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Volumetric changes following ridge preservation or spontaneous healing and early implant placement with simultaneous guided bone regeneration


Naenni, Nadja; Bienz, Stefan P; Muñoz, Fernando; Hämmerle, Christoph H F; Jung, Ronald E; Thoma, Daniel S (2018). Volumetric changes following ridge preservation or spontaneous healing and early implant placement with simultaneous guided bone regeneration. Journal of Clinical Periodontology, 45(4):484-494.

Abstract

AIM To assess volumetric and linear changes following ridge preservation (RP) or spontaneous healing plus early implant placement with or without simultaneous guided bone regeneration (GBR).
MATERIALS AND METHODS In eight adult beagle dogs, the mesial roots of the mandibular P3, P4 and M1 were extracted. Sites were randomized to either ridge preservation (RP) or spontaneous healing (SH). Four weeks later dental implants were placed either with (RP2) or without removing non-integrated DBBM (RP1). In RP2 and SH sites, GBR was applied using a demineralized bovine bone mineral and a resorbable membrane. Impressions were taken postextraction (SH)/postridge preservation (RP1; RP2), before and after implant placement and after healing of 4 and 12 weeks. Casts were digitized to allow for superimposition and measurement of contour alterations.
RESULTS Median ridge width reduction from postextraction (SH)/postridge preservation (RP1;RP2) to implant placement ranged from -13.9% (SH) to -19.7% (RP) (p > .05), whereas from implant placement to sacrifice, it was statistically significantly lower in group RP1 (-5.5%) compared to group SH (-23.4%; p = .0013) and group RP2 (-22.1%; p = .0026). Encompassing the entire study period, median ridge width changes ranged between -17.8% (SH), -24.8% (RP2) and -32.5% (RP1) (p > .05).
CONCLUSIONS Irrespective of the treatment modality and the healing period, part of the ridge contour was lost. Early implant placement after ridge preservation without additional GBR resulted in a more stable ridge contour after implant placement compared to controls.

Abstract

AIM To assess volumetric and linear changes following ridge preservation (RP) or spontaneous healing plus early implant placement with or without simultaneous guided bone regeneration (GBR).
MATERIALS AND METHODS In eight adult beagle dogs, the mesial roots of the mandibular P3, P4 and M1 were extracted. Sites were randomized to either ridge preservation (RP) or spontaneous healing (SH). Four weeks later dental implants were placed either with (RP2) or without removing non-integrated DBBM (RP1). In RP2 and SH sites, GBR was applied using a demineralized bovine bone mineral and a resorbable membrane. Impressions were taken postextraction (SH)/postridge preservation (RP1; RP2), before and after implant placement and after healing of 4 and 12 weeks. Casts were digitized to allow for superimposition and measurement of contour alterations.
RESULTS Median ridge width reduction from postextraction (SH)/postridge preservation (RP1;RP2) to implant placement ranged from -13.9% (SH) to -19.7% (RP) (p > .05), whereas from implant placement to sacrifice, it was statistically significantly lower in group RP1 (-5.5%) compared to group SH (-23.4%; p = .0013) and group RP2 (-22.1%; p = .0026). Encompassing the entire study period, median ridge width changes ranged between -17.8% (SH), -24.8% (RP2) and -32.5% (RP1) (p > .05).
CONCLUSIONS Irrespective of the treatment modality and the healing period, part of the ridge contour was lost. Early implant placement after ridge preservation without additional GBR resulted in a more stable ridge contour after implant placement compared to controls.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Fixed and Removable Prosthodontics
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:April 2018
Deposited On:12 Apr 2018 13:24
Last Modified:13 Apr 2018 11:57
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:0303-6979
Additional Information:For accepted manuscripts: This is the peer reviewed version of the following article: Naenni, Nadja; Bienz, Stefan P; Muñoz, Fernando; Hämmerle, Christoph H F; Jung, Ronald E; Thoma, Daniel S (2018). Volumetric changes following ridge preservation or spontaneous healing and early implant placement with simultaneous guided bone regeneration. Journal of Clinical Periodontology, 45(4):484-494., which has been published in final form at https://doi.org/10.1111/jcpe.12860. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-820227.html#terms).
OA Status:Closed
Publisher DOI:https://doi.org/10.1111/jcpe.12860
PubMed ID:29266354

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