scholarly journals Biomex Quad Helix

2014 ◽  
Vol 4 (2) ◽  
pp. 56-57
Author(s):  
Shirish M. Bapat ◽  
Preeti Bhardwaj ◽  
Atul Singh ◽  
Nitesh Parasher ◽  
Amit Goel
Keyword(s):  
Stainless Steel ◽  
Steel Wire ◽  
Clinical Situation ◽  
Maxillary Expansion ◽  
Deep Bite ◽  
Anterior Extension ◽  
Permanent Molars ◽  
Quad Helix ◽  
First Permanent Molars ◽  
Maxillary Arch

Introduction: Anterior deep bite with narrow maxillary arch is a most common clinical situation orthodontists have to deal with in Class I as well as Class II malocclusions.Objective: To present a modification of the quad helix appliance which incorporates acrylic anterior bite plane for simultaneous bite opening with maxillary expansion (Biomex Quad helix). Appliance design: The appliance is made of 0.036 inch stainless steel wire. The anterior bridge of the quad helix is modified by extending it anteriorly. The wire is soldered to the stainless steel bands on the maxillary first permanent molars. Acrylic anterior bite plane is added to this anterior extension keeping the anterior helices exposed. It combines advantages of a quad helix with that of anterior bite plane. Hence it can be useful for simultaneous bite opening with maxillary expansion, deprogramming, and relieving TMJ symptoms by unlocking the occlusion.Conclusion: Biomex Quad Helix is a versatile appliance which is simple in design, easy to fabricate, comfortable for the patient, and economical for the operator and the patient.

Iatrogenic Root Resorption of Upper First Permanent Molars Associated with Orthodontic Treatment

1987 ◽  
Vol 14 (2) ◽  
pp. 109-113 ◽  
Author(s):  
F. J. Hill
Keyword(s):  
Orthodontic Treatment ◽  
Root Resorption ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion ◽  
Second Molar ◽  
Permanent Molars ◽  
First Permanent Molars

A case of severe resorption of the roots of upper first molars, associated with second molar impaction, is reported. The possible causes of this condition, which occurred as a complication of rapid maxillary expansion and distal movement of the first molars, are discussed.

scholarly journals Molar Changes with Cervical Headgear Alone or in Combination with Rapid Maxillary Expansion

2008 ◽  
Vol 78 (5) ◽  
pp. 847-851 ◽  
Author(s):  
Marcel Marchiori Farret ◽  
Eduardo Martinelli S. de Lima ◽  
Vanessa Pereira Araújo ◽  
Susana Maria Deon Rizzatto ◽  
Luciane Macedo de Menezes ◽  
...  
Keyword(s):  
Class Ii ◽  
Rapid Maxillary Expansion ◽  
Control Group ◽  
Maxillary Expansion ◽  
Lateral Cephalograms ◽  
Cervical Traction ◽  
Permanent Molars ◽  
Group 2 ◽  
First Permanent Molars ◽  
Group 1

Abstract Objective: To test the hypothesis that there is no difference in the distal movement of the maxillary first permanent molars when cervical headgear is used alone or in combination with rapid maxillary expansion. Materials and Methods: The sample was composed of 36 subjects (aged 9 to 13 years), treated in the Faculty of Dentistry, Pontifícia Universidade Cat;aaolica, Rio Grande do Sul, Brazil. The individuals were in good health and in their pubertal growth period. All had Class II division 1 malocclusion. The patients were divided into two groups: group 1 (22 subjects), Class II, with a normal transverse maxilla treated with cervical traction headgear (HG) 400 g 12 h/d, and group 2 (14 subjects), Class II maxillary transverse deficiency treated with rapid maxillary expansion plus cervical traction headgear (RME + HG). An additional group 3 (17 subjects) served as a control group and included individuals with the same characteristics. All subjects had two lateral cephalograms: initial (T1) and progress (T2), taken 6 months later. Differences between T1 and T2 were compared with the Student's t-test, and three groups were compared by the analysis of variance and Tukey multiple comparison test. Results: Results showed greater distal tipping and greater distal movement of the first permanent molars in group 1 (HG) than in group 2 (RME + HG), P < .05. No extrusion of first permanent molar occurred in either group (P > .05). Conclusion: The hypothesis was rejected. Cervical traction headgear alone produced greater distal movement effects in maxillary first permanent molars when compared with rapid maxillary expansion associated with cervical headgear.

