Stephen S Wallace's research while affiliated with Columbia College and other places

Publications (41)

Article
Recently, the Low Window technique was proposed to facilitate sinus augmentation and reduce postsurgical patient discomfort. It was shown to be both safe and effective. This case series evaluates the postsurgical discomfort of patients undergoing Low Window sinus augmentation, the bone gain achieved, and whether these factors correlate with the ost...
Article
Maxillary sinus elevation by the lateral window approach has been shown to be a highly predictable surgical procedure for increasing bone volume in the posterior maxilla. There are occasions, however, where this procedure may be difficult or impossible to perform in a highly predictable manner. There are many presurgical conditions and anatomical f...
Article
Maxillary sinus grafting is generally a safe procedure. However, intraoperative complications, as well as early and late postoperative complications, may occur. Included in the latter group are graft infections that can be triggered by peri-implantitis. The aim of the present study was to report three cases of late maxillary sinus graft infections...
Article
Maxillary sinus augmentation is a procedure commonly performed in patients in need of posterior maxillary implants with limited vertical ridge height and sinus pneumatization. However, minimal information has been presented to evaluate the complexity of the sinus elevation procedure via a lateral window approach based on patient examination, includ...
Chapter
Of the pre‐prosthetic surgical procedures utilized to restore lost bone volume, sinus augmentation surgery has been shown to have the highest clinical predictability. During the diagnostic phase, it is useful to identify all ear, nose, and throat conditions that may be relative or absolute contraindications for sinus augmentation via specific radio...
Article
Maxillary sinus augmentation is a procedure commonly performed in patients in need of posterior maxillary implants with limited vertical ridge height and sinus pneumatization. However, minimal information has been presented to evaluate the complexity of the sinus elevation procedure via a lateral window approach based on patient examination, includ...
Article
Full-text available
Maxillary sinus augmentation is the most predictable of the pre‐prosthetic surgical procedures. There are, however, known and well‐documented complications that can and do occur. The most common are the intraoperative complications of sinus membrane perforation and bleeding, and the postoperative complications of sinus graft infections, sinus infec...
Article
This retrospective study investigated the changes in the maxillary sinus floor and alveolar crest following extraction of maxillary molars. Pre- and postextraction cone beam computed tomography scans of 23 patients were analyzed. Paired-sample t tests compared pre- and postextraction measurements, and independent-sample t tests were utilized for in...
Article
Full-text available
Purpose: The present, randomized, controlled clinical trial compared the histologic and histomorphometric results from maxillary sinus augmentation with either biphasic calcium phosphate (BCP) (60% hydroxyapatite and 40% β-tricalcium phosphate) or autogenous bone (AB) as bone-grafting materials. Material and methods: Ten patients received bilate...
Article
Full-text available
Several systematic reviews have shown that maxillary sinus augmentation is a predictable and effective procedure for augmentation of an atrophic posterior maxilla. However, we know of no reviews that have covered all the clinical aspects. We searched the PubMed, EMBASE, Cinhal, and Cochrane databases up to January 2015 to select relevant studies th...
Chapter
Maxillary sinus elevation is the most predictable and successful of the pre-prosthetic augmentation procedures. Complications are infrequent, generally localized, and usually readily remedied. Complications can be classified by the time of occurrence as intraoperative, early postoperative or late postoperative. The most common intraoperative compli...
Article
The purpose of this study was to histomorphometrically evaluate the percentage of vital bone after grafting of maxillary sinuses using two different concentrations of recombinant human bone morphogenetic protein/acellular collagen sponge (rhBMP-2/ACS) combined with mineralized cancellous bone allograft (MCBA) and to compare the results to a control...
Article
Conventional dentoalveolar osseous augmentation procedures for creating bone volume for dental implant placement often involve the use of grafting materials with or without barrier membranes to foster selective cell and tissue repopulation. A study was conducted to determine the efficacy of equine particulate bone (Equimatrix, Osteohealth) to augme...
Article
Maxillary sinus surgery has been shown to be a reliable procedure for increasing vertical bone height prior to implant placement. A variety of grafting materials have been proposed, with particulate bone substitutes showing similar clinical results to autogenous bone when rough surfaces implants are used. A barrier membrane is usually placed extern...
Article
The predictability of maxillary sinus augmentation has been extensively reported. Procedural outcomes, most often measured as implant survival rates, have customarily used inclusion criteria that included a minimum 1-year loading time. The inclusion criteria of this review extended the minimum postloading evaluation to 3 years to determine if the p...
Article
Full-text available
The purpose of this study was a histomorphometric comparison of vital bone formation following maxillary sinus augmentation with two different particle sizes of anorganic bovine bone matrix (ABBM). Bilateral sinus floor augmentations were performed in 13 patients. Trephine bone cores were taken from the lateral window areas of 11 patients 6 to 8 mo...
Article
The purpose of this study was to assess vital bone formation at 4 to 5 months and 7 to 9 months following sinus augmentation with anorganic bovine bone matrix (ABBM) with and without recombinant human platelet-derived growth factor (rhPDGF). Twenty-four subjects received bilateral sinus elevation surgery with ABBM on one side and ABBM and rhPDGF on...
