Bone Grafting Techniques Research Articles

Major clinical relevance and considerations of zygomatic implants in elderly patients: a systematic review

For decades, zygomatic implants (ZI) have been used to rehabilitate atrophic maxillae and reconstruct maxillary defects, demonstrating significant survival rates, and have emerged as an alternative to extensive bone grafting. Despite their efficacy, surgical techniques for ZI placement have consistently been associated with perioperative complications, with additional problems arising later, especially in elderly patients. Objective: The present study developed a systematic review to address the main clinical relevance and considerations of zygomatic implants in elderly patients. Methods: The present study followed a concise systematic review model. The search was carried out in the PubMed, Embase, Ovid, Cochrane Library, Web of Science, and Scopus databases. The quality of the studies was based on the GRADE instrument and the risk of bias was analyzed according to the Cochrane instrument. Results and Conclusion: A total of 220 articles were found. In total, 77 articles were fully evaluated and 57 were included and evaluated in this study, and of the total of 57 articles, only 42 articles were developed in the item results of the systematic review. Of the initial total of articles, 108 articles were excluded because they did not meet the GRADE and AMSTAR-2 classification, and 20 were excluded because they presented a risk of bias that could compromise the credibility of the studies. The symmetric funnel plot does not suggest a risk of bias. According to the GRADE instrument, most studies presented homogeneity in their results, with X2=85.6%>50%. It was concluded the ZI has a high rate of survival accumulated in 12 years, with the majority of failures occurring in the early stages of the postoperative period. The main complication observed related to zygomatic implants in elderly patients was sinusitis, which can appear several years after implantation surgery. The presence of increased maxillary sinus pneumatization with advanced resorption of the posterior alveolus may result in insufficient bone to anchor the implant. Bone augmentation is generally necessary under these conditions to allow the placement of a sufficient number and length of implants. Another more serious condition would be defects of maxillectomy, aplasia of the maxillary sinus, and cleft deformities. Zygomatic implants appear to be a consolidated therapeutic option for a significantly atrophic maxilla in elderly patients, offering a promising alternative to costly heavy bone graft techniques, fewer complications, less time for rehabilitation, less required prosthodontic work, and significantly higher survival rates.

Simultaneous Coronoid Bone Grafting in Ballistic Facial Trauma Patients Undergoing Coronoidectomy.

Ballistic facial trauma can cause complex fractures and overlying soft tissue damage, with a zone of injury that extends beyond the bullet tract. Early skeletal fixation is indicated, and previous large case series describe the use of debrided bone fragments as 'spare part' grafts. This series presents the indications and techniques for simultaneous coronoid bone grafting in 2 patients who sustained a gunshot wound to the right midface and required coronoidectomy. The coronoid process was used as (1) an interposition graft in the lateral buttress of the right maxilla for stability, and (2) an onlay graft on the right inferior orbital rim for contour. Both patients did not have graft infection, extrusion, or malposition at the 1-month clinic follow-up. The coronoid process of the mandible is a viable, safe spare-part option, despite the possible location of the coronoid process within the zone of injury in the reconstruction of complex ballistic facial trauma.

From Harvest to Healing: The Evolution of Bone Grafts In Oral Implantology

Bone grafts are surgical procedures that involve the transplantation of bone tissue to repair or reconstruct damaged bones. They are commonly used in various medical fields, including dentistry, orthopedics, and particularly within oral and maxillofacial surgery, prosthodontics, and oral radiology, to promote healing and support the integration of implants. This review embarks on a transformative journey through the evolution of bone grafting techniques in oral implantology, beginning with the rudimentary harvesting methods and their inherent limitations. It transitions to modern innovations, spotlighting synthetic and bioengineered materials that enhance biocompatibility and minimize patient morbidity. Key advancements in minimally invasive techniques and guided bone regeneration are meticulously examined, along with the revolutionary impact of 3D imaging and printing technologies on graft customization. The review underscores the synergy between biological principles and cutting-edge technology, illustrating how these breakthroughs not only lead to superior surgical outcomes but also foster improved patient healing and satisfaction. Ultimately, the evolution of bone grafts marks a significant paradigm shift towards more effective, patient-centered strategies in oral implantology. This exploration highlights the pivotal role of advanced bone grafting methods in bolstering osseointegration and ensuring overall implant success, showcasing a commitment to enhancing both clinical efficacy and patient experience for prosthodontists, periodontists, oral and maxillofacial surgeons,oral radiologists, and dentists alike.

