Successful implant dentistry mandates implants to be placed in an appropriate three-dimensional manner that supports the prosthesis adequately. Due to the resorption patterns of edentulous jaws, the ideal position of implants required... more
Successful implant dentistry mandates implants to be placed in an appropriate three-dimensional manner that supports the prosthesis adequately. Due to the resorption patterns of edentulous jaws, the ideal position of implants required varying amounts of bone augmentation. Commonly carried out bone-augmentation procedures are Guided Bone Regeneration, onlay bone grafting and sinus floor elevation. This chapter discusses the resorption pattern of edentulous jaws, the biology of alveolar bone of relevance to the maxillofacial surgeon, the biomaterials used for augmentation and the commonly carried out augmentation procedures.
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Over the past decades, implant dentistry has evolved to be a very predictable treatment modality for the replacement of lost teeth and has now become one of the most common oral surgical procedures carried out worldwide. This chapter... more
Over the past decades, implant dentistry has evolved to be a very predictable treatment modality for the replacement of lost teeth and has now become one of the most common oral surgical procedures carried out worldwide. This chapter introduces the history and evolution of dental implants, discusses the concept of osseointegration, mentions the types of implants and discusses clinical decision making and execution of straight forward implant placement. It must be noted that the field of implantology is rapidly developing with new treatment concepts and increasing use of digital technology. The surgical part of implant treatment although extremely important, is only a part of the overall treatment, the other important factors being the laboratory and prosthodontics. This chapter only provides a basic surgical overview of implantology for the beginner surgeon clinician.
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Background and PurposeOsteoporosis is a major skeletal disease affecting millions of people worldwide. Recent studies claim that patients with osteoporosis do not have a higher risk of early implant failure compared to non‐osteoporotic... more
Background and PurposeOsteoporosis is a major skeletal disease affecting millions of people worldwide. Recent studies claim that patients with osteoporosis do not have a higher risk of early implant failure compared to non‐osteoporotic patients. The aim of this study was to assess the effect of skeletal osteoporosis and local bone density on initial dental implant stability.Materials and MethodsSeventy‐three patients were recruited and were assigned (based on a Dual‐energy X‐ray Absorptiometry scan) to either the osteoporosis (Opr), osteopenia (Opn), or control (C) group. Forty nine of the 73 patients received dental implants and had implant stability measured by means of resonance frequency analysis (RFA) at implant placement and at prosthetic abutment placement. On the computerized tomography scans, the cortical thickness and the bone density (Hounsfield Units) at the sites of implant placement were measured.ResultsAt implant placement, primary stability was on average lower in gr...
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Immunoglobulin G4-related disease (IgG4-RD) is an immune-mediated fibroinflammatory condition that can affect multiple organs. IgG4-RD may show a variety of initial symptoms. In the oral mucosa, lesions present as inflammatory fibrosis... more
Immunoglobulin G4-related disease (IgG4-RD) is an immune-mediated fibroinflammatory condition that can affect multiple organs. IgG4-RD may show a variety of initial symptoms. In the oral mucosa, lesions present as inflammatory fibrosis with a large number of IgG4-positive plasma cells. Evaluating treatment is a well-known problem in IgG4-RD due to the absence of an established assessment system. There are difficulties in defining the severity of the disease, which is why treatment is primarily based on its clinical manifestations. We present a case report of localized IgG4-RD with ulcerative and proliferative manifestations on the tongue, which clinically mimicked oral squamous cell carcinoma. A tumor-like lesion on the tongue can indicate something else other than the malignant or reactive changes commonly found in the oral mucosa. Multiple differential diagnoses of these atypical oral lesions, including localized IgG4-RD, should be considered.
