牙醫師討論區﹝參﹞
Discuss Area For Dentists : 3
         
This area is open to the dentists, dental students, and even the public (if you are intrested). Some of these are from journal papers, some from textbooks, the others are my personal
opinions. So there might be some disagreement or errors (I
mean, my personal opinions). Your opinions or your personal experience will be greatly appreciated. You can E-Mail me at the address: (hnchiu@ms14.hinet.net). Thank you!
    
CONTENTS
Topic One:  Why Replace a Missing Back Tooth?
Topic Two:  The Step by Step Procedures of Oral Cancer Examination
Topic Three:  Clinic Procedures of CI V Composite Filling Tooth #5
Topic Four:  Clinic Procedures of CI IV Composite Filling Tooth #8
Topic Five:  Clinic Procedures of CI IV Composite Filling Tooth #8
Topic Six:  Prophylactic Antibiotics
Topic Seven:  Procedure of Cl II Amalgam filling of tooth #30
Topic Eight:  Why Do We Need Root Canal Therapy?
Topic Nine:  Is It Safe To Use Silver Amalgam In Dental Therapy?
Topic Ten:  Dentin hypersensitivity
Topic Eleven:  OS Terminology
Topic Twelve:  How Do You Brush Your Teeth
Topic Thirteen:  Journel Paper  From: JADA - 1994 - 9
Topic Fourteen:  About Dental X Ray
Topic Fifteen:  Treatment Plan Presentation
Topic Sixteen:  Tooth Preparation: Principles and Common Errors
Topic Seventeen: The relative infective route of periapical diseases
Topic Eighteen: The D. D. of Granuloma & Cyst
Topic Nineteen: Pain
Topic Twenty: CPR Ready Reference
   
Topic Eleven: OS Terminology
 
Q:What do "Sepsis - Asepsis", "Antiseptic - Disinfectant","Sterility - Sterilization"
 and "Sanitization" mean ?
A: 1). "Contemporary Oral and Maxillofacial Surgery" - by Peterson et.al.
  1. Sepsis: the breakdown of living tissue by the action of microorganism and
   is usually accompanied by inflammation. Thus the mere presence of
   microorganisms, such as in bacteremia, does not constitute a septic state.
  2. Asepsis: refers to the avoidance of sepsis.
  3. Antiseptic and Disinfectant: substance that can prevent the multiplication
   of organism capable of producing sepsis. The difference is that antiseptics
   are applied to living tissue, whereas disinfectants are used on inanimate
   objects.
  4. Sterility: the freedom from viable microorganisms. It represents an
   absolute state, there are no degree of sterility.
  5. Sanitization: the reduction of the number of viable microorganisms to safe
   level as judged by public health standards.
 2). "Minor Oral Surgery" - by Geoffrey L Howe.
  1. Sterilization: the removal of all microorganisms from a given object or
   their effective destruction.
  2. Disinfection: the destruction of pathogenic microorganisms in the
   non-sporing or vegetative state.
  3. Sterilization rather than disinfection is mandatory wherever tissue is
   penetrated or there is contact with blood or serum.
 3). "Oral and Maxillofacial Surgery" - by Daniel M. Laskin.
  1. Antiseptic: a chemical that is applied to living tissue such as skin or
   mucous membrane to reduce the number of microorganisms present
   through inhibition of their activity or destruction.
  2. Disinfectant: a chemical used on nonvital objects to kill surface vegetative
   pathogenic organisms, but not necessarily spore forms or viruses.
  3. Sterilization: a process by which all microbial forms are destroyed.
 4). Example - "Periodontal instrumentation" - Infection control - page 2 - by
  Pattison..
  1. Sterilization of instrument.
  2. Disinfection and sanitization of the dental unit.
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Topic Twelve: How Do You Brush Your Teeth