scholarly journals A Four-Year Follow-Up Case Report of Hypomineralized Primary Second Molars Rehabilitated with Stainless Steel Crowns

Children ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 923
Author(s):  
Luísa Bandeira Lopes ◽  
Vanessa Machado ◽  
João Botelho
Keyword(s):  
Stainless Steel ◽  
Case Report ◽  
General Anesthesia ◽  
Treatment Approach ◽  
Primary Molars ◽  
Second Primary ◽  
Correct Treatment ◽  
Permanent Molars ◽  
First Permanent Molars

Hypomineralized primary second molars (HPSM) are characterized by enamel opacities accompanied by hypersensitivity and atypical caries lesion, on one to four primary second molars. The correct treatment and follow-ups of those teeth have an important impact on a correct eruption of the first permanent molars and future occlusion. Hence, this report aims to describes a case of a severe HPSM in all second molars of a four-year-old girl and subsequent four-year follow-ups. The rehabilitation involved the placement of four stainless steel crowns on all four second primary molars under general anesthesia. Concerning the available literature and the case severity of HPSM, the treatment approach proposed for the case provided good functional outcome.

scholarly journals Mechanical evaluation of quad-helix appliance made of low-nickel stainless steel wire

2013 ◽  
Vol 18 (3) ◽  
pp. 35-38
Author(s):  
Rogério Lacerda dos Santos ◽  
Matheus Melo Pithon
Keyword(s):  
Stainless Steel ◽  
Elastic Modulus ◽  
Steel Wire ◽  
Multiple Comparisons ◽  
Steel Alloy ◽  
Mechanical Compression ◽  
Stainless Steel Alloy ◽  
Steel Wires ◽  
Significant Difference ◽  
Quad Helix

OBJECTIVE: The objective of this study was to test the hypothesis that there is no difference between stainless steel and low-nickel stainless steel wires as regards mechanical behavior. Force, resilience, and elastic modulus produced by Quad-helix appliances made of 0.032-inch and 0.036-inch wires were evaluated. METHODS: Sixty Quad-helix appliances were made, thirty for each type of alloy, being fifteen for each wire thickness, 0.032-in and 0.036-in. All the archwires were submitted to mechanical compression test using an EMIC DL-10000 machine simulating activations of 4, 6, 9, and 12 mm. Analysis of variance (ANOVA) with multiple comparisons and Tukey's test were used (p < 0.05) to assess force, resilience, and elastic modulus. RESULTS: Statistically significant difference in the forces generated, resilience and elastic modulus were found between the 0.032-in 0.036-in thicknesses (p < 0.05). CONCLUSIONS: Appliances made of low-nickel stainless steel alloy had force, resilience, and elastic modulus similar to those made of stainless steel alloy.

scholarly journals Single-Layer Mass Closure of Major Laparotomies by Continuous Suturing

1979 ◽  
Vol 72 (12) ◽  
pp. 889-893 ◽  
Author(s):  
A V Pollock ◽  
M J Greenall ◽  
Mary Evans
Keyword(s):  
Stainless Steel ◽  
Suture Material ◽  
Steel Wire ◽  
Single Layer ◽  
Polyglycolic Acid ◽  
Wound Sepsis ◽  
Deep Bite ◽  
Continuous Layer ◽  
The Mean ◽  
Male Sex

Surgeons who close major laparotomy incisions in a single layer (excluding skin) usually put interrupted sutures of non-absorbable monofilament material. In 305 consecutive patients we have, instead, used continuous deep-bite mass sutures with satisfactory results. The suture material, chosen at random, was either monofilament nylon, monofilament stainless steel wire or polyglycolic acid (PGA). The length of material used was measured, and this figure divided by the number of bites to give the mean distance from the cut edges at which the needle had been inserted. The ratio of length of suture material to number of bites ranged from 3-10 em (mean 5.90, s.d.I.46). There were no burst abdomens, but 26 incisonal hernias were detected within six months of operation; these were significantly associated with male sex, old age, long incisions, long operations, postoperative coughing and distension, blood transfusion and wound sepsis. Steel sutures were removed from 5 patients because of pain or sinuses, and nylon sutures from one. We conclude that laparotomy closure by a single continuous layer of sutures is satisfactory, and that there is little to choose among nylon, PGA and steel. The incidence of incisional hernias would be reduced by the elimination of wound sepsis.

scholarly journals Dental arch response to Haas-type rapid maxillary expansion anchored to deciduous vs permanent molars: A multicentric randomized controlled trial

