scholarly journals An Innovative Lingual Retainer Wire Stabilizer

2020 ◽  
Vol 54 (4) ◽  
pp. 382-383
Author(s):  
Tivanani Venkata Durga Mahendra ◽  
Vyshnavi Mulakala
Keyword(s):  
Orthodontic Treatment ◽  
Soft Tissues ◽  
Critical Step ◽  
Stable Position ◽  
Custom Made ◽  
Iatrogenic Damage ◽  
Lingual Retainer

One of the means of maintaining the incisor alignment after orthodontic treatment is by fixed lingual retainer. Over the decade’s various techniques have been advocated for bonding a lingual retainer wire. The most critical step to the orthodontist is stabilization of retainer wire in its stable position to prevent relapse. The purpose of this study is to introduce a custom-made device which is easy to fabricate and stabilizes the retainer wire to the contours of the palatal surface of the teeth without causing any iatrogenic damage to the adjacent soft tissues while bonding.

scholarly journals Useful design of custom-made mouthguard for athletes undergoing orthodontic treatment with brackets and wires

2021 ◽  
Author(s):  
Ruman Uddin Chowdhury ◽  
Hiroshi Churei ◽  
Gen Tanabe ◽  
Yuriko Yoshida ◽  
Kairi Hayashi ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Custom Made

scholarly journals A Protocol for the Use of a Combined Microvascular Free Flap with Custom-Made 3D-Printed Total Temporomandibular Joint (TMJ) Prosthesis for Mandible Reconstruction in Children

2021 ◽  
Vol 11 (5) ◽  
pp. 2176
Author(s):  
Krzysztof Dowgierd ◽  
Rafal Pokrowiecki ◽  
Maciej Borowiec ◽  
Marcin Kozakiewicz ◽  
Dominika Smyczek ◽  
...  
Keyword(s):  
Temporomandibular Joint ◽  
Soft Tissues ◽  
Total Joint Replacement ◽  
Speech Development ◽  
Functional Requirements ◽  
Immediate Reconstruction ◽  
Congenital Deformities ◽  
Custom Made ◽  
Masticatory System

Extended postoperative mandibular reconstructions due to orofacial disease involving the temporomandibular joint (TMJ) in immature patients remain a challenge as a result of ongoing growth, which is usually affected by the disease and treatment. Current reconstructive techniques based fully on alloplastic total joint replacement fail to meet fully the anatomical and functional requirements for the masticatory system and speech development. Fourteen children aged 12.6 ± 2.6 with tumors or congenital deformities affecting the mandible and TMJ were included in the study. Radical surgical treatment according to our own protocol was performed through microvascular anastomotic flap reconstruction of the soft tissues and bones, together with total TMJ custom replacements. Follow-up lasted 2–6 years. During the follow-up, increases in the mandible body (13% growth) and ramus (12% growth) were observed, both of which were related (p < 0.001). This is the first report concerning the immediate reconstruction of the mandible with ramus and total TMJ in children and adolescents that combines a free vascularized graft and total individual prosthesis of the TMJ. The presented technique enabled optimal function of the TMJ, growth of the mandible, and further rehabilitation of the patients. The technique was demonstrated to be safe, reliable, and provide good functional and cosmetic outcomes.

The Bonded Mandibular Lingual Retainer

1986 ◽  
Vol 13 (3) ◽  
pp. 159-163 ◽  
Author(s):  
Shabbir T. Adenwalla ◽  
Fereidoon Attarzadeh
Keyword(s):  
Orthodontic Treatment ◽  
Anterior Teeth ◽  
Lingual Retainer ◽  
Bonded Retainers

The lower fixed retainer from cuspid to cuspid has been one of the commonly used methods of retention at the end of the orthodontic treatment. Orthodontists mostly use the lingual wire soldered to cuspid bands for the fixed lower retainer. With the advent of the new effective bonding materials many orthodontists prefer to use cuspid-to-cuspid/biscuspid-to-biscuspid bonded retainers to obtain optimal retention of lower anterior teeth both functionally and aesthetically. After experimenting with a variety of previous methods, such as the use of rubber bands, elastic threads, cotton pliers, ligature wires and silastic trays for the accurate placement and immobilization of a lower lingual retainer during the bonding, we have found that the use of two 1 to 1½ inch pieces of 0·016 inch wires tack welded to lingual wire gives the best results. It is more accurate, simple, inexpensive and designed to save the orthodontist chair time.