I understand that you know how to brush your teeth. But if you don't mind, I
 would like to introduce one better and efficient way to brush your teeth. This
 method is called "The Bass Method (Sulcus Cleansing)".
Maxillary teeth: Facial and facioproximal surface.
 Place the head of a soft-to-medium brush parallel with the occlusal plane with
 the "tip" of the brush distal to the last molar. Place the bristles at the gingival
 margins, establish an apical angle of 45o to the long axis of the teeth, exert
 gentle vibratory pressure in the long axisof the bristles, and force the bristle
 ends into the facial gingival sulci as well as into the interproximal embrasures.
 This should produce perceptible blanching of the gingiva. Activate the brush
 with a short back-and-forth motion without dislodging the tips of the bristles
 (massage the gingival tissue) . Complete 20 same strokes in the same
 position.Then lift the brush, move it anteriorly, and repeat the process in the
 premolar and canine area. And then continue on the anterior teeth. Continue
 on the opposite side of the arch, section by section, covering three teeth at a
 time, until the whole maxillary dentition is completed.
Maxillary teeth: Palatal and palatoproximal surfaces. 
 Engage the brush at a 45o apical angle in the molar and premolar areas,
 covering three teeth at a time. Clean each segment with 20 short
 back-and-forth strokes. To reach the palatal surface of the anterior teeth, insert
 the brush vertically.
Mandibular teeth: Facioproximal, lingual and linguoproximal surfaces.
 The same as the maxillary teeth. In the anterior lingual region the brush is
 inserted vertically, using the lingual surface of the mandible as a guide plane,
 and with the bristles angulated into the gingival sulci.
Occlusal surface:
 Press the bristles firmly on the occlusal surfaces with the ends as deeply
 as possible into the pits and fissures. Activate the brush with 20 short
 back-and-forth strokes, advancing section by section until all posterior teeth in
 all four quadrants are cleaned.
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Topic Thirteen: Journel Paper From: JADA - 1994 - 9  
1. Why is glass ionomer cement so popular?
  * G.I. is now most widely used luting agent worldwide.
  * Cement is the least improved dental material relative to physical & working
  characteristics. - hard to obtain adhesion to a wet substance such as dentin.
  * G.I. is 1) Easy mixing. 2) High-flow characteristics. 3) Cariostatic - most. 4)
  Adhesion to tooth - moderate bond. 5) Time - minimal mixing time. 6)
  Money - relatively inexpensive. 7) Fluoride release.
  But 1) Not easy to use properly. 2) Cause significant postoperative tooth
  sensitivity. 3) Moderately soluble in mouth -only resin is insoluble 4) Slightly
  less than optimal strength - resin nearly tooth structure strength is best.
 * Resin modifications of glass ionomer cements may be the ideal ones.
2. Tetracycline - loaded fibers as adjunctive treatment in periodontal disease.
 * Effective antibacterial concentrations are difficult to maintain for a sufficient
  period in pocket: 1) poor concentration by mouth rinse. 2) rapid dissipation
  of irrigation solutions. 3) relatively low concentrations achievable with high
  systemic doses of antibiotics.
 * Concentrations in gingival fluid are more than 100 times peak level than
  systemic oral TC administration.
 * Result: 1) Reduction in pocket depth - 2.8 mm average. 2)Bleeding on
  probing - 24 to 37 % less. 3) Adverse effect - swelling, redness, itching and
  mild gingival erythema and soreness(2 patients dropped)
 * Fiber placed in periodontal pocket to deliver TC continuously for 10 days
  was effective in reducing pocket depth and bleeding on probing when used
  as an adjunct to scaling and root planing in refractory disease sites.
3. Effectiveness, side effect and long-term status of night guard vital bleaching.
 * The use of 10% carbamide peroxide solution in the bleaching of vital teeth is
  very common and successful.
  * Discoloring teeth - inherent, aging, trauma, fluorosis and TC staining.
  * About the research: 1) Materials and method - 10% carbamide peroxide,
  night guard, 6 to 8 hours for 6 weeks, success determining. 2) Result - a>
  75% of TC gr. and 96.7% of non-TC gr. succeed in 6 weeks. b> 74% in 13
  to 25 mths and 62% in 31 to 42 mths still successful. 3) Side effect - a>
  tooth sensitivity caused by the easy passage of the hydrogen peroxide and
  urea through the teeth to the pulp, resulting in a reversible pulpitis. b>
  gingival irritation caused by either mechanical irritation from the nightguard
  or chemical irritation of the solution. c> but none reported any lasting side
  effect. 4) TC gr. has less successful rate due to internal staining.
4. Guided tissue regeneration: An adjunct to endodontic surgery.
 * Membrane barriers (Gore-tex) used in conjunction with periodontal surgery
  have promoted regeneration of lost marginal attachment. Membrane barriers
  also may be indicated during surgical endodontics, in selected cases, where
  primary apical lesions are complicated by the loss of marginal attachment.
 * GTR restored periodontal support with bone formation in class II furcations,
  as well as in two- and three- walled vertical defects.
 * Researchers found that a membrane barrier,such as Gore-tex placed over the
  surgical defect before flap replacement, prevents the downward epithelial
  proliferation. -> periodontal ligament cells repopulate the denuded root
  surface -> then these cells can recreate the periodontal attachment and
  attract cells from the alveolar crest that can differentiate into bone.
 * Epithelial proliferation may result in a long junctional epithelial and chronic
  periodontal defect.
  * Drawbacks - expense, additional treatment time and re-entry required to
  remove the material (one resorbable membrane received approval only).
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Topic Fourteen: About Dental X Ray
 
