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NMD THE SCIENCE The History & Evolution of Physiologic Dentistry 2 Perspective tells the story… • We are still an in the infancy of our profession • Our understanding is growing and increasing • True of any evolution in science, the bastions of the current view fight the next evolution • What we ‘know’ now compared to what will be known in 100 or 1000 years is miniscule! • However, a system cannot be understood 3 Bilateral Balanced • An approach to improve fit and function of dentures ~ 1800s • Occlusal scheme where all the posterior teeth are in contact in all excursions • Helped to keep dentures seated • Chewing efficiency was terrible • Tooth centered philosophy 4 Gnathology • An approach to improve fit and function of dentures ~1930s • Tripodization of cusp/fossa relationship • Stewart fully adjustable articulator • ‘If only the cusp/fossa gearing is right, then everything is right’ • Cusp interdigitation drives skeletal support • Improved chewing efficiency but not patient comfort • Tooth centered philosophy 5 Centric Relation • An approach to improve fit and function of dentures ~1950s • Most Posterior-Superior position is occlusal nirvana • Then another almost dozen specific single best places and three dozen correct ways to get there • Today those who teach it say most dentists won’t be able to master it • Thinking is that if the jaw relationship is idealized then we can match the teeth to support that • But… what happens when the condyle is bent – or missing? • Bone centered philosophy 6 Neuromuscular • An approach to improve fit and function of dentures ~ 1970s • Accepts that tooth and bone relationships are critical – but that in the end, muscle comfort reigns • Only approach to look to objective data such as EMGs • Reversible as it starts with orthotic wear to manage symptoms • Deals with all dimensions of space simultaneously • Has significant literature to support therapy • Decompresses joints like all other aspects of health care – rather than compress the bone into the socket • Eliminates grinding/bruxism ~85% of the time 7 Physiologic Neuromuscular • An approach to improve fit and function of patients • Pioneered at LVI, a live patient and hands-on Continuing Education facility • Marries the ‘stomatognathic triad’ of teeth bones and muscles with airway and the rest of the body • Significant improvements in outcomes of care • Manages night-time bite problems (airway) along with daytime bite problems (headaches etc) • Eliminates bruxism ~100% of the time! 8 GROWTH AND DEVELOPMENT • MOST IMP THING O2 • FIRST YEAR GROWTH ADVERSELY AFFECTED WITH • ENVIRONMENT • NO FOSSA WHEN BORN • AFFECTED BY POSITION OF MANDIBLE • THINGS THAT AFFECT FACIAL GROWTH • BREAST FEEDING • ORAL HABITS • ALLERGIES • AIRWAY OBSTRUCTION • DISHARMONY BETWEEN STOMATOGNATHIC FORCES • IN A HEALTHY CHILD T AND A BEGIN TO ATROPHY BY AGE 2 AND GONE BY PUBERTY UNLESS ALLERGIC CHILD THEN THEY ARE HYPERTROPHIED AIRWAY BECOMES KEY • CAVEAT: • WE ALL HAVE THE ABILITY TO EXIST IN ACCOMMODATIVE PATHOLOGIC POSITION • WHEN THE PATHOLOGIC POSITION EXCEEDS OUR ACCOMMODATIVE CAPACITY PT BEGINS TO COMPLAIN EITHER OF PAIN DISCOMFORT OR ESTHETICS • 90% OF PAIN IS DERIVED FROM MUSCLES - Dr Janet Travell • TYPICAL PT • NECK PAIN • CAN’T TURN THE HEAD • CLENCHED OR BRUXED • HEADACHES • DOESN’T CONSIDER THEMSELVES A PAIN PT • CO • CR • PROPRIOCEPTIVELY PEOPLE CHOSE WHERE THEIR TEETH FIT TOGETHER CO=CR • WHAT IS NMD • NM DENTISTRY RESTORES TEETH WHERE THE MUSCLES ARE COMFORTABLE • BECAUSE OF PROPRIOCEPTIVE CONTROL OF MABDIBULAR MOVEMENTS,THEY WILL ALWAYS CLOSE IN THAT COMFORTABLE POSITION • the atachment you will see pre bite change/post bite change/post coronoplasty of the rats. • Cranio. 2005 Apr;23(2):119-29. Links • The influence of an experimentally-induced malocclusion on vertebral alignment in rats: a controlled pilot study. Six Dimensional occlusion • lateral • vertical • ap • pitch • yaw • roll • lets discuss all the sign and symptom sheet • pain in the joints • pain in the ear • pain around the eyes • pain in the jaw • pain in neck • shoulders • Pain in forehead • temples • facial muscles • joint sounds • Subjective hearing loss • Vertigo • ringing in the ears(tinnitus) • HEADACHES • fullness pressure in the ear • Difficulty swallowing • Optimal Rx requires DD of the etiology of Ds process • requires primary or secondary stresses • Descending(primary TMD) • Ascending(sec TMD) • Jaw position affects where cranium sits • Wax picture with condyle • TENS Transcutaneous Electrical Neural Stimulation • Myomonitor=Low frequency TENS • Pumps waste metabolites and lactic acid from hypertonic muscles • Increases vascular flow • increases O2 • ATP • Glucose • Ca++ • TENS changes muscle metabolism from anaerobic (lactic acid) to aerobic ( Krebs) • 8x more effecient • endorphin effect • produces antidromic refraction of the motor nerve • PT 65 • convinced going to die in 6 mnths • severe migraines • lots of medications • never left house for 40 years • would close herself in a room for days • now i have a difficult time getting her in the office • arizona • hawaii • utah • alaska • Pt 39 years old • couldn’t sleep • diagnosed with fibromyalgia • jaw sounds • pain 9 out of 10 • ringing in the ears • Pain almost gone 2 out of 10 • no longer on medication for fibromyalgia • sleep an average of 6-7 hours Forward Head Posture