scholarly journals Custom-Made 3D-Printed Implants as Novel Approach to Reconstructive Surgery after Oncologic Resection in Pediatric Patients

2021 ◽  
Vol 10 (5) ◽  
pp. 1056
Author(s):  
Giovanni Beltrami ◽  
Gabriele Ristori ◽  
Anna Maria Nucci ◽  
Alberto Galeotti ◽  
Angela Tamburini ◽  
...  
Keyword(s):  
Pediatric Patients ◽  
Soft Tissues ◽  
Lower Limbs ◽  
Host Bone ◽  
Limb Salvage Surgery ◽  
Musculoskeletal Tumor ◽  
Musculoskeletal Tumor Society ◽  
Custom Made ◽  
3D Printed

Recently, custom-made 3D-printed prostheses have been introduced for limb salvage surgery in adult patients, but their use has not been described in pediatric patients. A series of 11 pediatric patients (mean age 10.8 years; range 2–13) with skeletal tumors treated with custom-made implants for the reconstruction of bony defects is described. Patients were followed up every 3 months. Functional results were evaluated by the Musculoskeletal Tumor Society Score (MSTS) for upper and lower limbs. The mean follow-up was 25.7 months (range 14–44). Three patients died after a mean of 19.3 months postoperatively—two because of disease progression and the other from a previous malignancy. Three patients experienced complications related to soft tissues. One patient required device removal, debridement, and antibiotic pearls for postoperative infection. Partial osseointegration between grafts and host bone was observed within a mean of 4 months. At the final follow-up, mean MSTS score was 75%. 3D prostheses may yield biological advantages due to possible integration with the host bone and also through the use of vascularized flaps. Further research is warranted.

Measurement of cortical plate volume based on CBCT of frontal teeth in studies with retrusion and normality

2021 ◽  
pp. 17-21
Author(s):  
N. G. Meskhiya ◽  
I. S. Kopetskiy ◽  
I. A. Nikolskaya ◽  
D. A. Eremin ◽  
O. N. Kovaleva
Keyword(s):  
Orthodontic Treatment ◽  
Soft Tissues ◽  
Three Dimensions ◽  
Cone Beam ◽  
Cortical Plate ◽  
Imaging Method ◽  
New Approach ◽  
Accuracy Of Measurements ◽  
Bone Structures

Cone Beam Computed Tomography (CBCT) is the preferred imaging method for a comprehensive orthodontic examination. Thanks to the development of this technique, clinicians today can make most accurate measurements without fear of errors associated with projection distortion or localization of landmarks on radiographs. The quality of CBCT images gives to orthodontists the ability to analyze bone structures, teeth (even impacted teeth), and soft tissue in three dimensions. The accuracy of measurements of hard and soft tissues from CBCT images determines the accuracy of diagnosis and treatment planning. A fundamentally new approach has been proposed, which makes it possible to thoroughly study the bone tissue surrounding the tooth at the stages of planning orthodontic treatment. Аnalysis of radiation studies of patients with dentoalveolar anomalies was carried out to select the optimal treatment tactics and to control its effectiveness.

Design and Validation of a Compatible 3-Degrees of Freedom Shoulder Exoskeleton With an Adaptive Center of Rotation

2014 ◽  
Vol 136 (7) ◽  
Author(s):  
Hua Yan ◽  
Canjun Yang ◽  
Yansong Zhang ◽  
Yiqi Wang
Keyword(s):  
Soft Tissues ◽  
Dimensional Space ◽  
Interaction Force ◽  
Shoulder Abduction ◽  
Upper Arm ◽  
Human Machine Interaction ◽  
Center Of Rotation ◽  
Custom Made ◽  
Flexion Extension ◽  
Machine Interaction