1. The radiation of full mouth X ray (20 or 22 PA + BW) equals:
 A. One chest X ray.
 B. The radiation you get from the sun for one year under normal condition.
2. Is pregnant lady suitable for dental X ray?
 Waiting for your answer.
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Topic Fifteen: TREATMENT PLAN PRESENTATION
 
TABLE OF CONTENTS
SUBJECT
A.  PATIENT PROFILE
B.  HISTORICAL INFORMATION
   1. CHIEF COMPLAINT
   2. DESIRE FOR TREATMENT
C.  MEDICAL HISTORY
D.  DENTAL HISTORY
E.  PSYCHOLOGICAL HISTORY
F.  CLINICAL EXAMINATION
   1. EXTERNAL EXAMINATION
   2. INTRA-ORAL SOFT TISSUE EXAMINATION
   3. DENTITION
   4. PERIODONTAL EXAMINATION
   5. OCCLUSAL EXAMINATION
   6. RADIOGRAPHIC EXAMINATION
   7. EXAMINATION OF INDIVIDUAL TOOTH
G.  CONSULTATION
H.  DIAGNOSIS
I.  PROGNOSIS
J.  TREATMENT PLAN OBJECTIVE
K.  OPTIMAL TREATMENT PLAN
L.  IDEAL TREATMENT PLAN
M.  ORAL HEALTH FOLLOW-UP AND MAINTENANCE
  

A. PATIENT PROFILE
  Name:      Pang, Dan-Hung
  Sex:       Male
  Age:       27
  Race:       Oriental
  Marital Status:   Single
  Occupation:    Sudent

B. HISTORICAL INFORMATION
  1. CHIEF COMPLAINT
   The patient wants to have a complete dental check up.
  2. DESIRE FOR TREATMENT
   He wants all his carious teeth be treated as soon as possible. As for the
   unfitting crowns, patient needs some more time to save money for further
   treatment.

C. MEDICAL HISTORY
  Height:       5'11"
  Weight:       180 lbs
  Serious Past illness:  Hepatitis B
            Patient suffered from Hepatitis B in 1979. After he
            received the treatment, patient was told by his
            physician that he was cured.
  Patient has smoked for 15 years. He smokes 20 cigarettes every day.
  He used to drink a lot of alcohol. But he quit drinking two years ago.
  ASA Class II.