Midterm Results of Severe Hip Dysplasia after Using a Cementless Acetabular Component with Bulk Bone Graft in Total Hip Arthroplasty: A Minimum Five-Year Follow-Up Study.

In patients with severe hip dysplasia, total hip arthroplasty (THA) using bulk bone graft (BBG) enhances anatomic cup positioning and provides early structural support. This study assesses the mid-term outcomes of THA with BBG in patients with over 50% graft bone coverage. Among 1951 patients who underwent THA between 2003 and 2007, 183 had BBG. After excluding early dropouts and infections, 151 patients remained. They were classified into uncovered (<50% coverage, 79 patients) and covered (>50% coverage, 72 patients) groups. The efficacy of cup fixation was compared between these groups. After ten years, the survival rate for not needing THA revision was 98% in the uncovered group and 100% in the covered group, while the rate for radiographic stability was 93% versus 99%, respectively. Although the cutoff value for the uncovered portion could not be clarified in this study, the mid-term results for 50% to approximately 70% uncovered were comparable to those for 50% or lesser, which have previously been expected to perform well. Recently, biomechanically advantageous bone grafting techniques have been identified, and based on the results of this study, it may be possible to expand the indications for THA with bone grafting for developmental dysplasia of the hip.

Application of autogenous block bone graft in the reconstruction of severe alveolar crest defect

Patients with severe alveolar ridge defects cannot be directly implanted and repaired, which seriously affects their quality of life. Onlay bone grafting is the main solution for severe alveolar ridge bone defect reconstruction, among which autogenous block bone grafting is the most widely used and is also the focus of clinical research on bone tissue reconstruction. This article expounds the characteristics and basic principles of autogenous bone block grafting, and comprehensively analyzes the selection of autogenous bone donor site, the principles of surgical operation, and the progress of bone graft techniques. In order to help surgeons make correct clinical decisions, increase the predictability of surgical effects, and improve the level of clinical diagnosis and treatment.

Evaluation of the Tensor Fascia Lata Muscle Pedicle Bone Grafting Technique in the Management of Avascular Necrosis of the Femoral Head: An Observational Clinical Study.

Osteonecrosis of the hip is defined as necrosis of the bone tissue due to some form of vascular insult, subsequently leading to the collapse of the femoral head and secondary osteoarthritis, which leads to pain and impaired joint function. This disease is widely known to affect middle-aged groups; however, in the Indian population, even younger people are more commonly affected. The disease has a debilitating effect on the activities of daily living (ADL) and the productivity of individuals and has financial consequences. With the increased utilization of magnetic resonance imaging (MRI) in society, the disease is diagnosed in its early stages. Hip-preserving surgery like tensor fascia lata (TFL) muscle pedicle iliac bone grafting should be given a chance to preserve the native femoral head. At a tertiary care teaching hospital in Gorakhpur, India, an observational clinical study was carried out. This study comprised 40 patients, ages 18-50 years, with femoral head osteonecrosis (stages II and III of the Ficat-Arlet staging system), who came to our institute's orthopedic outpatient department. Patients were treated with multiple drillings, curettage, and cheilectomy of the femoral head, in addition to TFL muscle pedicle bone grafting. The Harris hip score (HHS) was utilized to assess the clinical results, and the radiological assessment focused on signs of revascularization. In our study, the most prevalent age group was 20-30 years (67.5%), with a male predominance (85%). Among our cohort of 40 patients, the HHS indicated excellent outcomes (90-100) in 14 cases (35%), good outcomes (80-89) in 19 cases (47.5%), fair outcomes (70-79) in six cases (15%), and poor outcomes (<70) in one case (2.5%), at the time of the final follow-up. The final follow-up period varied from one to 10 years. TFL muscle pedicle bone grafting procedure provides excellent clinical and radiological outcomes, especially in young patients in whom femoral head-preserving surgery is preferred over total hip arthroplasty. This procedure is effective in both early and advanced stages of femoral head osteonecrosis, provided there are no arthritic changes. It reduces symptoms and improves functional outcomes.

