◽  
...  
Keyword(s):  
Class Ii ◽  
Mandibular Advancement ◽  
Skeletal Class ◽  
Term Stability ◽  
Long Term Stability ◽  
Facial Height ◽  
Skeletal Class Ii

Treatment of severe mandibular deficiency following TMJ ankyloses by distraction osteogenesis and orthodontic treatment with microimplants

2021 ◽  
pp. 146531252110598
Author(s):  
Ho-Jin Kim ◽  
Hyo-Sang Park
Keyword(s):  
Distraction Osteogenesis ◽  
Term Treatment ◽  
Long Term Stability ◽  
Anterior Teeth ◽  
Mandibular Distraction Osteogenesis ◽  
Long Term Treatment ◽  
History Of ◽  
Mandibular Retrognathia

Severe mandibular deficiency caused by temporomandibular joint (TMJ) ankyloses produces functional and aesthetic problems that require complicated long-term treatment. In this case report, we describe the benefits of using microimplant mechanics for controlling the direction of distraction during distraction osteogenesis and for performing the movement of teeth. We also present its remarkable results and long-term stability. A 20-year-old girl presented with a convex profile due to severe mandibular retrognathia after a history of several TMJ surgeries for bilateral TMJ ankyloses. Mandibular distraction osteogenesis (MDO) was performed, and elastics were placed between the microimplants to control the direction of distraction. Subsequently, after retraction of the maxillary anterior teeth and distalisation of the whole mandibular dentition, the facial profile was markedly improved, and good interdigitation was obtained. The six-year follow-up retention and overall stability were satisfactory with good interdigitation and jaw function.

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