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Results for “Alveolar Ridge Augmentation”

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At least 55 records · Page 3Linked to original sources
PubMed2006

Utilization of mandibular tori for alveolar ridge augmentation and maxillary sinus lifting: a case report.

This article reports the utilization of mandibular tori as an alternative source of autogenous bone for ridge augmentation and maxillary sinus lifting to facilitate ideal implant placement. A patient presenting bilateral mandibular tori required replacement of a missing maxillary molar and a mandibular premolar. Both areas showed ridge deficiency that required bone augmentation before implant placement. Mandibular tori were used for horizontal augmentation of the mandibular alveolar ridge and vertical augmentation of the maxillary ridge by elevation of the maxillary sinus. Adequate new bone formation was noted in both areas 6 months after grafting. Bone formed in the grafted areas showed comparable clinical features to those of native bone. Implants were successfully placed and loaded, restoring esthetics and function. Within the limitations of this observation, mandibular tori can be successfully used for ridge augmentation and sinus lifting. However, further controlled studies are needed to determine the overall benefit of this source of autogenous bone.

Adult↗
PubMed2000

The use of a bone block graft from the chin for alveolar ridge augmentation.

Periodontal disease and tooth loss often leave the patient with an alveolar ridge that is less than adequate for endosseous implant placement. Alveolar bone grafting offers a clinically successful treatment option to regain all or some of this lost bone. This article describes the use of a bone block from the chin for the augmentation of the alveolar ridge. It relates the clinical techniques to the healing process in an effort to better understand the events involved.

Alveolar Ridge Augmentation↗
PubMed1991

[Long time results of the Sandwich-technique for mandibular alveolar ridge augmentation].

During six years twenty-five patients have been operated upon using a "sandwich technique" for mandibular alveolar ridge augmentation. This technique was advocated by Schettler in 1974. In 3 cases, autologous rib cartilage was used, in 20 Cases an autologous transplant from the iliar crest and in two cases, autologous "cialit" conserved bone chips were inserted. All transplants healed without complications and less resorption was found in all transplants at the late follow-up examinations.

Alveolar Ridge Augmentation↗
PubMedDate not supplied

Bone response to functioning implants in dog mandibular alveolar ridges augmented with distraction osteogenesis.

The specific aim of this study was to determine the response of alveolar bone after it was augmented vertically using distraction osteogenesis and subsequently loaded with implant restorations. Four dogs each had four implants placed horizontally into an edentulous mandibular quadrant and, after integration, a distraction osteogenesis device was fabricated in the laboratory. An osteotomy was made to allow the crest of the alveolar ridge to be distracted vertically. After 10 mm of vertical distraction, the device was stabilized with light cured resin. Following bone fill confirmation of the distraction gap at 10 weeks, two implants were placed into the ridges, one in distracted bone and one in nondistracted bone. After 4 months for implant integration, freestanding prostheses were fabricated. Crestal bone levels were evaluated throughout the period of function. Animals were sacrificed after 1 year of loading, for histologic evaluation of the bone. The vertical ridge augmentation averaged 8.85 +/- 1.05 mm after 10 weeks of healing following distraction, without change over 1 year of implant loading. Histologic examination showed that bone had formed between the distracted segments, creating an augmented ridge. The average thickness of the labial cortex in the distraction gap was significantly thinner than the lingual cortex in distracted bone and the lingual and labial nondistracted cortical bone. The presence of the dental implant did not significantly affect cortical bone thickness. Serial sections showed that implants remained integrated and functional without soft tissue inflammation. Dental implants placed into alveolar ridges augmented with the technique of distraction osteogenesis maintained bone and were functional for the length of this study.

Alveolar Ridge Augmentation↗
PubMed1996

[Alveolar ridge augmentation with hydroxylapatite. A clinical evaluation].

In a retrospective study on the effects of an absolute augmentation of the atrophic alveolar ridge with hydroxylapatite, the patient satisfaction rate with the present denture and the loss in height of the augmentation were assessed. Most patients indicated an improved functioning with their dentures after the operation; nevertheless, the patient satisfaction rate was lower than expected. Additionally a concerned loss in height of the augmentation was demonstrated over the evaluation period of 3.5 years. In selected cases, however, the hydroxylapatite augmentation of the atrophic alveolar ridge may still have its value in preprosthetic surgery.

Adult↗
PubMed1994

Titanium implant insertion into dog alveolar ridges augmented by allogenic material.

The purpose of this investigation was to evaluate whether titanium endosseous implants would osseointegrate in dog alveolar ridges augmented by allogenic material. In 8 dogs en bloc resection, including 2 pre-molars, was performed bilaterally in the maxilla and the mandible. After a healing period of 6 weeks allogenic, demineralized and lyophilized dentin or bone was implanted subperiosteally. Titanium implants were installed 5.5 months later in some of the regions. Light and fluorescence microscopic evaluation revealed fibrous encapsulation of the implanted allogenic material, no osteoinduction and only minimal osteoconduction, few multinuclear giant cells and a sparse inflammatory reaction. The titanium implants healed mainly by fibrous encapsulation.

