The Influence of Urban Gardening Activities on Participants' Perceived Restorativeness, Resilience, Sense of Community and Stress.

This study aimed to investigate the influence of urban garden activities on participants' perceived restorativeness, resilience, sense of community, and stress reduction. A total of ninety individuals who agreed to participate in the experiment were divided into experimental and control groups. To collect data, 16 sessions of urban garden activities were conducted every two weeks from May to November 2022. Perceived Restorativeness Scale, Connor-Davidson Resilience Scale, Sense of Community Index, and Brief Encounter Psychosocial Instrument were employed to measure participants' psychological effects. To evaluate physiological effects, salivary cortisol tests were performed. The results of the study revealed that urban gardening activities influenced on participants' physiological and psychological reactions in positive ways.

Digital workflow for creating a coolant channel for direct irrigation through an implant surgical guide.

Heat elicited during the osteotomy for implant placement may have a significant impact on the vitality of surrounding bone and on the healing capacity for osseointegration. This article describes a digital workflow for creating a coolant channel for the direct irrigation of the osteotomy site through an implant surgical guide. This technique can be particularly advantageous when the surgical guide restricts access for direct irrigation of the osteotomy site.

EVIDENCE IS INSUFFICIENT WITH THE ASSOCIATION BETWEEN CANTILEVER TO ANTERIOR-POSTERIOR RATIO AND CLINICAL OUTCOMES OF FIXED IMPLANT-SUPPORTED FULL-ARCH PROSTHESIS.

ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: Walter L, Greenstein G. Utility of measuring anterior-posterior spread to determine distal cantilever length off a fixed implant-supported full-arch prosthesis: A review of the literature. J Am Dent Assoc. 2020 Oct;151(10):790-795. doi:10.1016/j.adaj.2020.06.016. PMID: 32979958. SOURCE OF FUNDING: Unknown. TYPE OF STUDY/DESIGN: Systematic review.

Loss of abutment teeth for double crown-retained removable partial dentures compared to clasp-retained removable partial dentures: a systematic review and meta-analysis.

Objective: To analyze the loss of abutment teeth for double crown-retained removable partial dentures (DC-RPDs) compared to clasp-retained removable partial dentures (C-RPDs). Method and materials: A search was conducted in the Ovid MEDLINE, Embase, Web of Science databases, and a manual search. The search was conducted based on the PICO framework with inclusion and exclusion criteria. After extracting the data of selected studies, a meta-analysis was performed to estimate abutment loss with 95% confidence interval (CI). The statistical significance was defined as P < .05, and the heterogeneity of the data was assessed based on the chi-squared test and I2 statistics. Risk of bias assessment was conducted using Cochrane Risk of Bias tool and Newcastle-Ottawa Scale. Results: A total of 4,692 records were identified from electronic databases and 38 studies were included for quantitative synthesis of 3,393 subjects with 13,552 abutment teeth. A total of 1,226 abutment teeth were lost with > 4,016 RPDs. Seven studies were compounded for > 668 C-RPDs (mean follow-up time ≤ 5 years) and six studies for 893 C-RPDs (mean follow-up time < 5 years), where the estimates of abutment loss were 5% (95% CI 2% to 8%) and 8% (95% CI 5% to 13%), respectively. The data were not significantly different (P = .1), and were heterogenous between the studies (τ2 ≥ 0.34, I2 ≥ 87.38%). Thirteen studies were compounded for 1,223 DC-RPDs (mean follow-up time ≤ 5 years) and eight studies for 1,033 DC-RPDs (mean follow-up time > 5 years), where the estimates of abutment loss were 6% (95% CI 5% to 8%) and 12% (95% CI 8% to 18%), respectively. The data were heterogenous (τ2 ≥ 0.17, I2 ≥ 75.86%), and were significantly different between the studies (P = .005). Overall, C-RPDs were not significantly different from DC-RPDs in abutment loss (P ≥ .3). A significant predictor for abutment loss was follow-up time with DC-RPDs (P = .005), where the risk of abutment loss per year was 18% (P = .0001). In contrast, follow-up time was not a significant factor for C-RPDs (P = .1). None of the included studies were at high risk of bias. Conclusion: Within the limitations of the current systematic review and meta-analysis, abutment loss was not significantly different between C-RPDs and DC-RPDs. A significant predictor was follow-up time for DC-RPDs, whereas this factor was not significant for C-RPDs. Further research is needed to investigate critical factors for abutment loss with RPDs.