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Purpose The management of complex mandible fractures, i.e. severely comminuted or fractures of edentulous/atrophic mandibles, can be challenging. This is due to the three-dimensional loss of bone, which limits the possibility for accurate... more
Purpose The management of complex mandible fractures, i.e. severely comminuted or fractures of edentulous/atrophic mandibles, can be challenging. This is due to the three-dimensional loss of bone, which limits the possibility for accurate anatomic reduction. Virtual surgery planning (VSP) can provide improved accuracy and shorter operating times, but is often not employed for trauma cases because of time constraints and complex user interfaces limited to two-dimensional interaction with three-dimensional data. Methods In this study, we evaluate the accuracy, precision, and time efficiency of the haptic assisted surgery planning system (HASP), an in-house VSP system that supports stereo graphics, six degrees-of-freedom input, and haptics to improve the surgical planning. Three operators performed planning in HASP on computed tomography (CT) and cone beam computed tomography (CBCT) images of a plastic skull model and on twelve retrospective cases with complex mandible fractures. Resul...
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Research Interests: Dentistry, Osseointegration, Vibration, Dental Implants, Medicine, and 13 moreTibia, Female, Animals, Fluorides, Clinical Sciences, Implant, Time Factors, Surface Properties, Dental Prosthesis Design, ORAL AND CRANIO-MAXILLOFACIAL PLASTIC SURGERY, Rabbits, Random Allocation, and Bone Transplantation
We present a case where a patient sustained a tympanic plate fracture of the right side while chewing a sandwich. Intense pain with temporomandibular joint (TMJ) symptoms such as restrained painful mouth opening and functional pain in... more
We present a case where a patient sustained a tympanic plate fracture of the right side while chewing a sandwich. Intense pain with temporomandibular joint (TMJ) symptoms such as restrained painful mouth opening and functional pain in full occlusion followed the incident and the fracture was diagnosed after ocular and CT-examination of the right external auditory canal. Non-ruptured soft tissue could be seen protruding into the external auditory canal and the size of the mass changed during movement of the TMJ. Treatment was not needed to resolve the situation and at 3-year follow-up the patient has no clinical symptoms.
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Extensive atrophy of the alveolar process may require a bone-grafting procedure prior to implant treatment. Autogenous bone grafts from the iliac crest, used as onlay block and particulate bone, have been used together with sinus-lift... more
Extensive atrophy of the alveolar process may require a bone-grafting procedure prior to implant treatment. Autogenous bone grafts from the iliac crest, used as onlay block and particulate bone, have been used together with sinus-lift procedure in order to rehabilitate patients with extremely resorbed maxillae. However, there are to our knowledge no 5-year follow-up studies evaluating the extent of bone-level change in patients treated with respectively block and particulate autogenous bone grafts. The purpose of this prospective clinical study was to conduct a 5-year follow-up analysis with focus on bone-level alteration in block versus particulate onlay bone grafts. Fifteen out of originally 19 patients who were treated with iliac bone grafts and oral implants in the maxilla have been followed through the first 5 postoperative years. In a first study conducted on 19 patients, the role of platelet-rich plasma in conjunction with autogenous bone was evaluated. In this 5-year follow-up study, the marginal bone alterations have been documented at base line, 1 year and 5 years of loading to the nearest 0,1 mm at mesial and distal surfaces of the implants. Two implants were installed on each side of the midline in either block or particulate bone grafts giving test and control sides in each patient. Additionally, two implants on each side were installed in residual bone/grafted sinus floor. Marginal bone alteration in the anterior maxilla appeared larger at the side augmented by block bone at baseline, and after 1 and 5 years of loading, but the change was not statistically significant. Moreover, there was a significantly higher degree of marginal alteration during the first year of loading, compared with the examinations after 5 years. The present follow-up study showed that there is no significant difference in the extension of resorption between block- and particulate autogenous bone grafts over a 5-year period. Most of the resorption occurred during the first year in function.
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Our aim was to evaluate the treatment given to patients with intraosseus ameloblastomas with special emphasis on recurrence and the outcomes of primary and secondary resection. Forty-eight patients who were treated for intraosseous... more
Our aim was to evaluate the treatment given to patients with intraosseus ameloblastomas with special emphasis on recurrence and the outcomes of primary and secondary resection. Forty-eight patients who were treated for intraosseous ameloblastoma at 8 centres across Sweden met the inclusion criteria. They showed typical distribution of age, sex, site of lesion, and characteristic presenting features. Eleven of the 48 were initially treated with radical resection and none recurred. Twenty-two of the remaining 37 who were initially treated by conservative resection presented with recurrences. Sixteen of the 22 then had conservative secondary resections, which resulted in further recurrence in 6 patients. Initial radical resection is therefore superior to conservative management as far as recurrences are concerned. We argue, however, that a conservative surgical approach is adequate for many intraosseous ameloblastomas with limited extension, because relapse can be followed by radical resection if clinically indicated in selected cases.
