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International Journal of Periodontics & Restorative Dentistry

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https://www.readbyqxmd.com/read/27922642/threshold-values-for-the-perception-of-color-changes-in-human-teeth
#1
Daniel S Thoma, Alexis Ioannidis, Vincent Fehmer, Gioia Michelotti, Ronald E Jung, Irena Sailer
The aim of the present study was to assess the threshold values for color changes on the level of the tooth separately for laypeople, dentists, and dental technicians. Standardized presentations were made of five cases (maxilla, left to right lateral incisors) with the gingiva and teeth separated. The color parameters L (lightness), a, and b (chroma) (CIE L*a*b* parameters) of the tooth layers were adjusted to induce darker and lighter colors. In the presentations, the left part of the pictures (maxillary right central and lateral incisors) was unchanged, whereas the right part was modified...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740655/fracture-strength-failure-types-and-weibull-characteristics-of-three-unit-zirconia-fixed-dental-prostheses-after-cyclic-loading-effects-of-veneering-and-air-abrasion-protocols
#2
Fernanda Campos, Rodrigo Oa Souza, Marco A Bottino, Mutlu Özcan
The required connector dimension for zirconia fixed dental prostheses (FDPs) may be a clinical limitation due to limited space in the occlusogingival direction. Using no veneering in the gingival regions of the pontics and connectors may solve this problem. This study evaluated the mechanical durability of zirconia FDPs with and without veneering in the gingival area of the connectors and pontics and subsequent air abrasion of this region with different protocols. Models were made of resin abutments (diameter = 6 or 8 mm, height = 6 mm, 6 degrees convergence) and embedded in polyurethane resin (distance = 11 mm)...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740654/extraction-socket-management-with-buccal-plate-expansion-preliminary-results-of-a-novel-technique
#3
Alberto Fernandez Ayora, Oscar González-Martín, Eric Rompen, Geoffrey Lecloux, France Lambert
The primary objective of this pilot study was to evaluate a new socket preservation technique involving the intentional expansion of the extraction socket buccal plate using a flapless internal corticotomy and biomaterials. A total of 11 patients requiring tooth extraction were enrolled in this study. The aim of this technique was to maintain or improve the hard and soft tissue contour of the ridge after tooth extraction. All surgical sites healed uneventfully. Significant alveolar bone dimension changes were observed in the coronal region of the ridge (-1...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740653/saving-an-integrating-implant-involved-with-endodontic-implant-pathology-using-surgical-treatment
#4
Shin Hye Chung, Young-Seok Park, Kwang-Shik Bae, Seung-Ho Baek, Kee-Yeon Kum, Woocheol Lee, Won-Jun Shon
Endodontic implant pathology (EIP) refers to cases in which endodontic infections cause infections in adjacent implants, and vice versa. This case report demonstrates the successful resolution of two types of EIPs, implant endodontitis and endodontic implantitis, by endodontic intervention with surgical treatment. In case 1, the patient complained of tooth discomfort after implant placement in the adjacent tooth. The tooth was sensitive to percussion and showed slight mobility with a negative reaction to an electric pulp test...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740652/maxillary-sinus-elevation-surgery-with-chronos-and-autogenous-bone-graft-analysis-of-histometric-and-volumetric-changes
#5
Rodrigo Dos Santos Pereira, Fernanda Brasil Boos, Luis Fernado Gorla, Idelmo Rangel Garcia, Roberta Okamoto, Eduardo Hochuli-Vieira
The aim of this study was to compare the bone resorption rate and histometry of ChronOS, a beta-tricalcium phosphate (β-TCP), mixed with autogenous bone grafts (1:1) with that of autogenous bone grafts alone in maxillary sinus elevation surgery. A total of 12 maxillary sinuses were grafted with an autogenous bone graft (control group) and 9 with ChronOS mixed with an autogenous bone graft (test group). Postoperative cone beam computed tomography (CBCT) was used to measure the initial graft volume after 15 days (T₁), and 6 months later another CBCT scan was performed to evaluate the final graft volume (T₂) and determine the graft resorption rate...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740651/soft-tissue-volume-augmentation-using-connective-tissue-grafts-via-apical-pouch-technical-considerations-and-case-reports
#6
Paul P Lin, Lewis Claman, Hua-Hong Chien
The success of dental implant therapy in the esthetic zone requires not only functional osseointegration but also favorable esthetic results. The greatest challenge in the esthetic zone is to establish harmony, balance, and continuity of gingival form between implant restorations and the adjacent natural teeth. In the esthetic zone, a localized ridge defect or loss of a peri-implant papilla is common and can be corrected via soft tissue augmentation. This case report describes a novel surgical technique using connective tissue grafts via an apical pouch to increase soft tissue volume over an alveolar ridge defect or around natural teeth or implants in the maxillary anterior area...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740650/socket-preservation-with-d-ptfe-membrane-histologic-analysis-of-the-newly-formed-matrix-at-membrane-removal
#7
