The document discusses dental articulators, which are mechanical instruments that simulate jaw movement. It describes the key determinants of mandibular movement, including intercondylar distance, angle of articular eminence, immediate side shift, progressive side shift, and incisal guidance. These determinants vary between patients and affect occlusal relationships. The document outlines the parts of articulators that simulate jaw anatomy and how they allow adjustment of determinants. It also classifies articulators based on their capabilities and adjustability.
I will discuss various reference points for face bow.....
Thanks for watching......
If you like to watch my youtube channel..
please click for my channel....... Dr Aaryas Vlogs
https://youtu.be/myAENzQlHjE
I will discuss various reference points for face bow.....
Thanks for watching......
If you like to watch my youtube channel..
please click for my channel....... Dr Aaryas Vlogs
https://youtu.be/myAENzQlHjE
In prosthodontics, replacing the missing, without affecting the other components of the masticatory system has two main reference the maximum intercupation and the centric relation.
In this lecture discussion of centric relation as reference is exposed.
A prosthetic technique for periodontal healthy teeth using feather edge preparation
in a flapless approach in both esthetic and posterior areas with ceramo-metal and zirconia restorations,
achieving high quality clinical and esthetic results in terms of soft tissue stability at the prosthetic/tissue interface, both in the short and in the long term.
In prosthodontics, replacing the missing, without affecting the other components of the masticatory system has two main reference the maximum intercupation and the centric relation.
In this lecture discussion of centric relation as reference is exposed.
A prosthetic technique for periodontal healthy teeth using feather edge preparation
in a flapless approach in both esthetic and posterior areas with ceramo-metal and zirconia restorations,
achieving high quality clinical and esthetic results in terms of soft tissue stability at the prosthetic/tissue interface, both in the short and in the long term.
Growth rotations /certified fixed orthodontic courses by Indian dental aca...Indian dental academy
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.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
Mean Value Articulator Classification
Classification According to Adjustability of Articulators:
Nonadjustable Articulators:
Semiadjustable Articulators:
This presentation goes through various articles and books based on Articulators and gives a brief of the types of articulators used in dentistry from the classical ones to recent advances ones.
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.for more details please visit
www.indiandentalacademy.com
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
Follow us on: Pinterest
Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
HOT NEW PRODUCT! BIG SALES FAST SHIPPING NOW FROM CHINA!! EU KU DB BK substit...GL Anaacs
Contact us if you are interested:
Email / Skype : kefaya1771@gmail.com
Threema: PXHY5PDH
New BATCH Ku !!! MUCH IN DEMAND FAST SALE EVERY BATCH HAPPY GOOD EFFECT BIG BATCH !
Contact me on Threema or skype to start big business!!
Hot-sale products:
NEW HOT EUTYLONE WHITE CRYSTAL!!
5cl-adba precursor (semi finished )
5cl-adba raw materials
ADBB precursor (semi finished )
ADBB raw materials
APVP powder
5fadb/4f-adb
Jwh018 / Jwh210
Eutylone crystal
Protonitazene (hydrochloride) CAS: 119276-01-6
Flubrotizolam CAS: 57801-95-3
Metonitazene CAS: 14680-51-4
Payment terms: Western Union,MoneyGram,Bitcoin or USDT.
Deliver Time: Usually 7-15days
Shipping method: FedEx, TNT, DHL,UPS etc.Our deliveries are 100% safe, fast, reliable and discreet.
Samples will be sent for your evaluation!If you are interested in, please contact me, let's talk details.
We specializes in exporting high quality Research chemical, medical intermediate, Pharmaceutical chemicals and so on. Products are exported to USA, Canada, France, Korea, Japan,Russia, Southeast Asia and other countries.
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
2. TO EVALUATE OCCLUSAL RELATIONSHIPS
CASTS HAVE TO BE ARTICULATED
• Some casts can be hand held in maximum intercuspation
3. TO EVALUATE OCCLUSAL RELATIONSHIPS
CASTS HAVE TO BE ARTICULATED
• Some casts have to be held in position mechanically
• In some cases we want to simulate mandibular
positions and movements more accurately than hand
articulating can accomplish
4. MOUNTED CASTS ARE A SIGNIFICANT
DIAGNOSTIC AID IN EVALUATING AND
PLANNING OCCLUSAL RELATIONSHIPS
5. NOT ONLY ARE ARTICULATORS OF DIAGNOSTIC
IMPORTANCE, THEY ARE NECESSARY TO CARRY
OUT TREATMENT PROCEDURES AS WELL
• Supporting the working casts to fabricate restorations
and simulating mandibular movement
6.
