Free-end Space Maintainers: Design, Utilization and Advantages

2007 ◽  
Vol 31 (1) ◽  
pp. 5-8 ◽  
Author(s):  
Elena Barbería ◽  
Tania Lucavechi ◽  
Dora Cárdenas ◽  
Myriam Maroto
Keyword(s):  
Orthodontic Treatment ◽  
Primary Molar ◽  
Restorative Treatment ◽  
Permanent Molar ◽  
Pediatric Dentist ◽  
Space Maintainer ◽  
Space Maintenance ◽  
End Space ◽  
Determining Factor ◽  
Selection Of

Primary molars are a determining factor in the development of occlusion. Given their importance, when restorative treatment is not feasible and a primary molar must be extracted, the practitioner should keep in mind the risk of losing space, and the consequent malocclusion. Preservation of the space can eliminate or reduce the need for prolonged orthodontic treatment. For that reason, there are various kinds of space maintainers and the pediatric dentist must decide which one to utilize, on the basis of general and local factors related to the child. In the selection of a treatment option for space maintenance, the greatest complications occur when the first permanent molar has not yet erupted. A large variety of appliances have been devised to deal with this situation. This article proposes the use of a removable space maintainer that is open on one end and can be employed to guide the first permanent molar, maintaining the integrity of the mucous membrane and serving as a prosthetic appliance, preventing the complications and contraindications often caused by sub-gingival maintainers.

scholarly journals Functional Band and Loop Space Maintainers in Children

2019 ◽  
Vol 2019 ◽  
pp. 1-4
Author(s):  
V. Vinothini ◽  
A. Sanguida ◽  
A. Selvabalaji ◽  
G. S. Prathima ◽  
M. Kavitha
Keyword(s):  
Clinical Application ◽  
Loop Space ◽  
Single Tooth ◽  
Space Maintainer ◽  
Space Maintenance ◽  
Band And Loop

Premature loss of teeth in children leads to space loss and affects arch integrity. The band and loop space maintainer is used in majority of patients requiring single tooth space maintenance in both primary and mixed dentitions. It preserves the proximal dimensions, but it is nonfunctional. This paper describes a method to modify the conventional band and loop space maintainer into a functional one and reports its clinical application and follow-up in five children.

scholarly journals Comparison of two caries prevention programs among Thai kindergarten: a randomized controlled trial

2020 ◽  
Author(s):  
Pagaporn Pantuwadee Pisarnturakit ◽  
Palinee Detsomboonrat
Keyword(s):  
High Risk ◽  
Controlled Trial ◽  
Low Risk ◽  
Kindergarten Children ◽  
Primary Molar ◽  
Permanent Molar ◽  
Carious Lesions ◽  
Caries Increment ◽  
Risk Approach ◽  
Clinical Trials Registry

Abstract Background: Intensified preventive regimen based on a ‘high-risk’ approach has been proposed instead the routine prevention that is generally given to the whole population. The effectiveness of these regimens may still be an issue. Therefore, the aim of this study was to compare two preventive programs carried out in a Public School for kindergarten children. Methods: The data from clinical examinations were used to assess the caries risk for 121 children. Children with at least 2 carious lesions were considered as high risk for dental caries development. These children were randomized into two groups. Half (High risk basic-HRB group) were provided the basic prevention regimen (oral-hygiene instruction and hands-on brushing practice for teachers and caregivers, daytime tooth brushing supervised by teachers at least once a week, newly erupted first permanent molar sealant, provision of toothbrush, fluoride-containing dentifrice, and a guidebook), which was also given to low-risk children (Low risk basic-LRB group). The other half (High risk intensive-HRI group) were additionally given an intensified preventive regimen (F-varnish application, primary molar sealant, and silver diamine fluoride (SDF) application on carious lesions). Clinical examinations were performed semiannually to determine the dmfs caries increment of the three groups. Results: The 89 children completed the 24-month examination were 3- to 5-year-old with 19, 35, and 35 children in the LRB, HRB, and HRI group, respectively. The new caries development at 24 months of the HRB group (75%) was higher than that of the HRI group (65.7%) and the LRB group (21.1%). One-way analysis of variance (ANOVA) indicated no significant differences of caries increment between the HRB and HRI groups at the end of our study ( p =0.709). Conclusions: The negligible difference in caries increment between the HRI and HRB groups implies that intensified prevention produced minimal additional benefit. Offering all children only basic prevention could have obtained virtually the same preventive effect with substantially less effort and lower cost. Trial registration: Thai Clinical Trials Registry (TCTR), TCTR20180124001. Registered 24 January 2018 - Retrospectively registered, https://www.clinicaltrials.in.th/TCTR20180124001.

