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A Modification of the Hawley Retainer
INCIDENTS OF PRACTICE C a s e o f T o o t h F u s io n By F. J. L o u g h l in ,* D .D.S., Bangor, Maine I n the accompanying roentgenogram o f the lower anterior teeth of a 13-year-old girl, the lower right central and lateral in cisors appear to be fused. This is not the case. The patient has three other lower incisors in addition to this two-crowned lateral in-
surface of one cuspid to the mesial surface of the opposite cuspid, be constructed of 0.028 resilient round wire with an open loop at the midline (Fig. 2). Resilient round wire, 0.028, can be easily adapted so that a tooth
T w o crow ned lateral incisor w ith one root.
cisor with one root. T he rest of the teeth in the mouth are of normal structure. The upper right second bicuspid is impacted in lingual version.
Fig. 1.— H a w le y retainer (lab ial section).
Station H ospital, D ow Field. *L ieu ten an t, D en tal Corps.
A
M o d i f i c a t io n o f t h e H a w l e y R e t a in e r By W a l t e r H. J a c o b s , D.D.S., New York, N. Y. V e r y o ften , u p on c o m p le tio n of o rth o do n tic treatm en t, th ere is still n eed fo r an a ctiv e fo rc e to p rev en t a relap se in the an terior segm en t of th e arch , or even to con tin u e sligh t m o vem en t o f th e u p p e r a n terio r teeth lin g u a lly . A ch a n g e in th e d e sign o f th e la b ia l section of th e H a w le y re tain er, as describ ed b e lo w , w ill p e rm it posi tiv e pressure again st the an terior teeth if requ ired .
Instead of the straight, flat section of wire which is used in the labial portion (Fig. 1), it is suggested that this part, from the mesial Jour. A.D.A., Vol. 29, October 1, 1942
F ig. 2.— R etain er substituted fo r H a w le y app lian ce (Fig. 2 ).
with a tendency to move out of alinement can, by slight adjustment of the open loop and the wire, be brought back to position. T he open loop at the midline can be closed gradually, if desired, and, in this way, the I9 I4
I ncidents
of
THEORY
T he old saying that we are “fearfully and wonderfully made” is truly evinced in study ing the normal facial contours. Anatomic examinations reveal that there is a corre sponding harmony of interrelated parts of the body. For our considerations, four meas urements are important: from ala to ala of the nose during the inspiratory pause; from
124 West Ninety-Third Street.
F acial H a r m o n y B ernard D.
L y n n , D.D.S., Detroit,
Mich. O ne o f th e m o st b a fflin g p ro b le m s o f fu ll
B E .N T
FOK
M A T E R IA L S
------------------ fe"------
1
Ciurjhutu
i— 1
h
S
ll I llillllllllln illim U l
b
T
a
1915
cordant relationship in an astonishing, maca bre appearance that causes the operator no little embarrassment. It is the purpose of this paper to suggest a few simple methods by which the esthetic effects of the restoration can be enhanced.
anterior teeth will have a slight but constant pressure against them, with a tendency to move the teeth lingually. It is important to make sure that the open loop does not interfere with the frenum. That part of the retainer directly in contact with the lingual surfaces of the anterior teeth should be relieved if the 0.028 wire is to be given a lingual adjustment.
By
Practice
1
A l-U M IN U M
STM P
&AU&E—
1— 1—
I
r
» to 11 M. »
PRePARB-D RULER Figure r.
denture prosthesis concerns the harmonious relationship of the restorative appliance to the rest of the face after completion of the dentures. Even before the era of J. Leon Williams and Alfred Gysi, dentists tried in many ways to measure iif precise numerical quantities certain relationships that would give a truely harmonious value to the patient, and ingloriously failed. However, if, instead of numerical quantities, certain easily ascer tained values are sought, the resultant har mony greatly enhances the appearance. A ll too often, we see the results of a dis-
the angle of the eye (external canthus) to the angle of the mouth; from the base of the vertical septum of the nose (columella) to the vermilion border of the lower lip, and from the same position (columella) to the inferior border of the chin (symphysis mandibulae). The distance from ala to ala of the nose invariably determines the distance from the center of one cuspid tooth to the center of the cuspid tooth on the opposite side. Thus, with this measurement, a more harmonious width of the arch is assured. When the distance from the comer of the
surface of one cuspid to the mesial surface of the opposite cuspid, be constructed of 0.028 resilient round wire with an open loop at the midline (Fig. 2). Resilient round wire, 0.028, can be easily adapted so that a tooth
T w o crow ned lateral incisor w ith one root.
cisor with one root. T he rest of the teeth in the mouth are of normal structure. The upper right second bicuspid is impacted in lingual version.