Article
Context: The maxillary sinus elevation procedure has become an important pre-prosthetic surgical procedure for the creation of bone volume in the edentulous posterior maxilla for the placement of dental implants. Research and clinical experience over the past 30 years has increased the predictability of this procedure as well as reduced patient mo...
Article
Long-term success of dental implants has been demonstrated when placed simultaneously with or after a sinus augmentation procedure. However, optimal bone formation can be from 6 to 9 months or longer with grafting materials other than autogenous bone. For this reason, there is interest in any surgical technique that does not require autogenous bone...
Article
The objective of the following case reports was to assess whether mineralized bone replacement grafts (eg, xenografts and allografts) could be added to recombinant human bone morphogenetic protein-2/acellular collagen sponge (rhBMP-2/ACS) in an effective manner that would: (1) reduce the graft shrinkage observed when using rhBMP-2/ACS alone, (2) re...
Book
Osseointegration and Dental Implants offers a comprehensive guide to the state of the art of implant dentistry. Based around the proceedings of the Toronto Osseointegration Conference Revisited, it gathers together information on all aspects of implant dentistry and osseointegration, from basic scientific background, such as the biology of osseoint...
Article
This blinded, randomized, controlled pilot investigation is the first to histomorphometrically compare vital bone formation following bilateral sinus grafting with a biphasic calcium phosphate (BCP) (Straumann Bone Ceramic) to an anorganic bovine bone matrix (ABBM) (Bio-Oss) 6 to 8 months following graft placement. Twelve patients were selected. Fo...
Article
Full-text available
The most frequent intraoperative complication with sinus elevation is perforation of the schneiderian membrane. In most instances, the repair of this perforation is necessary to contain particulate grafting material and complete the procedure. New techniques are presented here for the management of large perforations of the schneiderian membrane. A...
Article
Full-text available
The lateral window sinus elevation procedure has become a routine and highly successful preprosthetic procedure that is used to increase bone volume in the posterior maxilla for the placement of dental implants. Many surgical techniques have been proposed that provide access to the maxillary sinus through the lateral wall to allow for elevation of...
Article
The lateral window sinus elevation procedure has become a routine and highly successful preprosthetic procedure that is used to increase bone volume in the posterior maxilla for the placement of dental implants. Many surgical techniques have been proposed that provide access to the maxillary sinus through the lateral wall to allow for elevation of...
Article
The present blinded, randomized, controlled investigation histomorphometrically evaluated the vital bone formed following bilateral grafting with two different materials--Puros, a mineralized cancellous bone allograft (MCBA), and Bio-Oss, an anorganic bovine bone matrix (ABBM)--at 26 to 32 weeks following graft placement. Thirteen patients were sel...
Article
Sinus elevation surgery has been used by the dental profession to increase bone quantity in the posterior maxilla for the placement of root-form implants. The original treatment protocol was developed using existing bone-healing theories that relied on expert opinion. In 2003 and 2004, 2 evidence-based literature reviews were published, expanding s...
Article
The purpose of the present study, which used anorganic bovine bone (Bio-Oss) with and without autogenous bone as the augmentation material, was to compare the results of sinus elevation performed without a membrane (control) with the results of sinus elevation performed with either a short-term bioabsorbable membrane (Bio-Gide) or a nonabsorbable m...
Article
A prospective clinical research study of various graft materials used for the augmentation of human maxillary sinuses is currently in progress at New York University Department of Implant Dentistry. This interim case report describes the healing response after a sinus augmentation procedure using a new mineralized cancellous bone allograft. The res...
Article
Grafting the floor of the maxillary sinus has become the most common surgical intervention for increasing alveolar bone height prior to the placement of endosseous dental implants in the posterior maxilla. Outcomes of this procedure may be affected by specific surgical techniques, simultaneous versus delayed implant placement, use of barrier membra...
Article
Full-text available
Platelet-rich plasma is an autologous product that is derived from whole blood through the process of gradient density centrifugation. The proposed value of this product in dental implantology and in bone augmentation procedures lies in the ability to incorporate high concentrations of the growth factors PDGF TGF-beta1, TGF-beta2, and IGF as well a...
Article
In 1993 the Department of Implant Dentistry at New York University College of Dentistry began a long-term clinical, histologic, histomorphometric, and radiographic study of the sinus elevation procedure. One of the parameters under evaluation in this study is the effect of barrier membrane placement on the creation of vital bone in the grafted sinu...
Article
The biologic width around implants has been well documented in the literature. Once an implant is uncovered, vertical bone loss of 1.5 to 2 mm is evidenced apical to the newly established implant-abutment interface. The purpose of this study was to evaluate the lateral dimension of the bone loss at the implant-abutment interface and to determine if...
Article
One of the goals of the sinus elevation procedure is the creation of vital bone to effect the osseointegration of dental implants placed in the posterior maxilla. With this goal in mind, in 1993 the Department of Implant Dentistry at New York University College of Dentistry began a long-term clinical, histologic, histomorphometric, and radiographic...
