horizontal jaw relations

1. HORIZONTAL JAW RELATIONS IN
COMPLETE DENTURE

5. CENTRIC RELATIONS

76. PATIENT GUIDED
RECORDING
OPERATOR
GUIDED
RECORDING
MANDIBULAR
GUIDANCE METHOD

90. ROTH’S TECHNIQUE
This technique uses two steps:
In the first step and after placing the heated wax (Bite Registration
Sheet Wax, Almore Int. Inc.,
Portland,Oregon) in the subject’s mouth, the subject was instructed
to put their tongue to the roof of their mouth and relax their lower
jaw while the operator, holding the mandibular symphysis, guided the
lower incisors into the wax. Next, the subject was instructed to close
their posterior teeth into the wax. When the cusp tips of the lower
posterior teeth had impressed the wax, the subject was instructed to
stop.
In the next step, after removal from the subject’s mouth, the
anterior portion of the wax wafer was hardened in an ice water bath
followed by flame heating the posterior portions of the wax wafer.
The wax was returned to the mouth and the subject instructed to “bite
and hold” into the hard anterior stop, allowing the posterior teeth to
embed in the soft posterior wax. The posterior wax was cooled with
air from an air/water syringe and removed. After it had cooled, the bite
was checked intra-orally for accuracy.
Saafi Jilani et al. (2018), A Simplified Method of Centric Relation Record. Int J Dent & Oral Heal. 4:6, 77-83

92. Biologic: It may arise due to lack of coordination of opposing muscles. When
the patient is requested to close the jaws in the retruded position, the lack of
synchronization between the protruding and retruding muscles may be caused
by habitual eccentric jaw positions adopted by patients to accommodate to
malocclusion..
Psychological:The more the operator becomes irritated over the apparent lack
of ability of the patient to retrude the mandible.Then dentist must be
prepared to calmly spend adequate time in securing the centric relation
records.
Mechanical: It is essential that the denture bases on which the occlusal rims is
made fit perfectly and do not interfere with each other. Failure of adaptation
of denture base to the tissue surface may result in unevenly distributed
pressure on the underlying resilient tissue leading to discrepancy in jaw
relation recording.

106. REVIEW OF LITERATURE
CLMM Neto et al( 2021) reviwed that , the
bimanual technique was often superior
(generated greater reproducibility of the CR)
or
at least equivalent to the chin point guidance
technique.Therefore, for individuals with
complete dentition and without
temporomandibular disorders, the bimanual
technique is more recommended.

108. 1.Prosthodontic treatment for edentulous patient . Boucher’s,
10th edition
2.Syllabus of complete dentures. Heartwell,3rd edition
3.Dawson- evaluation diagnosis and treatment planning of occlusal
patient
4.Complete denture prosthodontics –John J Sharry 3rd edition
5.Winkler essentials of complete denture 2nd edition
6. Using the term “centric “–William Avant JPD 1971;25 110
7.Mandibular centricity :centric relation-JPD 2000;83 Factors
influencing centric relation record in edentulous mouths JPD 1964;14
8.Critical evaluation of methods to record centric jaw relation –
journal of indian prosthodontic society july 2009
REFERENCES

109. 9.Physiologic vertical dimension and centric
relation –JPD 2004;91
10.Centric relation and condylar
movement:Anatomic mechanism. JPD1971;vol
26:581-590
11.An appraisal of the literature on centric
relation.part 1 ,Part 2, part 3 – journal of oral
rehabilitation 2000;27
12.Centric relation record-Historical review.
JPD1982;vol47:141-144

111. 19. Hunter BD 2nd,Toth RW. Centric relation registration using an anterior
deprogrammer in dentate patients. J Prosthodont. 1999 Mar;8(1):59-61. doi:
10.1111/j.1532-849x.1999.tb00011.x. PMID: 10356558.
20. https://www.thieme-connect.de/products/ejournals/abstract/10.1055/s-
0041-1735903
21. Nidhi Duggal et al. Meta- Analysis ofVarious Methods of Recording Centric
Jaw Relation- A Literature Review
International Journal of Health Sciences & Research (www.ijhsr.org) 342
Vol.7; Issue: 3; March 2017