J Korean Assoc Oral Maxillofac Surg.  2013 Apr;39(2):94-99. 10.5125/jkaoms.2013.39.2.94.

Displacement of dental implants into the focal osteoporotic bone marrow defect: a report of three cases

• Lee SC
• Jeong CH
• Im HY
• Kim SY
• Ryu JY
• Yeom HY
• Kim HM

• KMID: 1430501
• DOI: http://doi.org/10.5125/jkaoms.2013.39.2.94

Abstract

Focal osteoporotic bone marrow defect (FOBMD) is a radiolucent area corresponding to the presence of hematopoietic tissue rarely found in the jaws. FOBMD is most commonly located in the mandibular edentulous posterior area of a middle-aged female. From November 2011 to November 2012, we experienced three cases involving removal of implants that had accidentally fallen into the FOBMD area. All patients happened to be female, with a mean age of 54 years (range: 51-60 years). One case involved hypoesthesia of the lower lip and chin, while two cases healed without any complication. Displacement of an implant into the FOBMD area is an unusual event, which occurs rarely during placement of a dental fixture. The purpose of this study was to report on three cases of FOBMD and to provide a review of related literature.

Keyword

Bone marrow; Defect; Displacement; Implant; Focal; Osteoporotic

MeSH Terms

Bone Marrow
Chin
Dental Implants
Displacement (Psychology)
Female
Humans
Hypesthesia
Jaw
Lip
Dental Implants

Figure

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  Fig. 1 A. Preoperative coronal (left) and sagittal (right) cone-beam computed tomography showing the displacement of the #46 implant near the mandibular border of case 1. B. Follow-up panorama taken 3 months after the removal operation indicates the resolution of the lesion on the #46 area.

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  Fig. 2 A. Preoperative panorama showing normal bone on the left mandibular body without any cystic lesion of case 2. B. Preoperative cone-beam computed tomography showing the displacement of #36 implant (left) near the inferior alveolar nerve and normal position of #37 implant (right) of case 2. C. Postoperative panoramic view of #36 implant removal surgery of case 2. D. Follow-up computed tomography taken 3 months after the removal operation indicates the resolution of the lesion of case 2. E. Follow-up panoramic view after the placement of # 36 implant of case 2.

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  Fig. 3 A. Preoperative cone-beam computed tomography view of the displacement of #36 implant (left) near the mandibular border area and normal bone state of #37 implant (right) of case 3. B. Preoperative panorama showing normal cancellous bone without any cystic lesion of case 3.

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