MIDEC 2024 Abstracts

P001 Digital Workflow for Designing Stereolithographic Templates in Computer-assisted Tooth Reduction for Porcelain Laminate Veneers: A Scoping Review Guan Xin, I. M. Tew, Y. H. Beh Department of Restorative Dentistry, Faculty of Dentistry, National University of Malaysia, Kuala Lumpur, Malaysia Introduction: Tooth reduction guide is essential for enamel preservation during tooth preparation of porcelain laminate veneers to ensure a long-term success. Studies on clear digital workflows for designing stereolithographic templates in computer-assisted tooth reduction for porcelain laminate veneers are lacking. Objective: The purpose of this scoping review was to identify the publications that described a digital workflow on computer-assisted tooth reduction for laminated porcelain veneers. Methodology: A systematic search was conducted in MEDLINE/PubMed, Web of Science and Scopus to identify articles published between year 2014 to March 2024 in the English language. The recruited articles met the eligibility criterion of articles that digitally designed and fabricated tooth reduction guides in tooth preparation for porcelain laminate veneers. Articles reporting on a conventional tooth preparation procedure or digitally designed guides for tooth reduction assessment were excluded. Results: Seven clinical reports met inclusion criteria. The software used for designing stereolithographic templates varied among the included articles. Four articles favored ExoCad dental software, while other three used Meshmixer, Viax Dental Technologies, and 3Shape software respectively. Prior to designing templates, only four articles incorporated virtual tooth preparation. Most articles reported fabricating a single template while the other two articles reported designing a series of templates for step-by-step tooth preparation. Two articles described tube designs, two articles featured cross shapes, one article applied the first-fit system technique, and the remaining two used open window and access designs. All articles reported printing the templates using resin with various types of 3D printers. The limitations of the templates varied depending on their designs, fabrication, and application in clinical practice. Conclusion: There is a lack of standardization in the digital workflow for designing stereolithographic templates for laminated porcelain veneers, largely due to significant variability in the software and method used, as well as the number and designs of the templates. Keywords: Computer-aided design and computer-aided manufacturing, dental esthetic, tooth reduction, veneer P002 The Clinical Behaviour and Survival of Computer-aided Design and Computer-aided Manufacturing Hybrid Ceramic Restorations on Endodontically Treated Teeth: A Systematic Review and Meta-analysis Jonathan Yuen Jun Xian1, Z. K. Saw2, H. S. Chua3, Y. H. Beh4 1Klinik Pergigian Trong, Ministry of Health, Perak, Malaysia, 2Trong Dental Clinic, Ministry of Health, Perak, Malaysia; Bagan Serai Dental Clinic, Ministry of Health, Perak, Malaysia, 3Marang Dental Clinic, Ministry of Health, Terengganu, Malaysia, 4Department of Restorative Dentistry, Faculty of Dentistry, National University of Malaysia, Kuala Lumpur, Malaysia Introduction: Hybrid ceramics seek to combine the mechanical and optical properties of ceramics and composites to mimic natural teeth. Given the novelty of this restorative material, an evaluation of their clinical performance is warranted. Objective: This systematic review was to assess the survival of computer-aided design and computer-aided manufacturing (CAD-CAM) hybrid ceramic restorations on endodontically treated teeth and to describe the incidence of complications. Methodology: The study was registered in PROSPERO and adhered to PRISMA guidelines. A comprehensive search across six online databases was performed. Clinical studies which involved CAD-CAM hybrid ceramic restorations on endodontically treated teeth were included. Several investigators independently conducted the study selection, data extraction, and quality assessment processes. Risk of bias were assessed using Cochrane RoB 2 tool and Newcastle-Ottawa Scale. Failure rates were analysed using Poisson regression models to obtain summary estimates of 3- and 5-year survival proportions which were pooled using a random-effects model. Subgroup analysis was performed between two hybrid ceramic materials, resin nanoceramic (RNC) and polymer infiltrated ceramic network (PICN). Results: The search resulted in 250 studies after duplicate removal. Full-text analysis was performed for 24 articles and 11 articles were included in the final analysis. Meta-analysis of 289 restorations revealed an overall estimated failure rate of 3.44 (95% confidence interval [95% CI]: 2.67–4.21) per 100-restoration years, translating to a survival rate of 90.2% (95% CI: 88.1–92.3%) after 3 years and 84.2% (95% CI: 81.0–87.5%) after 5 years. A significantly higher (p < 0.05) failure rate was reported for RNC (5.97%, CI: 3.52–8.41%) compared to PICN restorations (1.61%, CI: 0.87–2.36%). Restoration debonding was the