To evaluate the better method of implant insertion into the osteotomy site in compromised quality bone for attaining optimal primary stability and thereby achieving the osseointegration for the ultimate success of implant. A total of 32 specimens (wood blocks) simulating D4 bone, were categorized into two groups. The osteotomy site was prepared as per the protocol and implants were placed till the level of the block. The insertion torque was quantified using digital Kratos torque meter. While the implants were inserted and abutments placed by hand ratcheting in the first group; they were motor-driven in the second group. Later pullout test was carried out in universal testing machine and results were analyzed using IBM SPSS Statistics for Windows Software, version 22 (IBM Corp., Armonk, NY, USA). The mean pull out force values obtained in implants placed by hand driven method were 624.375 N while the force values for implants inserted by motor-driven was 692.625 N. There was a statistically significant difference between hand and motor driven implant into the osteotomy site (p<0.05) between the groups. Of the different methods of implant insertion evaluated in this study, motor-driven imply to have a better primary stability indicating better integration with the bone to become a successful implant.

A BSTRACT Objective: The purpose of the study is to assess the method of implant insertion in D3 and D4 bones and influence of insertion torque for achieving better primary implant stability. Materials and Methods: A total of 32 specimens (wood blocks) simulating D4 and D3 bone were grouped into 1, 2, 3, and 4. In groups 1 and 3, the implant and abutment were placed by manual method while in groups 2 and 4 by motor-driven method. The osteotomy site was prepared as per the protocol for soft bone, and implants were placed till the implant platform was in flush with the surface of the block. After achieving a standard insertion torque of 40 N.cm, pullout test was carried out with a universal testing machine and results were analyzed by one-way analysis of variance. Results: An intergroup comparison of peak loads revealed an overall statistically significant difference ( P < 0.0001) with a mean of 442.638 N, maximum in group 4 and least (202.963 N) in group 1. The mean elongation break was found to be maximum in group 3 samples (81.67600%) and less in group 4 (37.15113%). Intergroup comparison of Young’s modulus was statistically significant ( P < 0.0001) with a mean value found to be minimum among group 1 samples (597.54750 MPa) and maximum in group 2 (1056.76463 MPa). An intergroup comparison of yield points was found to be maximum among group 4 samples (16.17238MPa) and least in group 1 (5.77438MPa). Conclusion: The D3 bone sample provided greater primary stability of implant than D4 bone samples, and the motor-driven implant seemed to have improved stability than that placed manually.

Aim:To evaluate the effect of hyperbaric oxygen (HBO) therapy on the osseointegration of dental implants by resonance frequency analysis. Materials and methods: Six rabbits of age 2 to 2 and 1/2 years, weight approximately 2 kg were selected and tagged 1-6. For all the animals' right femur was selected as a control group (R) and left femur as test group (L). Initially, implants of dimensions 3.75x8mm (Adin Touareg) were placed in the right femur. Implant stability quotient (ISQ) values were recorded using OSSTELL ISQ at the time of surgery (R 0 ), after one month (R 1 ), and the end of the second month (R 2 ). After two months of uneventful healing, implants were placed on the left femur of all the six rabbits and three were grouped as 2S (subjected to 2 HBO sessions at the weekly interval) and other three as 4S (subjected to 4 HBO sessions at weekly interval for a month). At the time of surgery (L 0 ), end of one month (L 1 ) and two months (L 2 ), ISQ values were recorded and subjected to statistical analysis. The total duration of the study was 4 months from 3 March 2013 to 03 July 2013. Results: The data were statistically analyzed using t-test and analysis of variance (ANOVA) F. On the comparison between the control group (R) and test groups (2S and 4S) ISQ values for test groups were more which was highly statistically significant (p <0.001). Among the two test groups 4S group has more ISQ values compared to 2S (p <0.001). Conclusion: This study indicated that HBO therapy has a promotive effect on the rate of osseointegration of dental implants. Clinical significance: Study opens new scope for further in vivo research in utilizing hyperbaric oxygen therapy (HBOT) in implant surgeries, maxillofacial trauma cases and irradiated patients to hasten or improve osseointegration.