Loss of nonvital abutment teeth for removable partial dentures: a systematic review and meta-analysis.

OBJECTIVE: To analyze the loss of nonvital abutment teeth compared to vital abutment teeth supporting removable partial dentures (RPDs). METHOD AND MATERIALS: An electronic search was conducted in the Ovid MEDLINE, Embase, and Web of Science databases, and supplemented by a manual search. The search was done to identify clinical studies reporting the loss of nonvital abutment teeth compared to vital abutment teeth for RPDs. The data were extracted from each selected article and meta-analysis was performed using a random effects model to estimate adjusted proportion of abutment loss with RPDs along with 95% confidence interval (CI). Risk of bias assessment was conducted using Cochrane Risk of Bias tools and Newcastle-Ottawa Scale. The statistical significance was set as P value < .05. RESULTS: A total of 3,898 records were identified from electronic databases and 8 studies were included for quantitative synthesis of 834 subjects with 1,036 RPDs. No additional records were identified through manual search. Among 1,152 nonvital abutment teeth, 123 teeth were lost. The estimate of nonvital abutment loss was 13% (95% CI 9-18%]. The data were statistically significant (P < .0001), and were heterogenous between the studies (χ2 [df = 7] = 35.9, P < .0001; τ2 = 0.25, I2 = 76.46%). A total of 2,186 vital abutment teeth were compounded where 114 teeth were lost. The estimate of vital abutment loss was 4% (95% CI 2-7%). The data were statistically significant (P < .0001), and were heterogenous between the studies (χ2 [df = 7] = 23.7, P = .01; τ2 = 0.56, I2 = 86.31%). The risk of abutment loss was approximately three times greater with the loss of vitality (odds ratio = 3.04, 95% CI 1.53-6.05; P = .001). In addition, abutment loss was significantly greater with increasing follow-up time (P = .01). None of the included studies were considered to be at high risk of bias. CONCLUSION: Within the limitations of this systematic review and meta-analysis, the loss of nonvital abutment teeth was significantly greater than that of vital abutment teeth for RPDs. Further research is needed to identify critical factors associated with the loss of nonvital abutment teeth.

Open Proximal Contact with Implant-Supported Fixed Prostheses Compared with Tooth-Supported Fixed Prostheses: A Systematic Review and Meta-analysis.

PURPOSE: To investigate the odds of developing open proximal contact (OPC) between implant-supported fixed prostheses and adjacent teeth compared with that between tooth-supported fixed prostheses and adjacent teeth. MATERIALS AND METHODS: A search was conducted in the Ovid MEDLINE, Embase, and Web of Science databases for clinical studies on OPC developed with implant-supported prostheses or tooth-supported prostheses. A meta-analysis was performed using statistical software to estimate the odds of developing OPC with implant-supported prostheses compared with tooth-supported prostheses, with a 95% confidence interval (CI). The statistical significance was defined as P < .05. RESULTS: The odds ratio (OR) of developing OPC with implant-supported prostheses was 2.46 compared with tooth-supported prostheses (95% CI [1.21 to 5.01]; P = .013]. However, the data were highly heterogenous (τ2 = 0.40, I2 = 95.67%). The total estimates of developing OPC were 41% (95% CI [30% to 54%]) with implant-supported prostheses and 22% (95% CI [18% to 26%]) with tooth-supported prostheses. OPC was more prevalent at the mesial side than at the distal side of implant-supported prostheses (OR = 2.38, 95% CI [0.94 to 6]; P = .066), whereas OPC was more prevalent at the distal side than at the mesial side of tooth-supported prostheses (OR = 1.94, 95% CI [1.09 to 3.45]; P = .024). There was no statistically significant difference in developing OPC with covariates of sex, age, arch, splinting of implants or adjacent teeth, region, and vitality of adjacent teeth, retention type, opposing dentition, occlusal force, parafunctional activities, and follow-up time. OPC was found to increase 9% per year with implant-supported prostheses (OR = 1.09). The estimate of interproximal gap next to implant-supported prostheses was 245.8 µm (95% CI [86.4 to 405.3 µm]). CONCLUSION: Within the limitations of this systematic review and meta-analysis, the odds of developing OPC were significantly higher with implant-supported prostheses than with tooth-supported prostheses. However, the data were highly heterogenous, and thus, a well-designed randomized clinical study needs to be conducted to validate the results of this systematic review.