D. DENTAL HISTORY
  Patient suffers generalized moderate gingivitis and localized early adult
  periodontitis due to inadequate oral hygiene. And he also has several
  amalgam and composite fillings. By the way, there are five Endo treated
  teeth and six FVCs in his mouth.He went to a private dental clinic for
  composite filling for tooth #6 in May 1993 which was his last dental visit.

E. PSYCHOLOGICAL HISTORY
  The patient is very cooperative and patient. And he is Class I philosophical.
  
F. CLINICAL EXAMINATION
  1. EXTERNAL EXAMINATION
   @ Straight profile
   @ Lip length: normal
   @ Lip line : medium
   @ Symmetrical appearance
   @ No palpable enlarged preauricular, submandibular or cervical lymph
    nodes.
   @ Facial skin and palpation of muscles: no significant findings.
   @ TMJ Examination: no pain or clicking sound when opening mouth.
  2. INTRA-ORAL SOFT TISSUE EXAMINATION
   Lip, floor of mouth, tongue, soft palate, oropharynx, salivary gland and
   mucosa present no abnormalities. Salivary flow and neuromuscular
   coordination are within normal limit. There is melanin pigmentation over
   maxillary and mandibular gingivae.
  3. DENTITION
   @ Missing teeth # 1, 16, 17, 32
   @ Wear facet on # 23, 24, 25
   @ Defective amalgam restoration # 4, 13
   @ Defective composite restoration # 2, 15, 20
   @ Caries # 2(D), 3(DLG), 5(M,D), 6(D), 12(D), 15(B)
   @ Slight crowding on #23, 24, 25, 26
  4. PERIODONTAL EXAMINATION
   @ Poor oral hygiene
   @ Gingiva: Generalized moderate plaque induced gingivitis.
        Defective restoration associated gingivitis on # 3, 4, 13, 14,
        15, 18, 19, 29, 30 and 31.
        Gingiva index: 2 - 3.
        All marginal gingiva is slightly red and swollen due to
        inflammation. And general bleeding on probing can be seen.
   @ Plaque index: 2.
   @ Calculus code: 2. Especially on the buccal side of # 2, 3, 14, and 15
        and the lingual side of # 23, 24, 25 and 26, a lot of calculus
        present.
   @ Localized early adult periodontitis: # 18, 19 and 28.
   @ Periapical periodontitis: # 19 and 29 (Endo related).
   @ Pocket depth: between 2 and 4 mm, except on the mid-lingual part of
        # 18 (7mm) and disto-palatal part of # 14 (5mm).
   @ Mobility: overall normal except # 18 and 19 (1).
   @ Furcation involvement: Grade II on both buccal and lingual sides of #
        18 , 19 with horizontal depth 2mm. Grade I on both buccal
        and lingual sides of # 30 and buccal side of # 31.
   @ No gingival recession.
  5. OCCLUSAL EXAMINATION
   @ Arch form: square.
   @ Arch relations: - Molar: Cl III.
           - Canine: Cl I.
           - Incisor: edge to edge.
   @ Midline:  no deviation.
   @ Anterior vertical overbite: No (because edge to edge).
   @ Anterior horizontal overbite: No.
   @ Occlusal plane: Smooth curve of Spee.
   @ Centric stop: #2-31, #14-19 and #15-18.
   @ Right lateral movement: - Working side: canine guidance.
              - Balancing side:  no contact.
   @ Left lateral movement: - Working side: canine guidance.
              - Balancing side:  no contact.
   @ Protrusive movement: anterior guidance, no deviation.
   @ Occlusal scheme: canine guidance.
   @ Mandibular deviation upon opening: no.
  6. RADIOGRAPHIC EXAMINATION 
   @ Character of bone: Good bone trabeculation.
   @ Lamina dura: Continuous around all the teeth except apical area of
          distal root of tooth #19 and root of tooth #29 and the
          furcation area of tooth #19.
   @ PDL:  Consistent, even normal widths.
   @ Caries: #2 (D) #3 (MO) #4 (DO) #5 (M,D) #6 (D) #12 (D) #13(DO)
          #20 (DO)
   @ Clinically, crown/root ratio: favorable.
   @ Apical radiolucence: Distal root of tooth #19 and root of tooth #29.
   @ Restoration: Crown overhang of teeth #18, #19, #29 and #30.
         Amalgam overhang of teeth #3, #4 and #15.
   @ Endo filling: Undercondensed filling of teeth #14, #30 and #31.
         Under filling of tooth #19.
         Faded paste filling of tooth #29.
  7. EXAMINATION OF INDIVIDUAL TOOTH
   7-1. Examination of individual tooth
    Tooth# Tooth Position Existing Restoration   Defect
     1    Missing
     2    Normal  DLG, M pit composite D, M pit caries
     3    Normal  MO amalgam     DLG, MO caries
     4    Normal  DO amalgam     DO 2nd caries
     5    Normal  M, D caries
     6    Normal  M composite     D caries
     7    Normal  B composite (V)
     8    Normal            Incisal crack
     9    Normal
    10    Normal
     11    Normal            B craze line
     12    Normal            D caries
     13    Normal  DO amalgam     DO 2nd caries
     14    Normal  FVC        Open margin,
                        Undercondensed
                             Endo
     15    Normal  MO, L amalgam    B, D pit caries
     16    Missing
     17    Missing
     18    Normal  FVC        Open margin
     19    Normal  FVC        Underfilling Endo
                             radiolucence over
                             D root apex
    20    Normal  DO composite    DO 2nd caries
     21    Normal
     22    Normal
     23    Crowding
     24    Crowding
     25    Crowding
     26    Crowding
     27    Normal
     28    Normal
     29    Normal  FVC         Faded Endo paste
                         filling, Apical
                              radiolucence
     30    Normal  FVC         Underfilling Endo,
                              Open margin
     31    Normal  FVC         Underfilling Endo,
                              Open margin
     32    Missing
  
