Open Collections

Mossadegh, Amir Hossein

University of British Columbia

Objectives: Lateral Ridge Augmentation (LRA) is a surgical technique to gain bone prior to implant placement. At the UBC graduate dental periodontics clinic specialty residents are trained in the LRA technique. Prior and after the surgery each patient receives cone-beam computed tomography (CBCT) scans allowing quantitatively measures the buccal-lingual width as well as the vertical height of the edentulous ridges. The present study evaluated the outcomes of the surgeries performed by residents during their training. Methods: A 10-year retrospective review was done. A total of 30 cases with quality CBCT images were available for the study. All before and after the surgery bone measurements were taken from the CBCT images and subsequently analyzed by the Microview ABA 2.2 software. Study data included a total of 5 linear measurements (2D) which were obtained from the middle of the edentulous ridge and a volumetric (3D) measure. Results: The intra-examiner agreement (duplicate recordings of 5 randomly selected patients) was excellent as indicated by Intra-Class Coefficient values of 0.974 or higher. There was a significant mean increase from before to after the surgery in linear (2D) and volumetric (3D) values. The linear bone gain ranged from 1.5 mm to 2.5mm and volumetric from 250 mm³ to 750 mm³. However, two patients did not gain any bone. Multivariate regression showed that pre-surgery bone volume and the mandible surgeries were strongest predictors of bone gain post-surgery. In maxillary, particularly anterior areas, the LRA surgeries were the least successful. Conclusions: Lateral ridge augmentation before implant placement performed by periodontics specialty residents at the UBC graduate clinic for the majority of patients helped to increase bone. The CBCT image quantitative analyses showed a high level of intra-examiner agreement. Due to small sample size, the study findings need to be validated in future studies with larger sample sizes.

Text

2023-09-30

Attribution-NonCommercial-NoDerivatives 4.0 International

http://hdl.handle.net/2429/82623

Craniofacial Science

University of British Columbia

UBCV

http://creativecommons.org/licenses/by-nc-nd/4.0/