A VEIW ON TEMPOROMANDIBULAR JOINT,tmj,TEMPOROMANDIBULAR JOINT,anatomy of TEMPOROMANDIBULAR JOINT,pathology of TEMPOROMANDIBULAR JOIN

1. GOOD AFTERNOON

2. A VEIW ON TEMPOROMANDIBULAR JOINT GUIDED BY: DR. R. N. PODDAR, HOD, ORAL & MAXILLOFACIAL SURGERY, DR. R. AHMED DENTAL COLLEGE & HOSPITAL, KOLKATA DR. MANIMAY BANERJEE, ASSOCIATE PROFESSOR, DEPT. OF ORAL & MAXILLOFACIAL SURGERY, RADCH,KOLKATA

4. IT IS DESCRIBED AS A COMPLEX, MULTIAXIAL, SYNOVIAL, BICONDYLAR AND GINGLIMOARTHROIDAL JOINT.

6. TMDs(TEMPOROMANDIBULAR DISORDERS) INCLUDE MYOFACIAL PAIN , INTERNAL DEARRANGEMENT, INFLAMMATION, DILOCATION, ANKYLOSIS, NEOPLASIA ETC.

7. NOTHING IS MORE FUNDAMENTAL TO TREATING PATIENTS THAN KNOWING THE ANATOMY.

9. TEMPOROMANDIBULAR JOINT

12. SHAPE: NORMALLY OVOID. MAY BE FLAT, ROUND AND ANGULAR.

13. POLES: MEDIAL AND LATERAL.

14. MEDIAL IS MORE PROMINENT.

15. DIAMETER: MESIOLATERAL- 13 TO 25 MM ANTERO POSTERIOR- 5.5 TO 16 MM

17. FUNNEL SHAPED

19. CAPSULAR STYLOMANDIBULAR

21. LUBRICATION MECHANISM THE LUBRICATION MECHANISM OF TMJ IS CONTROLLED BY THE SYNOVIAL FLUID, PRESENT IN THE JOINT CAVITY. TWO TYPES OF LUBRICATION IS SEEN MAINLY.

23. MIDDLE MENINGEAL ARTERY FROM ANTERIOR

24. INTERNAL MAXILLARY ARTERY FROM INFERIOR

25. OTHER IMPORTANT ARTERIES ARE- DEEP AURICULAR, ANTERIOR TYMPANIC AND ASCENDING PHARYNGEAL.

29. HORIZOTAL PLANE BORDER AND FUNCTIONAL

31. MOVEMENTS

32. SAGITTAL PLANE BORDER AND FUNTIONAL MOVEMENTS FOUR DISTINCT MOVEMENTS COMPNENTS BELONG TO THIS GROUP. POSTERIIOR OPENING BORDER ANTERIOR OPENING BORDER SUPERIOR CONTACT BORDER FUNCTIONAL

33. Horizontal plane border and functional movements IN THE HORIZONTAL PLANE, A RHOMBOID SHAPED PATTERN IS SEEN THAT HAS FOUR DISTINCT MOVEMENT COMPONENTS WITH A FUNCTIONAL COMPONENT. LEFT LATERAL BORDER COTINUED LEFT LATERAL BORDER WITH PROTRUTION. RIGHT LATERAL BORDER CONTINUED RIGHT LATERAL BORDER WITH PROTRUSION.

34. VERTICAL BORDER AND FUNTIONAL MOVEMENTS WHEN MANDIBULAR MOTION IS VIEWED IN THE FRONTAL PLANE, A SHIELD SHAPED PATTERN CAN BE SEEN; THE COMPONENTS OF IT ARE: LEFT LATERAL SUPERIOR BORDER LEFT LATERAL OPENING BORDER RIGHT LATERAL SUPERIOR BORDER RIGHT LATERAL OPENING BORDER

37. EVALUATION OF TMJ FOR TENDERNESS

38. MEASUREMENT OF RANGE OF JAW MOTION.IN SOME TMDs, JOINT NOISE IS HEARD WHICH CAN BE EASILY DETECTED DURING PALPATION OR WITH THE HELP OF STETHOSCOPE. MOST COMMON JOINT SOUNDS ARE: 1. CLICKING 2. CREPITUS

39. SYSTEMIC EVALUATION OF MUSCLES OF MASTICATION 3. PALPATION OF TEMPORALIS TENDON 1. PALPATION OF MASSETER 2. PALPATION OF TEMPORALIS

40. EVALUATION OF TMJ A. CLOSED MOUTH POSITION B. OPEN MOUTH POSITION

41. MEASUREMENT OF RANGE OF JAW MOTION MAXIMUM VOLUNTARY VERTICAL OPENING (NORMALLY UP TO 45 MM) EVALUATION OF LATERAL EXTRUSIVE MOVEMENT (10 MM APPROX)

42. DIAGNOSTIC AIDS USED TO EVALUATE TMJ

43. MRI CT PANOROGRAPH TOMOGRAM

44. CONCLUSION Nature has blessed us with a marvelously dynamic masticatory system , allowing us to function and therefore exist. Articulatory system is an important part of the masticatory system of our body. So as a dental care provider to treat the patients of TMDs before knowing the pathology, this is essential to know the normal anatomy and physiology of TMJ.

45. Thank you…

46. SPECIAL THANKS TO: DR. NUPUR BANERJEE, DEPT. OF ORAL &MAXILLOFACIAL SURGERY, R.A.D.C.H.,KOL DR. DEBOBRATA MONDAL, DEPT. OF ORAL &MAXILLOFACIAL SURGERY, R.A.D.C.H., KOL MR. ARINDAM MONDAL ALL OF MY TEACHERS, SENIORS, JUNIORS AND BATCHMATES.