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With the increasing use of three-dimensional (3D) models and Computer Aided Design (CAD) in the medical domain, virtual surgical planning is now frequently used. Most of the current solutions focus on bone surgical operations. However,... more
With the increasing use of three-dimensional (3D) models and Computer Aided Design (CAD) in the medical domain, virtual surgical planning is now frequently used. Most of the current solutions focus on bone surgical operations. However, for head and neck oncologic resection, soft tissue ablation and reconstruction are common operations. In this paper, we propose a method to provide a fast and efficient estimation of shape and dimensions of soft tissue resections. Our approach takes advantage of a simple sketch-based interface which allows the user to paint the contour of the resection on a patient specific 3D model reconstructed from a computed tomography (CT) scan. The volume is then virtually cut and carved following this pattern. From the outline of the resection defined on the skin surface as a closed curve, we can identify which areas of the skin are inside or outside this shape. We then use distance transforms to identify the soft tissue voxels which are closer from the inside ...
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Background: Oral squamous cell carcinoma is the main malignancy of the oral cavity; floor of the mouth and the lateral border of the tongue being the most affected sites. This kind of oral neoplasms may require mandibular resection and... more
Background: Oral squamous cell carcinoma is the main malignancy of the oral cavity; floor of the mouth and the lateral border of the tongue being the most affected sites. This kind of oral neoplasms may require mandibular resection and reconstruction. Treatment options for such mandibular defects include bone grafts, free flaps, and reconstruction plates. Today, the commonly used treatment method is vascularized fibula flaps due to its many advantages when compared to other methods. However, it is a complex procedure and demands much of both practitioners and the patient. Case Presentation: In this report, we present a case of oral squamous cell carcinoma of the gingiva of the mandible which was treated with a partial mandibulectomy and resection. Because of the patients age and fragility an immediate mandibular reconstruction with a pre-shaped reconstruction plate, without hard or soft tissue transfer, was performed. Yearly controls showed pleasing results both aesthetically and fu...
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A case of a blowout fracture with sever post traumatic emphysema is described in this study. The clinical presentation, diagnosis and management of orbital emphysema associated with blowout fractures are discussed, and the literature... more
A case of a blowout fracture with sever post traumatic emphysema is described in this study. The clinical presentation, diagnosis and management of orbital emphysema associated with blowout fractures are discussed, and the literature reviewed. This case highlights the importance of proper diagnostic measures and necessary treatment when dealing with orbital trauma patients. The clinical examination of motility, visual acuity and pupillary affect are primarily the most important factors of deciding suitable therapy. In an emergency, time is of the essence to reduce the risk of permanent vision loss.
Injuries to the larynx (voice box) can lead to loss of vital functions; the airway may be obstructed, the voice distorted or lost, and the protection of the airway during swallowing may fail. In order to preserve these functions, a stable... more
Injuries to the larynx (voice box) can lead to loss of vital functions; the airway may be obstructed, the voice distorted or lost, and the protection of the airway during swallowing may fail. In order to preserve these functions, a stable repair that restores the anatomy as closely as possible is needed. The repair should interfere minimally with the neuromuscular functions of the larynx. The case is described of a 59-year-old male who suffered a severe laryngeal fracture in a work-place accident. Utilizing miniplates, the fracture was reduced and fixed in the correct position. After healing, the patient could be decannulated and has regained his voice, swallows without difficulty and has a patent airway. The results have been sustained over a 2-year follow-up.
