weldable wire connector: a new bracket-transfer system in ... · weldable wire connector: a new...

5

Original Article

Published on 10-10-09

Dr Kulbir Singh Goraya 1 Dr Bhavdeep Kaur Boparai 2

Authorrsquos affiliations

Weldable Wire ConnectorA New Bracket-Transfer System In Lingual Orthodontics

AbstractA new method regarding indirect bonding of lingual brackets is presented in this articleThis technique makes use of a special aid which is easy- to-construct and which

efficient manner

Key words Weldable wire connector transfer wire wire-resin tray indirect bonding lin-gual orthodontics

Introduction

Transferring lingual brackets from the indirect bonding model to the patientsrsquo teeth is an important yet a challenging task There are various reliable and time-tested transfer systems available for indirect bonding (1-3) In order to simplify the fabrication of transfer trays some of the manufacturers have created special accessories with their bracket system such as smart jig in Evolution bracket (Adenta GmgH Gilching Germany) and set-up wire in 3D torque lingual bracket (Forestadent) Since such accessories are not available with every lingual bracket system we have created a new aid called Weldable Wire Connector (WWC) that can work well with most of the commercially available bracket systems This aid has been evolved by incorporating ideas from other techniques (4-6) that utilize transfer wires to fabricate the wire-resin transfer trays In fabricating such transfer trays the use of a full-size rectangular transfer wire is desirable as it results in precise indirect bonding of brackets But this makes the separation of trays from the brackets a time consuming job For example in Arimarsquos Transferring Master Mold (6) a full-slot 018-inch x 025-inch stainless steel transfer wire is used for fabricating wire-resin transfer trays But in this technique separating the tray from the bonded bracket requires two steps First the resin part of the transfer tray is removed and then the transfer wire is released from the slot This article describes how WWC help disconnect the transfer trays in a simpler manner and fabricate individual wire-resin transfer trays that are reusable stable and accurate

1 Dr Kulbir Singh Goraya

BDS Private Practitioner

2 Dr Bhavdeep Kaur Boparai


Corresponding author

Dr Kulbir Singh Goraya 30-B [GF] Flats Ranjit Avenue Amritsar -143001 Punjab India Email ksg577yahoocom

___________________________

Virtual Journal of Orthodontics copy 1996 All rights reserved

Direttore ResponsabileDr Gabriele Floria

Iscrizione CCIAA ndeg 3151598ISSN-1128-6547NLM U ID 100963616OCoLC 40578647

Fax +39 055 390 90 14___________________________


AbstractA new method regarding indirect bonding of lingual brackets is presented in this article

helps facilitate both the transfer tray fabrication and the bracket-transfer procedures in a precise and efficient manner


Introduction

Transferring lingual brackets from the indirect bonding model to the patientsrsquo teeth is an important and a challenging task There are various reliable and time-tested transfer systems available for indirect bonding (1-3) In order to simplify the fabrication of transfer trays some of the manufacturers have created special accessories with their bracket system such as smart jig in Evolution bracket (Adenta GmgH Gilching Germany) and set-up wire in 3D torque lingual bracket (Forestadent) Since such accessories are not available with every lingual bracket system we have created a new aid called Weldable Wire Connector (WWC) that can work well with most of the commercially available bracket systems This aid has been evolved by incorporating ideas from other techniques (4-6) that utilize transfer wires to fabricate the wire-resin transfer trays In fabricating such transfer trays the use of a full-size rectangular transfer wire is desirable as it results in precise indirect bonding of brackets But this makes the separation of trays from the brackets a time consuming job For example in Arimarsquos Transferring Master Mold (6) a full-slot 018-inch x 025-inch stainless steel transfer wire is used for fabricating wire-resin transfer trays But in this technique separating the tray from the bonded bracket requires two steps First the resin part of the transfer tray is removed and then the transfer wire is released from the slot This article describes how WWC help disconnect the transfer trays in a simpler manner and fabricate individual wire-resin transfer trays that are reusable stable and accurate







___________________________




Fax +39 055 390 90 14___________________________


AbstractA new method regarding indirect bonding of lingual brackets is presented in this articleThis technique makes use of a special aid which is easy- to-construct and helps facilitate both the transfer tray fabrication and the bracket-transfer procedures in a precise and efficient manner


