Superiorly, the lesion was involving the upper gingivolabial sulcus
which is shown in Figure 1.
The most commonly involved site was mandibular left gingivolabial sulcus (22.2%).
Amongst the snuff dippers mandibular left gingivolabial sulcus (Fig 2), was the most common site of OSCC (22.2%), which was also the most common primary site of snuff dipping in both male and female patients.
In the present study the most common site involved in patients with delay in the diagnosis of OSCC was mandibular left ginigivolabial sulcus (22.2%) followed by mandibular right gingivolabial sulcus (13%).
During Caldwell-Luc procedure, incision is made 5mm below the gingivolabial sulcus
extending from pyriform aperture medially to the maxillary tuberosity laterally.
(1) Remaining extraosseous, they expand into and in front of the piriform aperture, downward into the gingivolabial sulcus
, and laterally into the soft tissue of the face.
Intraorally, there was obliteration of superior gingivolabial sulcus
bilaterally contiguous to maxillary incisors and canines.
Its broad base ensures adequate blood supply and, consequently, high success rate (93%) had been reported.2 Disadvantages of this procedure include the obliteration of gingivolabial sulcus
, making it difficult to use prosthesis in future.
A mass can also extend inferiorly into the gingivolabial sulcus
or laterally into the facial soft tissue and cause a widening of the nasal vestibule, swelling of the upper lip, obliteration of the nasolabial fold, elevation of the nasal floor, and swelling in the nasal and oral cavity.
Incision is usually placed 5 mm above the gingivolabial sulcus
. The site is elevated preserving the mucosa which aids in proper healing.