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LONGITUDINAL ANALYSIS OF PERI-IMPLANT KERATINIZED
MUCOSA USING COMPUTER IMAGING
by
Justin Michael Braga
________________________________________________________________
A Thesis Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF SCIENCE
(CRANIOFACIAL BIOLOGY)
August 2009
Copyright 2009 Justin Michael Braga
Object Description
| Title | Longitudinal analysis of peri-implant keratinized mucosa using computer imaging |
| Author | Braga, Justin Michael |
| Author email | jbraga@usc.edu; justinbraga@hotmail.com |
| Degree | Master of Science |
| Document type | Thesis |
| Degree program | Cranio-Facial Biology |
| School | School of Dentistry |
| Date defended/completed | 2009-04-15 |
| Date submitted | 2009 |
| Restricted until | Unrestricted |
| Date published | 2009-06-16 |
| Advisor (committee chair) | Nowzari, Hessam |
| Advisor (committee member) |
Rich, Sandra Navazesh, Mahvash |
| Abstract | Background: Peri-implant keratinized mucosa contributes to long-term health and success of implant-supported restorations. It is more easily maintained and less vulnerable to inflammation than non-keratinized alveolar mucosa. Understanding changes that occur in peri-implant mucosa may influence treatment planning, post- operative procedures and maintenance. Digital photography and computer imaging may enable us to gain a more precise assessment of peri-implant tissue than past methodologies.; Purpose: Monitor changes in peri-implant tissues using ImageJ computer analysis. To identify if changes vary by mesial, mid, distal and surface area of peri-implant keratinized mucosa. In addition, the relationship between tissue thickness, proximity to adjacent dentition, mucosal health and mucosal marginal stability will be investigated.; Methods: Seventeen systemically healthy, non-smokers, receiving one-stage Straumann implants with an adjacent control tooth were enrolled. Digital photographs were taken at baseline, 3 and 6 months after implant placement and analyzed with ImageJ software. Plaque and gingival indices, pocket probing depths, bleeding on probing and tissue thickness were examined at 3 and 6 months. Inter-rater agreement was evaluated by intraclass coefficient.; Results: Twenty-one implants were placed in the mandibular posterior, five 4.8mm regular neck (RN) and sixteen 6.5mm wide neck (WN). Loss of mean width peri-implant keratinized mucosa was significantly greater on the lingual surface than buccal, .7 vs. .1mm respectively (p<.001*). Loss was positively associated with 6.5mm WN implants (p<.001*). Lingual mucosa was significantly more likely thin (p<.02*) and thin tissue decreased twice that of thick (0.4mm vs. 0.2mm, p>.05). Inter-rater agreement intraclass coefficient was .99.; Conclusion: Imaging analysis software, ImageJ, yields a more precise assessment and quantification of peri-implant soft tissues than current chair-side techniques and may facilitate a database for future studies. Lingual peri-implant tissue and wide-neck implants were significantly correlated to a loss of keratinized mucosa. This may be due to tension or "stretching" of mucosa, causing it to thin, making it more susceptible to recession as a manifestation of inflammation. Thinning of mucosa may be a consequence of clinicians positioning and inclination of the implant within the alveolar housing, which is influenced by anatomical limitations, bone resorption patterns and biomechanic requirements. |
| Keyword | keratinized mucosa; implant; computer imaging; keratinized tissue; peri-implant; implant recession; diameter implant; wideneck implant |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m2305 |
| Rights | Braga, Justin Michael |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Braga-2935 |
| Archival file | uscthesesreloadpub_Volume55/etd-Braga-2935.pdf |
Description
| Title | Page 1 |
| Full text | LONGITUDINAL ANALYSIS OF PERI-IMPLANT KERATINIZED MUCOSA USING COMPUTER IMAGING by Justin Michael Braga ________________________________________________________________ A Thesis Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE (CRANIOFACIAL BIOLOGY) August 2009 Copyright 2009 Justin Michael Braga |
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