A novel cryo-mechanical approach for the removal of blocked nonretrievable implant components
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A novel cryo-mechanical approach for the removal of blocked nonretrievable implant components. / Joda, Tim; Wittneben, Julia-Gabriela; Brägger, Urs.
In: The International journal of oral & maxillofacial implants, Vol. 28, No. 1, 2013, p. e45-7.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - A novel cryo-mechanical approach for the removal of blocked nonretrievable implant components
AU - Joda, Tim
AU - Wittneben, Julia-Gabriela
AU - Brägger, Urs
PY - 2013
Y1 - 2013
N2 - The removal of nonretrievable implant components represents a challenge in implant dentistry. The mechanical approach involves the risk of damaging the implant connection or the bone-to-implant interface. This case report describes a cryo-mechanical approach for the safe removal of a nonretrievable implant component. A patient had an implant surgically placed in a private practice. When the patient returned to the restorative dentist to make a definitive impression, the healing abutment could not be loosened. The patient was referred to the Division of Fixed Prosthodontics (University of Bern, Switzerland), where the stripped screw hole was enlarged with a special drill from a service kit of the implant provider. Although an extraction bolt was screwed into the opening and the torque ratchet was activated, the healing abutment would not loosen. A novel approach was attempted whereby the healing abutment was cooled with dry ice (CO2). The cooling effect seemingly caused shrinkage of the healing abutment and a reduction of the connection forces between the implant and the nonretrievable component. The approach of creating an access hole for the application of reverse torque via the extraction bolt in combination with the thermal effect led to the successful removal of the blocked component. Neither the implant connection nor the bone-to-implant interface was damaged. The combined cryo-mechanical procedure allowed the implant to be successfully restored.
AB - The removal of nonretrievable implant components represents a challenge in implant dentistry. The mechanical approach involves the risk of damaging the implant connection or the bone-to-implant interface. This case report describes a cryo-mechanical approach for the safe removal of a nonretrievable implant component. A patient had an implant surgically placed in a private practice. When the patient returned to the restorative dentist to make a definitive impression, the healing abutment could not be loosened. The patient was referred to the Division of Fixed Prosthodontics (University of Bern, Switzerland), where the stripped screw hole was enlarged with a special drill from a service kit of the implant provider. Although an extraction bolt was screwed into the opening and the torque ratchet was activated, the healing abutment would not loosen. A novel approach was attempted whereby the healing abutment was cooled with dry ice (CO2). The cooling effect seemingly caused shrinkage of the healing abutment and a reduction of the connection forces between the implant and the nonretrievable component. The approach of creating an access hole for the application of reverse torque via the extraction bolt in combination with the thermal effect led to the successful removal of the blocked component. Neither the implant connection nor the bone-to-implant interface was damaged. The combined cryo-mechanical procedure allowed the implant to be successfully restored.
KW - Bicuspid
KW - Cold Temperature
KW - Dental Abutments
KW - Dental Implant-Abutment Design
KW - Dental Implants
KW - Device Removal
KW - Humans
KW - Male
KW - Middle Aged
KW - Torque
M3 - SCORING: Journal article
C2 - 23377081
VL - 28
SP - e45-7
JO - INT J ORAL MAX IMPL
JF - INT J ORAL MAX IMPL
SN - 0882-2786
IS - 1
ER -