Guided Bone Regeneration for the Treatment of Peri-Implantitis: Clinical Case Report

Periodontal disease is characterized as an inflammatory process that damages the periodontal lining and/or support tissues. Peri-implantitis is among the periodontal alterations, being caused by bacterial biofilm causing loss of underlying bone insertion, leading to modifications in its architecture that form intraosseous defects of various types. For the treatment of peri-implantitis there are non-surgical, surgical, resective, regenerative, combined techniques and the decision-making will depend on the degree of the bone defect. Therefore, guided bone regeneration (GBR) is an efficient and simple technique for bone augmentation, which is widely used to restructure bone defects that occur in the alveolar ridge and in the peri-implant region. Biomaterials are alternatives to be used in guided bone regeneration due to their excellent biocompatibility, osteoinductive properties, low degradation rate and their hydrophilicity, which collaborates with the absorption of blood cells and proteins that will help in osseointegration. Female, 58-year-old normosistemic patient, attended a private dental office complaining of pain, bad smell, bleeding and bad taste in the peri-implant region referring to element 25, on its distal face to the mesial face of the element tooth 26. After imaging exams, periodontal probing and the patient's past history, extraction of element 26 was performed, decontamination protocol of the implant surface of 25 through mechanical, chemical and physical means performing antimicrobial photodynamic therapy and finally, a guided bone regeneration was performed, using the allogeneic bone grafting technique associated with a polytetrafluoroethylene membrane in its expanded form (e-PTFE) for recovery of the bone defect and alveolar preservation. Thus, guided bone regeneration has shown high success rates and greater predictability when well indicated and performed, making it important for the maintenance of periodontal and peri-implant health.

The hybrid humerus reverse shoulder arthroplasty: a prospective study of bone grafting and metaphyseal fixation with undersized stem in the assessment of proximal humeral stress shielding and associated clinical outcome

BackgroundA significant proportion of revisions after reverse shoulder arthroplasty (RSA) is attributed to the humeral component. The purpose of this study is to evaluate the radiographic and clinical outcomes of the hybrid humerus technique for RSA using a Grammont-style humeral prosthesis in an onlay fashion with metaphyseal bone impaction grafting technique and undersized stem to avoid humeral stress shielding, notching, and loosening. MethodsThis is a prospective case series of patients who underwent RSA using the hybrid humerus technique with a minimum 2-year follow-up. Key steps of this technique include the use of undersized Grammont-style stem, impaction bone grafting of the proximal 5 cm of the humerus, and adjusting the height and offset of the stem depending on the patient stature, desired lateralization and distalization, and joint and soft tissue tension. Radiographic assessments were performed immediately after surgery, and at 1 and 2 years after surgery. These included assessment of metaphyseal and diaphyseal filling ratio, cortical narrowing, radiolucent lines, cortical lucencies, spot welding, scapular notching, and stem alignment. Preoperative and 2-year postoperative clinical assessments included American Shoulder and Elbow Surgeons score, Constant-Murley Score, University of California Los Angeles score, visual analog scale for pain, and active range of motion. Correlation between the filling ratios and clinical outcomes were also evaluated. ResultsSixty-one patients were included in the study. The average metaphyseal and diaphyseal filling ratio on the postoperative X-ray was 0.66 and 0.54, and 0.67 and 0.54 at 2 years, respectively. Stress shielding was graded as none in 24 (40.7%), mild in 33 (55.9%), and moderate in 2 (3.4%). No stem had a change in position of more than 5°. At 2 years of follow-up, no humeral implant loosening was noted, with only 2 (3.4%) of the stems at risk of loosening. Thirty-nine (66.1%) had no notching, 14 (23.7%) were graded as mild, and 6 (10.2%) had moderate signs of notching. All clinical assessments significantly improved at 2 years (P < .001), with a weak negative correlation between visual analog scale and metaphyseal filling ratio (r = −0.268, P = .036) but none between diaphyseal filling ratio and clinical outcomes. ConclusionThe hybrid humerus technique of metaphyseal bone grafting with a low filling ratio stem presents a promising solution for reducing humeral complications in RSA. This technique demonstrates a low incidence of stress shielding and loosening, with excellent clinical outcomes at 2 years.