Domenico Laurito, Riccardo Cugnetto, Marco Lollobrigida, Fabrizio Guerra, Annarita Vestri, Francesca Gianno, Sandro Bosco, Luca Lamazza, Alberto De Biase
This study aimed to evaluate the efficacy of an exposed high-density polytetrafluoroethylene (d-PTFE) membrane in preventing epithelial migration in postextraction sockets. For this purpose, a histologic description of the newly formed soft tissue underlying the membrane is presented. The periodontal status of the adjacent teeth was also evaluated to assess the gingival response. Ten premolar extraction sockets were treated. After tooth extraction, the sockets were filled with nanocrystalline hydroxyapatite and covered with d-PTFE membranes...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740649/guided-tissue-regeneration-involving-piercing-induced-lingual-recession-a-case-report
#8
Carlos Parra, Y Natalie Jeong, Charles E Hawley
Recession on the lingual aspect of mandibular incisors may occur in patients with history of tongue piercing and other factitious traumatic habits. Treatment of these areas is challenging due to the site-specific anatomical features of the region. This case report presents a novel approach for a specific type of mandibular lingual defect caused by tongue piercing. A nonresorbable titanium-reinforced barrier membrane combined with an allograft and enamel matrix derivatives was used to promote regeneration of periodontal attachment...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740648/coverage-of-multiple-mandibular-gingival-recessions-using-tunnel-technique-with-connective-tissue-graft-a-prospective-case-series
#9
Tobias Thalmair, Stefan Fickl, Hannes Wachtel
The aim of this clinical case series was to evaluate the clinical performance of the modified tunnel technique for treatment of multiple gingival recessions in the anterior mandible. A total of 20 patients with 63 Miller Class I and II defects were treated via a modified tunnel technique with subepithelial connective tissue graft. At baseline and 6 months postoperative, recession depth, probing pocket depth, width of keratinized tissue, and gingival tissue thickness were assessed. At 6 months, the results revealed a mean recession coverage of 93...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740647/combined-regenerative-and-mucogingival-treatment-of-deep-intrabony-defects-associated-with-buccal-gingival-recession-two-case-reports
#10
Giacomo Santoro, Giovanni Zucchelli, Enrico Gherlone
The case reports presented in this article describe a surgical approach for improving root coverage and regenerative parameters in deep intrabony defects associated with buccal gingival recession. A mandibular canine and a maxillary premolar were treated. The surgical technique consisted of a connective tissue graft (CTG) that was placed and sutured at the inner surface of a coronally advanced envelope flap (CAF), thickening the buccal soft tissue wall of the most coronal extension of the intrabony defect and treated with biomaterials as scaffold...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740646/the-effect-of-osteopontin-and-an-osteopontin-derived-synthetic-peptide-coating-on-osseointegration-of-implants-in-a-canine-model
#11
Joseph P Fiorellini, Sven Glindmann, Jairo Salcedo, Hans-Peter Weber, Chang-Joo Park, Hector L Sarmiento
Osteopontin (OPN) and an OPN-derived synthetic peptide, OC-1016, have demonstrated their potential to enhance osseointegration in vitro. The purpose of this study was to evaluate bone-to-implant contact (BIC) and surrounding bone density (BD) of implants coated with either recombinant human OPN (rhOPN) or OC-1016 as compared with noncoated titanium plasma sprayed (TPS) surface in a canine model. Histomorphometric analysis revealed that at 4 weeks, %BIC and %BD of coated implants were significantly higher than those of noncoated TPS implants...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740645/frequency-of-root-surface-microgrooves-associated-with-periodontal-destruction
#12
Stephen K Harrel, Pillar Valderrama, James B Barnes, Evan L Blackwell
Small linear microgrooves have been observed on root surfaces associated with osseous defects when videoscope-assisted minimally invasive surgery (V-MIS) is performed. The aim of this study was to evaluate the frequency of occurrence of these microgrooves associated with osseous defects. Videos of dry skulls from an anatomy department collection and videos made during consecutive V-MIS procedures on patients were evaluated to determine the presence or absence of microgrooves associated with osseous defects...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740644/the-correlation-between-immediate-implant-insertion-torque-and-implant-stability-quotient
#13
Barry P Levin
Different parameters can be measured during dental implant insertion to determine the primary stability of the implant. The purpose of this retrospective study was to investigate whether a correlation exists between immediate implant insertion torque value (ITV) and implant stability quotient (ISQ) in nonmolar sites. A total of 59 implants in 52 patients were placed into extraction sockets. ITV was recorded at surgery, and ISQ was recorded at surgery and at follow up. Implants with higher ITV and/or ISQ were evaluated at 6 to 8 weeks...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740643/the-impact-of-conical-and-nonconical-abutments-on-bacterial-infiltration-at-the-implant-abutment-interface
#14
Elen Guerra, Cristiane Pereira, Renata Faria, Antonio Olavo Jorge, Marco Antonio Bottino, Renata Marques de Melo
