The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
4. Centric relation record
DEFINITION [according to GPT-7]:Centric relation record is a registration of the
relationship of the maxilla to the mandible
when the mandible is in centric relation.
The registration may be obtained either
intraorally or extra orally.
www.indiandentalacademy.com
5. DEFINITION: THE MAXILLO MANDIBULAR
RELATIONSHIP IN WHICH CONDYLES ARTICULATE
WITH THE THINNEST AVASCULAR PORTION OF
THEIR RESPECTIVE DISCS WITH THE COMPLEX IN
THE ANTERO-SUPERIOR POSITION AGIANST THE
SLOPES OF ARTICULAR EMINENCES.THIS POSITION
IS INDEPENDENT OF TOOTH CONTACT.THIS
POSITION IS CLINICALLY DESCERNABLE WHEN
MANDIBLE IS DIRECTED SUPERIORLY AND
ANTERIORLY.IT IS RESTRICTED TO PURELY
ROTATORY MOVEMENT ABOUT THE TRANSVERSE
HORIZONTAL AXIS.
www.indiandentalacademy.com
6. METHODS OF RECORDING:
METHODS OF RECORDING CENTRIC RELATION
DEPEND ON THE CHOICE OF THE OPERATOR,DEGREE
OF CO-OPERATION OF THE PATIENT AND
EXPERIENCE OF OPERATOR. THEY ARE BROADLY
CLASSIFIED INTO 4 CATEGORIES, NAMELY :
DIRECT CHEEK BITE RECORDINGS
GRAPHIC RECORDINGS
FUNCTIONAL RECORDINGS
CEPHELOMETRICS
www.indiandentalacademy.com
7. DIRECT CHECK BITE RECORDINGS:
DIFFERENT ACADEMICS ADVOCATED DIFFERENT TECHNIQUES
TO RECORD CENTRIC RELATION.BASICALLY THERE ARE TWO
MAIN CONCEPTS,NAMELY :
ZERO PRESSURE PHILOSOPHY ADVOCATED BY
HANAU,WRIGHT AND OTHERS.
MINIMUM PRESSURE PHILOSOPHY BY PAYNE , TROPPOZONO,
SCHYLER AND OTHERS
www.indiandentalacademy.com
8. Techniques for centric relation
record.
► Active centric relation record
► Passive centric relation record
1.Chin point technique.
2.Dawson’s bimanual manipulation.
3.Tongue to palate technique.
www.indiandentalacademy.com
9. Chin point guidance
[one handed technique]
► By Anderson and Tanner
► Posteriorly directed force is gently directed
against the chin.
www.indiandentalacademy.com
14. FUNCTIONAL RECORDINGS
THESE TECHNIQUES UTILIZE THE FUNCTIONALLY
GENERATED PATHWAYS TO RECORD THE CENTRIC
RELATION IN PATIENTS. NEEDLES , PATTERSON AND
MAYERS MAINLY ADVOCATED THIS METHOD . BOOS
(1959) USED GNATHODYNAMOMETERTO REGISTER
THE MAXIMUM INTERCUSPATION POSITION.
www.indiandentalacademy.com
15. Problems encountered
BASICALLY THERE ARE 3 TYPES OF DIFFICULTIES IN
RECORDING CENTRIC RELATION.
BIOLOGIC DIFFICULTIES
PSYCHOLOGIC DIFFICULTIES
MECHANICAL DIFFICULTIES
www.indiandentalacademy.com
16. METHOD:
THIS ARTICLE DESCRIBES A SIMPLE
PROCEDURE THAT HELPS PATIENTS TO PUT
THE TIP OF THE TONGUE IN MOST POSTERIOR
POSITION IN MOUTH TO RETRUDE THE
MANDIBLE TO ITS CENTRIC RELATION
POSITION.
www.indiandentalacademy.com
17. PROCEDURE:
1. A STRIP OF RECTANGULAR SHAPED
BASEPLATE WAX( 50 mm LENGTH AND 70mm
WIDTH) IS ADAPTED TO THE PALATAL
SURFACE OF MAXILLARY RECORD BASE AT
THE MID LINE.
2. FOUR CIRCULAR HOLES ARE MADE ALONG
THE WAX STRIP MITH THE DIAMETER OF 10
mm.
3. PATIENT IS SHOWN HOW TO PLACE TONGUE
www.indiandentalacademy.com
INTO HOLES.
19. 1. AFTER RECORD BASE IS PLACED AND STABILISED
PATIENT IS ASKE TO PRACTICE THE POSITIONING OF
TONGUE.
2. PATIENT IS ASKED TO KEEP HIS TONGUE AS
POSTERIOR AS POSSIBLE.
3. TO ASSIST THE PATIENT TO PUT THE TIP OF THE
TONGUE IN DESIRE POSITION, PATIENT IS INSTRUCTED
TO KEEP TONGUE FIRST INTO ANTERIOR HOLE, THEN
SECOND AND GO ON TILL IT REACHES DESIRED
POSITION.
4. WHEN PATIENT IS ABLE TO REPEAT THE POSITION
CENTRIC RELATION RECORD IS MADE
www.indiandentalacademy.com
21. REFERENCES:
1. RAHN AO,HEARTWELL CM. TEXT BOOK OF
COMPLETE DENTURES.
2. HICKEY,ZARB,BOULENDER. BOUCHERS
PROSTHODONTIC TREATMENT FOR COMPLETE
DENTURES.
3. WINKLER S. ESSENTIALS OF COMPLETE
DENTURE PROSTHODONTICS.
4. CENTRIC RELATION RECORDS, HISTORICAL
REVIEW. JPD 1982; 47: 141-5.