2014 ◽  
Vol 85 (4) ◽  
pp. 570-576 ◽  
Author(s):  
Alessandro Ugolini ◽  
Carmen Cerruto ◽  
Luca Di Vece ◽  
Luis Huanca Ghislanzoni ◽  
Chiarella Sforza ◽  
...  
Keyword(s):  
Controlled Trial ◽  
Rapid Maxillary Expansion ◽  
Dental Arch ◽  
Maxillary Expansion ◽  
Posterior Crossbite ◽  
Permanent Molar ◽  
Permanent Molars ◽  
Deciduous Molars ◽  
First Permanent Molars ◽  
Intercanine Distance

ABSTRACT Objective:  To assess maxilla and mandibular arch widths' response to Haas-type rapid maxillary expansion (RME) anchored to deciduous vs permanent molars on children with unilateral posterior crossbite. Materials and Methods:  Seventy patients with unilateral posterior crossbite recruited at the Universities of Genova, Siena, and Insubria (Varese) were randomly located into GrE (RME on second deciduous molars) or Gr6 (RME on first permanent molars) and compared. Results:  Upper intermolar distance and permanent molar angulation increased significantly in Gr6 vs GrE at T1. Upper intercanine distance increased significantly in GrE vs Gr6 at T1 and T2. GrE showed significant increases for upper intermolar and upper intercanine widths. Gr6 showed statistically significant increases for upper intermolar widths, for upper and lower intercanine widths, and for increases of angulation of upper and lower permanent molars. Conclusions:  GrE showed reduced molar angulation increases at T1 and reduced molar angulation decreases at T2 when compared with Gr6. At T2, the net increase of the upper intercanine distance in GrE was still significant compared with Gr6, indicating a more stable expansion in the anterior area.

scholarly journals Three Palatal Arches Used to Correct Posterior Dental Crossbites

2006 ◽  
Vol 76 (6) ◽  
pp. 1047-1051 ◽  
Author(s):  
Fernando Lima Martinelli ◽  
Priscilla Sobral Couto ◽  
Antonio Carlos Oliveira Ruellas
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Statistical Analysis ◽  
Orthodontic Treatment ◽  
Elasticity Modulus ◽  
Steel Wire ◽  
Testing Machine ◽  
Stainless Steel Wire ◽  
Quad Helix ◽  
One Way Anova

Abstract Objective: To assess the force, resilience, and elasticity modulus produced by the Coffin appliance, “W” arch, and quad-helix made with 0.032-inch and 0.036-inch stainless steel wire. Materials and Methods: Two groups of 15 arches were made as Coffin appliances, two groups of 15 arches were made as “W” arches, and two groups of 15 arches were made as quad-helices. One group of each appliance was formed in 0.032-inch and one group in 0.036-inch stainless steel wire. All arches (6 groups of 15 each) were submitted to compression trials in the mechanical testing machine EMIC DL-10000, simulating 5-, 8-, 10-, and 12-mm activation. The force and resilience means received a one-way ANOVA statistical analysis. Results: The results showed that the mechanical properties depended on the shape of the appliance, the diameter of the wire used, and the amount of activation. Conclusions: The three appliances assessed produce appropriate forces for orthodontic treatment as long as they are correctly planned during clinical application.

scholarly journals II CLAS ELASTICS INFLUENCE ON OCCLUSION CHARACTERISTICS IN THE TREATMENT OF COM BINED FORMS OF OCLUSION ANOMALIES

2013 ◽  
Vol 9 (4) ◽  
pp. 64-66 ◽  
Author(s):  
П. Ишмурзин ◽  
P. Ishmurzin ◽  
М. Пономарева ◽  
M. Ponomareva ◽  
А. Лисовенко ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Clockwise Rotation ◽  
Deep Bite ◽  
Mandibular Plane ◽  
Permanent Molars ◽  
Proportional Relationship ◽  
Distal Occlusion ◽  
First Permanent Molars

<p>The article shows еру analysis of skeletal and dental modifications in 30 patients in period of complete growth of maxillofacial complex. All patients underwent orthodontic treatment for combined form of distal occlusion and deep bite by II class mechanics (including II class intermaxillary elastics). We’ve also detected proportional relationship between increase in occlusion plane inclination and mandibular plane inclination. Extrusion of first permanent molars is absolute and it initiates mandibular clockwise rotation.</p>

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