This paper outlines an experimentally based design method for a compatible 3-DOF shoulder exoskeleton with an adaptive center of rotation (CoR) by matching the mechanical CoR with the anatomical CoR to reduce human–machine interaction forces and improve comfort during dynamic humeral motion. The spatial–temporal description for anatomical CoR motion is obtained via a specific experimental task conducted on six healthy subjects. The task is comprised of a static section and a dynamic section, both of which are recorded with an infrared motion capture system using body-attached markers. To reduce the influence of human soft tissues, a custom-made four-marker group block was placed on the upper arm instead of using discrete markers. In the static section, the position of anatomical CoR is kept stationary and calculated using a well-known functional method. Based on the static results, the dynamic section determines the statistical relationship between the dynamic CoR position and the humeral orientation using an optimization method when subjects move their upper arm freely in the sagittal and coronal planes. Based on the resolved anatomical CoR motion, a new mechanical CoR model derived from a traditional ball-and-socket joint is applied to match the experimental results as closely as possible. In this mechanical model, the CoR motion in three-dimensional space is adjusted by translating two of the three intersecting joint axes, including the shoulder abduction/adduction and flexion/extension. A set of optimal translation parameters is obtained through proper matching criterion for the two CoRs. Based on the translation parameters, a compatible shoulder exoskeleton was manufactured and compared with a traditional shoulder exoskeleton with a fixed CoR. An experimental test was conducted to validate the CoR motion adaptation ability by measuring the human–machine interaction force during passive shoulder joint motion. The results provide a promising direction for future anthropomorphic shoulder exoskeleton design.

A Comparative Study of the Length Patterns of Anterior Cruciate Ligament Reconstructions in the Dog and Man

2000 ◽  
Vol 13 (02) ◽  
pp. 73-77 ◽  
Author(s):  
J. T. Andrish ◽  
M. L. Olmstead ◽  
Helen Kambic ◽  
A. Shah ◽  
M. P. Palmisano
Keyword(s):  
Anterior Cruciate Ligament ◽  
Soft Tissues ◽  
Cruciate Ligament ◽  
Statistical Significance ◽  
Full Extension ◽  
Cranial Cruciate Ligament ◽  
Custom Made ◽  
Fresh Frozen ◽  
Anterior Cruciate ◽  
Over The Top

SummaryTo measure the change of length patterns of nine different simulated anterior cruciate ligament (ACL) reconstructions in the canine and human knee.Six fresh-frozen canine cadaver knees and six fresh-frozen human cadaver knees were used in this study. All of the soft tissues were removed from each cadaver knee, leaving the menisci, collateral ligaments and cruciate ligaments intact. After fixation of the femur to a custom-made frame, the ACL was excised. Three tunnels were made each at the ACL origin and insertion, making possible nine reconstruction combinations. A modified intra-articular technique was used to measure change of length, in mm, of each ACL reconstruction through a range of motion of 0 degrees (full extension) to 135 degrees of flexion. A rankorder list of reconstruction combinations was determined. The most isometric combination was determined for the canine and human knees, and trends in length patterns were also evaluated in both species relative to femoral and tibial position. Statistical significance was determined by ANOVA.A combination joining a point caudal to the ACL origin (over-the-top) and anterior on the tibial insertion was found to be the most isometric combination in both the canine and human. The trends in change of length patterns across all reconstruction combinations were similar in the dog and man. Isometry was improved as the reconstruction was placed further posterior on the femur and anterior on the tibia. Conclusions: The canine knee is an appropriate animal model for the study of isometry of the human ACL and its reconstructions.The length patterns of nine simulated Anterior Cruciate Ligament (ACL) reconstructions were determined in the dog and man. In both species, the most isometric reconstruction was one joining points corresponding to a position at the posterior edge of the intercondylar roof of the femur (over-thetop) with a position anterior on the ACL insertion. For the sake of clarity the term anterior cruciate ligament has been used, throughout, for both species, instead of the cranial cruciate ligament (CCL) in the dog. Also knee has been used in place of stifle for the dog.

scholarly journals The Effectiveness of Dental Protection and the Material Arrangement in Custom-Made Mouthguards