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To evaluate oral health related quality of life (OHQoL) in edentulous patients treated with immediately loaded implants in the maxilla. Fifty-one edentulous patients in two centers received six maxillary implants each were loaded within... more
To evaluate oral health related quality of life (OHQoL) in edentulous patients treated with immediately loaded implants in the maxilla. Fifty-one edentulous patients in two centers received six maxillary implants each were loaded within 24 h with provisional restoration. Definitive restoration was delivered 20-24 weeks later. OHQoL was evaluated preoperatively with the Oral Health Impact Profile 49 questionnaire (OHIP-49) and on five subsequent occasions. OHIP-49 includes seven domains representing functional limitation, physical pain, psychological discomfort, physical disability, psychological disability, social disability, and handicap. A reduction in OHIP scores indicated an improved OHQoL. Forty-five patients reached the three-year follow up. OHQoL improved after treatment. A plateau of OHQoL improvement was observed at 12 months after surgery. The seven domains improved at different pace, 12 weeks to 12 months after treatment. OHIP showed continuously low scores with no signif...
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Several studies have evaluated accuracy of intraoral scanners (IOS), but data is lacking regarding variations between IOS systems in the depiction of the critical finish line and the finish line accuracy. The aim of this study was to... more
Several studies have evaluated accuracy of intraoral scanners (IOS), but data is lacking regarding variations between IOS systems in the depiction of the critical finish line and the finish line accuracy. The aim of this study was to analyze the level of finish line distinctness (FLD), and finish line accuracy (FLA), in 7 intraoral scanners (IOS) and one conventional impression (IMPR). Furthermore, to assess parameters of resolution, tessellation, topography, and color. A dental model with a crown preparation including supra and subgingival finish line was reference-scanned with an industrial scanner (ATOS), and scanned with seven IOS: 3M, CS3500 and CS3600, DWIO, Omnicam, Planscan and Trios. An IMPR was taken and poured, and the model was scanned with a laboratory scanner. The ATOS scan was cropped at finish line and best-fit aligned for 3D Compare Analysis (Geomagic). Accuracy was visualized, and descriptive analysis was performed. All IOS, except Planscan, had comparable overall ...
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Temporomandibular joint replacement (TJR) with alloplastic prosthesis has shown promising long-term results in end stage joint disorders. We present a case of young woman with painful ankylosis that where reconstructed with TJR, due to a... more
Temporomandibular joint replacement (TJR) with alloplastic prosthesis has shown promising long-term results in end stage joint disorders. We present a case of young woman with painful ankylosis that where reconstructed with TJR, due to a complex mandibular fracture with dislocation of the left condyle into the middle cranial fossa two years earlier. At the age of 18 the subject underwent a total joint replacement with custom-made alloplastic TMJ prosthesis. To determine the bone response and remodeling activity around the prosthesis, a F18 PET/CT-scan was used. No sign of increased remodeling or pathology were seen in the imaging after the reconstruction. Four years postoperatively the subject reports no pain and excellent jaw function.
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This paper describes the course of treatment of a severely diplaced bilateral mandibular body fracture, where the first osteosynthesis failed. The subject developed an open bite due to a posterior rotation of the distal part of the... more
This paper describes the course of treatment of a severely diplaced bilateral mandibular body fracture, where the first osteosynthesis failed. The subject developed an open bite due to a posterior rotation of the distal part of the mandible and anterior rotation of the proximal parts of the mandible. This situation was evaluated with CBCT and the facial skeleton was segmented using computer software. Correct occlusion was virtually established by bilateral virtual osteotomies in the fracture areas of the mandible. After segmentation, the mandible was virtually rotated back into position and the open bite was closed. A patient specific mandibular reconstruction plate was outlined and fabricated from the new virtual situation and the plate was thereafter installed utilizing the preoperative plan. Osteotomy- and drill-guides was used and thus simplified the surgery resulting in uneventful healing. Virtual planning and patient specific implants and guides were valuable in this case of s...