Article
A histologic assay of the grafting material associated with the sinus elevation procedure would provide insight into the quality and quantity of vital bone at the implant-bone interface. This case report documented for the first time the sequential healing process of a sinus graft in the same patient at 4, 8, 12, and 20 months. Histology of trephin...

Citations

... As a consequence, they might retain biological and mechanical characteristics different from those of the surrounding native or newly formed bone [50]. In particular, they might lack a well-structured microvascular bed, typical of mature bone, which is of utmost importance in the immune defense against possible infections [51,52]. During graft healing, a given reduction of graft dimension is a physiological consequence of early remodeling, and only small changes should occur thereafter [39]. ...
... 21 A recent study summarized factors that could possibly influence the risk of sinus membrane perforation during the lateral window technique, and a scoring system was proposed to rank low-, moderate-, and high-risk factors. 22,23 Bony fenestration of the maxillary sinus wall or floor is definitely another risk factor that should be taken into consideration. It has been reported that during reentry surgery following a previous sinus augmentation that was aborted for any reason, the sinus membrane is more likely to heal with scar or fibrotic tissue, therefore increasing the difficulty when performing membrane elevation. ...
... As anatomical risk factors for intraoperative complication, such as maxillary sinus membrane perforation, Testori et al. reported sinus membrane thickness, the presence of sinus septa, palatonasal recess, and sinus contour [6], while Akay et al. [7] and Lee et al. [8] reported on the relationship between sinus volume and the presence of septum and sinus membrane thickness. In another study, Testori et al. reported that sinus membrane thickness, nasal septal deviation (NSD), previous history of sinusitis, and natural ostium obstruction were anatomical risk factors for postoperative maxillary sinusitis, while the anatomical structure of the maxillary sinus is known to affect intraoperative and postoperative complications [9]. ...
... As anatomical risk factors for intraoperative complication, such as maxillary sinus membrane perforation, Testori et al. reported sinus membrane thickness, the presence of sinus septa, palatonasal recess, and sinus contour [6], while Akay et al. [7] and Lee et al. [8] reported on the relationship between sinus volume and the presence of septum and sinus membrane thickness. In another study, Testori et al. reported that sinus membrane thickness, nasal septal deviation (NSD), previous history of sinusitis, and natural ostium obstruction were anatomical risk factors for postoperative maxillary sinusitis, while the anatomical structure of the maxillary sinus is known to affect intraoperative and postoperative complications [9]. Moreover, the osteomeatal complex (OMC), composed of structures, such as the nasal septum, concha bullosa, middle nasal concha, uncinate process, and Haller cells, reportedly affects sinus membrane thickness which is a risk factor for maxillary sinus membrane perforation and postoperative maxillary sinusitis [9]. ...
... Severe loss of alveolar bone height and width can occur following removal of maxillary molars with advanced periodontitis. The decrease in the vertical dimension of the edentulous ridge in maxillary molar extraction sites was also related to sinus pneumatization [10][11][12]. Preservation and reconstruction of alveolar ridge volume in molar extraction sockets affected by severe periodontitis present clinical challenges. ...
... 7 Despite the predictability of the techniques and biomaterials employed in sinus graft procedures, intra-and postoperative complications are common, like sinusitis, rhinosinusitis, fistulae, migration of the implant into the maxillary sinus, infection, sinus membrane perforation, excessive bleeding, and perforations in the buccal flap (Figs 1 and 2). 8,9 Much of the current literature discusses the local risk factors related to sinus augmentation, with few studies focusing on patient-related risk factors. 10 The purpose of this review is to identify, evaluate, and discuss the possible management of patient-related risk factors that can contribute to intra-and extraoperative complications, allowing for more predictable maxillary sinus floor augmentation outcomes. ...
... Guided bone regeneration (GBR) techniques have therefore often been used to increase the availability of bone tissue for implant placement 6,7 . Although autogenous bone graft is considered the gold standard bone substitute biomaterial 8,9 , autograft can cause side effects related to donor site morbidity, and has limitations due to the limited availability and high resorption rates of this kind of graft 10 . This has promoted the use of alternative bone substitutes, especially deproteinized bovine bone (DBB), in guided bone regeneration techniques 7,11 . ...
... Sinus floor elevation (SFE) has been known as a surgical technique to increase the vertical height for implant placement in the atrophic maxilla [1,2]. Two surgical procedures for SFE have been known: the lateral window technique and the crestal osteotome technique [1]. ...
... Dental occlusion is affected by dentist-applied treatments, ranging from fillings to extensive reconstructions and orthodontic treatments [13]. Research has shown that changes in occlusion lead to a neuroplastic modification that is important for adaptation [14]. Thus, in response to peripheral stimuli, the brain has the ability to change, 2 of 10 and understanding this phenomenon can enhance our knowledge of patients' abilities to adapt to new occlusal relationships [15]. ...
... This ability may be an advantage provided by selective tissue selection during osteotomy via alternative osteotomy methods. Wallace et al. showed that perforation of the soft tissue Schneiderian membrane, an unwanted sequela during a sinus lift, was reduced from 30% to 7% when switching from conventional osteotomy methods to a piezoelectric tool (34). Landes et al. also compared the complications after 1,000 Le Fort I surgeries through conventional means with piezoelectric means. ...