main reason for failure. Conclusion: Restoring endodontically treated teeth with CAD-CAM hybrid ceramic restorations have an acceptable survival rate, however debonding was a common complication. PICN restorations have a statistically significant higher survival rate than RNC restorations. Keywords: Computer-aided design and computer-aided manufacturing, endodontically treated teeth, hybrid ceramics, survival P003 Clinical Effectiveness of Different Types of Maxillary Protraction Devices in Cleft Patient: A Systematic Review and Meta-analysis M. M. Ashwini1, A. N. Mohamad Arif2, R. Ahmad Hashridz3 1Department of Paediatric Dentistry Unit, School of Dental Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, Kelantan, Malaysia, 2Department of Biostatistics Unit, School of Dental Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, Kelantan, Malaysia, 3Department of Orthodontics Unit, School of Dental Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, Kelantan, Malaysia Introduction: Maxillary hypoplasia is a common challenge in patients with cleft lip and palate (CLP), significantly impacting facial aesthetics and function. Adolescents with this condition often require maxillary protraction therapy to improve maxillary growth and correct malocclusion. Objective: This study aims to evaluate and compare the clinical effectiveness of facemask with mini plates (FM-MP) and class III elastics with mandibular and maxillary mini plates (C3-IE) in adolescents with CLP. Methodology: A systematic review and meta-analysis were conducted following PRISMA guidelines. Five databases such as Scopus, Web of Science, PUBMED/Embase, Google Scholar and Cochrane Library were searched for relevant studies from 2012 to 2024. Inclusion criteria encompassed prospective and retrospective studies focused on maxillary protraction devices in CLP patients. The quality of included studies was assessed using the Newcastle Ottawa Scale (NOS) and GRADE system. Data from five eligible studies were analyzed, with cephalometric measurements compared between intervention and control groups using a random-effects inverse-variance model. Results: The meta-analysis revealed significant improvements in maxillary protrusion and correction of class III malocclusion post-treatment. The FM-MP subgroup showed more pronounced changes in SNA, 2.14 degrees (95% CI: 0.97–3.31, p-value=0.003), ANB (improved 1.75 degrees), and overjet compared to the C3-IE subgroup. However, no significant differences were observed in the vertical dimension alterations or mandibular rotation (p-value>0.05). The facemask with mini plates (FM-MP) was more effective in enhancing overjet compared to class III elastics with bone anchors. Conclusion: Maxillary protraction therapy is effective for adolescents with CLP, with FM-MP showing superior results in certain parameters compared to C3-IE. These findings support the use of maxillary protraction devices as viable treatment options to address maxillary hypoplasia and class III malocclusion in CLP patients. Further studies are recommended to confirm these results and refine treatment protocols. Keywords: Class III elastics, cleft lip, cleft lip and palate, facemask, maxillary protraction device P004 Supragingival Bacterial Microbiota around Dental Implants and the Adjacent Tooth in Patients with a History of Periodontitis Nicholas Sim Choo Wee1, A. M. Anis Rageh2, S. Eshamsul1, M. H. Norul Husna1, S. Syarida Hasnur1 1Department of Restorative Dentistry, Faculty of Dentistry, Universiti Malaya, Kuala Lumpur, Malaysia, 2Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia Objectives: The aim of this study was to investigate a causal link between the oral microbiota dysbiosis and the risk of peri-implantitis in patients with a history of periodontitis. Materials and Methods: Subjects with a history of periodontitis (Test) and periodontally healthy subjects (Control) were recruited to receive either of two types of dental implants with different surface characteristics: sandblasted, large grit and acid-etched (SLA) or precision dimension laser-treated (PDL). Periodontal clinical measurements were recorded at baseline (V1), 3 months after implant placement (V4), at zirconia crown placement (V6) and 3 months after zirconia crown placement (V8). Supragingival bacterial microbiota was studied using Illumina MiSeq sequencing. Results: Supragingival microbial community on SLA implants in the test group significantly differed to the control group at V8 (p < 0.05). After three months of zirconia crown restoration (V6 to V8), a longitudinal shift of the supragingival bacterial microbiome displaying microbial dysbiosis occurred on the SLA implants (p < 0.05) and the adjacent teeth (p < 0.05) among test patients. Supragingival bacterial microbiome on PDL implants and the respective adjacent tooth did not differ significantly between test and control groups from V6 to V8 (p > 0.05). Co-occurrence network in the test group of SLA implants at V8 and the adjacent tooth displayed increased disease-associated bacteria and reduced health-associated bacteria. Health-associated bacteria