scholarly journals High Intra-Abdominal Pressure Secondary to Obesity as a Determining Factor for Ventriculoperitoneal Shunt Malfunction

2018 ◽  
Vol 37 (01) ◽  
pp. 50-53
Author(s):  
Barbara Morais ◽  
Vitor Yamaki ◽  
Daniel Cardeal ◽  
Fernanda Andrade ◽  
Wellingson Paiva ◽  
...  
Keyword(s):  
Ventriculoperitoneal Shunt ◽  
Abdominal Ultrasound ◽  
Important Variable ◽  
Abdominal Pressure ◽  
Brain Tomography ◽  
Valve Malfunction ◽  
Determining Factor ◽  
Valve Pressure ◽  
Selection Of

AbstractThe ventriculoperitoneal shunt (VPS) is an established treatment for hydrocephalus. The functioning of the system requires a pressure difference between the cranial and abdominal cavities. The VPS can be particularly problematic in patients with increased intra-abdominal pressure (IAP). We report the case of a 16-year-old girl with VPS since she was 2 months old due to hydrocephalus secondary to myelomeningocele. The patient had been asymptomatic ever since, but she sought the emergency service with intermittent headache and vomiting. A non-enhanced brain tomography, a shunt trajectory X-ray and an abdominal ultrasound revealed no cause of system malfunction. In view of the persistent clinical picture, a revision of the shunt was performed, which revealed adequate intraoperative functioning. She returned with the same symptoms two weeks after surgery. The patient was obese (body mass index [BMI]: 48). We hypothesized intermittent valve malfunction due to increased intra-abdominal pressure. She underwent a ventriculoatrial shunt, without intercurrences. In the postoperative period, the patient presented transient tachycardia and was asymptomatic at the 6-month follow-up. Obesity should be considered an important variable for the inadequate functioning of the VPS due to increased IAP and catheter dystocia to the extraperitoneal cavity. Studies have already correlated the IAP with the BMI, which reaches between 8 mm Hg and 12 mm Hg in obese individuals. Therefore, the BMI can be considered during the selection of valve pressure in systems with non-adjustable valves to prevent insufficient drainage. The recognition of obesity as a cause of VPS malfunction is fundamental to avoid unnecessary surgeries and intermittent malfunction of the system.

Gender assignment strategies and L1 effects in the elicited production of mixed Spanish-Basque DPs

2021 ◽  
Author(s):  
Amaia Munarriz-Ibarrola ◽  
Maria-José Ezeizabarrena ◽  
Varun DC Arrazola ◽  
M. Carmen Parafita Couto
Keyword(s):  
Statistical Analyses ◽  
Gender Assignment ◽  
Determiner Phrases ◽  
Languages In Contact ◽  
Determining Factor ◽  
Selection Of

Abstract This paper investigates the strategies involved in gender assignment in Spanish-Basque mixed Determiner Phrases (DPs) with a gendered Spanish determiner (el M /la F) and a Basque ungendered noun. Previous studies on Spanish-Basque mixed DPs have revealed conflicting results regarding the determining factor affecting gender assignment, namely, phonological ending vs. analogical gender. We designed a forced-switch elicitation task in order to elicit mixed DPs with a Spanish determiner and a Basque noun (controlled for both phonological vs. analogical cues). Thirty highly proficient Spanish-Basque bilinguals with different profiles and socio­linguistic backgrounds participated in the study. Three cues were significant in the selection of the Spanish M/F determiner: the analogical gender and two phonological cues, the word ending and the root ending of the Basque noun. Further statistical analyses revealed participants’ L1 as a strong factor in the variability attested: bilinguals with Spanish as (one of) their L1(s) rely predominantly on the analogical criterion, whereas speakers with only Basque as L1 follow mainly the phonological criterion. Overall, this study provides an explanation for the previous conflicting results and highlights the fact that bilinguals may use different strategies depending on their bilingual profile and the morpho-phonological properties of the languages in contact.

