Postextraction socket preservation using epithelial connective tissue graft vs porcine collagen matrix. 1-year results of a randomised controlled trial

作者：Meloni Silvio Mario^*; Tallarico Marco; Lolli Francesco Maria; Deledda Alessandro; Pisan Milena; Jovanovic Sascha A

来源：European Journal of Oral Implantology, 2015, 8(1): 39-48.

• bone volume
• porcine collagen matrix
• socket preservation
• soft tissue graft

Purpose: To compare epithelial connective tissue graft vs porcine collagen matrix for sealing postextraction sockets grafted with deproteinised bovine bone.
Materials and methods: A total of 30 patients, who needed a maxillary tooth to be extracted between their premolars and required a delayed, fixed, single implant-supported restoration, had their teeth atraumatically extracted and their sockets grafted with deproteinised bovine bone. Patients were randomised according to a parallel group design into two arms: socket sealing with epithelial connective tissue graft (group A) vs porcine collagen matrix (group B). Outcome measures were: implant success and survival rate, complications, horizontal and vertical alveolar bone dimensional changes measured on Cone Beam computed tomography (CBCT) scans at three levels localised 1, 3, and 5 mm below the most coronal aspect of the bone crest (levels A, B, and C); and between the palatal and buccal wall peaks (level D); and pen-implant marginal bone level changes measured on periapical radiographs.
Results: 15 patients were randomised to group A and 15 to group B. No patients dropped out. No failed implants or complications were reported 1 year after implant placement. Five months after tooth extraction there were no statistically significant differences between the 2 groups for both horizontal and vertical alveolar bone dimensional changes. At level A the difference was 0.13 +/- 0.18; 95% CI 0.04 to 0.26 mm (P = 0.34), at level B it was 0.08 +/- 0.23; 95% CI -0.14 to 0.14 (P = 0.61), at level C it was 0.05 +/- 0.25; 95% CI -0.01 to 0.31 mm (P = 0.55) and at level D it was 0.13 +/- 0.27; 95% CI -0.02 to 0.32 mm (P = 0.67). One year after implant placement there were no statistically significant differences between the 2 groups for pen-implant marginal bone level changes (difference: 0.07 +/- 0.11 mm; 95% CI -0.02 to 0.16; P = 0.41).
Conclusions: When teeth extractions were performed atraumatically and sockets were filled with deproteinised bovine bone, sealing the socket with a porcine collagen matrix or a epithelial connective tissue graft showed similar outcomes. The use of porcine collagen matrix allowed simplification of treatment because no palatal donor site was involved.

• 出版日期2015