The Role of Bone Grafting in Corrective Osteotomy of Distal Radius Malunions

Abstract Background It remains unclear whether bone grafting is required during corrective osteotomy of the distal radius. The goal of this systematic review is to determine the union, revision, and complication rates of bone grafting techniques associated with extra-articular corrective osteotomy for dorsally malunited distal radius fractures treated with volar plating. Questions Is bone grafting in distal radius corrective osteotomy associated with increased rates of bone union and reduced rates of revision surgery and complications? Methods A comprehensive search of the MEDLINE, Embase, and Cumulative Index to Nursing and Allied Health Literature databases was completed for studies reporting clinical outcomes of extra-articular corrective osteotomy for dorsally malunited distal radius fractures treated with volar plating. Results A total of 13 studies, with 14 intervention arms and 236 patients, were included. Bone grafting techniques consisted of autograft (6 studies, n = 93), synthetic bone grafts (2 studies, n = 38), allograft (1 study, n = 14), or no grafting (5 studies, n = 91). The overall union rate was 97%, and the mean time-to-union was 12.0 weeks. Larger corrections of dorsal tilt and ulnar variance were performed in the autograft and allograft groups. Complication and revision rates were highest in the synthetic group, 45 and 26.3% respectively. Conclusion Grafting in extra-articular corrective osteotomy for dorsally angulated distal radius malunions treated with volar plating is not associated with an improved union rate in the literature. However, larger corrections were achieved in both the autograft and allograft groups compared to the no-graft and synthetic groups, resulting in similar union rates. Synthetic bone grafting was associated with the highest complication and revision rates. Future comparative prospective trials and proper documentation of whether cortical contact was present or absent are required to assess whether bone grafting warrants consideration in more advanced deformities. Level of Evidence IV.

Management of Chondroblastoma in Pediatric Patients: 21 Years of Single-Center Experience.

Chondroblastoma (CB), a rare benign bone tumor that produces chondrocytes, often develops in the epiphysis or apophysis of children and young adults. The treatment of these rare tumors is complex. The standard treatment protocol involves curettage with local adjuvants and bone graft or cement application. The authors examined 38 CBs to determine risk factors for local recurrence, complications, and functional outcomes following epiphyseal curettage. Twenty-two girls and sixteen boys aged 10 to 17 years with histologically confirmed chondroblastoma who arrived at our hospital between January 2000 and June 2021 were reviewed retrospectively. Clinical data, radiographic images, histological results, treatment, functional outcomes, and the local recurrence rate were examined-surgical treatment involved total tumor curettage, followed by bone grafting and adjuvant techniques. Local recurrences have also been reported. The most frequently affected site was the proximal femur. Sites of involvement included the proximal femur in 10 (26.3%) cases, the proximal tibia in 8 (20.8%), the humerus in 5 cases (13.2%), the distal tibia in 4 cases (10.5%), the distal femur in 3 cases (7.9%), the supracetabular region in 3 cases (7.9%), the talus in 1 case (2.6%), the calcaneus in 1 case (2.6%), the scapula in 1 case (2.6%), the lumbar spine in 1 case (2.6%), and the iliac bone in 1 (2.6%) patient. The mean follow-up was 144.2 months (24 to 276). The local recurrence rate was 7.9%. The mean Musculoskeletal Tumor Society (MSTS) score was 28.3 points (17 to 30). The mean duration of symptoms at presentation was 5.8 (range, 1 to 28) months. Aggressive curettage and bone grafting resulted in local control and good outcomes in most pediatric patients. In a relatively small proportion of cases, long-term complications and recurrence can occur due to growth plate damage and late diagnosis. In patients admitted to the pediatric clinic with pain, which is often accompanied by localized edema and joint effusion, early detection via advanced radiological scans (X-ray, CT, or MRI) may prevent delays in diagnosis.

Zygomatic Implant Rehabilitation: A Prosthodontic Driven Approach: A Review

Zygoma implants, sometimes called zygomatic implants, are different from conventional dental implants in that they are affixed in the zygomatic bone, not the maxilla. They can be used in situations when there is not enough maxillary bone, either in terms of quantity or consistency, to support a dental implant. Insufficient maxillary bone volume may result from a combination of maxillary sinus pneumatization and bone resorption. To guarantee proper implant survival, the normal implant placement in the posterior maxilla requires a bone height of about 10 mm. Increased bone volume can be achieved by sinus elevation and bone grafting techniques in cases when there is insufficient bone available. The drawbacks of bone grafting procedures in the jaws include the need for prolonged care, restrictions on denture wear, morbidity at the donor surgical site, and graft rejection. Keywords: Zygomatic implants, Prosthodontic Rehabilitation, Prosthetically driven approach

Trephination-based autonomous robotic surgery for dental implant placement: A proof of concept

