Stability measurements of craniofacial implants by means of resonance frequency analysis. A clinical pilot study

Heo, Seong‐Joo; Sennerby, Lars; Odersjö, Marie; Granström, Gösta; Tjellström, Anders; Meredith, Neil

doi:10.1017/s0022215100141039

Cited by 41 publications

(32 citation statements)

References 10 publications

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“…Similar findings were reported in a study by Bolind et al [9]. Clinical noninvasive techniques can also be used to show increased osseointegration with time and also the possibility that deloading a virtually failing implant can regain osseointegration [21]. Yamanaka et al [22] investigated the removal torque of human craniofacial implants in relation to osseointegration time.…”

Section: Discussionsupporting

confidence: 61%

Microradiographic Study of Retrieved Craniofacial Osseointegrated Implants

Granström¹

1999

ORL

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In this study 18 screw-shaped extraoral osseointegrated implants retrieved from 10 patients were analyzed. The reasons for retrieval were: unexplained pain (n = 4); inability to cope with the implants (n = 2); fracture of the central screw (n = 2); skin penetration problems (n = 1), and trauma (n = 1). Retrieved implants were trephined with a border of surrounding bone, fixed, embedded in epon plastic, ground and processed for microradiography. The study group comprised 6 males and 4 females with a mean age of 53.4 (range 9–81) years. All implants were clinically stable at the time of removal, and the mean osseointegration time was 3 (range 1–5) years. Six implants were removed from the temporal bone, 5 from the frontal bone, and 7 from the maxilla. By microradiography, it was found that all retrieved implants were surrounded by a lamellar type of bone with haversian systems, vascular channels, osteocyte lacunae, and in some specimens regeneration and resorption areas. Bone metal contact was estimated to vary between 27 and 83%. Bone metal contact was lower in the frontal bone compared to the temporal bone or maxilla, and was further reduced after preoperative irradiation. Longer osseointegration time increased bone metal contact, as did increased age up to 60 years. It is concluded that extraoral osseointegrated implants in humans may integrate morphologically as well as clinically. By microradiography it was possible to define bone metal contact in the region of implant installation.

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Section: Discussionsupporting

confidence: 61%

Microradiographic Study of Retrieved Craniofacial Osseointegrated Implants

Granström¹

1999

ORL

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“…32,33 Bone quality is also a critical factor in implant placement. 34 Thus, craniofacial implant integration appears to be site-dependent (LE = 2b). 27,28 Differences in volume and density could result in irradiation having a more destructive effect on the vascularity of this site, thereby compromising the potential for osseointegration (LE = 2b).…”

Section: Success Rate and Clinical Outcomementioning

confidence: 99%

Bone-anchored titanium implants for auricular rehabilitation: case report and review of literature

et al. 2009

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CONTEXT AND OBJECTIVE: Osseointegrated implants have acquired an important role in the prosthetic rehabilitation of patients with craniofacial defects.The main indications are lack of local tissue for autogenous reconstruction, previous reconstruction failure and selection of this technique by the patient. This paper presents a clinical case and discusses indications and advantages of the osseointegrated implant technique for retention of auricular prostheses. TYPE OF STUDY: Case report, Universidade Federal de São Paulo (UNIFESP).METHODS: A female patient received three auricular implants after surgical resection of a hemangioma in her left ear. The time taken for osseointegration of the temporal bone was three months. After fabrication of the implant-retained auricular prosthesis, the patient was monitored for 12 months. RESULTS:The clinical parameters evaluated showed good postoperative healing, healthy peri-implant tissue, good hygiene and no loss of implants. Good hygiene combined with thin and immobile peri-implant soft tissues resulted in minimal complications. Craniofacial implant integration appears to be sitedependent; increasing age affects osseointegration in the temporal bone. The frequency of adverse skin reactions in peri-implant tissues is generally low. CONCLUSION:The surgical technique for rehabilitation using implant-retained auricular prostheses seems to be simple. It is associated with low rates of adverse skin reactions and long-term complications. Prostheses anchored by osseointegrated implants seem to provide better retention than do prostheses supported on spectacle frames, less risk of discoloration through the use of adhesives and better esthetic results than do prostheses anchored in the surgical cavity.RESUMO CONTEXTO E OBJETIVO: Os implantes osseointegrados adquiriram papel importante na reabilitação protética de pacientes com defeitos craniofaciais.As principais indicações são ausência local de tecidos para reconstrução autógena, falha anterior de reconstrução e opção do paciente. Este artigo apresenta um caso clínico e discute as indicações e vantagens da técnica de implantes osseointegrados para a retenção de próteses auriculares. TIPO DE ESTUDO E LOCAL: Relato de caso clínico, Universidade Federal de São Paulo (UNIFESP).MÉTODOS: Paciente do sexo feminino recebeu três implantes na região auricular após ressecção cirúrgica de hemangioma na orelha esquerda. O tempo de osseointegração no osso temporal foi de três meses. Após a confecção de prótese auricular implanto-suportada, a paciente foi observada por 12 meses. RESULTADOS:Os parâmetros clínicos analisados mostraram boa cicatrização pós-operatória, saúde dos tecidos adjacentes ao implante, boa higiene e nenhuma perda de implantes. A boa higiene combinada a pouca espessura e imobilidade dos tecidos moles perimplantares resulta em poucas complicações. A integração dos implantes craniofaciais parece variar conforme o local, e a idade avançada afeta a osseointegração no osso temporal. A frequência de reações adversas cutâneas...

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“…Hemocompatible nanomaterials can be used as scaffolds for various clinical devices, such as biosensors, dental devices, 1,2 craniofacial implants 3,4 and cardiovascular stents. 5,6 In all these cases, hemocompatibility and antimicrobial/anti-inflammatory properties of these devices are prime considerations.…”

Section: Introductionmentioning

confidence: 99%

Binding of plasma proteins to titanium dioxide nanotubes with different diameters

Kulkarni

Flašker

Lokar

et al. 2015

IJN

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Titanium and titanium alloys are considered to be one of the most applicable materials in medical devices because of their suitable properties, most importantly high corrosion resistance and the specific combination of strength with biocompatibility. In order to improve the biocompatibility of titanium surfaces, the current report initially focuses on specifying the topography of titanium dioxide (TiO 2 ) nanotubes (NTs) by electrochemical anodization. The zeta potential (ζ-potential) of NTs showed a negative value and confirmed the agreement between the measured and theoretically predicted dependence of ζ-potential on salt concentration, whereby the absolute value of ζ-potential diminished with increasing salt concentrations. We investigated binding of various plasma proteins with different sizes and charges using the bicinchoninic acid assay and immunofluorescence microscopy. Results showed effective and comparatively higher protein binding to NTs with 100 nm diameters (compared to 50 or 15 nm). We also showed a dose-dependent effect of serum amyloid A protein binding to NTs. These results and theoretical calculations of total available surface area for binding of proteins indicate that the largest surface area (also considering the NT lengths) is available for 100 nm NTs, with decreasing surface area for 50 and 15 nm NTs. These current investigations will have an impact on increasing the binding ability of biomedical devices in the body leading to increased durability of biomedical devices.

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Stability measurements of craniofacial implants by means of resonance frequency analysis. A clinical pilot study

Cited by 41 publications

References 10 publications

Microradiographic Study of Retrieved Craniofacial Osseointegrated Implants

Microradiographic Study of Retrieved Craniofacial Osseointegrated Implants

Bone-anchored titanium implants for auricular rehabilitation: case report and review of literature

Binding of plasma proteins to titanium dioxide nanotubes with different diameters

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