Cortical lamina technique: A therapeutic approach for lateral ridge augmentation using guided bone regeneration.
BACKGROUND
The present study aimed at evaluating the efficacy of a novel technique, the bone lamina technique, in horizontal ridge augmentation clinically & radiographically using a combination of allogenic cortical shell, particulate xenograft and resorbable collagen membrane.


METHODS
Localized horizontal ridge defects, in ten patients (6 male, 4 female), with bucco-palatal ridge width less than 5 mm were included in this study. Localised ridge augmentation was performed using bone lamina technique with mineralised allogenic shell of 1 mm thickness trimmed to the appropriate size using stereo-lithographic models and fixed to the recipient site with stainless steel micro-screws of 1 mm diameter. The space between the shell & host bone was filled with particulate xenograft followed by placement of collagen membrane and primary closure of the site. Clinical parameters including ridge width before & after flap reflection & radiographic (CBCT) ridge width measurements were recorded pre-operatively,and six months after the augmentation procedure. Results obtained were analysed statistically.


RESULTS
The mean clinical ridge width before flap reflection (BFR), after flap reflection (AFR) & radiographically was 3.7 ± 0.74 mm, 2 ± 0.70 mm & 1.77 ± 0.71 mm respectively at baseline which increased to 6.8 ± 0.95 mm, 5.15 ± 0.98 mm & 4.90 ± 0.90 mm with a mean gain in ridge width of 3.1 ± 0.63 mm (p< 0.005), 3.15 ± 0.63 mm (p<0.005) & 3.13 ± 0.70 mm (p< 0.005) respectively.


CONCLUSIONS
The present study demonstrates that bone lamina technique can be effective means of horizontal ridge augmentation and the use of mineralized allograft in combination with xenograft and collagen membrane leads to good amount of bone regeneration for subsequent implant placement.Key words:Dental implant, guided bone regeneration, horizontal ridge defect, ridge augmentation.
BDS, Post Graduate Resident, Department of Periodontics, Bapuji Dental College & Hospital, Davangere- 577004, Karnataka, India.
Shree-Lakshmi
SL
Deepika-Penmetsa
MDS, Professor, Department of Periodontics, Bapuji Dental College & Hospital, Davangere- 577004, Karnataka, India.
Raison
R
Thomas
MDS, Professor, Department of Periodontics & Implantology, Bapuji Dental College & Hospital, Davangere- 577004, Karnataka, India.
Tarun-Kumar
TK
Baron
MDS, Senior Lecturer, Department of Periodontics, Bapuji Dental College & Hospital, Davangere- 577004, Karnataka, India.
Rucha
R
Shah
MDS, FICD, FADI, FISOI., Professor & Head, Department of Periodontics, Bapuji Dental College & Hospital, Davangere- 577004, Karnataka, India.
Dhoom-Singh
DS
Mehta