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An easily adjustable lingual lock for use with removable lingual arches
The International Journal of
Orthodontia and Oral Surgery (All rights strictly reserved)
ST.
VOL. VII
LOUIS, JANUARY,
1921
NO.1
ORIGINAL ARTICLES AN EASILY ADJUSTABLE LINGUAL LOCK FOR USE WITH REMOVABLE LINGUAL ARCHES By
L OWR IE
J.
P ORTER,
D.D .S.,
~EW Y ORK C ITY
I nst ructor in Ort hodontia, College of Dental {bud Oral Surgery; Clin ical I nstructor in th e Dewey Sc hoo! of Ort hodont ia
I X CE the publicati on of the August issue of this in which an S . article under the above heading was published, I have had so many inquiries J OURNAL
by letter in r egard to the making of this lock, that it has seemed advisable to give a lit tl e further description of th e device togeth er with illustrations. 'I'his lock is mad e of t wo parts: 1. Lug soldered to a backing. 2. Rectangul ar tube to fit lu g.
~ . ,
.
.
- --
-
e-
-- -
.-
_
-
LUG SOLDERED TO BRC/(IrtG,
rose
TO FIT
w e,
REROY FOR SOLO£ Rl ffG TO BliND
LUG ~o Tt/ B £ - flSSE/1 IJU17 F ig . 1.
A 24- or 25-gauge spring wire is used to lock the tube on the lug. F or ordinary mov ements I use 25-gaug e spring wire as it is easier to remove, but, if th e movement is a lin gu al movement or a ro ta tion of the mol ars, I use 1
2
Th e I nternationai Journal of Orthodontia and Oral Surgery
24-gauge as it fits the gr oove very accurately and makes the appliance very stable bu cca-lingually. With the 25·gauge wir e it is stable occluso -gingivally, which is the ordina ry stability desired. F ig. 1 shows the lug and tube as now made by the Blue Island Spe cialty Co., of Blue Island, Ill. The back is attached to the lu g to facilitat e sold erine." thus eliminat ing, to a large extent, the danger of solder flowing onto th e lu g and preventing th e t ube from sliding into pla ce.
... F ig. 3.
F ig. 2.
F ig. 4.
Th e lug should first be soldered to the band with 18 karat solder in the position desired on the molars. I t is best here to flow a little solder on th e band first and after heating this up hold the lu g in position with a pair of tw eezers to solder. Thus the lug is heated but little and th e solder is not liable to flow over the lu g, neither will the backin g be burned. The gr oove on the lug is to fit th e 24- or 25-gauge wire for l ocking the tube to the lug. It is well now t o polish the lu g on t he band b efore attemp ting to make the r est of the appliance, as it greatly in cr eases the ease of placing an d r emov-
Fig . S.
F ig. 6.
in g t he tubes from t he lugs in the constr uction and adjustment of t he appliance. The lingual arch or base wire is next sha ped as desired and the tubes soldere d t o it . Then pl ace th e tubes over the lu gs with the ar ch in place and heat to a cherry red to mak e the ar ch p erfectly passive and leave no strain on th e molars. Complet e te chnic f or this was given in th e August issue . Th is arc h ma y also be made in three pi eces if desired and th en soldered together, rather than shaping one base wire.
Lingual Lock for Removable Lingual Arches
3
Fig. 2 shows the lug soldered to the band and also plainly shows the groove in which the locking wire fits to hold the tube tight to the lug. Fig. 3 illustrates the tube soldered to the arch ready for placement over the lugs on the bands, and Fig. 4 shows the arch, tube and lug assembled. The locking wire will here be noticed in place in the groove in the lug. I now make this spring longer than was shown in the previous description, as I find it works much better in placing and removing from the mouth. This spring wire is soldered gingivally to the arch and about half an inch forward to the lug. It is then carried back, up and over the lug to fall into the groove. This gives a long elastic spring which is very easily manipulated.
Fig. 7.
Fig. 8.
Fig. 9.
Fig. 10.
F'ig. 5 shows a lower lingual appliance from a side view with the lock in position and Pig. 6 shows the occlusal view of the same. The base wire is of I8-gauge and serves as a molar stabilizer and also gives attachment for springs, etc. The ease of adjustment, ease of placing and removing from the mouth together with the stability gained has amply given satisfaction and pleasure in the use of this lock. Figs. 7 and 8 illustrate other appliances used with this lock in position. Fig. 9 illustrates the use of this lock in a case of unilateral expansion. The molar and two premolars on the left side are to be moved buccally without
4
The International Journal of Orthodontia and Oral Surgery
moving the teeth on the right side. Therefore a round tube has been used on the left molar band (F'ig. 10) which allows tipping of this tooth but on the right side the lock described above is used (Fig. 11) which gives stationary anchorage and this, being also reinforced by the five adjacent teeth, practically insures sufficient resistance to move the three teeth on the opposite side of the arch. In using the round tube in conjunction with this lock the lingual appliance must be placed in the round tube first and that side carried fully to position and then the square tube will slip over the lug with no difficulty.
Fig. 11.
Emphasis must be placed on the fact that the bands should accurately fit the teeth and have a good impression taken with the bands on the teeth and a model made with the bands thus in place before the appliance is constructed. Then cement the appliance in place as a retainer with both bands attached to the lingual appliance. Be sure the bands are cemented on the teeth as they were when fitted. This is very important. Otherwise the molar teeth will be moved and will become sore at first. 1£ the correct technic is used I believe this lock will prove most satisfactory to anyone using lingual appliances, as stability and ease of placing and removing are most certainly gained.
