A 58-year-old woman noticed that her front teeth had become spaced and seeks advice from her dentist. On entering the surgery, the dentist notices that she has difficulty in walking and does not respond to his questions. She has become increasingly deaf and her vision has also deteriorated. On examination, the maxilla and zygoma are enlarged and there is enlargement of the forehead.
1. What diagnosis would you suspect?
Pagetʼs disease of bone results in enlargement of cranial bones and deformation of weight- bearing bones. The cranium is usually expanded in thickness and symptoms may arise from cranial nerve compression.
2. What information might be gained from oral radiographs and blood tests to support this diagnosis?
Radiographs of the jaws may show hypercementosis, cemental masses, abnormal trabeculation and a cotton-wool appearance in the jaws. The alkaline phosphatase level is markedly raised.
3. What are the principal histological features of this disorder?
Disordered bone remodelling is seen; larger osteoclasts are present and the trabeculae show a scalloped outline. Numerous resting and reversal lines, resulting in a mosaic pattern, are seen and the vasculature may be increased. Globular cementum-like masses are seen in the jaws.
DEFINITION = Functional appliances are defined as ‘loose fitting or passive appliances which harness the natural forces of the orofacial musculature that are transmitted to the teeth and alveolar bone through the medium of appliance’.
- Given by anderson and haul
- Also called as norwegian appliance or loose fitting appliance
- It doesn’t have any clasp to hold onto dentition normally
- Only one wire component = labial bow
Mechanism of action 2m
- Pt has to forcibly hold the appliance in its place aka maxilla as its loose appliance with no clasps
- This causes the pt to bring his mandible forward and keep mouth closed so the activator doesn’t fall down.
- When pt swallows = muscles get stretched, continous remodeling at TMJ and mandible stays in forward direction
- Mandible is staying forward due to a REFLEX – myotatic reflex = due to continuous stretch of muscles, kinetic energy is generated and transferred to maxillary and mandibular dentition and skeletal base. Leading to:
- Distal force on maxilla
- Mesial force in mandible
- Hence, condylar adaptation occurs
- ‘viscoelastic property’ = passive tension caused by stretching of muscles, soft tissue, tendinous tissue, etc. are responsible for the action
- Class II division 1 malocclusion
- Class II division 2 malocclusion
- Class III malocclusion
- Class I open bite malocclusion
- Class I deep bite malocclusion
- As a preliminary treatment before major fixed appliance therapy to improve skeletal jaw relations
- For post treatment retention
- Children with lack of vertical development in lower facial height.
- Adult pt
- Too much proclination of lower anteriors
- Increased lower anterior facial height
- pt can remove it
- oral hygiene is maintained
- no food restrictions
- chair side time is less
Disadvantage = pt compliance
TYPES of activator
- H activator
- Horizontally growing pt
- V activator
- Vertically growing pt
- Take impression
- Bite registration = gives us an idea how much mandible needs to be displaced. U shaped wax is placed on the oral cavity and asked to bring it forward and the bite is also opened posteriorly.
- Wire elements
- Acrylization of appliance
- Trimming = to bring about certain movements of the dentition
- WUNDERER MODIFICATION = Given in class 3
- CYBERNATOR = similar to bionator = activator with reduced palatal acrylic
- Cutout or palate free activator
- Karwetzky modification
- Herren modification
- Elastic open activator
- Kinetor by Stockfish
- Dental caries is defined as a chronic infectious disease which results from the demineralization of the inorganic portion and destruction of the organic portion of the tooth.
- Epidemiology of dental caries can be studied under the following heading: Host, agent and environment All these factors should react over a period of time for dental caries to occur.
