ADJUSTABLE EXTRA ORAL TRACER

Abstract

ABSTRACT Accurate recording of horizontal jaw relations is a cornerstone in prosthodontics and occlusal rehabilitation, providing the foundation for creating well-fitting dental prostheses and achieving optimal occlusion. Traditional methods, such as the Needle House tracer, have long been utilized for capturing mandibular movements and producing intraoral tracings that guide prosthetic design. However, these methods, while effective, often rely on manual interpretation of tracings, which can introduce variability and subjectivity into the process. Tracers are designed to record the pathway transversed by the condyle during dynamic movements. Based on the location of usage it is divided into intra oral and extra oral tracers. Recordings of intra oral tracers are more accurate than that of extra oral tracers as it is closer to the TMJ compared to that of the extra oral tracer.Thus this invention increases the accuracy of extra oral tracing by providing an adjustable arm for the extra oral tracer. The Solution provided in this Adjustable extra oral tracer, is the compressable upper and lower elongated tracer arms during Gothic arch tracing. After the clinical procedure the upper and lower arms are made to elongate in such a way transformed to the articulator.

Specification

FORM - 2
THE PATENTS ACT, 1970
(39 OF 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(see Section 10 & rule 13)

1. TITLE OF THE INVENTION:
Adjustable Extra Oral Tracer

2. APPLICANT:
S.No NAME NATIONALITY ADDRESS
1 Saveetha Institute of Medical
and Technical Sciences
INDIAN
No: 162, Poonamallee High
Road, Velappanchavadi,
Chennai-600077

3. PREAMBLE TO THE DESCRIPTION:
The following specification describes the invention and how it is to be performed.

Bank : INDUSIND BANK
Branch : NUNGAMBAKKAM ((SAVEETHA UNIVERSITY))
DD No : 402515
DD Date : 19/10/2024
Amount: 8900/-

TITLE OF INVENTION
Adjustable Extra Oral Tracer.
FIELD OF INVENTION
Dentistry

INTRODUCTION
In the horizontal plane, the mandible can be related to the maxilla in several positions. Among these centric relation holds a significant position of high value and importance, because of its usefulness in relating to the maxilla, where the teeth, muscles and the TMJ function in harmony. The definite positioning of the prosthesis into centric relation will determine the accurate position of the mandible and hence will project the future success of treatment. To understand the Gothic Arch tracing one must understand the importance, correlation and
significance of Centric relation (GPT 9), which will not only help in tracing the arch but also establish a strong base for the complete denture prosthesis's success. Basically, it is the position from which, the excursive movements of occlusion start and in which the teeth meet in habitual closing movements. The tentative
jaw relationship using the denture base and occlusion rims is most widely used in clinical practices. However, many dentures with an unstable occlusion are seen, which can be attributed to the errors which occur during the clinical procedures.
A proper reproduction of centric relation and establishing the vertical dimension is the key to the success of any prosthesis. The arrow point tracing is a better method which records the mandibular border movements in the horizontal plane and also provides a reproducible mandibular posterior border position.

Recording centric relation in edentulous subjects Centric jaw relation in edentulous patients are commonly recorded using: Wax closure method,
Functional chew in technique, Graphic method and Anterior deprogrammers. The differences in the concepts of occlusion and posterior tooth form in fabricating complete dentures creates the differences in the merits of eccentric records.

Gothic arch tracing The Horizontal Jaw relation is recorded using the gothic arch tracer. The patient will need to return to the clinic in this case, however, the ultimate choice may be made using the gothic arch trace. The masticatory muscles
surrounding the TMJ would be free to return to their correct physiological position if we could remove the wax bite rim and confine masticatory forces to a central bearing point in the mouth, creating a fulcrum of support for the mandible.
By doing this, a patient-generated vertical could be easily and precisely recorded. Without a doubt, the intersection of protrusive and excursive motions would accurately reflect the centric relation if there were a mechanism to record the path through these movements. The Gothic Arch Tracer precisely accomplishes this Certain border movements are observed to obtain such a tracing. An inward and forward lateral movement of one condyle is followed by a movement in the opposite direction with rotation taking place around the opposing condyle, these movement cut lines go all the way to the point where both condyles are most
retruded. The needlepoint of the trace will therefore be resting at the apex of the trace when both condyles are in their most retruded position. A needlepoint tracing is essentially a single representation of the mandibular region and its
movements in a horizontal plane.

BACKGROUND OF THE INVENTION
Recordings of intra oral tracers are more accurate than extra oral tracers. But as the intra oral recording are done inside the patient's mouth and are very minute, extra oral tracers are used to monitor the path of the condyle. But in some cases
the distance between the wax rims and the extra oral tracer stage can be too long or short when it is fixed.

