A coronally positioned pedicle graft is used when a single tooth exhibits gingival recession and
**Core Concept**
A coronally positioned pedicle graft is a surgical technique used in periodontal therapy to cover exposed roots and improve the aesthetics of a single tooth with gingival recession, while preserving the pedicle (a flap of tissue) attached to the tooth. This procedure is often chosen for teeth with insufficient attached gingiva or when the recession is limited to a single tooth.
**Why the Correct Answer is Right**
The coronally positioned pedicle graft involves incising the flap apically to the recession defect, and then reflecting it coronally to cover the exposed root surface. The pedicle is then sutured in place, taking care not to compromise the blood supply to the graft. This technique relies on the presence of a healthy pedicle with an adequate blood supply to ensure the success of the procedure. The coronally positioned pedicle graft is particularly useful for teeth with mild to moderate gingival recession, and it is often preferred over other grafting procedures due to its simplicity and minimal morbidity.
**Why Each Wrong Option is Incorrect**
* **Option A**: This option is incorrect because a coronally positioned pedicle graft is not typically used for teeth with severe gingival recession or those that require significant bone augmentation. In such cases, a more extensive grafting procedure may be necessary.
* **Option B**: This option is incorrect because a free gingival graft is used to provide additional attached gingiva in areas with insufficient tissue, whereas a coronally positioned pedicle graft is used to cover exposed roots and improve aesthetics.
* **Option C**: This option is incorrect because a connective tissue graft is used to cover exposed roots and provide additional attached gingiva, but it involves harvesting tissue from a donor site, which may not be necessary in cases where a coronally positioned pedicle graft can be used.
**Clinical Pearl / High-Yield Fact**
When planning a coronally positioned pedicle graft, it is essential to assess the adequacy of the pedicle's blood supply to ensure the success of the procedure. This can be done by evaluating the color and consistency of the pedicle, as well as the presence of bleeding upon incision.
**Correct Answer:** C. A connective tissue graft is used to cover exposed roots and provide additional attached gingiva, but it involves harvesting tissue from a donor site, which may not be necessary in cases where a coronally positioned pedicle graft can be used.