- CARIES FORMATION
- Substrate (sugar) + microorganism (s.mutans in plaque) = lactic acid = causing demineralization
- Remineralization = fluoride, calcium, phosphate
- Fl = dentifrice
- Ca and PO4 = teeth and saliva
- HOST FACTORS
- 80% of caries occur on occlusal surfaces
- Lower incisors are the least affected teeth
- Malaligned rotated = bristles cannot reach and clean leading to increased caries
- Dentinogenesis and amelogenesis imperfecta = hypoplastic teeth and pitts = more prone to caries
- Caries is considered to be bilateral
- rich in calcium phosphate and fluoride = decrease in caries
- Rich in carbonate = increase in caries attack
- pH =
- unstimulated pH is slightly acidic
- High flow rate = pH increases
- pH of saliva = main is bicarbonate content
- Sialin, phosphate and ammonia = also determines pH of saliva
- Normal secretion = 700-800 ml/day
- Aplasia of glands and xerostomia = increase in rampant caries
- Mucin responsible for viscous saliva
- Viscosity does not influence caries
- ANTIBACTERIAL PROPERTIES
- Lactoperoxidase = this prevents early microbial colonization of tooth
- Lysozyme = it is a positive enzyme that catalyzed the degradation of negatively charged peptidoglycans matrix of microbial cells
- Lactoferrin = iron binding protein = needed for microbial growth
- IgA = inhibits adherence and thereby prevents colonization on mucosal surfaces and teeth by organisms, facilitating their removal of swallowing
- AGE = 3 peaks for caries development
- 4-8 years = manual dexterity is less
- 11 – 19 years = adolescents
- 55 – 65 years = root caries
- Gender = Reasons
- Early eruption of teeth
- More fondness of sweets
- Hormonal variations
- Morphological differences
- Familial hereditary
- Good or bad teeth seen in the family
- Morphology, occlusion, salivary flow
- Emotional disturbances
- Increase stress = decrease salivary flow = increased caries in oral hygiene is not followed
- Socio-economic status
- Low SES = increases decayed and increased missing
- High SES = increased filling
- Overall low SES = increase dental caries
- Reason = affordability for prevention and treatment
- Caries is considered as disease of poverty
- TIME FACTOR FOR DEVELOPMENT OF CARIES
- Peak susceptibility = 2-4 years after eruption
- Agent factors
- Organisms = S.mutans = pioneer = acidogenic, aciouric, eat/consume sugar
- Extracellular = dextrans and fructans. Responsible for adhesion on tooth
- intracellular polysaccharide = glycogen
- Lactobacilli = secondary organisms, when caries have reached dentin. It kills all S.Mutans creates an environment of very low pH
- Veillonella = anti caries organism = consumes acid as food = produced by S.Mutans for demineralization
DIET OF DENTAL CARIES
- Diet = it is defined as type and amount of food eaten daily by an individual
- Nutrition = defined as seen of the processes by which an individual takes in and utilizes food
- Organic compound containing carbon, hydrogen and oxygen
- Physical nature of diet = form, clearance, time, retention, oral hygiene
- Frequency of carbohydrate diet
- Monosaccharides = glucose, galactose, fructose
- Disaccharides = sucrose [ glucose+fructose]
- Polysaccharides = starch, glycogen
- Polyols of alcohol = xylitol, mannitol and sorbitol
Classification of sugars
- Intrinsic sugar
- Sugar molecules inside the cell
- Fruit and vegetable
- Extrinsic sugar
- Sugar molecules outsides the cell
- Milk sugar = found in dairy products = lactose
- Non milk sugar = honey, fruit juices, table sugar = responsible for the caries
I have a little garden of affection, where I feel affection for anyone who steps into that garden. I will be loyal to them, help them if they need it, devote time and attention to them. This garden is (mostly) unconditional; it does not decide who within it gets its fruits, or if they’re worthy enough to eat; the only requirement is to be in the garden.
But my garden has the gatekeeper, who decides who to let into the garden. I might see someone who doesn’t have their shit together, who needs a lot of emotional labor, who might cause me a lot of pain, who I will struggle to understand, and know that I could love and care for them.
The question is not if I have a garden that would accept them, but rather if I want to let them into my garden. My gatekeeper is cold and brutal. It checks how many resources my garden has, how many people are in there already, how sustainable it is. It evaluates potential entries on concrete facts – how emotionally mature are they, how intelligent? How much power do they have? Are they socially strategic to be associated with? Will they increase your garden capacity to hold others in the future?
And so, right now my choices around who new to allow into my garden is associated mainly with an unflattering calculating strategy. My life is a chess game, and these players are the potential pieces.
This is particularly true with my life right now; I’m looking at potential mates as strategic moves. Really I suspect this is what I was doing all along, and likely what many other people are doing, it was just much more subconscious before.
But the gatekeeper itself is not allowed in the garden; once in the garden, the newcomers are free from evaluation. If they drop in power, if they stop helping me, if they start absorbing way more emotional energy, then in my garden they remain; doused in affection and unconditionally accepted.
My garden carries many powerless people from earlier places in my life, or from high-proximity adventures, or people who came in attached to someone else who my gatekeeper wanted more. I am not evaluating them, my love for them is not dependent on what they can offer me; they simply reside in my heart. I have no regrets about this and it’s not an issue for me that my gatekeeper might continue to reject people similar to them.
(also to be clear, the garden analogy isn’t perfect and I’m oversimplifying; people don’t always stay in my garden forever, it’s not exactly binary if you’re in/out of the garden, there are different garden levels, and I don’t think literally everybody would be automatically and unconditionally drowned in affection once they got past the gatekeeper)
Reference dental pulse edition 14
Reference dental pulse edition 14
Reference dental pulse edition 14
Reference dental pulse edition 14