Introduction








___________________________




Fax +39 055 390 90 14___________________________




Introduction

Transferring lingual brackets from the indirect bonding model to the patientsrsquo teeth is an important yet a challenging task There are various reliable and time-tested transfer systems available for indirect bonding (1-3) In order to simplify the fabrication of transfer trays some of the manufacturers have created special accessories with their bracket system such as smart jig in Evolution bracket (Adenta GmgH Gilching Germany) and set-up wire in 3D torque lingual bracket (Forestadent) Since such accessories are not available with every lingual bracket system we have created a new aid called Weldable Wire Connector (WWC) that can work well with most of the commercially available bracket systems This aid has been evolved by incorporating ideas from other techniques (4-6) that utilize transfer wires to fabricate the wire-resin transfer trays In fabricating such transfer trays the use of a full-size rectangular transfer wire is desirable as it results in precise indirect bonding of brackets But this makes the separation of trays from the brackets a time consuming job For example in Arimarsquos Transferring Master Mold (6) a full-slot 018-inch x 025-inch stainless steel transfer wire is used for fabricating wire-resin transfer trays In this technique separating the tray from the bonded bracket requires two steps First the resin part of the transfer tray is removed and then the transfer wire is released from the slot This article describes how WWC helps disconnect the transfer trays in a simpler manner and helps fabricate individual wire-resin transfer trays that are reusable stable and accurate







___________________________




Fax +39 055 390 90 14___________________________




Introduction


To cite this articleKS Goraya BKBoparaiWeldable Wire ConnectorA New Bracket-Transfer Sys-tem In Lingual OrthodonticsVirtual Journal of Orthodontics [serial online] 2009 October 10 8 (3)p 1-4Available from URLhttpwwwvjoitreadphpfile=twbpdf

Laboratory Procedure

1 Take a 10-15mm of straight length of 017Primex025Prime Beta-titanium wire (Remati-tant special Dentaurum) and on its one end give a small 90deg bend (Fig01A) Take another piece of 018Prime x 025Prime Rematitant wire which is about 5mm in length (Fig01A) and weld the former piece of wire on one of its ends This L-shaped assembly is called a WWC (Fig01-B) For proper welding it is important to care-fully calibrate the spot welder (7-9)

6

Fig 01(A) The Vertical and horizontal parts of the WWC before welding (B) The weldable wire connector

2 Prepare the indirect bonding model and then position and bond brackets to the cast Figure 2 shows Evolution brackets positioned with the Hiro System (10-12) However this trans-fer system allows use of any bracket positio-ning system

Fig 02 The Hiro System of bracket positioning

3 Ligate WWCs in the bracket slots by keeping their weld joints distal to the brackets (Fig03) Order of positioning can be reversed according to the case keeping in view the position of the particular tooth (misaligned) in the malocclusion model Cut the protruding wires extending from mesial of the brackets if any

Fig 03 The WWCs are seen ligated to the brackets The arrow shows the bent WWC

4 Bend WWCs over the incisal edges occlusal surfaces of the teeth (Fig03)

After all the connectors are bent put light-cured Tiger Bond Band Cement (Class One Orthodon-tics Lubbock TX ) onto each connector and tooth in the following manner- In posterior teeth cover only the occlusal sur-face- In anterior teeth cover the incisal edge and some part of the labial surface Light cure the cement in order to complete the transfer tray fabrication process (Fig04) This selective co-verage of tooth surfaces will later on facilitate easy separation of the transfer tray from the bonded bracket

5 Gently remove all the transfer tray-bracket assemblies from the model and with help of a fine stone remove the resin flash from around the customized bracked pads 6 With the help of a Microetcher (Danville Ma-

terials San Ramon CA) gently microetch the customized bracket pads with 50 Micron Aluminium Oxide for 2-3 seconds Bracket pads are rinsed and dried and then these cu-stomized brackets are stored in a bracket ca-se

Fig 04 Single-tooth transfer tray for each bracket

Fig 05 Bonding of brackets in the mouth

7

Clinical Procedure

1 After the lingual surfaces of teeth are etched rinsed and dried apply bonding agent like Ort-hosolo (Ormco) to the lingual surface of the tooth and the corresponding bracket pad Also apply small amount of Enlight (Ormco) on the bracket pad and position the transfer tray-brac-ket assembly on the corresponding tooth and polymerize the resin with a curing light (Fig05) The same procedure is repeated on every tooth

2 In order to disconnect the transfer tray from the bracket release the wire from the slot Since the wire in the bracket slot is a full-size rectan-gular wire it is important to first lift the transfer tray by applying a mild tipping force in a labio-lingual direction (Fig06a) and then simulta-neously displace the transfer tray in the lingual direction (Fig06b) This will tease out the wire from the slot During this process the tray gets disconnected from the bracket in a safe manner without causing any damage to either of the two because of the superior springback properties of the Beta-titanium wire (13)

Fig 06 Separating transfer tray from the bracket (a) Support the bracket with a finger and gently lift (tip) the resin part of the tray (b) Displace the tray in lin-

gual direction by rotating it mesioharrdistally

Discussion

The special combination of beta-titanium wires used in constructing the WWC allows for the use of a full-size rectangular wire in the bracket slot and at the same time imparts sufficient flexibility to the transfer tray so that it can be quickly disconnected from the bonded bracket in a single step

