Quick Answer

The open vertical dimension of occlusion (VDO) refers to an increased vertical space between the upper and lower teeth when the jaws are closed, often caused by tooth loss, wear, or jaw disorders. This alteration can affect chewing, speech, facial aesthetics, and overall oral health, requiring tailored dental treatments to restore proper function and appearance.

Infobox: Open Vertical Dimension of Occlusion

TermOpen Vertical Dimension of Occlusion (VDO)
DefinitionIncreased vertical space between upper and lower teeth when jaws are closed
Primary CausesTooth loss, occlusal wear, bruxism, aging, temporomandibular joint disorders
Common SymptomsJaw pain, chewing difficulties, speech problems, aesthetic changes
Treatment OptionsOcclusal adjustment, orthodontics, restorative dentistry, orthognathic surgery
RelevanceMaintains oral function, facial aesthetics, and long-term dental health

Overview of Vertical Dimension of Occlusion

The vertical dimension of occlusion (VDO) is a critical dental measurement describing the vertical distance between the upper and lower teeth when the jaws are closed naturally. This dimension ensures proper alignment and function during activities such as chewing and speaking. Maintaining an optimal VDO allows for balanced force distribution across teeth and jaw structures, preventing undue stress and preserving oral health.

Understanding Open Vertical Dimension

An open vertical dimension occurs when the vertical space between the dental arches increases beyond the normal range. This condition disrupts the natural occlusion, potentially leading to functional impairments and aesthetic concerns. The alteration in VDO can stem from multiple factors, each influencing the oral environment differently.

Causes of Open Vertical Dimension

  • Tooth Loss: Missing teeth cause bite changes, bone resorption, and shifting of adjacent teeth, increasing the vertical gap.
  • Occlusal Wear: Attrition from grinding (bruxism) or chewing reduces tooth height, prompting compensatory elongation of opposing teeth.
  • Aging: Natural changes in facial structure and jaw positioning can alter the vertical dimension over time.
  • Temporomandibular Joint Disorders (TMD): Jaw joint dysfunction may cause compensatory changes that increase the vertical space.

Symptoms and Consequences

An increased vertical dimension can manifest through various signs, including persistent jaw pain due to strain on the temporomandibular joints and surrounding muscles. Functional difficulties such as impaired chewing efficiency and speech articulation problems are common. Aesthetic issues, like an exaggerated overbite or elongated teeth, may affect self-confidence. Additionally, misaligned teeth resulting from altered VDO can complicate oral hygiene, raising the risk of cavities and gum disease.

Why It Matters

Maintaining a proper vertical dimension is essential for preserving oral function, facial harmony, and overall dental health. Disruptions in VDO can lead to chronic discomfort, compromised nutrition due to inefficient chewing, and psychological impacts from altered appearance. Early recognition and management of open vertical dimension prevent long-term complications and improve quality of life.

Treatment Approaches

Non-Surgical Interventions

Initial management often involves occlusal adjustments to reshape tooth surfaces for a balanced bite, reducing joint stress. Orthodontic treatments can realign teeth and close gaps caused by tooth loss or wear. Restorative options such as crowns, bridges, or dentures help rebuild lost tooth structure and recalibrate the vertical dimension.

Surgical Solutions

In severe or complex cases, orthognathic surgery may be necessary to reposition the jaws, restoring functional occlusion and improving facial aesthetics. Such interventions require comprehensive evaluation by dental specialists to tailor treatment plans to individual needs.

Common Misunderstandings

  • Myth: Open vertical dimension only affects appearance.
    Fact: It also impacts chewing, speech, and joint health.
  • Myth: Tooth loss alone does not influence VDO.
    Fact: Missing teeth significantly alter bite and vertical dimension.
  • Myth: Only older adults experience changes in VDO.
    Fact: Bruxism and trauma can affect individuals of any age.

Example

Consider a middle-aged individual who has lost several molars and developed bruxism. Over time, the attrition of remaining teeth and shifting of adjacent teeth increase the vertical dimension, causing jaw discomfort and difficulty chewing. After dental evaluation, a combination of occlusal adjustment and restorative crowns successfully restores the proper vertical dimension, alleviating symptoms and improving function.

Related Terms

  • Occlusion: The contact relationship between upper and lower teeth.
  • Bruxism: Involuntary grinding or clenching of teeth.
  • Temporomandibular Joint Disorder (TMD): Conditions affecting jaw joint function.
  • Orthognathic Surgery: Surgical correction of jaw alignment.
  • Attrition: Wear of tooth surfaces due to mechanical forces.

FAQ

Can open vertical dimension be reversed?

Yes, with appropriate dental treatments such as occlusal adjustments, restorations, orthodontics, or surgery, the vertical dimension can often be restored to a functional and aesthetic state.

Is open vertical dimension painful?

It can cause discomfort, including jaw pain and muscle stiffness, especially if it leads to temporomandibular joint strain.

How is open vertical dimension diagnosed?

Dental professionals assess VDO through clinical examination, bite analysis, and sometimes imaging to evaluate jaw relationships and tooth wear.

Does aging always cause open vertical dimension?

Not always, but age-related changes in facial structure and tooth wear can contribute to alterations in vertical dimension.

Final Answer

The open vertical dimension of occlusion is an increased vertical gap between the upper and lower teeth when the jaws close, often resulting from tooth loss, wear, or jaw disorders. This condition affects oral function, aesthetics, and comfort but can be effectively managed through various dental treatments tailored to individual needs.

References

  1. Okeson, J. P. (2013). Management of Temporomandibular Disorders and Occlusion. Elsevier Health Sciences.
  2. De Boever, J. A., & Carlsson, G. E. (1990). Vertical dimension of occlusion: a review of the literature. Journal of Prosthetic Dentistry, 63(3), 328-332.
  3. McNeill, C. (1997). Management of temporomandibular disorders: concepts and controversies. Journal of Prosthetic Dentistry, 77(5), 510-522.
  4. Okeson, J. P. (2019). Orofacial Pain: Guidelines for Assessment, Diagnosis, and Management. Quintessence Publishing.