HISTORY
Types of tracers:
1. Intra oral tracers
2. Extra oral tracers
3. Graphic tracers
4. Radiographic tracers

OBJECTIVES

1. To achieve stability during gothic arch tracing records
2. To minimize displaceability and resiliency of denture bearing tissues
3. To minimize materials used in record making
4. To Overcome inability of muscle coordination by the patient

SUMMARY OF THE PRESENT INVENTION
Tracers are devices designed to record the condylar path in the patient and transfer it to the articulator. This device records the pathway of the condyle and helps transfer the record to the articulator. Thus the articulator programmed with this record serves as patients TMJ in their absence.

Basically there are two types of tracers and they are intra oral and extra oral tracers. Recordings of intra oral tracers are more accurate than extra oral tracers. But as the intra oral recording are done inside the patient's mouth and are very
minute, extra oral tracers are used to monitor the path of the condyle. But in some cases the distance between the wax rims and the extra oral tracer stage can be too long when it is fixed. Thus we have designed a tracer with adjustable arms that help modify the distance between tracer and the rims.

Adjustable extra oral tracer, is the compressable upper and lower elongated tracer arms during Gothic arch tracing. After the clinical procedure the upper and lower arms are made to eloneate in such a wav transformed to the articulator.

DETAILED DESCRIPTION OF THE INVENTION
The factors that contribute to the inaccuracy of centric record in edentulous patient are as follows: • Instability of records • Displaceability and resiliency of denture bearing tissues • Materials used in record making • Equipment used in record making Inability of muscle coordination by the patient • The commonly
used articulators which do not adjust to all the lateral interocclusal check records accurately. Interocclusal records The inter-occlusal records and their accurate recording also play a key role during the clinical procedure of gothic arch tracing. However, accuracy is at times questionable, be it in terms of the record produced or its representation on the articulator, which finally dictates the fabrication of the
prosthesis. Many conclusions have been made, regarding the perfect material for the inter-occlusal record. Trapozzano stated that wax checkbite method was more accurate. According to Schuyler, if the recording medium's density and viscosity were not consistent, uneven pressures would be transferred to the record bases,
which would lead to an unbalanced occlusion. For occlusal records, he stated that modeling compound is superior to wax because it may be softened more evenly, cools more slowly, and exhibits less distortion. For the record, Payne and Hickey
preferred plaster since less material needed to be put in the patient's mouth. Dental materials such as plaster or zinc oxide-eugenol paste, which was considered more accurate. Hanau was among the first people to think about pressure equalization
when recording the bite. He proposed the acronym "Realeff," which stands for "resilient and like effect." The resilience of the oral tissues evolved to be a crucial element in "checkbite" approaches. Wright had mentioned the resiliency of tissue, saliva film, fit of denture bases, and pressure exerted as elements that he believed
affected the accuracy of records. He concluded that the ideal strategy was to record the occlusal record at zero pressure because the dentist couldn't control the pressure at which the record was created. Thus, it might be reproduced. Gysi
performed this technique on manikins and found that neither wax nor compound produced the same recording twice. He concluded that distortion was caused by the material's uneven cooling. He only discovered accurate plaster for interocclusal recording.

DIMENSIONS

Moving Arm
Length - 10 mm to 300 mm
Stable Arm
Length - 10 mm to 300 mm

ADVANTAGES
a. Better stability during gothic arch tracing records
b. Reduced displaceability and resiliency of denture bearing tissues
c. Adjustable Tracing arms enabe to easy recording
d. Better muscle coordination by the patient

CLAIMS

I/We Claim,
Claim 1: Adjustable Extra Oral Tracer, said Adjustable Extra Oral Tracer includes:
a Moving arm (1),
a Stable arm (2)

Claim 2: Adjustable Extra Oral Tracer of Claim 1, Wherein the Moving arm (1) can be pulled out or pushed into Stable,arm(2).

Claim 3: Adjustable Extra Oral Tracer of Claim 1, Wherein the Moving arm (1) has a track which facilitates easy movement.

Claim 4: Adjustable Extra Oral Tracer of Claim 1, Wherein the Moving arm (1) can be pushed in during Gothic arch tracing.

Claim 5: Adjustable Extra Oral Tracer of Claim 1, Wherein the Moving arm (1) can be pulled out during transferring to articulator.

References:
28-0ct-2O24/130613/202441082035/Form 2(Title Page)
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2. ML Myers. "Centric relation records-historical review". Journal of Prosthetic
Dentistry 47.2 (1982): 141-145.
3. Chandrasekharan Nair K. "Programming the semiadjustable articulator".
TPDI2.1 (2011): 1-3.
4. B Poojitha. "An insight into gothic arch tracing". TPDI 10.1-2 (2019).
5. Jeffrey P Okeson. "Management of temporomandibular disorders and
occlusion". 7th edition. Elsevier (2012).
6. Vincent Trapozzano. "An analysis of current concept of occlusion". Journal
of Prosthetic Dentistry 5.6 (1995): 764-782.
7. Y Babita and K Nikita. "A pathway to centric-gothic arch". IJAMSCR 3.3
(2015): 308-312.
8. Rubel B and Hill EE. "Intraoral gothic arch tracing". New York State Dental
Journal 77.5 (2011): 40-43.

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