2021 ◽  
Vol 11 (20) ◽  
pp. 9363
Author(s):  
Ana Messias ◽  
Inês J. Gomes ◽  
Paulo N. B. Reis ◽  
Ana M. Amaro ◽  
Maria A. Neto
Keyword(s):  
Soft Tissue ◽  
Soft Tissues ◽  
Mechanical Response ◽  
Scientific Information ◽  
Soft Tissue Injuries ◽  
Ethylene Vinyl Acetate ◽  
Outer Shell ◽  
The Core ◽  
Anterior Teeth ◽  
Custom Made

Experimental research studies have shown that wearing a mouthguard (MG) is an effective way to prevent tooth or maxillofacial trauma. However, there is a lack of scientific information regarding how the material arrangement within the mouthguard can modify its mechanical response during an impact. Hence, this study aimed to evaluate the influence of material arrangement within custom-made mouthguards on stress transmitted to anterior teeth, bone, and soft tissue after impact. Four 3D finite element models of a human maxilla were reconstructed based on the CBCT of a young patient and analyzed according to the presence or absence of a mouthguard and the type of material arrangement within those with a mouthguard: model NMG with no mouthguard; model CMG representing the conventional arrangement with a single 4 mm-thick ethylene-vinyl acetate (EVA) foil; model FMG presenting layer arrangement with two 1 mm-thick foils of EVA in the outer shell and one 2 mm-thick foil of EVA foam in the core; model HMG presenting a 1 mm-thick compact inner and outer shell of EVA and a 2 mm wide air-filled zone in the core. Linear quasi-static analysis and frontal load were used to simulate an impact with an energy of 4.4 J. Isotropic linear elastic properties were assumed for the bone and teeth but not for the mouthguard protection and oral soft tissues. The results were evaluated and compared in terms of displacement, stretches, and stresses. All the mouthguards analyzed reduced the risk of injury to teeth and bone, reducing the displacement and stress of these structures. However, the implementation of a honeycomb structured layer allowed more significant displacement and deformation of the mouthguard's external layer, thus promoting higher protection of the anatomic structures, namely the root dentin and the bone tissue. Nevertheless, the results also indicate that improving the mouthguard flexibility might increase the soft tissue injuries.

scholarly journals The influencing factors of citizen of Bandung preferences towards dental quack on constructing custom-made orthodontic appliances

2016 ◽  
Vol 28 (3) ◽  
Author(s):  
Akhyar Dyni Zakyah ◽  
Shekarwangi Rosabella ◽  
Nuzulul Hafizoh ◽  
Avi Laviana ◽  
Asty Samiaty Setiawan
Keyword(s):  
Influencing Factors ◽  
Low Income ◽  
Orthodontic Treatment ◽  
Influencing Factor ◽  
Lower Price ◽  
Orthodontic Appliances ◽  
Orthodontic Appliance ◽  
Cross Sectional ◽  
Study Results ◽  
Custom Made

Introduction: Braces often used in the treatment of malocclusion. However, in recent years malocclusion no longer becomes the reason for orthodontic treatment. Many people use it merely for a lifestyle purpose, and most of them got it from the dental quack. This study was aimed to understand the influencing factors of the citizen of Bandung preferences towards dental quack on constructing custom-made orthodontic appliances. Methods: This study was a cross-sectional study with purposive sampling technique consisted of 30 samples. The inclusion criteria were subject wearing dental quack custom-made orthodontic appliance; citizen of Bandung; and willing to participate in the study. Exclusion criteria were subject refused to participate in the study. Results: The study showed that most of the subject (73%) were using the treatment for the teeth alignment, and only a few were using for the lifestyle purpose only. From all subjects wearing orthodontic appliance, 63% of them were chosen dental quack custom-made orthodontic appliance due to the lower price, and 37% of the rest due to peer’s suggestion who had it before. The combination of the low income with the needs of orthodontic treatment and inadequate information regarding orthodontic appliance such as dental braces affected the subjects preferences towards the dental quack custom-made orthodontic appliance. Overall, the socioeconomic environment is the most influencing factor of preference. Conclusion: A lower price was the most influencing factor of high preferences for the dental quack custom-made orthodontic appliance.

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