ObjectivesTo present a novel drilling protocol of trephine osteotomy technique for autologous bone grafting with simultaneous implant placement using an autonomous robotic system. MethodsThe novel protocol consists of 1) preoperative procedures: marker fabrication and fixation, data acquisition, and preoperative planning; 2) intraoperative procedures: registration and calibration, and osteotomy and implant placement performed by an autonomous dental implant robot; 3) postoperative procedures: CBCT acquisition and accuracy assessment. ResultThe protocol was an effective method for implant osteotomy, with no reported intraoperative complications. The implant surgery was successfully completed, and autogenous bone was obtained. Meanwhile, the accuracy of implant placement was clinically acceptable, with minor deviations. ConclusionsTrephination-based robotic surgery can be successfully implemented in implant osteotomy, which might replace freehand implant surgery and conventional drilling protocol. However, further clinical studies are necessary. Clinical significanceThe main finding of this case is a potential alternative for preserving autogenous bone during implant surgery.

Predicting the results of osteoplasty in oral surgery

The article presents the results of the outcomes analysis of osteoplasty in the rehabilitation of patients using dental implants, examines its various types and biological factors affecting the success of these operations. An attempt has been made to find possible solutions to the problem of bone insufficiency in the treatment of patients with missing teeth.The aim of the study is to study the results of various bone grafting techniques in patients in preparation for dental implantation and the success factors of this surgery.Materials and methods: the results of 281 osteoplasties were evaluated. The patients were divided into 4 groups according to the surgery technique performed: guided bone regeneration (GBR); bone block transplantation (BBT); open sinus-lifting (OSL); local bone modifying (LBM). Complications and results of these surgeries were evaluated.Results: significant and critical complications were more common in the operations of GBR (61.7% and 21.28%, respectively) and BBT (28.57%). After evaluating the outcomes of osteoplastic surgery, it was found that the acceptable result of OSL was 93.27%, LBM 88.43%; while we noted an unacceptable result during GBR in 76.59%, and BBT 57.14%. Complications in the form of non-critical reversible ones were more common during OSL (42.3%), however, significant and critical complications were detected after operations of GBR (61.7%) and BBT (28.57%). The results of the analysis of the outcomes of bone plastic surgery in the oral surgery indicate a significant percentage of unsuccessful outcomes of the GBR (76.59%) and BBT (57.14%).Conclusion: the study demonstrates the clinical value and effectiveness of various osteoplasties’ methods. In our opinion, outcomes and complications is associated, among other things, with a different factors, the main of which are the number of existing bone walls of the defect (atrophy), the volume of replacement, age and localization, which must be taken into account when predicting the results of this surgery.

INITIATION OF PROCESS STANDARDIZATION TO FABRICATE DEMINERALIZED BONE DIRECTED TOWARDS MAKING MATERIALS FOR BONE GRAFTING

Background: Bone tissue, a vital component for self-healing. This inherent regenerative capacity enables bones to repair themselves following injury or damage. Understanding the mechanisms behind bone tissue self-healing is of great significance in the field of medical research and has implications for the development of novel therapeutic approaches. In this article, we explore the fundamental characteristics and mechanisms underlying the self-healing properties of bone tissue. In certain instances of trauma or pathological conditions resulting in bone defects, the natural healing process may be insufficient. Consequently, the implementation of bone transplant interventions becomes imperative for successful bone regeneration. The predominant origins of bone grafts encompass autologous, homologous, and heterologous sources. The allograft, a widely utilized bone grafting technique, has gained significant popularity, and is currently in high demand within the medical field. The current state of allograft utilization in our nation has proven insufficient in meeting the demands of patients. Henceforth, a method has been devised and standardized for the procurement of demineralized osseous tissue, a crucial investigation in light of the insufficiency of allografts in meeting the requirements of patients. Objectives: Initially, standardizing an efficient procedure to obtain demineralized bone sources from human skull fragments from three different inclusion methods. Materials and Methods: Using three different types of solutions to obtain demineralized bone from human skull tissue including solutions of Formic Acid (10%), Hydrochloric Acid (5%), a mixture of solution: Formic Acid (10%) - Acid Hydrochloric (5%) (ratio 1:1,v/v). Demineralized bones were evaluated by comparing the mineral content extracted from bone samples, demineralization time, and analysis of ions concentration in bone samples (including Ca and P) before and after demineralization. Besides, demineralized bones were histologically stained before and after demineralization to assess the bone structure. Results: The Ca and P extraction rates of this method are high and standard, about 98% and 93%, respectively. The demineralization process only takes about five days. Relative bone tissue retains most of the structure of compact bone tissue. Conclusion: The procedure that our team has established is the right one for obtaining demineralized bone as bone replacement material and applies to a wide variety of human bone tissue.