5. FACTORS INFLUENCING CENTRIC RELATION
RECORDS IN EDENTULOUS PATIENTS. JPD
1964;14: 1054-65.
6. AN EVALUATION OF CENTRIC RELATION
RECORDS OBTAINED BY VARIOUS TECHNIQUES.
www.indiandentalacademy.com
JPD 1957; 7:770-86.
USE OF TONGUE FOR RECORDING CENTRIC RELATION FOR EDENTULOUS PATIENTS
Magid Bissasu JPD 1999,VOL 82 : 369-70
INTRODUCTION
RECORDING THE EXACT CENTRIC RELATION IS A NIGHTMARE FOR ANY STUDENT GIVEN THE COMPLICATIONS INVOLVED WITH ITS INACCURACY .ACCURATE RECORDING OF CENTRIC RELATION NEEDS TECHNIQUE ,TACT AND PATIENCE ON PART OF THE OPERATOR AND A LIITTLE BIT OF CO-OPERATION FROM THE PATIENT.
DEFINITION: THE MAXILLO MANDIBULAR RELATIONSHIP IN WHICH CONDYLES ARTICULATE WITH THE HTINNEST AVASCULAR PORTION OF THEIR RESPECTIVE DISCSWITH THE COMPLEX IN THE ANTERO-SUPERIOR POSITIONAGIANST THE SLOPES OF ARTICULAR EMINENCES.
METHODS OF RECORDING CENTRIC RELATION DEPEND ON THE CHOICE OF THE OPERATOR,DEGREE OF CO-OPERATION OF THE PATIENT AND EXPERIENCE OF OPERATOR. THEY ARE BROADLY CLASSIFIED INTO 4 CATEGORIES, NAMELY :
DIRECT CHEEK BITE RECORDINGS
GRAPHIC RECORDINGS
FUNCTIONAL RECORDINGS
CEPHELOMETRICS
DIRECT CHEEK BITE RECORDINGS:
DIFFERENT ACADEMICS ADVOCATED DIFFERENT TECHNIQUES TO RECORD CENTRIC RELATION.BASICALLY THERE ARE TWO MAIN CONCEPTS,NAMELY :
ZERO PRESSURE PHILOSOPHY ADVOCATED BY HANAU,WRIGHT AND OTHERS.
MINIMUM PRESSURE PHILOSOPHY BY PAYNE , TROPPOZONO, SCHYLER AND OTHERS
GRAPHIC RECORDINGS:
THESE INCLUDE : INTRA ORAL TRACING
EXTRA ORAL TRACING
FUNCTIONAL RECORDINGS
THESE TECHNIQUES UTILIZE THE FUNCTIONALLY GENERATED PATHWAYS TO RECORD THE CENTRIC RELATION IN PATIENTS. NEEDLES , PATTERSON AND MAYERS MAINLY ADVOCATED THIS METHOD . BOOS (1959) USED GNATHODYNAMOMETERTO REGISTER THE MAXIMUM INTERCUSPATION POSITION.
Problems encountered
BASICALLY THERE ARE 3 TYPES OF DIFFICULTIES IN RECORDING CENTRIC RELATION.
BIOLOGIC DIFFICULTIES
PSYCHOLOGIC DIFFICULTIES
MECHANICAL DIFFICULTIES
METHOD:
THIS ARTICLE DESCRIBES A SIMPLE PROCEDURE THAT HELPS PATIENTS TO PUT THE TIP OF THE TONGUE IN MOST POSTERIOR POSITION IN MOUTH TO RETRUDE THE MANDIBLE TO ITS CENTRIC RELATION POSITION.
PROCEDURE:
A STRIP OF RECTANGULAR SHAPED BASEPLATE WAX( 50 mm LENGTH AND 70mm WIDTH) IS ADAPTED TO THE PALATAL SURFACE OF MAXILLARY RECORD BASE AT THE MID LINE.
FOUR CIRCULAR HOLES ARE MADE ALONG THE WAX STRIP MITH THE DIAMETER OF 10 mm.
PATIENT IS SHOWN HOW TO PLACE TONGUE INTO HOLES.
AFTER RECORD BASE IS PLACED AND STABILISED PATIENT IS ASKE TO PRACTICE THE POSITIONING OF TONGUE.
PATIENT IS ASKED TO KEEP HIS TONGUE AS POSTERIOR AS POSSIBLE.
TO ASSIST THE PATIENT TO PUT THE TIP OF THE TONGUE IN DESIRE POSITION, PATIENT IS INSTRUCTED TO KEEP TONGUE FIRST INTO ANTERIOR HOLE, HHEN SECOND AND GO ON TILL IT REACHES DESIRED POSITION.
WHEN PATIENT IS ABLE TO REPEAT THE POSITION CENTRIC RELATION RECORD IS MADE.
CONCLUSION
REFERENCES:
RAHN AO,HEARTWELL CM. TEXT BOOK OF COMPLETE DENTURES.
HICKEY,ZARB,BOULENDER. BOUCHERS PROSTHODONTIC TREATMENT FOR COMPLETE DENTURES.
WINKLER S. ESSENTIALS OF COMPLETE DENTURE PROSTHODONTICS.
CENTRIC RELATION RECORDS, HISTORICAL REVIEW. JPD 1982; 47: 141-5
FACTORS INFLUENCING CENTRIC RELATION RECORDS IN EDENTULOUS PATIENTS. JPD 1964;14: 1054-65.
AN EVALUATION OF CENTRIC RELATION RECORDS OBTAINED BY VARIOUS TECHNIQUES. JPD 1957; 7:770-86.