Various augmentation procedures involving the maxillary sinus, using bone substitutes or bone, have been used to enhance bone support for dental implants. The aim of this study was to retrospectively evaluate the status of implants in... more
Various augmentation procedures involving the maxillary sinus, using bone substitutes or bone, have been used to enhance bone support for dental implants. The aim of this study was to retrospectively evaluate the status of implants in patients who had undergone a maxillary sinus lift and immediate implant placement without the addition of graft material. Nineteen patients who had required bone augmentation of their maxillary sinus floor were evaluated in this study. After a bone window in the lateral wall of the sinus has been prepared and the Schneiderian membrane had been carefully elevated, dental implants were inserted in the residual bone, creating a membrane elevation. Resorbable collagenous membrane was used to seal the lateral access window of the maxillary sinus after implant placement. Clinical and radiological follow-up was carried out up to 40 months after implant installation. A total of 28 implants in lengths of 10 and 12 mm were placed in a one-stage healing protocol, with an average residual bone height of 5.25 mm (SD = 1.48). All implants remained stable, with a survival rate of 100%. An increase in mean bone height of 4.75 mm (SD = 1.13) was gained. The marginal bone levels relative to the coronal aspect of the implant shoulder exhibited a mean change of 1.01 mm (SD = 0.49) from the baseline. Of the 19 patients, none showed a plaque index or gingival index greater than 2, and 14 patients showed no presence of plaque. The findings of the study regarding the immediate placement of implants without the use of bone grafts or other bone substitute materials demonstrate a successful approach for new bone formation around implants in the posterior part of the maxilla, when the preoperative height of the subantral bone is moderate and enough to achieve primary stability.
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Erdheim-Chester disease presenting as periodontal disease : Experience of treatment with cladribine, interferon-a, local radiotherapy and anakinra
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The literature suggests that predictable integration can be achieved when dental implant placement is combined with immediate fixed provisional restoration in a variety of clinical situations. Fewer data are available, however, regarding... more
The literature suggests that predictable integration can be achieved when dental implant placement is combined with immediate fixed provisional restoration in a variety of clinical situations. Fewer data are available, however, regarding outcomes for immediate provisional restoration of implants in the edentulous maxilla. This report presents 1-year data acquired from a long-term prospective clinical trial designed to assess outcomes following the immediate provisional fixed restoration of implants in the atrophic edentulous maxilla without the use of bone augmentation. Fifty-one subjects diagnosed with an atrophic edentulous maxilla received a total of 306 implants (six implants per subject) followed by fixed provisional restoration within 24 hours of implant placement. No subjects underwent grafting to enhance bone volume in preparation for implant treatment. Data acquired included bone quantity and quality, implant dimensions, implant locations, and implant placement stability. S...
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Immediate loading of implants in the edentulous maxilla has previously been successfully performed and reported. Severe resorption of the maxillary alveolar crest presents a more demanding situation for the restorative team. Thus, it... more
Immediate loading of implants in the edentulous maxilla has previously been successfully performed and reported. Severe resorption of the maxillary alveolar crest presents a more demanding situation for the restorative team. Thus, it would be valuable to assess outcomes for this immediate loading treatment protocol in subjects with marked maxillary alveolar crest atrophy. This study evaluated the 3-year results of dental implants that were immediately restored with provisional fixed prostheses in atrophic maxillae without previous augmentation. Two centers enrolled subjects with resorbed edentulous maxillae (Lekholm and Zarb quality 3 or 4 and quantity C, D, or E). Six implants were placed in each subject and restored with screw-retained fixed provisionals within 24 hours. Impressions were taken for definitive restorations, which were placed 20 to 24 weeks later. Radiographs were used to analyze marginal bone level changes throughout the study. Fifty-one patients received 306 implan...
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A regenerative procedure treating a local osseous defect around titanium dental implant using porous titanium granules is described in four patients. Porous titanium granules represent, for maxillofacial surgery, a new alternative in... more
A regenerative procedure treating a local osseous defect around titanium dental implant using porous titanium granules is described in four patients. Porous titanium granules represent, for maxillofacial surgery, a new alternative in augmenting osseous defects. Its earliest application was in the field of orthopedics for stabilization of tibia plateau fractures and for reoperations in prosthetic fixation of femoral stems. There is emerging scientific evidence regarding titanium for its potential use in the maxillofacial area and porous titanium granules are now commercially available. The scientific background for the osteoconductive use of porous titanium granules is elucidated in this paper and the supporting literature is reviewed.
