ADVANCED SURGICAL TECHNIQUES
Guided Bone Regeneration
Guided bone regeneration is a process that allows bone growth while retarding the ingrowth of fibrous connec- Itive tissue .and epithelium. It is well recognized that most r bone defects will regenerate with new bone if the invao sion.of connective tissue fr.om adjacent soft tissue can be prevented. Guided bone regeneration uses a barrier that is placed over the bone defect and prevents fibrous tissue ingrowth while the bone underlying the barrier has time . to grow and fill the defect (Fig. 14-59). This technique is particularly useful in the treatment of bccal dehiscence,
where labiobuccal augmentation of bone is required Guided bone regeneration can be performed- simultaneously with implant placement or before stage L A variety of materials may serve as barriers to fibrous tissue
ingrowth. Ideal characteristics of a membrane are outlined in Box 14-7. Expanded p (Gore- Tex) is the most extensively tested material. Resorbable . materials are also now available, eliminating the necessityof removal.
Characteristics of Ideal Membrane
• Ease of handling
• Tolerates exposure