Influence of microgap location and configuration on radiographic bone loss around submerged implants: an experimental study in dogs.

Purpose: The vertical location of the implant-abutment connection influences the subsequent reaction of the peri-implant bone. It is not known, however, whether any additional influence is exerted by different microgap configurations. Therefore, the radiographic bone reactions of two different implant systems were monitored for 6 months.

Influence of microgap location and configuration on radiographic bone loss in nonsubmerged implants: an experimental study in dogs.

Purpose: The implant-abutment connection (microgap) influences the peri-implant bone morphology. However, it is unclear if different microgap configurations additionally modify bone reactions. This preliminary study aimed to radiographically monitor peri-implant bone levels in two different microgap configurations during 3 months of nonsubmerged healing.

Bone healing in critical-size defects treated with either bone graft, membrane, or a combination of both materials: a histological and histometric study in rat tibiae.

Objectives: The aim of the present investigation was to histologically analyze the effect of using lyophilized bovine bone (GenOx® organic matrix) with (or without) guided tissue regeneration (using a decalcified cortical osseous membrane [GenDerm®]) on bone healing in surgically created critical-size defects created in rat tibia.

Material And Methods: Surgical critical-size bone defects were created in 64 animals that were randomly divided into four groups: group I (control); group II (defect filled with GenOx®); group III (defect covered by GenDerm®); group IV (defect filled with GenOx® and covered by GenDerm®). Animals were killed at 30 or 90 days post-surgery.

Effectiveness of two methods for preparation of autologous platelet-rich plasma: an experimental study in rabbits.

Objectives: The purpose of this study was to compare the quantity and quality of platelets in platelet-rich plasma (PRP) samples prepared using either the single- or the double-centrifugation protocol.

Methods: Ten adult white New Zealand rabbits were used. Ten ml of blood were drawn from each animal via cardiac puncture.

Influence of microgap location and configuration on peri-implant bone morphology in nonsubmerged implants: an experimental study in dogs.

Purpose: It is unknown whether different microgap configurations can cause different peri-implant bone reactions. Therefore, this study sought to compare the peri-implant bone morphologies of two implant systems with different implant-abutment connections.

Materials And Methods: Three months after mandibular tooth extractions in six mongrel dogs, two oxidized screw implants with an external-hex connection were inserted (hexed group) on one side, whereas on the contralateral side two grit-blasted screw implants with an internal Morse-taper connection (Morse group) were placed.

Effect of platelet-rich plasma on bone healing of autogenous bone grafts in critical-size defects.

Aim: This study histologically analysed the effect of autogenous platelet-rich plasma (PRP), prepared according to a new semiautomatic system, on healing of autogenous bone (AB) grafts placed in surgically created critical-size defects (CSD) in rabbit calvaria.

Material And Methods: Sixty rabbits were divided into three groups: C, AB and AB/PRP. A CSD was created in the calvarium of each animal.

Correction of a mucogingival defect using an implant-retained postoperative stent in a severely resorbed mandible: case report.

This case report describes a technique that uses a palatal mucosal graft and an acrylic resin postoperative stent in an attempt to increase the layer of keratinized tissue around osseointegrated implants in an atrophic mandible. During second-stage surgery, a split-thickness labial flap is reflected and apically repositioned by being sutured onto the periosteum and connective tissue. A palatal mucosal graft is then sutured onto the recipient site.

Influence of bioactive glass and/or acellular dermal matrix on bone healing of surgically created defects in rat tibiae: a histological and histometric study.

Purpose: The purpose of this study was to histologically analyze the influence of bioactive glass and/or acellular dermal matrix on bone healing in surgically created defects in the tibiae of 64 rats (Rattus norvegicus, albinus, Wistar).

Materials And Methods: A 4-mm x 3-mm unicortical defect was created on the anterolateral surface of the tibia. Animals were divided into 4 groups: C, control; BG, the defect was filled with bioactive glass; ADM, the defect was covered with acellular dermal matrix; and BG/ADM, the defect was filled with bioactive glass and covered with acellular dermal matrix.

Influence of microgap location and configuration on the periimplant bone morphology in submerged implants. An experimental study in dogs.

Objectives: The vertical location of the implant-abutment connection influences the periimplant bone morphology. It is unknown, however, whether different microgap configurations cause different bone reactions. Therefore, in this study the bone morphologies of two different implant systems were compared.

Particulate inlay nasal graft with immediate dental implant placement in a patient with repaired alveolar cleft: case report.

Primary bone grafts in congenital cleft alveolus do not always provide sufficient bulk or height of bone for ideal placement of endosseous implants. Thus, maxillary sinus or nasal floor elevation and inlay bone grafts in previously grafted areas are not exceptions in the daily routine. This case report stresses the need of a detailed treatment plan and careful surgical management of nasal floor elevation with particulate autogenous bone graft to successfully provide the patient with osseointegrated prostheses.

A modified approach for vestibuloplasty in severely resorbed mandible using an implant-retained postoperative stent: a case report.

Background: Severely resorbed mandibles often present a short band of keratinized tissue associated with a shallow vestibule. As a result, prominent muscle insertions are present, especially in the mental region of the mandible. This case report describes the deepening of the vestibular sulcus in an atrophic mandible by combining free gingival grafts harvested from the palate and a postoperative acrylic resin stent screwed on osseointegrated implants placed at the anterior region of the mandible.

Autogenous bone graft with or without a calcium sulfate barrier in the treatment of Class II furcation defects: a histologic and histometric study in dogs.

Background: The purpose of this study was to histologically evaluate the healing of surgically created Class II furcation defects treated using an autogenous bone (AB) graft with or without a calcium sulfate (CS) barrier.

Methods: The second, third, and fourth mandibular premolars (P2, P3, and P4) of six mongrel dogs were used in this study. Class II furcation defects (5 mm in height x 2 mm in depth) were surgically created and immediately treated.

Bone healing in surgically created defects treated with either bioactive glass particles, a calcium sulfate barrier, or a combination of both materials. A histological and histometric study in rat tibias.

Objective: The purpose of this study was to histologically analyze the influence of bioactive glass and/or a calcium sulfate barrier on bone healing in surgically created defects in rat tibias.

Material And Methods: Sixty-four rats were divided into 4 groups: C (control), CS (calcium sulfate), BG (bioactive glass), and BG/CS (bioactive glass/calcium sulfate). A surgical defect was created in the tibia of each animal.

Healing of dehiscence defects following root surface demineralization with tetracycline: a histologic study in monkeys.

Background: The purpose of this study was to histologically evaluate the healing of experimental dehiscence defects after surface demineralization with tetracycline hydrochloride.

Methods: Six adult male monkeys (Cebus apella) were used in this study. Dehiscence defects were surgically created on the buccal aspect of the mandibular lateral incisors in all animals.