This study evaluated the in vitro bacterial microleakage at the implant-abutment interface of three prosthetic connections: external (EH) and internal hexagon (IH) and taper connection (TC: solid [ST], taper with internal hexagon [IT], and short taper [OT]). Escherichia coli (E coli) and Streptococcus sanguinis (S sanguinus) were inoculated in the apical portion of the abutment screw, which was immersed in sterile brain-heart infusion broth for 14 days. There were no differences between the percentages of bacterial infiltration for IH (9...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740642/scarring-of-soft-tissues-following-apical-surgery-visual-assessment-of-outcomes-one-year-after-intervention-using-the-bern-and-manchester-scores
#15
Thomas von Arx, Simone Fm Janner, Stefan Hänni, Michael M Bornstein
The successful outcome of apical surgery is usually defined by absence of clinical signs and symptoms and resolution of previous periapical radiolucencies. However, little attention is given to soft tissue scarring. The present study evaluated the severity of gingival and mucosal scarring 1 year following apical surgery of 52 teeth. Clinical pictures taken at the 1-year examination were rated by three observers using specific scarring scores. The overall repeatability of the two scores was high (85.3%), whereas the overall reproducibility was relatively low (44...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740641/tissue-integration-of-a-volume-stable-collagen-matrix-in-an-experimental-soft-tissue-augmentation-model
#16
Luca Ferrantino, Dieter Bosshardt, Myron Nevins, Giacomo Santoro, Massimo Simion, David Kim
Reducing the need for a connective tissue graft by using an efficacious biomaterial is an important task for dental professionals and patients. This experimental study aimed to test the soft tissue response to a volume-stable new collagen matrix. The device demonstrated good stability during six different time points ranging from 0 to 90 days of healing with no alteration of the wound-healing processes. The 90-day histologic specimen demonstrates eventual replacement of most of the matrix with new connective tissue fibers...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740640/enamel-matrix-derivative-proteins-in-combination-with-a-flapless-approach-for-periodontal-regeneration-of-intrabony-defects-a-2-year-prospective-case-series
#17
Mario Aimetti, Francesco Ferrarotti, Giulia Mariani, Adriano Fratini, Marta Giraudi, Federica Romano
The present case series evaluated the potential benefits of a flapless approach in the regenerative treatment of residual deep intrabony defects. In each of 11 patients, one periodontal defect with an intrabony component of ≥ 3 mm was treated regeneratively using enamel matrix derivative combined with a closed surgical technique. Clinical and radiographic parameters were recorded at baseline and at 12 and 24 months postoperatively. All defects experienced favorable clinical and radiographic outcomes at the 24-month follow-up...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740639/assessment-of-marginal-peri-implant-bone-level-short-length-implants-compared-with-standard-implants-supporting-single-crowns-in-a-controlled-clinical-trial-12-month-follow-up
#18
Gerardo Mendoza-Azpur, Miguel Lau, Erick Valdivia, Jorge Rojas, Henry Muñoz, Myron Nevins
In oral rehabilitation, crown-to-root ratio is accepted as an indicator of bone loss, and this concept was transferred to implants. Recent studies have indicated that there is no significant difference between short and standard implants. The aim of this study was to compare marginal bone-level alteration through radiographic evaluation and clinical parameters between short and standard implants supporting single crowns. This prospective clinical trial study included 82 systemically healthy, nonsmoking subjects...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27740638/volumetric-calculation-of-supraimplant-submergence-profile-after-soft-tissue-conditioning-with-a-provisional-restoration
#19
Julia-Gabriela Wittneben, Urs Brägger, Daniel Buser, Tim Joda
The objective of this study was to digitally analyze the emergence profile changes before and after soft tissue conditioning with fixed-implant provisional restorations. Impressions were taken with individualized posts to build casts for 20 patients. Optical scanning of the modulated mucosa was performed from the model situations in combination with the original healing abutments. Emergence profile extension revealed a mean volume of 41.9 mm(3) for central sites and 25.8 mm(3) for laterals. In addition, linear calculations of supraimplant mucosal profile changes presented a median enlargement of 8...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27560683/clinical-use-of-laser-microtextured-abutments-a-case-series
#20
Cary A Shapoff, Jeffrey A Babushkin, David J Wohl
This article discusses the clinical use of laser-microtextured abutments on dental implant restorations. Four cases are presented, each using one of the four commercially available laser-microtextured abutment styles. Numerous preclinical and clinical studies have shown the positive effects of laser microtexturing on the implant platform in limiting crestal bone loss and benefiting soft tissue stability. Other histologic studies of laser microtexturing on the implant abutment have demonstrated the ability of this specific feature to block epithelial downgrowth and provide a functional connective tissue attachment to the abutment surface...
September 2016: International Journal of Periodontics & Restorative Dentistry
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