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- Eeg-Olofsson, Måns, 1967, et al.
(författare)
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Implications for contralateral bone-conducted transmission as measured by cochlear vibrations.
- 2011
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Ingår i: Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology. - : LWW. - 1537-4505 .- 1531-7129. ; 32:2, s. 192-8
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Tidskriftsartikel (refereegranskat)abstract
- The velocity response at the contralateral cochlea from bone-conducted (BC) stimulation depends on the stimulation position.
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| 3. |
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| 4. |
- Granström, Gösta, 1950, et al.
(författare)
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Imaging of osseointegrated implants in the temporal bone by accuitomo 3-dimensional cone beam computed tomography.
- 2011
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Ingår i: Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology. - 1537-4505. ; 32:2, s. 199-203
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Tidskriftsartikel (refereegranskat)abstract
- Follow-ups of osseointegrated implants in the temporal bone have been limited to clinical stability and resonance frequency measurements. Standard computed tomographic scanning is restricted because of the high radiation doses to the brain and the presence of disturbing metal artifacts. The present study was undertaken to evaluate the use of cone beam computed tomography preoperatively and postoperatively.
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| 5. |
- Granström, Gösta, 1950, et al.
(författare)
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Sleeping implant in the temporal bone: report of a case with 20-year follow-up.
- 2012
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Ingår i: Clinical implant dentistry and related research. - : Wiley. - 1708-8208 .- 1523-0899. ; 14:2, s. 236-40
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Tidskriftsartikel (refereegranskat)abstract
- Background: There is limited knowledge of the long-term fate of “sleeping” or nonloaded implants in the temporal bone. Purpose: This article describes the fate of a fixture installed in the temporal bone that remained unloaded for 20 years. Patient and Methods: A 25-year-old male with hemifacial microsomia had three osseointegrated implants installed for an auricular episthesis and bone-anchored hearing aid (BAHA) in the left temporal bone in 1988. Two of the implants for the ear episthesis were activated the same year, but the fixture for the hearing aid was not uncovered until 2008. When the patient experienced hearing problems at his office, he wanted to reactivate the sleeping implant. An audiogram showed a maximum conductive hearing loss with good preserved cochlear function. Before reactivation, an Accuitomo three-dimensional, cone beam computed tomography was performed. Resonance frequency analysis (RFA) using the Ostell technique was done when the implant was uncovered. Results: Preoperative x-ray investigation showed the sleeping implant to be well integrated in the temporal bone, covered with 1 mm bone, and with no signs of resorption. Geometric measurements correlating to the two loaded implants showed the sleeping implant to be positioned too close to these to be able to anchor a BAHA without interference with the episthesis. Surgical exploration was done to analyze the implant. The clinical status correlated well to that diagnosed from the x-ray investigation. RFA revealed the implant to be well integrated. A new fixture and abutment for BAHA was installed in the temporal line and activated 2 months after surgery. The patient is today supplied with a BAHA. Conclusion: It seems possible to use sleeping implants in the temporal bone even 20 years after installation.
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| 6. |
- Gumieiro, Emne Hammoud, et al.
(författare)
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Platelet-rich plasma in bone repair of irradiated tibiae of Wistar rats.
- 2010
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Ingår i: Acta cirúrgica brasileira. - 1678-2674. ; 25:3, s. 257-263
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: To evaluate the influence of PRP addition on bone repair of circular defects created in irradiated tibiae of rats by histometric analysis. METHODS: Sixty male Wistar rats had the right tibiae irradiated with 30 Gy. After 30 days monocortical defects were created and platelet-rich plasma was applied in 30 rats. In the control group defects were created but not filled. The animals were desanguinated after 4, 7, 14, 21, 56 and 84 days and the tibiae removed for histological processing. RESULTS: There was a tendency in the PRP group to increased bone neoformation from 14-days to 84-days; in the control group increased bone neoformation was not seen after 21 days or later. CONCLUSION: The addition of platelet-rich plasma had a beneficial effect in the initial cellular regeneration period and enhanced bone formation in later periods when compared to control.
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| 7. |
- Håkansson, Bo, 1953, et al.
(författare)
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A novel bone conduction implant (BCI): engineering aspects and pre-clinical studies.
- 2010
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Ingår i: International journal of audiology. - : Informa UK Limited. - 1499-2027 .- 1708-8186. ; 49:3, s. 203-15
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Tidskriftsartikel (refereegranskat)abstract
- Percutaneous bone anchored hearing aids (BAHA) are today an important rehabilitation alternative for patients suffering from conductive or mixed hearing loss. Despite their success they are associated with drawbacks such as skin infections, accidental or spontaneous loss of the bone implant, and patient refusal for treatment due to stigma. A novel bone conduction implant (BCI) system has been proposed as an alternative to the BAHA system because it leaves the skin intact. Such a BCI system has now been developed and the encapsulated transducer uses a non-screw attachment to a hollow recess of the lateral portion of the temporal bone. The aim of this study is to describe the basic engineering principals and some preclinical results obtained with the new BCI system. Laser Doppler vibrometer measurements on three cadaver heads show that the new BCI system produces 0-10 dB higher maximum output acceleration level at the ipsilateral promontory relative to conventional ear-level BAHA at speech frequencies. At the contralateral promontory the maximum output acceleration level was considerably lower for the BCI than for the BAHA.
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| 8. |
- Tjellström, Anders, 1937, et al.
(författare)
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The Bone Anchored Hearing Aid
- 2010
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Ingår i: Otology Japan. - 0917-2025. ; 20:1, s. 23-30
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Tidskriftsartikel (refereegranskat)abstract
- The Bone Anchored Hearing Aid - Baha® - is today a well establish treatment option in selected patients with hearing impairment. In this review article we will present the concept of osseointegration which is the prerequisite for the Baha®. The traditional indications are chronic ear disease, bilateral ear canal atresia, unilateral conductive hearing loss in only hearing ear and external ear canal problems that can not tolerate an air conduction hearing aid mould. Bilateral fitting and patient with single sided sensori neural deafness and Baha® in children will also be discussed. A short description of the surgical procedure is given. A extensive reference list will provide the interested reader with literature from colleagues experienced in the area of direct bone conduction via B Baha®.
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| 9. |
- Wallberg, E, et al.
(författare)
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Implant survival rate in bone-anchored hearing aid users: long-term results.
- 2011
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Ingår i: The Journal of laryngology and otology. - 1748-5460. ; 125, s. 1131-1135
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Tidskriftsartikel (refereegranskat)abstract
- Objective:To investigate the long-term survival rate of bone-anchored hearing aid implants, and to assess the number of patients who stop using their bone-anchored hearing aid.Method:Patients who underwent bone-anchored hearing aid surgery between September 1977 and December 1986 were identified from a prospective database. Data were collected from patient records.Results:During the study period, 143 patients were fitted with a bone-anchored hearing aid. Records from 132 patients were found, with a mean follow up of nine years. A total of 150 implants were installed in these patients. A total of 41 implants (27 per cent) were lost during follow up: 17 lost osseointegration, 16 were removed and eight were lost due to direct trauma. At the end of follow up, 119/132 (90 per cent) patients were still using their bone-anchored hearing aid.Conclusion:Despite a high incidence of implant loss over time, a large number of patients still continued to use their bone-anchored hearing aid.
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