Long bone uninfected non-union: grafting techniques.

Long bone non-unions represent a serious clinical and socioeconomical problem due to the prolonged episodes, frequent sequelae, and variable treatment effectiveness. Bone grafts, classically involving the autologous iliac crest graft as the 'gold standard' bone graft, enhance bone regeneration and fracture healing incorporating osteoconductive and/or osteoinductive/osteogenic capacity to the non-union under treatment. Structural alternatives to autologous bone grafts include allografts and bone substitutes, expanding the available stock but loosing biological properties associated with cells in the graft. Biological alternatives to autologous bone grafts include bone marrow concentration from iliac crest aspiration, bone marrow aspiration from reaming of the diaphyseal medullary canal in the long bones, and isolated, expanded mesenchymal stem cells under investigation. When the combination with natural and synthetic bone substitutes allows for larger volumes of structural grafts, the enhancement of the biological regenerative properties through the incorporation of cells and their secretoma permits to foresee new bone grafting solutions and techniques.

Alloplastic bone grafts in maxillofacial surgery – An overview

Bone grafting techniques have been used by medical practitioners for over a century. A few factors that influence how successfully a grafted material is assimilated are its mechanical strength, pore size, ability to stimulate bone growth, and type of the graft. The four properties that the bone transplant material should possess are osteogenesis, osteoinduction, osteoconduction, and osteointegration. Despite being the only material with all four qualities, autologous bone has limited applications because of morbidities at the donor site. Allogeneic bone, which is taken from a different person and is commonly processed by tissue banks, is an alternative to autogenous bone. It carries a danger of spreading illness and being antigenic. Over the past few decades, the development of synthetic bone substitutes has opened up a wide range of options and opportunities to solve these limitations. In bone grafting procedures, synthetic bone replacements and biological components are quickly taking the place of natural grafts. Considerations include the patient's characteristics, the location, the extent of the lesion, and the cost and availability of the graft materials. This review has covered a variety of commonly used alloplastic materials.

Periodontal tissue regeneration: current therapeutic strategies and future directions in further research

Chronic and progressive destruction/damage of the periodontal tissues resulted from periodontitis is the leading cause of tooth loss in adults. Traditional periodontal therapies such as scaling and root planning or flap surgery have demonstrated effective in controlling local inflammation and in suppressing/arresting the disease progression of periodontitis. However, those infection control measures cannot help to regenerate lost periodontal tissues to a statistically or clinically significant degree. Although some successes regarding the reduction of the intrabony defect and maintenance of the periodontal homeostasis have been achieved in periodontal regenerative procedures, comprising but not limited to guided tissue regeneration (GTR) or bone grafting technique, the restorative effectiveness of the architecture and function of the lost or injured tissues is far from our clinical expectation. The use of the concept, technique, and method of tissue engineering for periodontal regeneration is a hotspot and animal studies have shown interesting outcomes in terms of functional regeneration of lost/damaged support tissues in the periodontium, including alveolar bone, periodontal ligament, and cementum. However, numerous issues need to be addressed before those regenerative approaches can be responsibly transformed to novel clinical therapies. Recently, paradigm that induces homing of host stem cells to site of the periodontium and encourage the body's innate capability to repair is a new research field termed endogenous regeneration. Given that endogenous regenerative technique avoids ex-vivo cell culture and transplantation, it should be relatively easier to be used in the treatment of clinical patients. Due to the limited oral microenvironment and harsh periodontal local condition for tissue regeneration, as well as poor understanding of periodontal regenerative biology, there is still a long way ahead to explore new effective, practical, and economical therapies to save and protect natural tooth and for combating highly prevalent periodontal disease.

Guided and Prosthetically Driven Bone Augmentation Using the Shell Technique and Allogeneic Cortical Plate: A Prospective Case Series.