7. ARTICULATOR:
• A mechanical instrument that represents
the temporomandibular joints and jaws, to
which maxillary and mandibular casts may
be attached to simulate some or all
mandibular movements. – GPT - 8
8. TO UNDERSTAND THE ARTICULATOR,
WE NEED:
• An understanding of the specific
determinants of mandibular movements
* These factors will vary from patient to
patient which will result in different
patterns of movement
* Articulators are designed to have
these factors either fixed or
adjustable to simulate the mandibular
movement of each of our patients
• What the parts of the articulator simulate
anatomically and how they function
• Classification and capabilities
• How do we manipulate and adjust
9. DETERMINANTS OF MANDIBULAR
MOVEMENT
• Right TMJ
posterior determinants
• Left TMJ
• Incisal guidance or occlusion – anterior determinant -
programs the fourth determinant
• Neuromuscular response
Guichet
10. POSTERIOR DETERMINANTS OF
MANDIBULAR MOVEMENT
• Intercondylar distance
• Angle of articular eminence
• Immediate side shift
• Progressive side shift
• Bennett movement - forward/backward
• Bennett movement - up/down
ANTERIOR DETERMINANT OF
MANDIBLAR MOVEMENT
• Incisal guidance or occlusion – programs
the fourth determinant
11. INTERCONDYLAR DISTANCE
• The distance between the rotational centers
of two condyles or their analogues – GPT-8
• Distance between the vertical axes (in mm)
• ICD
ICD
14. IMMEDIATE SIDE SHIFT (MLR)
• Measured in mm or tenths of mm from the
centric position of the condyle
ISS
15. PROGRESSIVE SIDE SHIFT (MLT)
• Measured in degrees from a sagittal plane
passing through the centric position of the
condyle or the termination of the immediate,
early, or distributed M.L.T. if present –
usually 6-8 degrees
16. BENNETT MOVEMENT ON WORKING
SIDE – BACKWARD OR FORWARD
• Measured in degrees from the frontal plane
17. BENNETT MOVEMENT ON WORKING
SIDE – UP OR DOWN
• Measured in degrees from the horizontal plane
19. HOW DO THESE FACTORS EFFECT
THE OCCLUSAL SURFACES OF
RESTORATIONS
• Intercondylar distance
• Angle of articular eminence
• Immediate side shift
• Progressive side shift
• Bennett movement - forward/backward
• Bennett movement - up/down
• Incisal guidance
20. INTERCONDYLAR DISTANCE EFFECTS
The path the lower teeth follow during lateral
11movement
The direction of the grooves on the posterior
11teeth
21. INCISAL GUIDANCE OF 30˚; ANGLE OF ARTICULAR
EMINENCE OF 30˚ - MANDIBLE WILL FOLLOW A
30˚PATH IN A PROTRUSIVE MOVEMENT
Cusp height has to be less than 30˚or will have an
interference
30˚
45˚
23. THE LAST PATIENT HAD AN INCISAL
GUIDANCE OF 30˚ AND AN ANGLE OF
ARTICULAR EMINENCE OF 30˚
24. ANOTHER PATIENT MAY HAVE AN INCISAL
GUIDANCE OF 30˚ AND AN ANGLE OF
ARTICULAR EMINENCE OF 60˚
This patient can have longer cusps
because the mandible will separate more
posteriorly due to the steeper eminence
45˚
26. NOW LET’S LOOK AT ANOTHER PATIENT WHO
MAY HAVE AN INCISAL GUIDANCE OF 60˚ AND
AN ANGLE OF ARTICULAR EMINENCE OF 60˚
Cusps of the posterior teeth may be as
steep as 59˚ and still disclude because the
mandible is following a 60˚ path
60˚
28. DETERMINANTS OF MANDIBULAR
MOVEMENT
• Intercondylar distance
• Angle of articular eminence
• Immediate side shift
• Progressive side shift
• Bennett movement - forward/backward
• Bennett movement - up/down
• Incisal guidance
The other determinants and more specific effect on
the occlusal surfaces will be discussed later in the
course
29. What is important about these
factors:
• These factors will vary from patient to
patient and effect occlusal surfaces of the
teeth
• Articulators are designed to have these
factors either fixed or adjustable to
simulate the mandibular movement of
each of our patients
30. TO UNDERSTAND THE ARTICULATORS,
NEED:
• An understanding of the specific
determinants of mandibular movements
* These factors will vary from patient to
patient which will result in different
patterns of movement
* Articulators are designed to have
these factors either fixed or
adjustable to simulate the mandibular
movement of each of our patients
• What are the parts of the articulator and
what do they simulate anatomically
• Classification and capabilities
• How do we manipulate and adjust
31.