G. CONSULTATION
  1. Periodontal consultation: Scaling and root planing. Provisional treatment
        of defective restorations. After Endo treatment, reevaluate
        the periodontal condition. It is possible to perform osseous
        surgery for crown lengthening in UL, LL, and LR quadrants.
  2. Endodontic consultation: Retreat teeth #14, #19, #29, #30 and #31.
  3. Operative dentistry consultation: Pulpal diagnosis: teeth #13, #15, #18,
        #20. Amalgam filling of teeth #2 (OD,M pit), #3 (MO,DLG),
        #4 (DO), #5 (MO,DO), #12 (DO), #13 (DO) and #20 (DO).
        Composite filling of teeth #6 (D) and #8 (Incisal).
  4. Restorative consultation: After endodontic treatment, cast post and core
        of teeth #14, #19, #29, #30 and #31. FVC of teeth #14, #15,
        #18, #19, #29, #30 and #31.
  5. Orthodontic consultation: Basically patient's malocclusion is caused by
        dental problem. Patient's occlusion is slight Cl III with
        edge-to-edge relationship of anterior teeth. Besides P't has
        lower anterior teeth crowding. It will take almost 9 to 12
        months to finish Ortho treatment. The treatment will get an
        ideal result of overjet and overbite with full mouth wire and
        bracket. And because of the lower anterior crowding, it is
        possible to strip the lower anterior teeth in order to get
        adequate space.
 
H. DIAGNOSIS
   @ Generalized moderate plaque induced gingivitis.
   @ Defective restoration associated gingivitis.
   @ Gingival index: 2 - 3.
   @ Plaque index: 2.
   @ Calculus index: 2.
   @ Localized early adult periodontitis: #18, #19 and #28.
   @ Periapical periodontitis: #19 and #29.
   @ Unsuccessful Endo.
   @ Defective restoration.
   @ Caries.
   @ Class III maocclusion with anterior teeth edge to edge.