To describe the use of digital technology to surgically guide the shell technique using allogenic cortical plates for a fully guided bone augmentation procedure. A total of 10 patients who required bone augmentation for implant placement were included in this study. Allogenic cortical plates were planned using CAD/CAM to have identical thickness to the original cortical plates, then were digitally positioned and shaped to outline the bone defect according to the existing anatomical details. A cutting pattern and a surgical template were manufactured according to the digitally preplanned bone graft and the intraoral setting. A total of 12 horizontal bone grafting procedures were performed using the shell technique with allogenic cortical plates. All grafting procedures were deemed successful and allowed for ideal 3D implant positioning. Of the 12 bone grafting procedures, which used a surgical template to position the cortical plate, 3 required an adjustment to reposition the plate to a more ideal position. Digital technology was used to create a surgical template to guide the shell bone grafting technique with allogenic cortical plates. All surgical templates offered a fixed support to hold the cortical allogenic plate in the preplanned position, offering a predictable, simplified, and accurate guided bone grafting procedure. Further studies on a larger population of patients are necessary to assess those results and to verify the treatment approach described in this study.

Comparative Assessment of Surgical Treatment Results of Patients with Early-Stage Avascular Necrosis of the Femoral Head

Background. The observed sharp increase in patients with avascular necrosis of the femoral head (ANFH) associated with a new COVID-19 infection determines the need to find some new effective strategies for surgical treatment to achieve long-term positive results.&#x0D; Aim of the study is to make a comparative assessment of surgical treatment results of patients with early-stage avascular necrosis of the femoral head using different techniques of core decompression and autogenous bone grafting of the femoral head.&#x0D; Methods. We performed a comparative analysis of the treatment results of patients with early stages of ANFH. The patients were divided by the treatment method into two groups: control and main. Surgical treatment in the control group (n = 19) consisted of an open decompression and autogenous bone grafting of the femoral head using the Rosenwasser’s “light bulb” technique. The main group (n = 17) included the patients who had undergone the developed combined impaction autografting of the femoral head. Clinical and functional assessment of the treatment results was performed using the Harris Hip Score (HHS) questionnaire and the Western Ontario and McMaster University Osteoarthritis Index (WOMAC) score. Assessment was performed preoperatively and at 3, 6, and 12 months postoperatively.&#x0D; Results. The performed comparative analysis showed statistically significant difference in clinical and functional results after operative treatment in patients of the control and the main groups at all follow-ups. Change of the HHS values presented as Me (Q1;Q3) in patients of both groups at 3, 6 and 12 months was 77.0 (68.0;84.0) and 82.0 (75.0;91.0), p = 0.001; 79.0 (69.0;85.0) and 88.0 (79.0;95.0), p0.001; 81.0 (71.0;86.0) and 90.0 (85.0;92.0), p0.001, respectively. According to the WOMAC, the following dynamics was revealed for the same values: 30.0 (25.0;35.0) and 25.0 (21.0;32.0), p = 0.002; 27.0 (22.0;33.0) and 20.0 (17.0;27.0), p0.001; 24.0 (17.0;30.0) and 15.0 (13.0;24.0), p0.001.&#x0D; Conclusion. Comparative assessment of efficacy of the open core decompression with autogenous bone grafting of the femoral head defect using the light bulb technique and closed intralesional resection of necrosis focus with combined impaction grafting of the femoral head showed that the minimal damage to para- and intraarticular tissues when performing the approach to the area of the pathological focus and the main stages of the operation allows to achieve the best clinical and functional results and create optimal conditions for bone remodeling in the grafting area.

Posterior Shoulder Instability and Glenoid Bone Loss: A Review and a Free Bone Graft Technique.

Posterior glenoid bone loss (pGBL) is frequently associated with posterior shoulder instability. Posterior glenohumeral instability accounts for a small percentage of shoulder pathologies, and critical bone loss in posterior instability has not been well defined in the literature. Younger patient populations who participate in activities that repetitively stress the posterior stabilizing structures of the shoulder are more prone to developing posterior shoulder instability. A variety of surgical options have been described, ranging from isolated capsulolabral repair to glenoid osteotomy. Soft-tissue repair alone may be an inadequate treatment in cases of pGBL and places patients at a high risk of recurrence. Our preferred technique for posterior glenoid reconstruction in cases of pGBL involves the transfer of a free iliac crest bone graft onto the native glenoid. The graft is contoured to fit the osseous defect and secured to provide an extension of the glenoid track. In this study, we review pGBL in the setting of posterior instability and describe our technique in detail. Further long-term studies are needed to refine the indications for glenoid bone graft procedures and quantify what constitutes a critical pGBL.