Alveolar Process↗
PubMed2002

Alveolar ridge augmentation using a resorbable copolymer membrane and autogenous bone grafts. An experimental study in the rat.

The aim of the present study was to compare the result of maxillary alveolar ridge augmentation by the combined use of mandibular bone grafts and resorbable membranes (Resolut), with that achieved by the use of the same type of bone graft combined with the placement of e-PTFE membranes (Gore-Tex). The experiment was carried out in 30 rats. In one side of the maxillary jaw, the edentulous alveolar ridge between the incisor and the first molar was augmented by means of an autogenous mandibular bone graft that was fixed with a titanium microimplant and covered with a resorbable membrane. The contralateral side, serving as control, was treated in the same way, with the difference that an e-PTFE membrane was placed over the bone graft. Histological analysis at 15, 30, 60, 120 and 180 days after surgery demonstrated that, in both test and control sites where the membrane was properly adapted and not exposed, the bone grafts presented no resorption and were integrated into the maxillary bone at the recipient site. In cases where the membrane was exposed, however, the bone grafts presented extensive resorption and lack of continuity between the graft and the recipient bed. At 60-180 days after surgery, the exposure of both types of membrane had frequently led to complete resorption of the grafts, encapsulation of the titanium microimplant by fibrous connective tissue, or exfoliation of the microimplant. It is concluded that alveolar ridge augmentation can be predictably accomplished by combining mandibular bone grafting with the placement of resorbable or non-resorbable membranes according to the GTR principle, provided that the membrane is properly adapted over the graft and complete closure of the treated area is maintained during healing.

Absorbable Implants↗
PubMed1992

The effect of therapeutic radiation on canine alveolar ridges augmented with hydroxylapatite.

The purpose of this investigation was to evaluate the effect of radiation on hydroxylapatite (HA) implanted subperiosteally for alveolar ridge augmentation in dogs. All bicuspids and molars were extracted from 16 dogs. After 6 weeks, nonporous HA granules were implanted subperiosteally on the alveolar ridge. Following 4 months of healing, 12 dogs (experimental group) underwent therapeutic radiation therapy (Co60, 4,000 rad [40 Gy]) to the head and neck region. Four dogs were not irradiated and served as controls. Four animals (three experimental and one control) were killed at 5,6,7, and 8 months after HA augmentation. Light microscopic evaluation showed that approximately 25% of HA granules were encased by bone while the others were surrounded by fibrous connective tissue. Dissolution of the HA was observed. Microparticles of HA were phagocytized as part of a granulomatous inflammatory reaction. This reaction decreased significantly as time elapsed after implantation. Osteoclastic activity was seen at the junction of HA and periosteum and as part of bone remodeling. Dissolution of the HA granules and the granulomatous inflammatory reaction were not significantly increased by therapeutic radiation. The radiation did not cause development of dehiscence or osteonecrosis.

Alveolar Process↗
PubMed2002

Clinical results of alveolar ridge augmentation with mandibular block bone grafts in partially edentulous patients prior to implant placement.

A group of 15 partially edentulous patients who needed alveolar ridge augmentation for implant placement, were consecutively treated using a two-stage technique in an outpatient environment. A total of 18 alveolar segments were grafted. During the first operation bone blocks harvested from the mandibular ramus or symphysis were placed as lateral or vertical onlay grafts and fixed with titanium osteosynthesis screws after exposure of the deficient alveolar ridge. After 6 months of healing the flap was re-opened, the screws were removed and the implants placed. Twelve months after the first operation implant-supported fixed bridges could be provided to the patients. Mean lateral augmentation obtained at the time of bone grafting was 6.5 +/- 0.33 mm, that reduced during healing because of graft resorption to a mean of 5.0 +/- 0.23 mm. Mean vertical augmentation obtained in the 9 sites where it was needed was 3.4 +/- 0.66 mm at bone grafting and 2.2 +/- 0.66 mm at implant placement. Mean lateral and vertical augmentation decreased by 23.5% and 42%, respectively, during bone graft healing (before implant insertion). Mandibular sites showed a larger amount of bone graft resorption than maxillary sites. All the 40 implants placed were integrated at the abutment connection and after prosthetic loading (mean follow-up was 12 months). No major complications were recorded at donor or recipient sites. Soft tissue healing was uneventful, and pain and swelling were comparable to usual dentoalveolar procedures. A visible ecchymosis was present for 4 to 7 days when the bone was harvested from the mandibular symphysis. From a clinical point of view this procedure appears to be simple, safe and effective for treating localised alveolar ridge defects in partially edentulous patients.

Alveolar Ridge Augmentation↗
PubMed2002

Alveolar ridge augmentation by combining autogenous mandibular bone grafts and non-resorbable membranes.