I. PROGNOSIS
  1. Periodontal prognosis: overall is fair except for teeth #18 and #19 which
      have furcation involvement grade II. Especially the prognosis of
      tooth #19 depends mainly on the success of Endo retreatment.
      Because it is Endo related periodontitis, with a successful Endo
      treatment tooth #19 can have a guarded prognosis. Otherwise it
      will be poor prognosis. And it is doomed to be extracted.
  2. Restorative prognosis: is good as long as the patient is cooperative in
      following the treatment plan and really does a good job in
      maintaining his oral hygiene. Also the prognosis will depend on the
      success of Endo and Perio treatment.

J. TREATMENT PLAN OBJECTIVE
  Because of the patient's inadequate oral hygiene, he suffers generalized
  periodontal disease. And he also has several carious lesions. In order to
  solve these 2 important problems, we should emphasize on the importance
  of oral hygiene. After the initial OHI, we still should pay more attention to
  make sure that patient can keep good oral hygiene. Otherwise no matter
  how hard we try, the result will end up with failure. Patient has 5 Endo
  treated teeth in his mouth. But all of their qualities are unacceptable. When
  we retreat these teeth, not only should we do our best to perform perfect
  treatment but also we should make routine followup for these teeth.
  Especially pay great attention to radiographic change (apical radiolucence of
  teeth #19 and #29). After we confirm patient's ability in maintaining oral
  hygiene, we can start to perform restorative treatment.

K. OPTIMAL TREATMENT PLAN
  Phase 1 : Initial Phase
   1. Mounted diagnostic cast
   2. FMX taken
   3. Study photo taken
   4. OHI
   5. Reevaluation for patient's oral hygiene - every week
   6. Scaling and root planing
   7. Reevaluation for Perio - 4 weeks
  Phase 2 : Restorative Phase
   1. Pulpal diagnosis: ##13, #15, #18 and #20.
   2. Operative Dentistry:
       #2 - M pit amalgam                 
       #3 - MO and DLG amalgam
       #4 - DO amalgam
       #5 - MO and DO amalgam
       #6 - D composite
       #8 - Incisal composite
       #12 - DO amalgam
       #13 - DO amalgam
       #20 - DO amalgam
  Phase 3 : Provisional Phase
   Make provisional crowns for teeth #14, #18, #19, #29, #30,#31 which
   need Endo retreatment.
  Phase 4 : Endodontic Phase
   Retreatment of teeth #14, #19, #29, #30 and #31.
  Phase 5 : Periodontal Surgery Phase
   Osseous surgery for crown lengthening in UL, LL and LR quadrants. But
   whether this surgery is needed or not depends on the result of Endo
   treatment and the healing condition of periodontal tissue.
  Phase 6 : Restorative Phase
   1. Cast post and core fabrication:
       #14, #19, #29, #30 and #31: prepare post space, cast post and
       core
   2. Fix Prosthesis:
       #14 - FVC
       #15 - FVC
       #18 - FVC
       #19 - FVC
       #29 - PFM
       #30 - FVC
       #31 - FVC
  Phase 7 : Finishing Phase
   1. Final occlusal adjustment
   2. Polish all restoration
   3. Reevaluation
   4. Recall : 3 months for periodontal and restorative checkup
 
L. IDEAL TREATMENT PLAN
  Phase 1 to Phase 5 are the same as the previous plan.
  Phase 6 : Orthodontic Phase.
       With full mouth wire and bracket, to get a better occlusion in 9
       to 12 months.
  Phase 7 : Restorative Phase: The same as previous plan.
  Phase 8 : Finishing phase: The same as previous plan.
 
M. ORAL HEALTH FOLLOW-UP AND MAINTENANCE
  Periodontal prophy every 3 months. If patient can maintain his oral hygiene,
  it is feasible to make it every 4 months. Check the patient's ability to keep
  oral hygiene.
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