Basics of Dentistry

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Overview

*Review embryology, anatomy

Dental History

  • Biodata
    • Name
    • Age
    • Sex
    • Residence
    • Occupation
  • Presenting complaints
    • Should be clear and specific, with duration for each, for example “left-sided lower jaw pain for 3 days” rather than just “jaw pain”
  • History of presenting illness
    • Is the patient a referral? From which center?
    • Describe each chief complaint
    • If the chief complaint is pain (very common in dentistry), use SOCRATES to further describe, and establish if pain is typical or atypical dental pain
    • What management if any has been carried out so far, if any
  • Dental history
    • Dental habits e.g. tooth brushing, flossing
    • Nutrition and snacking habits – cariogenic diet?
    • Any previous dental visits? If so, why?
    • Any history of tooth extractions under local anesthesia (XLA)
    • Any history of oral surgery? Any associated complications e.g. bleeding?
  • Past medical and surgical history
    • History of known chronic illnesses
    • Is the patient currently taking any medication? – e.g. anticoagulants which may cause excessive bleeding in case a procedure is to be carried out
    • History of past admissions
    • History of blood transfusion
    • History of past non-dental surgeries
    • Food or drug allergy and atopy history
  • Family and social history
    • Insurance cover – affordability of services; may influence choice of treatment, e.g. MMF over ORIF
    • Occupation
    • Residence
    • Drug and alcohol history – Quantify! Alcohol may be associated with poor oral hygiene (OH), cigarettes and miraa may cause tooth staining, any ingested substances may cause irritation or injury to oral mucosa.
  • Review of systems
    • Review CNS, CVS, Respiratory, Gastrointestinal, Genitourinary, Integumentary, Endocrine, Musculoskeletal systems
  • Summary of history
    • Create comprehensive summary containing key information captured in history

Dental Examination

  • General examination
    • Vital signs
    • Jaunice, pallor, cyanosis, clubbing, edema, lymphadenopathy, etc.
  • Local examination
    • Extra-oral examination (head and neck exam)
      • Facial symmetry
      • Lip competence – do lips cover teeth at rest?
      • Cervical lymphadenopathy – palpate all groups of cervical nodes from behind the patient
      • Temporomandibular joint
        • Palpate both simultaneously
        • Have the patient open and close and move joint laterally while feeling for clicking, locking, crepitus (note: clicking may be physiological)
        • Palpate muscles of mastication for spasm and tenderness
      • Any other swellings, masses, deformities (congenital or acquired) – should be inspected, palpated and described
      • In trauma history – signs of head injury or facial trauma – periorbital edema and ecchymosis, battle sign, discharge from ears or nose
    • Intra-oral examination
      • Mouth soft tissues
        • Mucosa
          • Should be pink everywhere (may be pigmented in darker-skinned individuals) – check symmetry of pigmentation; the rule is if it is symmetrical it is most likely normal
          • Any ulcers or growths
          • Candidiasis
        • Tongue
          • Should be moving, with a rough (papillated) upper surface and smooth lower surface
          • May be partially depapillated – e.g. geographical tongue/migratory glossitis which is a normal variant and may be hereditary
          • Extensive depapillation where tongue appears completely smooth may indicate pathologies e.g. atrophic glossitis
          • Any ulcers or growths
          • Candidiasis
        • Gingiva/ periodontal condition
          • Should be pink with varying levels of pigmentation
          • When inflamed appear red or dusky
          • Inflamed gingiva bleed when a blunt instrument is run over them
          • Assess for gingival recession
        • Roof of mouth (hard and soft palate)
          • Assess for patency (cleft-palate, fistulae)
          • Any ulcers or growths
          • Parotid gland duct opening near crown of upper 2nd molars (saliva may be visible dripping/pooling slowly)
        • Floor of the mouth
          • Any swellings
          • Any ulcers or growths
          • Submandibular gland duct openings on either side of lingual frenulum (saliva may be seen shooting out)
        • Palatine tonsils
      • Mouth hard tissues (teeth)
        • Tooth notation
        • Tooth pathologies
          • Caries
            • Name affected tooth/teeth according to above notation
            • If there is pain = ‘caries with acute pulpitis’
          • Tooth deposits
            • Plaque – soft, cream, can be brushed off
            • Calculus – hard, cream/darker, cannot be brushed off (removal by scaling), advancing towards gums hence may be associated with gingival recession
          • Tooth mobility – assess for any increase
        • Jaw occlusion
          • Get patient to close jaws and examine relationship between arches
          • Look at path of closure for any obvious prematurities and displacements
          • Check for evidence of tooth wear/tooth surface loss
      • General assessment of oral hygiene (OH)
    • Summary of oral examination
      • Make a comprehensive list of all extraoral and intraoral findings
  • Systemic examination
    • Do a full systemic exam (CNS, CVS, Respiratory, Abdominal, MSK)
    • Thorough CNS exam of extreme importance in trauma to head, e.g. in mandibular fracture. Also rule out any other associated injuries
  • Summary of examination
    • Combined summary of local and systemic exams with relevant positives and negatives highlighted

