Evaluation of 2 techniques of epithelial removal in subepithelial connective tissue graft surgery: a comparative histological study.

Purpose: Subepithelial connective tissue grafts (SCTGs) are commonly performed for the treatment of gingival recession due to their high predictability. This study evaluated and histologically compared connective tissue grafts in terms of the presence of epithelial remnants and composition of the tissue types that were present (epithelium, lamina propria, and submucosa).

Methods: Ten patients underwent epithelium removal using 2 different techniques: the use of a blade (group B) and through abrasion (group A).

Tissue responses resulting from tooth movement surgically assisted by corticotomy and corticision in rats.

Objective: To compare the histological responses in corticotomy- and corticision-assisted tooth movement.

Materials And Methods: Ninety Wistar rats were divided into three groups: C (control-tooth movement only), CT (tooth movement + corticotomy), and CI (tooth movement + corticision). Surgeries were performed on the vestibular and lingual cortical bone of the maxillary first molar.

Complete physical mapping of IL6 reveals a new marker associated with chronic periodontitis.

Background And Objective: Interleukin-6 (IL-6) is a powerful stimulator of osteoclast differentiation and bone resorption. Production of IL-6 is modulated by polymorphisms, and higher levels of this cytokine are found locally in patients with chronic periodontitis. In this study we performed a modern approach - Complete physical mapping of the IL6 gene - to identify the polymorphisms associated with chronic periodontitis in a southern Brazilian population sample.

Histological and immunohistochemical evaluation of biphasic calcium phosphate and a mineral trioxide aggregate for bone healing in rat calvaria.

This work focused on the process of bone repair of defects in standardized calvaria of Wistar rats treated with biphasic calcium phosphate (BCP), mineral trioxide aggregate (MTA), or a combination of the two. Eighty Wistar rats were divided into four treatment groups and were examined at 2 and 8 weeks. A surgical defect was created in the calvaria using a 6-mm diameter trephine drill.

Bismuth subgallate as a topical haemostatic agent at the palatal wounds: a histologic study in dogs.

This study evaluated the early recovery process of the palatal wounds of dogs using bismuth subgallate. Five healthy adult male dogs underwent eight 5-mm partial-thickness punch biopsies in two paired columns on the palatal mastigatory mucosa. For the haemostasis, one side received moistened gauze pressure (test group 1), and the other received bismuth subgallate (test group 2).

Rapid orthodontic extrusion using an interocclusal appliance for the reestablishment of biologic width: a case report.

A multidisciplinary treatment of a case of subgingival fracture in a maxillary anterior tooth is presented. This case report describes a simple method involving an interocclusal appliance and an elastic band for rapid orthodontic extrusion to reestablish biologic width. In addition, a simple technique for surgical recontouring following the coronal displacement of the gingival margin prior to restoration of fractured tooth is explained.

Orthodontic extrusion and implant site development using an interocclusal appliance for a severe mucogingival deformity: a clinical report.

A multidisciplinary therapy used to treat a patient with a severe mucogingival deformity in the area of maxillary anterior teeth is presented. The simple technique uses an interocclusal appliance and elastic band for orthodontic extrusion to correct the mucogingival deformity and develop an implant site. This approach is designed to increase the amount of keratinized tissue and new alveolar bone, which are necessary for the development of an implant site.

The relationship between interimplant distances and vascularization of the interimplant bone.

Background: Long-term success of the implant restorations is based upon the biology and vasculature of the bone surrounding the implants, especially for the bone between two implants.

Purpose: The aim of this study was to evaluate how loaded implants placed 2 or 3 mm apart influence bone vessel organization.

Material And Methods: Six mongrel dogs were used for the study.

Bismuth subgallate as a topical hemostatic agent at palatal donor sites.

Objective: To present bismuth subgallate as a simplified and efficient method for promoting hemostasis at palatal donor sites, as evaluated by measuring hemostasis time and delayed bleeding.

Method And Materials: Ten patients received the bismuth subgallate paste as a topical hemostatic agent, while another 10 patients received moistened gauze pressure. The time to obtain complete hemostasis, defined as no visual bleeding, was recorded for each subject.

Effect of biofunctionalized implant surface on osseointegration: a histomorphometric study in dogs.

Among the different properties that influence bone apposition around implants, the chemical or biochemical composition of implant surface may interfere on its acceptance by the surrounding bone. The aim of this study was to investigate if a biofunctionalization of implant surface influences the bone apposition in a dog model and to compare it with other surfaces, such as a microstructured created by the grit-blasting/acid-etching process. Eight young adult male mongrel dogs had the bilateral mandibular premolars extracted and each one received 6 implants after 12 weeks, totaling 48 implants in the experiment.

Bone remodeling adjacent to Morse cone-connection implants with platform switch: a fluorescence study in the dog mandible.

Purpose: The aim of this study was to evaluate, through fluorescence analysis, the effect that different interimplant distances, after prosthetic restoration, will have on bone remodeling in submerged and nonsubmerged implants restored with a "platform switch."

Materials And Methods: Fifty-six Ankylos implants were placed 1.5 mm subcrestally in seven dogs.

Influence of interimplant distance on bone microstructure: a histomorphometric study in dogs.

The microstructure of the crestal alveolar bone is important for both the maintenance of osseointegration and the location of the gingival soft tissues. The aim of this study was to evaluate and compare the bone microstructure of the alveolar bone and of the interimplant bone in implants inserted at different interimplant distances. The mandibular bilateral premolars of six dogs were extracted, and after 12 weeks, each dog received eight implants, for a total of 48 implants.

