Module Notes: Oral Soft Tissues of the Mouth (SFHOH3 SQA J8W3 04)

Oral Soft Tissues of the Mouth

Introduction to Oral Health Assessment

• SQA Unit Code: J8W3 $04$
• Assessment Preparation: Involves preparing equipment, instruments, materials, and medicaments necessary for oral health assessments.
• Chairside Support: Requires providing close support during individual assessments by:
  • Recording and charting information obtained from examinations of the head, neck, teeth, periodontium, and soft tissues.
  • Monitoring individuals during procedures to identify complications and taking necessary actions.
• Dental Procedure Settings: May occur in various environments:
  • General dental practices.
  • Public dental services.
  • Hospital settings.
  • Domiciliary (home care) or other non-standard environments.

Understanding Oral Soft Tissues

• Definition: Oral soft tissues refer to the various membranes and structures lining the inside of the mouth.
• Key Components:
  • Cheeks
  • Lips
  • Gingiva (Gums): The soft tissues surrounding and supporting the teeth.
  • Tongue: A muscular organ covered in soft tissue and papillae.
  • Floor of the mouth: The area under the tongue.
  • Roof of the mouth: Comprises the hard and soft palate.
• Crucial Roles: These tissues are vital for:
  • Speech.
  • Chewing.
  • Swallowing.
  • Taste.
• Significance of Examination: They are susceptible to conditions ranging from minor irritations to serious diseases, making regular examination by a dentist or oral health professional extremely important for early detection and intervention.

Key Components of Oral Soft Tissues (Detailed)

• Oral Mucosa: The mucous membrane lining the oral cavity.
• Gingiva: Soft tissues surrounding and supporting the teeth.
• Buccal Mucosa: The lining of the cheeks.
• Labial Mucosa: The lining of the lips.
• Tongue: A muscular organ covered in soft tissue and papillae.
• Floor of the Mouth: The area under the tongue.
• Hard Palate: The bony front portion of the roof of the mouth.
• Soft Palate: The muscular back portion of the roof of the mouth.

Importance of Oral Soft Tissues

• Protection: They protect underlying structures from mechanical, chemical, and biological stimuli.
• Secretion: Salivary glands within the oral mucosa produce saliva, which aids in digestion and maintains oral moisture.
• Sensory Function: Contain nerve endings allowing perception of taste, touch, temperature, and pain.
• Speech: The tongue and soft palate are essential for articulation.
• Swallowing: Soft tissues help move food from the mouth into the oesophagus.
• Overall Health Indicator: The condition of oral soft tissues can reflect the overall health of the body.

Common Conditions Affecting Oral Soft Tissues

Regular examination and maintenance are crucial for overall oral health and early problem detection.

$1.$ Xerostomia (Dry Mouth)

• Definition: Refers to dry mouth, a condition caused by reduced saliva production.
• Causes:
  • Systemic Diseases: Diabetes, Sjögren's Syndrome (immune system targets tear and saliva glands, leading to reduced production of tears and saliva).
  • Radiotherapy
  • Increased Age: Can cause a normal reduction in saliva.
  • Therapeutic Drugs: Beta-blockers, Parkinson's disease medications.
  • Dehydration
  • Hormonal Disturbances
• Symptoms: Discomfort, difficulty swallowing, increased risk of infections.
• Treatment: Saliva substitutes (e.g., XEROSTOM with Saliactive, Xylitol mouth spray) are available to provide moisture.

$2.$ Angular Cheilitis

• Description: Inflammation and dry, cracked skin at one or both corners of the mouth.
• Discomfort: Can lead to skin splitting and bleeding, making eating, talking, and smiling uncomfortable.
• Symptoms:
  • Often begins when saliva collects at the corners of the mouth for an extended period, leading to dry, cracked, and irritated skin upon drying.
  • Patients may lick lips to alleviate dryness, worsening irritation.
  • The moist, cracked skin creates an ideal environment for microorganisms (e.g., bacteria, Candida yeast), causing swelling, itching, and burning.
  • Mouth patches may appear white, scaly, and blistered.
• Causes:
  • Poor-fitting dentures.
  • Sagging skin due to weight loss or aging.
  • Thumb-sucking and excessive lip licking in children.
  • Excessive mouth washing or aggressive use of dental floss.
  • Genetic conditions (e.g., Down syndrome, Sjögren's syndrome).
  • Weakened immune systems (e.g., in individuals with diabetes or HIV).
  • Nutritional deficiencies, particularly lack of Vitamin B or iron.
• Treatment:
  • Antibiotic or antifungal cream to treat infections.
  • Petroleum jelly or lip balm with SPF to protect the skin barrier.
  • Dental work to repair dentures or a misaligned bite.
  • Behavior modifications to prevent thumb-sucking.
  • Diet changes or vitamin supplements to correct nutritional deficiencies.
  • Proper oral hygiene routine to keep lips and mouth clean and free from infections.

$3.$ Lichen Planus

• Description: A skin or mucosal disorder.
• Prevalence: Affects middle-aged women more than men, impacting around $2\%$ of the UK population.
• Symptoms:
  • Usually symptomless.
  • Can cause discomfort when eating spicy foods.
• Skin Lesions: Typically resolve within about $18$ months.
• Intraoral Presentation: Appears as white patches affecting the buccal mucosa, tongue, and attached gingivae.