32.
33. • Medio-lateral position of the maxillary arch
• Medio-lateral cant of the maxillary arch
Maxillary cast positioned to articulator by
means of the face bow which transfers
the
34. • Anterior – posterior position of the maxillary arch
• Medio-lateral position of the maxillary arch
• Cant of the maxillary arch in relation to the sagittal
plane
Maxillary cast positioned to articulator by
means of the face bow which transfers the
35. • Anterior – posterior position of the maxillary arch
• Anterior – posterior cant of the maxillary arch or the
fossa occlusal plane angle (FOP angle)
Maxillary cast positioned to articulator by
means of the face bow which transfers
the
or the Balkwill Angle
36. Balkwill Angle : the angle formed by the Bonwill
triangle and the Balkwill triangle or the plane of occlusion –
incisors 35 mm below condyles and angle of 26°
Bonwill triangle: a 4 inch equilateral triangle
bounded by lines connecting the contacts of the
mandibular central incisor’s incisal edge to each condyle
and from one condyle to the other
35mm
26°
39. FOSSA – FOSSA ELEMENT
• Condyles articulate with the fossa elements
on articulator similar to how the condyles
articulate with the fossae in the skull –
except on the articulator condyles touch all
three walls
40. TOP WALL
• On articulator simulates and functions as
the articular eminemce
• Referred to as the condylar guide
• Can be adjusted for different angles
41. Condyles move in a similar manner on
the articulator as they do in the skull
• Protrusive or balancing movement, the
condyle moves down and forward
42. BACK WALL
• Looks like the back wall of the fossa, but
retrodiscal tissue is between back wall
and condyle in patient
• On articulator functions as a mechanical
stop for the condyle
43. MEDIAL WALL
• Balancing side medial wall a factor in
determining the amount of M.L.T. or side
shift
CR Left Lateral
44.
45. DETERMINANTS OF MANDIBULAR
MOVEMENT
• Intercondylar distance
• Angle of articular eminence
• Immediate side shift
• Progressive side shift
• Bennett movement - forward/backward
• Bennett movement - up/down
• Incisal guidance
63. BENNETT MOVEMENT ON WORKING SIDE – BACKWARD OR FORWARD – ON
ARTICULATOR DETEMINED BY ANGLE OF BACK WALL ON WORKING SIDE
64. BENNETT MOVEMENT ON WORKING SIDE – UP OR DOWN – ON
ARTICULATOR DETEMINED BY ANGLE OF TOP WALL ON WORKING SIDE
• Downward,
more separation
• Upward, less
separation
65. TO UNDERSTAND THE ARTICULATORS,
NEED:
• An understanding of the specific
determinants of mandibular movements
* These factors will vary from patient to
patient which will result in different
patterns of movement
* Articulators are designed to have
these factors either fixed or
adjustable to simulate the mandibular
movement of each of our patients
• What are the parts of the articulator and
what do they simulate anatomically
• Classification and capabilities
• How do we manipulate and adjust
66. CLASSIFICATION OF ARTICULATORS BY:
• Location of condylar guides
Arcon – condylar guides are located on the
maxillary or upper member of the articulator
Nonarcon (condylar articulator) – condylar guides
are located on the mandibular or lower member of
the articulator
• Capabilities
Hinge
Fixed determinant
Semi-adjustable
Fully adjustable
67. Nonarcon
Arcon
Condylar guide remains a
constant angle to upper
member of articulator as
lower member opens and
closes
Condylar guide changes
its angulation as lower
member of articulator
opens and closes
68. TWO ALWAYS RULES – RULE ONE
• Always check to see that the fossae elements are
tight against the upper member of the articulator.
• Always keep the balancing side condyle against it’s
medial and top walls and the working side condyle
against it’s back and top walls when executing a
lateral movement.
