Cervical Tooth Defect: Causes, Symptoms and Treatment
A cervical tooth defect is a loss of hard tooth structure at the junction of the crown and root. It often causes tooth sensitivity and aesthetic concerns.
Things worth knowing about "Cervical tooth defect"
A cervical tooth defect is a loss of hard tooth structure at the junction of the crown and root. It often causes tooth sensitivity and aesthetic concerns.
What is a Cervical Tooth Defect?
A cervical tooth defect, also referred to as a non-carious cervical lesion (NCCL), is a loss of hard tooth substance in the cervical region – the area where the visible crown of the tooth meets the root, near the gumline. This zone is particularly vulnerable to various types of tooth wear. Cervical defects are among the most common findings in dental practice and can affect patients of all ages, though they are more prevalent in older adults.
Causes
Cervical tooth defects can develop through several distinct mechanisms, and in many cases a combination of causes is involved:
- Abrasion: Physical wear caused by excessive or incorrect toothbrushing, especially with a hard-bristled toothbrush, leading to the removal of enamel and dentine in the cervical area.
- Erosion: Chemical dissolution of tooth structure due to acidic foods and beverages (e.g., citrus fruits, carbonated drinks) or gastric acid from conditions such as acid reflux (GERD) or frequent vomiting.
- Attrition: Wear from tooth-to-tooth contact, commonly associated with bruxism (teeth grinding) or clenching.
- Abfraction: Stress-induced microfractures in the cervical region resulting from abnormal occlusal loading or bite forces, which can facilitate further substance loss.
In clinical practice, multifactorial causes are the norm rather than the exception.
Symptoms
Symptoms can range from absent to severe, depending on the extent of the defect:
- Tooth sensitivity (hypersensitivity): Brief, sharp pain triggered by cold, hot, sweet, or acidic stimuli, or by direct tactile contact with the affected area.
- Aesthetic changes: Visible notching or wedge-shaped loss of tooth substance, altered tooth shape, and a yellowish appearance caused by exposed dentine.
- Exposed root surface: When gum recession accompanies the defect, the root surface may become visible and sensitive.
- Absence of symptoms: In some cases, the defect is entirely asymptomatic and is only identified during a routine dental examination.
Diagnosis
Diagnosis is primarily made through a thorough clinical examination by a dentist, who assesses the type, size, and location of the defect. Additional diagnostic steps may include:
- Detailed history of dietary habits and oral hygiene practices
- Assessment of gingival recession
- Dental radiographs (X-rays) to rule out further damage
- Sensitivity testing to evaluate pulp vitality
Treatment
Treatment depends on the underlying cause, the severity of the defect, and the presence of symptoms.
Preventive Measures
- Switching to a soft-bristled toothbrush and adopting a gentle brushing technique (e.g., the Bass technique)
- Reducing intake of acidic foods and beverages
- Managing underlying conditions such as acid reflux or eating disorders
- Fabrication of a custom occlusal splint for patients with bruxism
Conservative Treatment
- Use of desensitising toothpastes or fluoride gels to reduce hypersensitivity
- Professional fluoride application in the dental office
Restorative Treatment
- For larger or symptomatic defects, the cervical area is restored using a composite resin filling (tooth-coloured material) or glass ionomer cement.
Periodontal Measures
- In cases of significant gum recession, a connective tissue graft (soft tissue transplant) may be indicated to cover exposed root surfaces and reduce sensitivity.
Prevention
The most effective prevention involves gentle oral hygiene practices, a balanced diet low in acidic content, regular dental check-ups, and timely management of bruxism and acid reflux. Early detection during routine visits allows for prompt treatment before defects progress to a stage requiring more extensive intervention.
References
- Bartlett D, Shah P. A critical review of non-carious cervical (wear) lesions and the role of abfraction, erosion, and abrasion. Journal of Dental Research, 2006; 85(4):306–312.
- Schlueter N, Luka B. Erosive tooth wear – a review on global prevalence and on its prevalence in risk groups. British Dental Journal, 2018; 224(5):364–370.
- Grippo JO, Simring M, Coleman TA. Abfraction, abrasion, biocorrosion, and the enigma of noncarious cervical lesions. Journal of Esthetic and Restorative Dentistry, 2012; 24(1):10–23.
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