Bone loss in the anterior edentulous maxilla opposing two-implant-supported overdentures vs complete dentures: a systematic review and meta-analysis.

OBJECTIVE: To investigate bone loss in the anterior edentulous maxilla restored with maxillary complete dentures and opposed by mandibular two-implant-supported overdentures (2-IODs) or complete dentures. METHOD AND MATERIALS: A systematic search was conducted using the Ovid MEDLINE, Embase, Web of Science, CINAHL, and Cochrane databases for studies investigating bone loss in the anterior edentulous maxilla with mandibular 2-IODs or complete dentures. Two reviewers assessed the eligibility of studies and risk of bias assessment was conducted according to the Newcastle-Ottawa Scale. A meta-analysis was performed using statistical software to estimate weighted mean difference in bone loss with 95% confidence interval (CI). The level of significance was defined as P value (< .05). RESULTS: A total of 2,510 studies were identified through electronic and manual searching. Six studies were selected and compounded for quantitative synthesis of 163 patients. Bone loss in the anterior edentulous maxilla was greater with 2-IODs than with complete dentures. The total estimate of weighted mean difference between 2-IODs and complete dentures was -1.40 (95% CI -3.12 to 0.31). However, the difference was not statistically significant (P = .11). The data were heterogenous across the studies based on chi-square statistics (χ2 [df = 7] = 52.75, P < .0001; τ2 = 5.53, I2 = 95.21%). In addition, the impact of implant splinting on bone loss was not significant (P > .29). None of the included studies were considered to be at high risk of bias. CONCLUSION: Within the limitations of the current systematic review and meta-analysis, the estimate of bone loss in the anterior edentulous maxilla was greater with 2-IODs than with complete dentures. However, the difference was not statistically significant. A well-designed randomized clinical study needs to be conducted to validate the results of this systematic review.

Cement Type (Adhesive vs. Conventional) May Not Affect Clinical Performance of Zirconia and Lithium Disilicate Tooth-Supported Crowns.

ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: Effect of cement type on the clinical performance and complications of zirconia and lithium disilicate tooth-supported crowns: A systematic review. Report of the Committee on Research in Fixed Prosthodontics of the American Academy of Fixed Prosthodontics. Maroulakos G, Thompson GA, Kontogiorgos ED. J Prosthet Dent 2019;121:754-65. SOURCE OF FUNDING: Unknown. TYPE OF STUDY/DESIGN: Systematic review.

Digital Workflow for Retrofitting a Surveyed Crown Using a Removable Partial Denture as an Antagonist.

Digital workflow expedites the procedure of retrofitting a surveyed crown against an existing removable partial denture (RPD). This article describes a simple and straightforward technique of digital workflow where an existing RPD is scanned as an antagonist to design the rest seat, guide plane, and height of contour of a surveyed crown.

Bone Loss in the Posterior Edentulous Mandible with Implant-Supported Overdentures vs Complete Dentures: A Systematic Review and Meta-Analysis.