Orthodontia and Oral Surgery (All rights strictly reserved)
ST.
VOL. VII
LOUIS, JANUARY,
1921
NO.1
ORIGINAL ARTICLES AN EASILY ADJUSTABLE LINGUAL LOCK FOR USE WITH REMOVABLE LINGUAL ARCHES By
L OWR IE
J.
P ORTER,
D.D .S.,
~EW Y ORK C ITY
I nst ructor in Ort hodontia, College of Dental {bud Oral Surgery; Clin ical I nstructor in th e Dewey Sc hoo! of Ort hodont ia
I X CE the publicati on of the August issue of this in which an S . article under the above heading was published, I have had so many inquiries J OURNAL
by letter in r egard to the making of this lock, that it has seemed advisable to give a lit tl e further description of th e device togeth er with illustrations. 'I'his lock is mad e of t wo parts: 1. Lug soldered to a backing. 2. Rectangul ar tube to fit lu g.
~ . ,
.
.
- --
-
e-
-- -
.-
_
-
LUG SOLDERED TO BRC/(IrtG,
rose
TO FIT
w e,
REROY FOR SOLO£ Rl ffG TO BliND
LUG ~o Tt/ B £ - flSSE/1 IJU17 F ig . 1.
A 24- or 25-gauge spring wire is used to lock the tube on the lug. F or ordinary mov ements I use 25-gaug e spring wire as it is easier to remove, but, if th e movement is a lin gu al movement or a ro ta tion of the mol ars, I use 1
2
Th e I nternationai Journal of Orthodontia and Oral Surgery
24-gauge as it fits the gr oove very accurately and makes the appliance very stable bu cca-lingually. With the 25·gauge wir e it is stable occluso -gingivally, which is the ordina ry stability desired. F ig. 1 shows the lug and tube as now made by the Blue Island Spe cialty Co., of Blue Island, Ill. The back is attached to the lu g to facilitat e sold erine." thus eliminat ing, to a large extent, the danger of solder flowing onto th e lu g and preventing th e t ube from sliding into pla ce.
... F ig. 3.
F ig. 2.
F ig. 4.
Th e lug should first be soldered to the band with 18 karat solder in the position desired on the molars. I t is best here to flow a little solder on th e band first and after heating this up hold the lu g in position with a pair of tw eezers to solder. Thus the lug is heated but little and th e solder is not liable to flow over the lu g, neither will the backin g be burned. The gr oove on the lug is to fit th e 24- or 25-gauge wire for l ocking the tube to the lug. It is well now t o polish the lu g on t he band b efore attemp ting to make the r est of the appliance, as it greatly in cr eases the ease of placing an d r emov-
Fig . S.
F ig. 6.
in g t he tubes from t he lugs in the constr uction and adjustment of t he appliance. The lingual arch or base wire is next sha ped as desired and the tubes soldere d t o it . Then pl ace th e tubes over the lu gs with the ar ch in place and heat to a cherry red to mak e the ar ch p erfectly passive and leave no strain on th e molars. Complet e te chnic f or this was given in th e August issue . Th is arc h ma y also be made in three pi eces if desired and th en soldered together, rather than shaping one base wire.
Lingual Lock for Removable Lingual Arches
3
Fig. 2 shows the lug soldered to the band and also plainly shows the groove in which the locking wire fits to hold the tube tight to the lug. Fig. 3 illustrates the tube soldered to the arch ready for placement over the lugs on the bands, and Fig. 4 shows the arch, tube and lug assembled. The locking wire will here be noticed in place in the groove in the lug. I now make this spring longer than was shown in the previous description, as I find it works much better in placing and removing from the mouth. This spring wire is soldered gingivally to the arch and about half an inch forward to the lug. It is then carried back, up and over the lug to fall into the groove. This gives a long elastic spring which is very easily manipulated.
Fig. 7.
Fig. 8.
Fig. 9.
Fig. 10.
F'ig. 5 shows a lower lingual appliance from a side view with the lock in position and Pig. 6 shows the occlusal view of the same. The base wire is of I8-gauge and serves as a molar stabilizer and also gives attachment for springs, etc. The ease of adjustment, ease of placing and removing from the mouth together with the stability gained has amply given satisfaction and pleasure in the use of this lock. Figs. 7 and 8 illustrate other appliances used with this lock in position. Fig. 9 illustrates the use of this lock in a case of unilateral expansion. The molar and two premolars on the left side are to be moved buccally without
4
The International Journal of Orthodontia and Oral Surgery
moving the teeth on the right side. Therefore a round tube has been used on the left molar band (F'ig. 10) which allows tipping of this tooth but on the right side the lock described above is used (Fig. 11) which gives stationary anchorage and this, being also reinforced by the five adjacent teeth, practically insures sufficient resistance to move the three teeth on the opposite side of the arch. In using the round tube in conjunction with this lock the lingual appliance must be placed in the round tube first and that side carried fully to position and then the square tube will slip over the lug with no difficulty.
Fig. 11.
Emphasis must be placed on the fact that the bands should accurately fit the teeth and have a good impression taken with the bands on the teeth and a model made with the bands thus in place before the appliance is constructed. Then cement the appliance in place as a retainer with both bands attached to the lingual appliance. Be sure the bands are cemented on the teeth as they were when fitted. This is very important. Otherwise the molar teeth will be moved and will become sore at first. 1£ the correct technic is used I believe this lock will prove most satisfactory to anyone using lingual appliances, as stability and ease of placing and removing are most certainly gained.