Beta-titanium wire is no doubt less rigid than the stainless steel wire but its use in the fabrica-tion of a WWC offers sufficient rigidity to the transfer tray to accomplish the indirect bonding procedures in a reliable and accurate manner

Key Benefits

1 Transfer trays are reusable and stable

2 Trays can be easily positioned on the teeth and once the bonding is accomplished they can be quickly disconnected from their respective brackets resulting in reduced chair-time

3 Since trays are made up of wire-resin combi-nation complete brackets are visible during the bonding procedures enabling any flash to be easily removed before polymerization of the adhesive

4 Both self-cured and light-cured adhesives can be used for bonding and rebonding of brackets

8

References1 Frost LB Fillion D An overall view of the differ-

ent laboratory procedures used in conjunction with lingual orthodontics Sem Orthod 200612203-210

2 Hong RK Kim YH Park JY A new customized

lingual indirect bonding system J Clin Orthod 200034456-460

3 Echarri P Lingual technique indirect bonding

Double transfer tray technique World J Orthod 20067154-158

4 Hoffman Barry D Indirect bonding with a diagnostic setup J Clin Orthod 198822509-511

5 Hong RK Soh BC Customized indirect bonding method for lingual orthodontics J Clin Orthod

199630650-652

6 Arima VO Arima NE Eto LF Lingual technique- Arimarsquos transferring master mold

LingualNewsCom[serial online] 2008 Aug6(1) Available from

URL httpwwwlingualnewscomapage5938php

7 Burstone CJ Welding of tma wire clinical applica-tions J Clin Orthod 198721609-615

8 Nelson KR Burstone CJ Goldberg AJ Optimal

welding of beta titanium orthodontic wires Am J Orthod Dentofacial Orthop 198792213-219

9 Donovan MT Lin JJ Brantley WA Conover JP

Weldability of beta titanium arch wires Am J Orthod 198485207-216

10 Hiro T inventors Method of fitting bracket for

orthodontic appliance US patent 6174163 2001 Jan 16

11 Hiro T De la lglesia F Puigdollers A Indirect bonding technique in lingual orthodontics The hiro

system Prog Orthod 20089(2)34-45

12 Scuzzo G Takemoto K Hiro system laboratory procedure In Scuzzo G Takemoto K editors In-

visible Orthodontics current concepts and solutions in lingual orthodontics Berlin Quintessence 2003

p 39-45

13 Burstone CJ Goldberg AJ Beta titanium A new orthodontic alloy Am J Orthod 198077121-132

6

Fig 01(A) The Vertical and horizontal parts of the WWC before welding (B) The weldable wire connector

2 Prepare the indirect bonding model and then position and bond brackets to the cast Figure 2 shows Evolution brackets positioned with the Hiro System (10-12) However this trans-fer system allows use of any bracket positio-ning system

Fig 02 The Hiro System of bracket positioning

3 Ligate WWCs in the bracket slots by keeping their weld joints distal to the brackets (Fig03) Order of positioning can be reversed according to the case keeping in view the position of the particular tooth (misaligned) in the malocclusion model Cut the protruding wires extending from mesial of the brackets if any

Fig 03 The WWCs are seen ligated to the brackets The arrow shows the bent WWC

4 Bend WWCs over the incisal edges occlusal surfaces of the teeth (Fig03)

After all the connectors are bent put light-cured Tiger Bond Band Cement (Class One Orthodon-tics Lubbock TX ) onto each connector and tooth in the following manner- In posterior teeth cover only the occlusal sur-face- In anterior teeth cover the incisal edge and some part of the labial surface Light cure the cement in order to complete the transfer tray fabrication process (Fig04) This selective co-verage of tooth surfaces will later on facilitate easy separation of the transfer tray from the bonded bracket

5 Gently remove all the transfer tray-bracket assemblies from the model and with help of a fine stone remove the resin flash from around the customized bracked pads 6 With the help of a Microetcher (Danville Ma-

terials San Ramon CA) gently microetch the customized bracket pads with 50 Micron Aluminium Oxide for 2-3 seconds Bracket pads are rinsed and dried and then these cu-stomized brackets are stored in a bracket ca-se

Fig 04 Single-tooth transfer tray for each bracket

Fig 05 Bonding of brackets in the mouth

7

Clinical Procedure





Discussion



Key Benefits





8









199630650-652















p 39-45


7

Clinical Procedure





Discussion



Key Benefits





8









199630650-652















p 39-45


8









199630650-652















p 39-45


weldable wire connector: a new bracket-transfer system in ... · weldable wire connector: a new...

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