PURPOSE: To analyze the current evidence on bone loss in the posterior edentulous mandible restored with complete dentures (CDs), two-implant-supported overdentures (2-IODs), or four-implant-supported overdentures (4-IODs). MATERIALS AND METHODS: A search was conducted in the Ovid MEDLINE, Embase, Web of Science, CINAHL, and Cochrane databases for clinical studies comparing bone loss in posterior edentulous mandibles restored with CDs, 2-IODs, or 4-IODs. A meta-analysis was performed using statistical software to estimate the mean differences in bone loss with 95% CI. The level of significance was set at P < .05. RESULTS: The search strategy identified 2,806 articles, of which 14 met the inclusion criteria. The meta-analysis included 7 two-arm studies comparing CDs vs 2-IODs or 2-IODs vs 4-IODs. No statistically significant difference was found in bone loss between 2-IODs and CDs (mean difference -0.25 [95% CI -0.85 to 0.36]; P = .43), whereas bone loss was significantly lower with 4-IODs than with 2-IODs (mean difference -0.96 [95% CI -1.86 to -0.06]; P = .04). Overall, the data were highly heterogenous (I2 > 74%). CONCLUSION: 4-IODs can benefit the patient by decreasing bone loss in the posterior edentulous mandible. However, 2-IODs may not be superior to CDs in reducing bone loss in the posterior mandible. A validation of these results is needed through well-designed RCTs.

Hanau Quint Described as a Formula to Quantify Balanced Occlusion.

Balanced occlusion is obtained through the interrelationship of the Hanau quint, which includes condylar guidance (CG), incisal guidance (IG), orientation of occlusal plane (OP), compensating curve (CC), and cuspal incline (CI). Once CG and IG are determined, the other three factors of OP, CC, and CI function among each other to balance the occlusion. This article describes a formula that is introduced to quantify a balanced occlusion within the context of the Hanau quint and discusses the limitations of the formula due to individual variabilities of mandibular movements.

Treatment of velopharyngeal dysfunction: A clinical report.

Current tumor therapies can impair velopharyngeal function and lead to the development of hypernasality and nasal regurgitation. This article describes a prosthetic restoration of velopharyngeal dysfunction with a multidisciplinary approach including a speech pathologist and videofluoroscopic and nasal endoscopic procedures.

Recording an accurate maxillomandibular relationship by adding vertical stops to the occlusal rims.

Complete denture fabrication includes accurate recording of the maxillomandibular relationship to ensure the functional requirements of occlusion and minimize the traumatic effects on the residual alveolar ridges. However, errors may occur when the occlusal rims have uneven and nonuniform occlusal contacts. The technique described is a straightforward method for recording an accurate silicone centric relationship record with dome-shaped baseplate wax added as vertical stops on the occlusal surface of the mandibular occlusal rim.

A technique for verifying the accuracy of the virtual mounting of digital scans against the actual occlusal contacts.

The digital scans of dentate arches can be mounted from a virtual interocclusal record to expedite the fabrication of dental prostheses. However, the virtual mounting may develop an occlusal error when combined with less than ideally scanned data and an algorithm that matches poorly. This article describes a method of verifying the accuracy of virtual mounting against the actual occlusal contacts marked with colored articulating paper.

Multiple Disconnections/Reconnections of Implant Abutment May Induce Recession of Peri-implant Mucosa.

ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: Abutment Disconnection/Reconnection Affects Peri-implant Marginal Bone Levels: A Meta-Analysis. Koutouzis T, Gholami F, Reynolds J, Lundgren T, Kotsakis GA. Int J Oral Maxillofac Implants 2017;32(3):575-81. SOURCE OF FUNDING: The authors declared no conflict of interest TYPE OF STUDY/DESIGN: Systematic review with meta-analysis of data.

Recording and reproducing cast orientation by using an implant impression coping and implant analog: A dental technique.