The aim of the present study was to evaluate the effect of using mandibular cortical bone grafts covered with e-PTFE membranes for maxillary alveolar ridge augmentation, in comparison with the use of mandibular cortical grafts alone. The experiment was carried out in 20 rats. At one side of the maxillary jaw, the edentulous alveolar ridge between the incisor and the first molar was augmented by means of an autogenous mandibular bone graft, which was fixed with a titanium microimplant and covered with a Teflon membrane. The contralateral side, serving as control, was treated the same way, except for the placement of a membrane. Histological analysis at 15, 30, 60 and 90 days after surgery demonstrated that, in situations where the membrane was not exposed to the oral cavity during healing, the mandibular bone grafts presented no resorption and were in continuity with the maxillary bone at the recipient site. In situations where the membrane had become exposed, however, the bone grafts presented extensive resorption and lack of continuity with the bone at the recipient site. These latter findings were similar to those made at the non-membrane-treated side. The results indicate that the volume of autogenous bone graft used for alveolar ridge augmentation can be retained by covering the graft with a membrane, provided that the membrane is properly adapted and is kept covered with mucosa during healing.

Alveolar Ridge Augmentation↗
PubMedDate not supplied

[Alveolar ridge augmentation using moldable implants of granular hydroxylapatite and fibrin adhesive].

First results in the use of a hydroxyl apatite fibrin paste for alveolar ridge augmentation are reported. In the production of the moldable implants a fibrin mixture containing 1 i.u. Thrombin/ml is used as an absorbable biologic binder for the granules. The individual shape and situation of the graft is maintained throughout the resorption of the fibrin adhesive and the spread of connective tissue into the intergranular spaces, without any additional means of fixation required. Even under functional load, which starts after 6 weeks, the intergranular distance and the shape of the implants remains unchanged.

Alveolar Ridge Augmentation↗
PubMed2002

Simultaneous bimaxillary alveolar ridge augmentation by a single free fibular transfer: a case report.

Class VI atrophy according to Cawood still represents a major challenge in pre-prosthetic surgery. Reconstruction of mandibular and maxillary bony defects using microvascular techniques is safe and reliable. The fibula, due to its morphological properties, is ideal for alveolar ridge augmentation and its donor site morbidity is the lowest among vascularized bone flaps. In this paper, we report the first case, to our knowledge, of extreme atrophy of both jaws, successfully treated by simultaneous bony augmentation of the maxillary and mandibular alveolar ridges with just one free fibula flap. Pre-operative planning, surgical technique and prosthetic restoration are discussed in detail.

Alveolar Bone Loss↗
PubMed1987

Hydroxyapatite as a biomaterial for alveolar ridge augmentation.

Hydroxyapatite is a useful biomaterial because of its excellent biocompatibility. It is extremely well tolerated by the hard and soft tissues of the mouth and jaws, and offers great potential for the future. This paper reviews the various physical forms of the material, both solid and porous, its biological behaviour in different implant sites, and the surgical techniques for its implantation. Some of the controversies and doubts about the material are discussed in relation to its use in alveolar ridge augmentation.

Alveolar Ridge Augmentation↗
PubMed1980

Functional loading of bioceramic augmented alveolar ridge--a pilot study.

Two mongrel adult dogs were used in this study. The mandible was edentulated unilaterally and then augmented with porous tribasic calcium phosphate ceramic. To determine the effects of a denture over the augmented site, a unilateral distal-extension removable partial denture was constructed and inserted. At the end of the 6-month period, clinical evaluation revealed a healthy residual alveolar ridge tissue with no inflammatory reaction due to the implant. Histologic examination confirmed the clinical findings. There was no inflammation, bone and soft tissue grew into the pores, and no bone resorption occurred. It is concluded therefore that porous tribasic calcium phosphate ceramic is a potential material for residual alveolar ridge augmentation.

Alveolar Process↗
PubMed2001

Alveolar ridge augmentation with Bio-Oss: a histologic study in humans.

The aim of the present study was to investigate the healing of alveolar ridge defects augmented with cancellous bovine bone mineral. In six partially edentulous patients, bone augmentation was necessary prior to implant placement because of severe alveolar ridge resorption. The defect sites, all located in the maxilla, were filled with Bio-Oss and covered with the resorbable collagen membrane Bio-Gide. Biopsies were obtained from the defect sites 6 to 7 months following grafting and were processed for ground sectioning. The histologic analysis revealed that the Bio-Oss particles occupied 31% of the total biopsy area. An intimate contact between woven bone and Bio-Oss was detected along 37% of the particle surfaces. A mixed type of bone was found; it contained woven bone and parallel-fibered bone, which demonstrates features of remodeling activity. Signs of resorption of the grafting material were observed in the histologic sections, which indicates that the material takes part in the remodeling process. It is suggested that Bio-Oss may be a very suitable material for staged localized ridge augmentation in humans.

Adult↗