balancing side condyle
medial and top walls
working side condyle
back and top walls
69. RULE TWO
• There should be no “play” between the
upper and lower members of the
articulator
• The lower member should travel back so
the condyles meet their respective back,
top, and medial walls with no pressure
being applied
70. CLASSIFICATION BY CAPABILITIES
• Hinge – only capable of opening and closing movements,
not capable of lateral or protrusive movements (Class I)
• Fixed determinant – (average value) capable of opening
and closing, lateral, and protrusive movements. All
determinants are set to average or mean values and not
adjustable. (Class II)
• Semi-adjustable – capable of opening and closing, lateral,
and protrusive movements. Some of the determinants can
be adjusted. (Class III)
• Fully adjustable – capable of opening and closing, lateral,
and protrusive movements. All determinants are
adjustable. (Class IV)
71. CLASSIFICATION: GPT- 9
• Articulator: a mechanical instrument that represents the
temporomandibular joints and jaws, to which maxillary
and mandibular casts may be attached to simulate some or all
mandibular movements; Editorial note for usage: articulators are
divisible into four classes;
• Class I articulator: a simple holding instrument capable of
accepting a single static registration; vertical motion is possible;
syn, NONADJUSTABLE ARTICULATOR
• Class II articulator: an instrument that permits horizontal as well
as vertical motion but does not orient the motion to the
temporomandibular joints
• Class III articulator: an instrument that simulates condylar
pathways by using averages or mechanical equivalents for all or
part of the motion; these instruments allow for orientation of the
casts relative to the joints and may be arcon or nonarcon
instruments; syn, SEMIADJUSTABLE ARTICULATOR
• Class IV articulator: an instrument that will accept 3D dynamic
registrations; these instruments allow for orientation of the casts
to the temporomandibular joints and simulation of mandibular
movements; syn, FULLY ADJUSTABLE ARTICULATOR, FULLY
ADJUSTABLE GNATHOLOGIC ARTICULATOR
75. HISTORICAL ARTICULATORS
• Snow: 1910; first face bow
• Fixed determinant or semi-adjustable?
• What is adjustable? Condylar guide
• Arcon or nonarcon?
76. HISTORICAL ARTICULATORS
• Snow: 1910; first face bow
• Fixed determinant or semi-adjustable?
• What is adjustable? Condylar guide
• Arcon or nonarcon?
77. YOU HAVE RECEIVED:
• Whip mix - 1964 – semi adjustable
• Adjustable condylar guide and progressive side
shift
• All other determinants are fixed
78. DIFFERENT FOSSAE ARE AVALABLE
WHICH HAVE:
• A fixed progressive side shift of 6-8˚
• An adjustable immediate side shift
80. TWO ALWAYS RULES – RULE ONE
• Always check to see that the fossae elements are
tight against the upper member of the articulator.
• Always keep the balancing side condyle against it’s
medial and top walls and the working side condyle
against it’s back and top walls when executing a
lateral movement.
balancing side condyle
medial and top walls
working side condyle
back and top walls
81. RULE TWO
• There should be no “play” between the
upper and lower members of the
articulator
• The lower member should travel back so
the condyles meet their respective back,
top, and medial walls with no pressure
being applied
How to mount 30 degree into something different – you ask patient to move to edge to edge and take biere record in case of class 2, im not sure what you do. Dr Sandra expaliend. Missed.
Protrusive records – condyle forward. Minimum of 5mm . Class II – not going to come to edge to edge. First move 5mm, open, bite reg, and close.
Deprogrammers – CR, seated all the way back.
First horizontal translation that occurs – condyle, begins laterotrusive movement. Few mm. why important? How wide central groove should be. Cusp will ride on central groove. Premature include. Groove 1mm is too narrow compare to ISS 4mm, encouture incline of cusp, going UP, not hortizontal. Prematuring contacting incline vs what condyle wants to do.
Set at 15 degrees. Happens right after imeediate side shift. Side shift becase net net result horizontal dispolacement. Diagonal way. Proportional to protrusive movement of mandible when do you laterotrusive. PSS determinats bennett angel. Beneett angle tells you incline angle of cusp. More side ways more angle. Freedom of short cuspt, central grooves shaped mesially.
Bennett angle – what shappening on working side.
diffent from progressive side shit. Non working condyle leaving the fossa, working is rotating mostly.
On left – rotation mostly. On right – rotation nd movement.
Depends on how much room on the top wall of condyle.
Pallatogram. – speech impression on palate.
If it is wider- what happends to the condyle – red to red to blue, more horitonzal, more mesial,. Grove and oblique goes more mesial.
Red is more perpendicular to vertical line. Perpendicular to groove is escape path. !
Red is steeptest beneet angle. ! Shorter the condyle distance intercondyle distance, the steeper it is. Bigger benett angel to blue.
Maximum is 30 degree – or it will have an intereference. Set up to be balanced. In a denture patient. Condylr guidance was 20 degree in articulator in protrusive, can you tweak, a litte”? Flatter or steeper? Flatter, why? Set up on articulator, on flatter angle, pt has a steeper condyle guidance angle, if cups height is 20 and condyle is 30, disclusion.
Hannaw fomular – condylar guiadance angel, divide 8, plus 12 is beneet angle.
Setting maxillar cast , by facebow, hingle axis transfer of maxillar position.