For the fabrication of a removable partial denture, the orientation of a definitive cast should be recorded and reproduced to indicate the most desirable path of placement and undercut areas. This article describes a straightforward and accurate method of recording and reproducing the cast orientation by using an implant impression coping and an implant analog.

Prosthodontic treatment of a retrognathic edentulous maxilla demonstrating limited interarch distance: 3.5-year results with fixed and removable implant prostheses.

The prosthodontic treatment of patients with a retrognathic edentulous maxilla should consider the restoration of the lower facial profile and access for oral hygiene. This clinical report describes prosthodontic treatments of a patient with edentulism who presented with repeated fractures of the denture teeth of a maxillary implant-supported complete fixed dental prosthesis (ICFDP) and a mandibular implant-supported overdenture. Considerable plaque accumulation was noted on the ICFDP, which was replaced with an open palatal design implant-supported overdenture. However, the patient experienced difficulty managing the 2 removable prostheses. The patient's mandible was eventually restored with a milled titanium alloy framework ICFDP with metal occlusal surfaces. This combined approach of fixed and removable prostheses was stable at 3.5-year follow-up appointment, without compromising the patient's oral hygiene or comfort.

Comparison of Clinical and Radiographic Outcomes of Platform-Switched Implants with a Rough Collar and Platform-Matched Implants with a Smooth Collar: A 1-Year Randomized Clinical Trial.

PURPOSE: The aim of this study was to evaluate and compare the clinical and radiographic outcomes of single implants with a platform-switched rough collar (PSRC) and a platform-matched smooth collar (PMSC). MATERIALS AND METHODS: Twenty-six patients missing a tooth in the anterior maxilla (through the premolars) were randomly assigned to the PSRC or the PMSC group. All implants were placed in a flapless approach and restored with an early loading protocol. Clinical measurements were performed at surgery, loading, and at 3, 6, and 12 months after loading. In addition, radiographic evaluations were carried out using standardized periapical radiographs and cone beam computed tomography. Patient satisfaction surveys were completed, and microbial analysis with DNA probes was performed. RESULTS: The implant survival rate was 100% for both groups. The mean marginal bone level (MBL) was significantly higher in the PSRC group compared to the PMSC group at all time points. From the 2-week postoperative visit to 1 year postloading, the mean MBL change in the PSRC group was 0.21 ± 0.56 mm and in the PMSC group it was 0.74 ± 0.47 mm. Soft tissue profiles were stable over time, with no significant differences between groups. There were no significant differences between groups in the number of microbial species seen. Patients in both groups were highly satisfied with postoperative and postprosthetic experiences. CONCLUSION: In this study, the PSRC method preserved marginal bone by a mean of 0.53 mm more than the standard PMSC protocol. Within the limitations of the present study, it can be concluded that the PSRC protocol may be beneficial in marginal bone preservation. Longitudinal studies are needed to verify the long-term effects of this approach.

Impact of implant support on mandibular free-end base removable partial denture: theoretical study.

OBJECTIVES: This study investigated the impact of implant support on the development of shear force and bending moment in mandibular free-end base removable partial dentures (RPDs). MATERIAL AND METHODS: Three theoretical test models of unilateral mandibular free-end base RPDs were constructed to represent the base of tooth replacement, as follows: Model 1: first and second molars (M1 and M2); Model 2: second premolar (P2), M1, and M2; and Model 3: first premolar (P1), P2, M1, and M2. The implant support located either at M1 or M2 sites. The occlusal loading was concentrated at each replacement tooth to calculate the stress resultants developed in the RPD models using the free-body diagrams of shear force and bending moment. RESULTS: There was a trend of reduction in the peak shear force and bending moment when the base was supported by implant. However, the degree of reduction varied with the location of implant support. The moment reduced by 76% in Model 1, 58% in Model 2, and 42% in Model 3, when the implant location shifted from M1 to M2 sites. CONCLUSIONS: The shear forces and bending moments subjected to mandibular free-end base RPDs were found to decrease with the addition of implant support. However, the impact of implant support varied with the location of implant in this theoretical study.