SPONTANEOUS SELF-FERTILIZATION IN RELATION TO SEED PRODUCTION IN SWEET CLOVER (MELILOTUS)

1931 ◽  
Vol 5 (6) ◽  
pp. 660-664 ◽  
Author(s):  
L. E. Kirk ◽  
T. M. Stevenson
Keyword(s):  
Seed Production ◽  
Pollen Grains ◽  
Sweet Clover ◽  
Flower Structure ◽  
Melilotus Officinalis ◽  
Stigmatic Surface ◽  
Melilotus Alba ◽  
Self Fertilization ◽  
Determining Factor ◽  
Selection Of

The chief determining factor in spontaneous self-fertilization in white sweet clover (Melilotus alba) appears to be the distribution of pollen within the unopened flowers. This in turn depends on (1) length of stamens, (2) length of style, (3) amount of pollen, and (4) size of cavity within the upper part of the keel. When the flower structure and quantity of pollen is such as to insure the deposition of pollen grains on the stigma before the blossom is likely to be disturbed by insects, the plant will be normally self-fertilized. In the yellow flowered species of sweet clover (Melilotus officinalis) spontaneous self-fertilization is effectively prevented, except in certain varieties, by a characteristic of the stigma which makes it unreceptive. Scarification of the stigmatic surface appears to be necessary before fertilization can take place. Variation occurs also, as in M. alba, in the length of stamens and style, size of keel cavity, and the amount of pollen.There is a high correlation in M. alba between the percentage of flowers which are naturally self-pollinated and the percentage of flowers which produce pods when the plants are caged to exclude insects. Selection of plants which are normally self-fertilized can be made by examining the early flowers, thus obviating the necessity of bagging or caging plants which do not possess this character.A strain of M. alba which is normally self-fertilized was found to produce almost twice as much seed as another strain which is normally cross-pollinated under comparable conditions in the field.

Selection of restorative materials for the atraumatic restorative treatment (ART) approach: a review

2001 ◽  
Vol 21 (6) ◽  
pp. 216-221 ◽  
Author(s):  
Hak-Kong Yip ◽  
Roger J. Smales ◽  
Hien C. Ngo ◽  
Franklin R. Tay ◽  
Frederick C.S. Chu
Keyword(s):  
Atraumatic Restorative Treatment ◽  
Restorative Treatment ◽  
Restorative Materials ◽  
Selection Of

scholarly journals Combining different treatment philosophies and techniques to reach the desired treatment goal using butterfly system-customizing orthodontic treatment

2017 ◽  
Vol 5 (1) ◽  
pp. 68
Author(s):  
Dhaval Lekhadia
Keyword(s):  
Orthodontic Treatment ◽  
Treatment Time ◽  
Class Ii ◽  
Total Treatment Time ◽  
Initial Stage ◽  
Total Treatment ◽  
Tongue Thrust ◽  
Implant Anchorage ◽  
Extraction Treatment ◽  
Selection Of

This case report describes the orthodontic treatment of an 18-year-old male patient who presented with Straight profile; tongue thrust habit, proclined upper incisors, generalised spacing in upper and lower arches, Katz's class II premolar relation unilaterally, class II canine relation unilaterally with increased overjet and overbite. A butterfly system was used in the treatment combined with frictionless biomechanics in the initial stage of treatment followed by continuous arch mechanics in the later part of treatment. A tongued crib was used to stop the tongue thrust habit along with one elastic swallow exercise. Micro-implant anchorage was used unilaterally in the upper arch for retraction of the entire segment and correction of the unilateral class II canine and premolar relationship. To avoid a dished in profile, a non-extraction treatment was executed. Final corrections of distally tipped canines were achieved using conventional Begg’s  uprighting auxiliaries in the vertical slots of butterfly system in the finishing stage. The case was finished using bite settling elastics. Total treatment time was 1 year 2 months. Aesthetic and functional goals were achieved satisfactorily with proper selection of biomechanics.

Sign in / Sign up

Export Citation Format

Share Document