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By preserving the temporomandibular joint (TMJ) disc in the glenoid fossa at the time of resection, correctly securing the vascularised fibular end in the fossa, and by reattaching the lateral pterygoid muscle, it is possible to maintain... more
By preserving the temporomandibular joint (TMJ) disc in the glenoid fossa at the time of resection, correctly securing the vascularised fibular end in the fossa, and by reattaching the lateral pterygoid muscle, it is possible to maintain normal rotation, translatation, and protrusion in the TMJ and the function of the jaw can be totally restored. We describe four patients in whom good function was achieved in three; this is underlined by extensive remodelling of the condylar head seen at radiological follow-up up to 36 months.
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A 23-year-old woman was presented with a prolonged history of a small lump in the buccal mucosa. A local excision was performed. The morphology diagnosed a Spitz nevus and she underwent supplementary excision of scar tissue. Two years... more
A 23-year-old woman was presented with a prolonged history of a small lump in the buccal mucosa. A local excision was performed. The morphology diagnosed a Spitz nevus and she underwent supplementary excision of scar tissue. Two years later a submandibular lump appeared on the ipsilateral side of the neck. Cytology from fine needle aspiration indicated spread of a melanocytic tumor and she underwent a modified supraomohyiod neck dissection. One of the lymph nodes showed an inclusion of cells in the deep layers with epitheloid and spindle cells in a pattern similar to that of the primary oral lesion. The finding suggests a mechanical spread of melanocytes from the Spitz nevus to the regional lymph node. After more than 3 years of follow-up there is no further manifestation of disease. It is believed that this may be an example of how a Spitz tumor, although inherently benign, can spread along lymphatics in a pseudometastatic fashion. To our knowledge this is the first report of an oral Spitz melanoma with metastatic behavior.
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Background. Long-term edentulism may in many cases result in resorption of the alveolar process. The sinus lift procedure aims to create increased bone volume in the maxillary sinus in order to enable installation of dental implants in... more
Background. Long-term edentulism may in many cases result in resorption of the alveolar process. The sinus lift procedure aims to create increased bone volume in the maxillary sinus in order to enable installation of dental implants in the region. The method is over 30 years old, and initially autogenous bone grafts were used and later also different bone substitutes. Since 1997, a limited number of studies have explored the possibility of a graftless procedure where the void under the sinus membrane is filled with a blood clot that enables bone formation.Aim. To describe the evolution of the sinus-lift technique and to review the literature related to the technique with a focus on long-term studies related to the graft-less technique.Methods. The electronic database PubMed was searched, and a systematic review was conducted regarding relevant articles.Results. A relatively few long-term studies using the described technique were found. However, the technique was described as reliab...
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Autogenous bone, with its osteogenic, osteoinductive and osteoconductive properties, has long been considered the ideal grafting material in bone reconstructive surgery (26, 85). However, drawbacks ...
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Research Interests: Dentistry, Treatment Outcome, Medicine, Bone graft, Humans, and 15 moreChronic Disease, Female, Plasma, Recurrence, Ilium, Platelet Rich Plasma, Adult, Odontogenic Cysts, Osteogenesis distraction, Elsevier, Salivary Gland Diseases, Bone Transplantation, Blood platelets, Platelet transfusion, and Reconstructive Surgical Procedures
Reconstruction of the temperomandibular joint with free fibula microvascular flaps without and with surgical guides
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Complete intrusion of a primary anterior tooth may initially be diagnosed as an avulsion injury. The importance of a correct first clinical and radiological examination of a young patient who has sustained trauma to the anterior primary... more
Complete intrusion of a primary anterior tooth may initially be diagnosed as an avulsion injury. The importance of a correct first clinical and radiological examination of a young patient who has sustained trauma to the anterior primary teeth is stressed in this article. This issue is illustrated by a case presentation where a 3-year-old girl had a delayed treatment of 5 days after a primary incisor was fully impacted by a fall trauma into the nasal cavity. This was due to an incomprehensible clinical and radiological examination by the first examining dentist. The impacted tooth was later removed through the right nostril under general anesthesia. Two-year follow-up showed no adverse clinical or radiological problems even though eruption of the permanent successor had not taken place at that time.