$4.$ Oral Cancer

• Definition: Includes cancer of the lip, tongue, floor of the mouth, cheek, upper and lower jaw bones, and palate.
• Early Detection: Paramount for successful treatment.
• Appearance: Similar to an ulcer, with raised, rolled edges and hardening around the periphery.
• Common Sites: Lips, tongue, soft tissues.
• Referral: Referral to an oral medicine department is recommended.
• Detection Challenges: Often hard to detect because it can be a small, painless white or red spot, easily ignored. Many people lack regular dental care, leading to delayed detection.
• Risk Factors:
  • Smoking.
  • Chewing betel nut.
  • Drinking alcohol.
  • HIV/AIDS.
  • HPV virus.
  • Aging.
  • Chronic mouth irritation.
  • Poor oral hygiene.
• Prevention:
  • Stop using tobacco or avoid starting.
  • Drink alcohol in moderation or abstain completely.
  • See a dentist regularly.
  • Eat a well-balanced diet.
  • Limit exposure to the sun (repeated exposure increases the risk of lip cancer, especially on the lower lip).

$5.$ Oral Thrush (Candida Infection)

• Definition: A type of yeast infection caused by the fungus Candida, most commonly Candida albicans.
• Alternative Name: Commonly known as Thrush.
• Affected Groups: Seen in the young, the elderly, diabetics, and people with weakened immune systems.
• Appearance: Creamy white substance; when removed, it reveals a red, raw mucosa.
• Location: Found on the palate, tongue, or cheek.
• Pain: Usually painless, but can be tender when eating.
• Chronic Candidosis: Seen in denture wearers, often referred to as denture stomatitis.
• Danger: For most people, oral thrush is not dangerous and resolves quickly with treatment.
• Antibiotic Connection: People taking antibiotics often get oral thrush because antibiotics kill beneficial bacteria in the mouth, creating an opportunity for thrush to grow.
• Treatment: Usually straightforward.
  • Prescribed anti-thrush drugs like Nystatin or Miconazole.
  • Administered orally as drops or a gel.
  • Anti-thrush drugs are effective at killing yeast infections and typically have no systemic side effects.

$6.$ Cold Sores

• Cause: Caused by the Herpes Simplex virus.
• Triggers: Sun exposure, stress, menstruation.
• Appearance: Appear on the lip, burst, and then crust over.
• Sensation: A tingling sensation often precedes the outbreak.
• Treatment: Antiviral ointment (e.g., Zovirax containing Aciclovir).
• Duration: Lasts for around $10-14$ days.
• Infectiousness: The patient is infectious during this time, and dental treatment is sometimes avoided.

$7.$ Oral Ulceration

• Causes: Many underlying causes.
• Common Types:
  • Traumatic ulceration: Caused by a sharp cusp, ill-fitting denture, biting the cheek or lip, or toothbrush damage.
  • Aphthous ulceration.
• Monitoring: Ulcers should always be monitored.
• Patient Review: Review the patient weekly to track healing or changes.

Oral Anatomy Reference (Based on Diagrams)

• External Features: Labial frenum (upper and lower), lips, vermillion border.
• Internal Features:
  • Hard palate, Soft palate, Uvula: The roof of the mouth and its posterior extension.
  • Tongue (Dorsal and Ventral surfaces, Lateral border): Muscular organ for speech, taste, and swallowing.
  • Floor of the Mouth: Area beneath the tongue.
  • Buccal Mucosa: Cheek lining.
  • Oral Vestibule: The space bordered anteriorly and laterally by lips and cheeks, and posteriorly and medially by teeth and gums.
  • Tonsil, Tonsillar Fossa, Palatine Tonsil: Lymphatic tissues involved in immunity.
  • Palatoglossal Arch & Palatopharyngeal Arch: Folds of tissue in the posterior oral cavity.
  • Retromolar Area: Area behind the last molar.
  • Incisive Foramen: Opening in the hard palate.

Cleft Lip/Palate

• Definition: Congenital malformation affecting the lips and/or palate.
• Prevalence in UK: Approximately $1$ in $700$ births in the UK are affected.
• Hereditary Risk: Children born to a parent with a cleft have an approximate $1$ in $20$ risk.
• Gender Prevalence: Males are affected more than females.
• Soft Palate Function: The soft palate aids swallowing and breathing by altering the patency of the respiratory and digestive tracts, respectively. It also plays an important role in speech (pronunciation) together with the tongue.
• Anatomical Structures related to Clefts:
  • Philtral ridge, philtrum.
  • Primary palate, secondary palate.
  • Nostril.
• Types of Clefts (Visualized):
  • Normal lip, normal palate.
  • Cleft palate.
  • Left unilateral cleft lip.
  • Left cleft lip.
  • Left unilateral cleft lip and palate.
  • Bilateral cleft lip and palate.
  • Bilateral cleft lip.
  • Bilateral cleft lip with full palate.
• Repair: Visual examples show significant improvement from pre-operation to post-operation (e.g., $1$ year following repair), achieving a better aesthetic and functional outcome.

Textbook References and Future Topics

• Recommended Reading: Use a dental textbook to review oral soft tissue conditions, specifically Chapter $13$, Page $396$ on Common Oral Diseases.
• Upcoming Topics:
  • In the next few weeks, discussion will cover drugs in dentistry relevant to oral conditions.
  • Orthodontics is covered in OH$3$ for clinical assessment and will continue into OH$6$ (potentially related to cleft care coordination).
  • The next lecture will focus on Muscles of Mastication and Facial Expression.