Fig. 1.— H a w le y retainer (lab ial section).
Station H ospital, D ow Field. *L ieu ten an t, D en tal Corps.
A
M o d i f i c a t io n o f t h e H a w l e y R e t a in e r By W a l t e r H. J a c o b s , D.D.S., New York, N. Y. V e r y o ften , u p on c o m p le tio n of o rth o do n tic treatm en t, th ere is still n eed fo r an a ctiv e fo rc e to p rev en t a relap se in the an terior segm en t of th e arch , or even to con tin u e sligh t m o vem en t o f th e u p p e r a n terio r teeth lin g u a lly . A ch a n g e in th e d e sign o f th e la b ia l section of th e H a w le y re tain er, as describ ed b e lo w , w ill p e rm it posi tiv e pressure again st the an terior teeth if requ ired .
Instead of the straight, flat section of wire which is used in the labial portion (Fig. 1), it is suggested that this part, from the mesial Jour. A.D.A., Vol. 29, October 1, 1942
F ig. 2.— R etain er substituted fo r H a w le y app lian ce (Fig. 2 ).
with a tendency to move out of alinement can, by slight adjustment of the open loop and the wire, be brought back to position. T he open loop at the midline can be closed gradually, if desired, and, in this way, the I9 I4
I ncidents
of
THEORY
T he old saying that we are “fearfully and wonderfully made” is truly evinced in study ing the normal facial contours. Anatomic examinations reveal that there is a corre sponding harmony of interrelated parts of the body. For our considerations, four meas urements are important: from ala to ala of the nose during the inspiratory pause; from
124 West Ninety-Third Street.
F acial H a r m o n y B ernard D.
L y n n , D.D.S., Detroit,
Mich. O ne o f th e m o st b a fflin g p ro b le m s o f fu ll
B E .N T
FOK
M A T E R IA L S
------------------ fe"------
1
Ciurjhutu
i— 1
h
S
ll I llillllllllln illim U l
b
T
a
1915
cordant relationship in an astonishing, maca bre appearance that causes the operator no little embarrassment. It is the purpose of this paper to suggest a few simple methods by which the esthetic effects of the restoration can be enhanced.
anterior teeth will have a slight but constant pressure against them, with a tendency to move the teeth lingually. It is important to make sure that the open loop does not interfere with the frenum. That part of the retainer directly in contact with the lingual surfaces of the anterior teeth should be relieved if the 0.028 wire is to be given a lingual adjustment.
By
Practice
1
A l-U M IN U M
STM P
&AU&E—
1— 1—
I
r
» to 11 M. »
PRePARB-D RULER Figure r.
denture prosthesis concerns the harmonious relationship of the restorative appliance to the rest of the face after completion of the dentures. Even before the era of J. Leon Williams and Alfred Gysi, dentists tried in many ways to measure iif precise numerical quantities certain relationships that would give a truely harmonious value to the patient, and ingloriously failed. However, if, instead of numerical quantities, certain easily ascer tained values are sought, the resultant har mony greatly enhances the appearance. A ll too often, we see the results of a dis-
the angle of the eye (external canthus) to the angle of the mouth; from the base of the vertical septum of the nose (columella) to the vermilion border of the lower lip, and from the same position (columella) to the inferior border of the chin (symphysis mandibulae). The distance from ala to ala of the nose invariably determines the distance from the center of one cuspid tooth to the center of the cuspid tooth on the opposite side. Thus, with this measurement, a more harmonious width of the arch is assured. When the distance from the comer of the