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Surface modifications of dental implants have gained attention during several years and the thrombotic response from blood components with these materials has become more important during recent years. The aims of this study were to... more
Surface modifications of dental implants have gained attention during several years and the thrombotic response from blood components with these materials has become more important during recent years. The aims of this study were to evaluate the thrombogenic response of whole blood, in contact with clinically used dental surfaces, Sandblasted Large grit Acid etched titanium (SLA) and Sandblasted Large grit Acid etched, and chemically modified titanium with hydrophilic properties (SLActive). An in vitro slide chamber model, furnished with heparin, was used in which whole blood came in contact with slides of the test surfaces. After incubation (60-minute rotation at 22 rpm in a 37°C water bath), blood was mixed with ethylenediaminetetraacetic acid (EDTA) or citrate, further centrifuged at +4°C. Finally, plasma was collected pending analysis. Whole blood in contact with surfaces resulted in significantly higher binding of platelets to the hydrophilic surface, accompanied by a significant increase of contact activation of the coagulation cascade. In addition, the platelet activation showed a similar pattern with a significant elevated release of β-TG from platelet granule. The conclusion that can be drawn from the results in our study is that the hydrophilic modification seems to augment the thrombogenic properties of titanium with implications for healing into bone of, that is titanium dental implants.
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A delayed approach is recommended for reconstruction of the jaws with autogenous bone grafts and dental implants. Experimental studies have shown stronger bone tissue responses to surface modified implants than to nonmodified ones. The... more
A delayed approach is recommended for reconstruction of the jaws with autogenous bone grafts and dental implants. Experimental studies have shown stronger bone tissue responses to surface modified implants than to nonmodified ones. The aim of the study was to evaluate bone integration and stability of surface modified and fluoridated implants when placed with fresh or healed autogenous bone grafts. Six rabbits were used in this study. Each right rabbit tibia (control) received an autogenous bone graft, harvested from the calvarium. Eight weeks later, a second graft was harvested from the other side of the calvarium and placed on the left tibia (test) with an implant. Another implant was installed in the healed graft of the right tibia. TiO2 -blasted and fluoridated OsseoSpeed(TM) implants (Astra Tech AB, Mölndal, Sweden), 3.5 mm in diameter and 9 mm long, were used. After additional 8 weeks, the rabbits were sacrificed and the implants were removed en bloc for light-microscopic analysis. Bone-to-implant contact (BIC) was registered as well as the amount of bone filling a rectangle indicating a region of interest (ROI). Resonance frequency analysis (RFA) was conducted both at the time of surgery and at the end of the experiment. There were no statistically significant differences either in BIC or ROI between the test and control sides. RFA showed higher implant stability for the control side at the time of the surgery, but the difference had leveled out at the time of the sacrifice. The present study showed similar bone tissue responses and stability for surface modified and fluoridated implants after 8 weeks of healing in fresh or healed autogenous bone grafts.
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Research Interests: Dentistry, Osseointegration, Dental Implants, Medicine, Cephalometry, and 14 moreHumans, Female, Three Dimensional Imaging, Follow-up studies, Clinical Sciences, Platelet Rich Plasma, Atrophy, ORAL AND CRANIO-MAXILLOFACIAL PLASTIC SURGERY, X ray Computed Tomography, Bone Resorption, Sinus Floor Augmentation, Bone Transplantation, Alveolar bone loss, and Reconstructive Surgical Procedures
It is also possible that your web browser is not configured or not able to display style sheets. In this case, although the visual presentation will be degraded, the site should continue to be functional. We recommend using the latest... more
It is also possible that your web browser is not configured or not able to display style sheets. In this case, although the visual presentation will be degraded, the site should continue to be functional. We recommend using the latest version of Microsoft or Mozilla web browser to ...