Augmentation pharyngoplasty is a kind of plastic surgery for the pharynx when the tissue at the back of the mouth is not able to close properly. It is typically used to correct speech problems in children with cleft palate. It may also be used to correct problems from a tonsillectomy or because of degenerative diseases. After the surgery, patients have an easier time pronouncing certain sounds, such as 'p' and 't', and the voice may have a less nasal sound. In this surgery, the posteriorpharyngeal wall is moved forward, making it similar to an adenoid pad and closing the small gap that interferes with clear speech. Several techniques have been used including: rearranging the soft tissue, implanting cartilage and injection or implanting different types of synthetic materials:
Soft tissue advancement: Passavant, attempted to advance the soft tissue of the posterior pharyngeal wall by suturing two palatopharyngeal muscles in the middle to exemplify Passavant’s ridge. Later, he tried to create this ridge by folding a flap of pharyngeal mucosa upon itself. This type of surgery is best for patients with velopharyngeal defects.
Cartilage implants: material,, is implanted to create an anterior projection on the pharyngeal wall. Most of the time, the success rate is low because the surgeons could not get a large enough sample from the ribs to stay in place in the pharyngeal wall. Later, several surgeons only performed this surgery on patients with openings 5 mm wide or less. The ten patients in this study no longer experience hypernasality or audible nasal emissions. Another study was done under the same circumstances, and had a much lower success rate. Pg 320-321
Synthetic materials: synthetic materials used to augment the posterior pharyngeal wall include: silicone , Teflon, Proplast, and collagen. Many of these procedures were abandoned because results were unpredictable, there were post operative complications or the Food and Drug Administration imposed restrictions. Overall these procedures were deemed undesirable in the long term.