Histological and histomorphometric analysis of the bone-screw interface in the mandibular body after using a 2.0-mm miniplate system: an experimental study in dogs.

Purpose: To evaluate the bone-screw interface in a 2.0-mm miniplate system used for rigid internal fixation (RIF).

Materials And Methods: Nine adult mongrel dogs were subjected to unilateral continuous defect through an osteotomy between the lower third and fourth premolars.

The effect of bone condensation and crestal preparation on the bone response to implants designed for immediate loading: a histomorphometric study in dogs.

Purpose: The aim of this study was to evaluate the influence of bone condensation and crestal preparation on the bone response of implants designed to promote osseocompression.

Materials And Methods: In the first phase, the mandibular premolars of 6 dogs were extracted bilaterally. After 8 weeks, each dog received 8 Xive implants (4 per hemimandible).

Preprosthetic periodontal surgery in the proximal area with modification of the col area: results following the reestablishment of the contact point.

Background: Anatomic characteristics of interproximal areas are dependent on the anatomy, position, and proximal contact of adjacent teeth. The objective of this study was to investigate the influence of the reestablishment of the interproximal contact following the restorative alveolar interface (RAI) procedure on the interproximal gingival COL and formation of the interdental gingival papilla.

Methods: Six mongrel dogs received bilateral apically positioned flaps, crown lengthening, and the RAI procedure on the maxillary fourth bicuspid and first molar.

The effects of interimplant distances on papilla formation and crestal resorption in implants with a morse cone connection and a platform switch: a histomorphometric study in dogs.

Background: Implant esthetics have been the focus of attention for the last few years, and one of the most important points is the effect that interimplant distances can have on papilla formation and bone loss. The aim of this study was to evaluate the effect that distances of 1, 2, and 3 mm between implants after prosthetic restoration will have on crestal bone resorption (from the top of the implant to the bone crest [TI-BC]) and bone resorption (from the top of the implant to the first bone-to-implant contact TI-BIC) in two-stage implants used in a submerged and non-submerged protocol.

Methods: The mandibular bilateral premolars of seven dogs were extracted, and after 12 weeks, each dog received eight implants.

Influence of interimplant distance on papilla formation and bone resorption: a clinical-radiographic study in dogs.

Implant esthetics has been the focus of attention for the past decade, and one vital issue is the effect of interimplant distance on interimplant papilla formation and crestal bone loss. The aim of this study was to evaluate the effect of 1, 2, and 3 mm of interimplant distance on papilla formation and crestal resorption in submerged and nonsubmerged Ankylos implants after prosthetic restoration. Bilateral mandibular premolars of 7 dogs were extracted, and after 12 weeks each dog received 8 implants.

Osseointegration of oxidized and turned implants in circumferential bone defects with and without adjunctive therapies: an experimental study on BMP-2 and autogenous bone graft in the dog mandible.

The aim of the study was to compare the integration and implant stability of turned and oxidized titanium implants when placed in experimental bone defects with autogenous bone graft, BMP-2 or without adjunctive therapy. Four defects were prepared on each side of the mandible of 12 mongrel dogs five months after tooth extractions. Implants with turned and oxidized surfaces were placed in the defects.

Influence of the interimplant distance on crestal bone resorption and bone density: a histomorphometric study in dogs.

Background: The position of gingival soft tissues depends on the position and health of the underlying alveolar bone. The aim of this study was to evaluate the influence of different interimplant distances on crestal bone resorption after prosthetic restoration with a 5-mm distance between the contact point and the bone crest.

Methods: The mandibular bilateral premolars of six dogs were extracted and, after 12 weeks, each dog received eight implants, totaling 48 implants in the experiment.

Influence of interimplant distance on gingival papilla formation and bone resorption: clinical-radiographic study in dogs.

Purpose: The purpose of this study was to evaluate in dogs the area between implants after prosthetic restoration within 5 mm distance between the contact point (CP) between crowns and the bone crest (BC).

Materials And Methods: The mandibular premolars of 6 dogs were extracted bilaterally. After 12 weeks of healing, each dog received 8 implants.

Combined endodontic therapy and surgery in the treatment of dens invaginatus Type 3: case report.

An accurate understanding of the morphology of the root canal system is a prerequisite for successful root canal treatment. Invaginated teeth have a complex root canal configuration that cannot be instrumented effectively and should be treated by both endodontic therapy and surgery. A case of dens invaginatus Type 3 in a maxillary lateral incisor with a periapical lesion and its successful treatment by these combined methods is reported.

Crestal bone loss minimized when following the crestal preparation protocol: a histomorphometric study in dogs.

Initial breakdown of the implant-tissue interface generally begins at the crestal region in successfully osseointegrated implants. The purpose of this study was to evaluate the effect on crestal bone loss (CBL) around implants specially developed for immediate loading with a unique crestal drill. After 8 weeks postextraction, 6 young male mongrel dogs received 48 implants (XiVE) in the region corresponding to the 4 mandibular premolars.

Acellular dermal matrix and hydroxyapatite in prevention of ridge deformities after tooth extraction.

The aim of this study was to evaluate the role of acellular dermal matrix graft (ADMG) acting as a membrane, associated with a resorbable hydroxyapatite (RHA) in bone regeneration to prevent ridge deformities after tooth extraction. Fifteen patients who had at least 2 noncontiguous, uniradicular teeth indicated for extraction were selected. In group I, the extraction sockets were covered by ADMG alone; and in group II, the alveoli were filled with RHA before the placement of the ADMG.