Microstructural volumetric analysis of lateral ridge augmentation using differently conditioned tooth roots.

Abstract:

OBJECTIVES:Previous research revealed that autogenous tooth roots may be biologically equivalent to conventional bone grafts for lateral ridge augmentation. However, these analyses were limited to two dimensions, whereas healing is a volumetric process. The present study aimed at volumetrically assessing the microstructure following lateral ridge augmentation using extracted tooth roots. MATERIAL AND METHODS:The roots of differently conditioned maxillary premolars (i.e., healthy: PM-C; endodontically treated: PM-E; ligature-induced periodontitis: PM-P) and retromolar cortical autogenous bone (AB) blocks were used for lateral ridge augmentation at chronic-type defects in the lower quadrants of n = 16 foxhounds. At 12 weeks, titanium implants were inserted and left to heal for another 3 weeks. Tissue biopsies were scanned using microcomputed tomography (μCT), and volumes of interest were separated at the buccal and oral aspects to measure bone volume per tissue volume (BV/TV), trabecular thickness (Tb.Th), trabecular separation (Tb.Sp), and connectivity density (Conn.D). RESULTS:All groups investigated revealed comparable BV/TV, Tb.Th, Tb.Sp, and Conn.D values at either the augmented buccal or pristine oral aspects, respectively. A gradual but heterogeneous replacement of grafts was observed in all groups, but residual PM fragments were particularly noted in PM-C and PM-P groups. CONCLUSIONS:Differently conditioned PM and AB grafts were associated with a comparable bone microstructure within the grafted area. The duration of replacement resorption may vary considerably among the subjects. CLINICAL RELEVANCE:Autogenous tooth roots may serve as potential alternative to AB for localized alveolar ridge augmentation.

journal_name

Clin Oral Investig

authors

Becker K,Jandik K,Stauber M,Mihatovic I,Drescher D,Schwarz F

doi

10.1007/s00784-018-2723-4

subject

Has Abstract

pub_date

2019-07-01 00:00:00

pages

3063-3071

issue

7

eissn

1432-6981

issn

1436-3771

pii

10.1007/s00784-018-2723-4

journal_volume

23

pub_type

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