Ultrasonic surgery is a recently developed system for cutting bone with microvibrations. The aim of this study was to effectuate a histological comparison between conventional drills vs. ultrasonic surgery devices in implant bed preparation. Materials and methods: Ten bovine ribs were appropriately removed from soft tissues (connective, cartilage, fat etc)in order to obtain the underlying bone, and then stored for 1-2 days at 4°C. Each rib was individuated in two halves. On each half 5 implant sites were randomly prepared (10 sites per rib). A single cylindrical bur, 13 mm height and 2 mm width, (Bone System, Milan, Italy) at a speed of 400 rpm was used to prepare the implant sites of group (A) and 5 implant sites was prepare with the piezoelectric device (SURGYSONIC, ESACROM, IMOLA, ITALY) mounted with a diamond-coated cylindrical tip. After implant site preparation the ribs were stored immediately in 10% buffered formalin and processed to obtain thin ground sections. The specimens were processed using the Precise 1 Automated System (Assing, Rome, Italy). Results: osteotomy drill (group A) surfaces treated appeared not very different from those treated with piezoelectric device (group B); A higher magnification showed the presence of microcracks created on the interface. The latter appeared numerous for group A and had thickness and depth amounted to 20-120μ and 500-1000μ, respectively. While they were irrilevant or completely absent in group B. No statistical significant differences were found between the two groups on bone marrow (P:0.174). Conclusions: ultrasonicsurgery device showed a higher performance in terms of accuracy and uniformity in quality of osteotomy cut, compared with conventional rotary instruments
COMPARISON OF CONVENTIONAL DRILLS AND ULTRASONIC OSTEOTOMY FOR DENTAL IMPLANT SITE PREPARATION: A HISTOLOGICAL ANALYSIS IN BOVINE RIBS
CARINCI, Francesco
2011
Abstract
Ultrasonic surgery is a recently developed system for cutting bone with microvibrations. The aim of this study was to effectuate a histological comparison between conventional drills vs. ultrasonic surgery devices in implant bed preparation. Materials and methods: Ten bovine ribs were appropriately removed from soft tissues (connective, cartilage, fat etc)in order to obtain the underlying bone, and then stored for 1-2 days at 4°C. Each rib was individuated in two halves. On each half 5 implant sites were randomly prepared (10 sites per rib). A single cylindrical bur, 13 mm height and 2 mm width, (Bone System, Milan, Italy) at a speed of 400 rpm was used to prepare the implant sites of group (A) and 5 implant sites was prepare with the piezoelectric device (SURGYSONIC, ESACROM, IMOLA, ITALY) mounted with a diamond-coated cylindrical tip. After implant site preparation the ribs were stored immediately in 10% buffered formalin and processed to obtain thin ground sections. The specimens were processed using the Precise 1 Automated System (Assing, Rome, Italy). Results: osteotomy drill (group A) surfaces treated appeared not very different from those treated with piezoelectric device (group B); A higher magnification showed the presence of microcracks created on the interface. The latter appeared numerous for group A and had thickness and depth amounted to 20-120μ and 500-1000μ, respectively. While they were irrilevant or completely absent in group B. No statistical significant differences were found between the two groups on bone marrow (P:0.174). Conclusions: ultrasonicsurgery device showed a higher performance in terms of accuracy and uniformity in quality of osteotomy cut, compared with conventional rotary instrumentsI documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
