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Shell technique using a rigid resorbable barrier system for localized alveolar ridge augmentation
Author(s) -
Iglhaut Gerhard,
Schwarz Frank,
Gründel Marcel,
Mihatovic Ilja,
Becker Jürgen,
Schliephake Henning
Publication year - 2014
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.12078
Subject(s) - chemistry , alveolar ridge , ridge , dental alveolus , biomedical engineering , dentistry , surgery , medicine , geology , paleontology , implant
Objectives To assess the safety and efficacy of a rigid synthetic barrier system in a shell technique for localized alveolar ridge augmentation. Materials and methods Saddle‐type defects ( n = 4 each) were prepared in the lower jaws of six fox hounds. At two defects, the outer contours were reconstructed using polylactic acid ( D and L isomers) ( PDDL ) pins welded to PDDL plates by ultrasound vibration and the defect area filled using either a natural bone mineral ( NBM ) or NBM + autogenous bone ( AB ) and covered by a native collagen membrane ( CM ). While the third defect was augmented using NBM + AB + CM , the fourth site was left untreated. At 14 weeks, dissected blocks were processed for histomorphometrical analysis [e.g., augmented area ( AA )]. Results AA values (median in mm 2 ) were significantly increased in all guided bone regeneration (GBR) groups [ NBM + PDDL + CM (19.74) > NBM + AB + PDDL + CM (16.98) > NBM + AB + CM (16.66)] when compared with the untreated control sites (7.34). Histological analysis has pointed, in the absence of any foreign‐body reactions, to biodegradation of both PDDL plates/pins and CM . Conclusions (i) All GBR procedures investigated equally supported bone regeneration, (ii) the application of PDDL + CM may be associated with increased mineralized tissue MT and subsequently AA values than CM alone, and (iii) AB may not improve healing at NBM + PDDL + CM ‐treated sites.