What is biologic width of gingiva?
The supracrestal gingival tissue, also known as the biologic width is defined as the dimension that the healthy gingival tissue occupies coronally to the alveolar bone, involving the sum of the junctional epithelium and the connective insertion dimensions [1,2,3].
What is the ideal biological width?
The biologic width is specific to each patient and can range from 0.75-4.3 mm. According to the 1961 paper by Gargiulo, the mean biologic width was found to be 2.04 mm. From this, 1.07 mm is comprised of the connective tissue attachment and another 0.97 mm is occupied by the junctional epithelium.
How is biologic width calculated?
The biologic width can be identified by probing under local anesthesia to the bone level (referred to as “sounding to bone”) and subtracting the sulcus depth from the resulting measurement. If this distance is less than 2 mm at one or more locations, a diagnosis of biologic width violation can be confirmed.
What is biological width in perio?
The biologic width is the distance established from the junctional epithelium and connective tissue attachment to the root surface of a tooth. This is also described as the height between the deepest point of the gingival sulcus and the alveolar bone crest.
Why biologic width is important?
The natural barrier that develops around the teeth and dental implants to protect the alveolar bone from disease and infection is known as the biologic width. As such, biologic width is vital for the preservation of periodontal health and removal of irritation that could damage the periodontium.
What is the biological width around implant?
The biological width around implant is a 3-4mm distance from the top of the peri-implant mucosa to the first bone-to-implant contact or the stabilized top of the adjacent bone, consisting of sulcular epithelium, junctional epithelium and fibrous connective tissue between the epithelium and the first bone-to-implant …
What is attached gingiva?
Attached gingiva – This tissue is adjacent to the free gingiva and is keratinized and firmly attached to the bone structure. It can range from 3-12 mm in height. Free gingiva – This tissue is not attached and forms a collar around the tooth.
How much is the biological width?
The biologic width is patient specific and may vary anywhere from 0.75-4.3 mm. Based on the 1961 paper by Gargiulo, the mean biologic width was determined to be 2.04 mm, of which 1.07 mm is occupied by the connective tissue attachment and another approximate 0.97 mm is occupied by the junctional epithelium.
What happens when you violate biological width?
Around teeth, the most common response to a biologic width violation is gingival inflammation, a significant problem on anterior restorations. The importance of biologic width to surgery relates to its reformation following surgical intervention.
Why does width of attached gingiva increases with age?
It was concluded that the mucogingival junction remains at a probably genetically predetermined location while the teeth move in an occlusal direction through adult life. In the absence of concurrent retraction of the gingival margin this results in an increase of the width of attached gingiva with advancing age.
What size is gingiva?
The gingiva is typically 1 to 3 mm in thickness; because of the bone proximity and lack of anatomic barriers, even small gingival carcinomas can demonstrate bone invasion at the time of initial evaluation.
Why does the width of attached gingiva increase?
What is the biologic width of a gingival sulcus?
This 3 mm constitutes for 1 mm supracrestal connective tissue attachment, 1 mm junctional epithelium and 1 mm for gingival sulcus on an average. This allows for adequate biologic width even when the restoration margins are placed 0.5 mm within the gingival sulcus.[8]
What is the biologic width of a tooth?
The dimension of biologic width is not constant, it depends on the location of the tooth in the alveolus, varies from tooth to tooth, and also from the aspect of the tooth. It has been shown that 3 mm between the preparation margin and alveolar bone maintains periodontal health for 4 to 6 months. [7]
Where is the gingiva located in the mouth?
The attached gingiva is delineated from the oral mucosa by the mucogingival line, except in the palate where no such delineation exists. An interdental papilla is formed by the gingival tissues in the spaces between the teeth (the interproximal spaces).
How big is the gingiva margin in a cat?
On the other hand, the distance from the free gingival margin to the mucogingival junction over the maxillary fourth premolar tooth in a cat would be approximately 1.5 mm and there a probing depth over 0.5 mm would be considered abnormal ( Fig. 18.1 ).