Title: 3020 - Primary Stability and Heat Generated From Parallel and Tapered Implants


Borvornwut Buranawat (Presenter)
Thammasat University

Panot Chamaibupa, Thammasat University
Jintamai Suwanprateep, MTEC
Thawatchai Sigsom, MTEC
Napus Punsorn, Thammasat University
PitChayatida Jantoo, Thammasat University


Objectives: Heat generation during osteotomy and insertion of implant has been discussed as a risk factor for bone necrosis and implant failure. Tapered or self-tapping implants are now widely used to increase primary stability, particularly in compromised bone situations. In this study, implant primary stability and heat production during osteotomy and insertion of parallel and tapered implants in different bone types were evaluated.

Methods: 64 samples of artificial bone block with different bone density (type I-IV) were employed in this study. Sixteen samples of each bone type were then divided into two groups for parallel and tapered implants. Osteomy preparation and implant placement were performed following standard protocol recommended by the manufacturer. The initial (T0) and the highest temperature produce during procedures (Tmax) were measured using infrared thermometers. Insertion torque and ISQ value were also measured to evaluate primary stability of implant placed in different bone types.

Results: Heat generated during osteotomy preparation in bone type I and II from parallel implant drills were higher than tapered implant drills but were not statistically significant. However, in bone type III and IV, the heat generated by tapered implant drills were significantly higher than parallel implant drills (P=0.0004; P=0.001, respectively). Overall, the heat generation in bone type I was significantly highest than other bone types in both parallel and tapered implant drills (P=0.023; P=0.002, respectively). For implant insertion, implant shape and bone types did not show any significant difference in heat generation (P=0.056). For primary stability of implant, ISQ values of tapered implant were higher than parallel implant in bone type III and IV, however, implant designs and bone types did not show any significant difference in ISQ values (P=0.073).

Conclusions: Bone quality has a significantly greater influence on heat generation during osteotomy preparation than implant designs.

Disclosure Statement:
The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: NONE