Abstract This study aimed to evaluate the efficacy of a xenogeneic collagen matrix (XCM) in treating gingival recessions (GR) in a thin gingival phenotype. This double-blind, planned, controlled, split-mouth clinical trial included 30 patients with bilateral recessions, randomly assigned to a test group (extended flap + XCM) and a control group (extended flap + connective tissue graft; CTG). Root coverage at 18 months was 1.75 ± 0.8 mm (72.9%) and 2.4 ± 0.51 mm (88.9%) in the test and the control groups, respectively. The upper limit of the confidence interval was not greater than the non-inferiority margin of 0.69 mm. The increase in gingival thickness was greater for autogenous graft (p = 0.003). Both treatments improved quality of life at 18 months. The keratinized tissue width (KTW) increased significantly in the grafted teeth, in both the test (p < 0.001) and the control groups (p < 0.001). Total root coverage was similar in both groups, reaching 70% and 66.7% in the control and test groups, respectively, with no significant differences observed for partial or complete root coverage (CRC). An association was observed in the quality of the gingival phenotype at 18 months according to the treatment group, i.e., a higher percentage of cases with a thicker phenotype was observed in the control group (86.7%), compared with the test group (53.3%) (p = 0.005). XCM was effective in treating GR, but CTG had better results because of significantly increased gingival thickness and phenotypic conversion. (XCM GR (GR doubleblind, doubleblind double blind, blind double-blind planned controlled splitmouth split mouth 3 extended CTG. . CTG) 1 175 75 1.7 08 0 8 0. 72.9% 729 72 9 (72.9% 24 2 4 2. 051 51 0.5 88.9% 889 88 (88.9% respectively noninferiority non inferiority 069 69 0.6 p 0.003. 0003 0.003 003 0.003) KTW (KTW teeth 0.001 0001 001 0.001. 70 667 66 7 66.7 CRC. CRC (CRC) ie i e i.e. 86.7%, 867 86.7% , 86 (86.7%) 53.3% 533 53 (53.3% 0.005. 0005 0.005 005 0.005) conversion 17 1. 72.9 (72.9 05 5 88.9 (88.9 06 6 000 0.00 00 66. (CRC i.e 86.7 (86.7% 53.3 (53.3 72. (72. 88. (88. 0.0 86. (86.7 53. (53. (72 (88 (86. (53 (7 (8 (86 (5 (

ABSTRACT: In this study, we report the case of a patient presenting a severe atrophic mandible that was treated with short implants and stable internal fixation, without using bone grafts or biomaterials. The patient had a long history of failure of several previous consecutive treatments. Cone-bean tomography revealed a small amount of mandibular bone, suggesting a high risk of fracture of the mandible during drilling and installation of osseointegrated implants. We opted to place 5 implants (4.0 × 7.0 mm) between the mental foramens. Since the mandible presented a high risk of fracture, we inserted a titanium plate (2.3 mm) as bone reinforcement along the entire length of the mandible, including the bilateral mandibular angles. A Branemark type prosthesis was installed 5 days after the procedure. After 24 months, the patient continues to be satisfied and presents good masticatory functions without any complications.

ABSTRACT: Dento-alveolar traumas are one of the most frequent injuries to teeth, mainly affecting the upper incisors due to their exposed position in the dental arch. In such cases, esthetics, function and phonetics of anterior teeth may be compromised. Furthermore, when there is involvement of the biological width, there is often a poor prognosis. This case report describes the multidisciplinary approach to tooth fragment re-attachment in a fracture with biological width violation. The patient presented with an oblique crown fracture in the maxillary right lateral incisor, extending from the buccal to palatal side, as well as a biological width invasion. The re-establishment of the biological width was obtained by periodontal surgery to achieve clinical-crown lengthening and tooth fragment re-attachment with a glass fiber post to increase retention. After 3 years of follow-up, the rehabilitated lateral incisor remains in good condition, with satisfactory esthetic and periodontal health.