Investigations in Dentistry

  • Local
    • Imaging
      • Radiography and radiology
        • Intra-oral views
          • Periapical (IOPA – intraoral periapical) – shows all of the tooth, root and surrounding periapical tissue
          • Bitewing – shows crowns and crestal bone levels; used to diagnose caries, overhangs, calculus and bone loss <4mm
          • Occlusal – demonstrates larger areas; used for localization of impacted teeth and salivary calculi
        • Extra-oral views
          • Posteroanterior (PA) mandible – used to diagnose/ assess mandibular fracture
          • Panoramic/ DPT (dental panoramic tomograph)/ OPG (orthopantomagram) – accommodates horseshoe shape of the jaws; useful for gross pathology but less so for subtle changes such as early caries
          • Lateral oblique – largely superseded by panoramic views
          • Reverse Townes – used for condyles
          • Occipito-mental
          • Submento-vertex
      • Advanced imaging
        • Computed tomography (CT) – useful for assessing extensive trauma or pathology, and planning surgery
        • Cone beam computed tomography (CBCT) – helpful in planning implant placement and for assessing teeth undergoing endodontic treatment (root canal), in particular if complex root or pulpal anatomy is suspected
        • Magnetic resonance imaging (MRI) – useful for the TMJ and facial soft tissues
        • Ultrasound – used to image the major salivary glands and soft tissue pathology (cysts/abscesses)
        • Doppler ultrasound – used to assess vascularity of lesions and patency of vessels prior to reconstruction
        • Positron emission tomography (PET) – tumor detection
    • Biopsies
    • Swabs for bacteriology – Sputum, pus, nasal, axillary swabs
    • Cytology – smears for candida, FNA for some masses
    • Specific tooth tests
      • Sensibility testing – to investigate integrity of nerve and hence blood supply
      • Application of cold – using endo-frost or ethyl chloride on cotton held against a dry tooth
      • Application of heat – petroleum jelly applied on tooth to be tested to prevent sticking of heated gutta-percha (GP); No response = tooth non-vital, increased response = pulp is hyperaemic
      • Electric pulp tester – prophy or other proprietary lubricant used as conductive medium on a dry tooth
      • Test cavity – drilling into cavity without LA is an accurate but destructive diagnostic test
      • Percussion – carried out by gently tapping adjacent and suspect teeth with end of a mirror handle; positive response indicates tooth is extruded due to exudate in apical or lateral periodontal tissue
      • Tooth mobility – is increased by decrease in bony support, e.g. due to periodontal disease or apical abscess, and also by a fracture of root or supporting bone
      • Palpation – of buccal sulcus near painful tooth can help determine if there is an associated apical abscess
      • Biting on tooth sloth, gauze or rubber – to try elicit pain due to a cracked tooth
      • Local anesthesia – can help localize organic pain
  • Systemic
    • Complete blood count (CBC)
    • Urea, electrolytes, creatinine (UECs)
    • Blood cultures
    • Urinalysis
Leila Jelle
Leila Jelle

6th Year Medical Student | Hyperexcision Team Member | Avid Hiker & Chocolate Enthusiast

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