were dominant in the control group of SLA implants at V8. Conclusion: The surface characteristics and prosthetic component of dental implants could be considered as important risk factors for the onset of microbial dysbiosis in patients with a history of periodontitis. Dysbiosis of supragingival microbiome in patients with a history of periodontitis may predispose dental implants to peri-implant mucositis or peri-implantitis, thus, a strict supportive periodontal care plan is imperative for these patients to prevent early onset of biological complications around dental implants. Keywords: 16s rRNA gene sequencing, adjacent tooth, history of periodontitis, implant, supragingival microbiota P005 The Effects of Head and Neck Radiotherapy towards Oral Mucosal Wetness and Development of Post-radiation Caries Chien Wen Ni, R. G. Dharmindra Department of Oral and Maxillofacial Surgery, Pantai Hospital Ayer Keroh, Malacca, Malaysia Introduction: Radiotherapy is a treatment modality largely used in and However, that is used may in in the oral The clinical of and and Objective: The of this study is to the oral and of in the oral after of and Methodology: method series The study subjects at Pantai Hospital Ayer Keroh, and 2012 year and at one Clinical were was the study and for clinical was The Scale of Clinical Oral Results: Clinical Oral patients and showed of the of the subjects of while the remaining of of the subjects from to and patients a in the of Conclusion: treatment of and to a in rate, the risk of which the quality of dental and is recommended in to or prevent the Keywords: and of in the Paediatric Dental S. Department of Paediatric Malaysia Introduction: as is a condition the is and than in and may to with Objective: This is an the of that were to the Paediatric Dental Methodology: A retrospective analysis was performed on dental of patients to the with from to Data on as well as were The of was assessed using the and and Results: A of patients were and a was in of patients. The from months to 11 months to 2 years and years and was used to the from and Most were findings and in as reason for The were from the Hospital and Health from the or were in of with in reported Conclusion: is a common among and which may to of is is as well as the of were a are to to their or for are to and with in these Keywords: between Periodontal and Risk among A K. 1Klinik Malaysia, Malaysia Introduction: Periodontal is a bacterial of the of the teeth which and on National Oral Health for of are could a quality of and tooth factors could to the of periodontal Objective: The of this study is to the between periodontal and risk factors among Methods: A retrospective study clinical and from year to and of periodontal of were Clinical such as and be included in data from and were included in this and clinical be excluded. Data were analysis using with as Results: A of of years. differences were recorded between periodontal with and with and history are with periodontal Conclusion: dental at or community in and early intervention of periodontal Oral be to of periodontal in intervention and treatment of periodontal quality of and prevent early tooth Keywords: periodontal risk and Risk of Maxillofacial and Dental in and Systematic Review and Meta-analysis H. G. S. S. N. S. Ahmad 1Department of Paediatric Dentistry and Faculty of Dentistry, University Campus, Malaysia, 2Department of Restorative Dentistry, of Dentistry, University Malaysia, Malaysia, Dental Clinic, Pergigian Ministry of Health Malaysia, Terengganu, Malaysia, Dental Clinic, Pergigian Ministry of Health Malaysia, of Malaysia, of Paediatric Dentistry, Kuala Lumpur, Malaysia Introduction: Maxillofacial and dental are among and Objective: This systematic review to investigate the and risk factors of and in and Methodology: This review was registered in the of Systematic were conducted across Google Scopus, Web of Science, Cochrane and and to with inclusion criteria to English The was to evaluate the risk of bias in the included studies Meta-analysis was using the random-effects analysis to assess across The of was using the of and Results: studies that met the inclusion criteria were patients with and patients with All studies were included in the were assessed as a risk of and the remaining five were as a risk of The rates for and dental were and respectively. data was from to However, analysis that the of included study no significant on the data for and dental (p and Conclusion: studies have the of and among the to be and with the quality of considered to be to Keywords: systematic dental the of Dental A the S. N. H. Z. Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia Dental are the of dental are dental and a for and have not or as are with the of their of dental as and The to these may dental to of and and from the Given the on and in and dental and an is to these to dental their and plan their Objective: This study aims to the of dental using the Methods: in the and in the was on from to these the four main of dental encompassed a of a Conclusion: The application of not only the of to the of dental their to the and their Keywords: dental A Health or A Health N. A. R. A. 1Department of Dental and Faculty of Dentistry, University Malaya, Kuala Lumpur, Malaysia, 2Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia, This study the between and in the of their and on The use of these the for in and the Objective: The is to compare and their and to these the effectiveness of and Methodology: The a review from to from articles and criteria and to Health and Health such as and across databases and Google articles were that of the Health however after only articles were that of the such as and Data relevant and to and analysis. However, be that the and were used in of the articles. this study applied the to Results: The results significant differences between Health and Health Health clinical or on the of from a and Health often degrees or in have no clinical and from a are around and are essential to the Health while Health and findings that to more and as than these the effectiveness of and in and are recommended to support and in Keywords: Oral an with R. Department of Oral and Perak, Malaysia is a of Oral with a of clinical and is a reduction of Patients with have of and oral of is at the and of A at Oral and Maxillofacial Hospital with of for 3 and to have oral with and and and of and surface of was and as oral was for this which included application of of were no of of the with is for of be clinical and However, more are for which not well to treatment to other Keywords: oral The of in Oral and Maxillofacial A M. K. Department of Oral Surgery, Hospital Malaysia Introduction: The is a used in due to and effectiveness in and This series the application of in the of various facial and in oral and This series from an and two patients. A with on the and The was and with an while the was and with a A with in on the an with a using a A with a on the The was and a was used for a for a significant The for while Conclusion: The is a and for facial following the of various and This series in and results in oral and The design for with in with These the and as a in the Keywords: oral and of Maxillary Jun of Clinical Oral Health Sciences, School of Dentistry, Kuala Lumpur, Malaysia, 2Department of Faculty of Dentistry, Malaysia intervention of an maxillary is to with of the adjacent teeth and This series the clinical of a in this and All three involved patients to years with an and a history of dental was to the of the The treatment more is for the There was of the treated with vertical review the for a with and a as Conclusion: for of an maxillary a is often treatment and be with the for an Keywords: of K. Department of Oral Surgery, Hospital Perak, Malaysia a of and which are which as are are with growth and in and in the oral This is a of a of in a year which occurred for with a to on the in to and teeth. The was and the were of and Conclusion: be treated the adjacent are Keywords: oral for in of Maxillary Yuen A. R. S. Department of Dental Malaysia a in the and of teeth. The teeth are to due to their in the dental This the of tooth 11 and in a a and crown following a the treatment at the and were applied to the teeth. the was to the Restorative at Pergigian for comprehensive the treatment and were performed on tooth 11 and restorations. was conducted in with the of Dental guidelines. Conclusion: The findings of this the of and the of in complications. a the long-term of these teeth. Keywords: in the of a A I. A. K. Department of Malaysia Introduction: tooth extraction, of the This may to of the and in dental preservation be considered to vertical and dimension of the following tooth which in implant placement while component in the Objective: and the of crown which following of one of the teeth while the Methodology: A was a for of periodontal periodontitis, revealed that a crown on and a due to at the After of periodontal was preservation using bone The tooth of the was and with was after 2 and 3 months after the Results: 3 months clinical findings showed a with an of the and preservation of vertical and of the The and Conclusion: the following tooth in vertical and dimension of the and the Keywords: bone for from a in a University Hospital M. K. Department of Oral and Maxillofacial Clinical Sciences, Faculty of Dentistry, Universiti Malaya, Kuala Lumpur, Malaysia Introduction: to an or between the oral and the maxillary that from various dental the of maxillary teeth. an and may an in which a more to complications and in and often and effective treatment to the and prevent may intervention to the and prevent complications. treatment for the of is the use of is a that properties in and the of the application of as a and effective of the between the oral and maxillary This series three clinical patients were for of maxillary from was used as a and a for the of The patients were and of the was observed or in and a natural for The and of using for in in of reduced and a for the of Keywords: with A K. M. Mohamad Department of Oral and Maxillofacial Surgery, Hospital Malaysia is a as the and may or may not be with and dental The of this the The is often to factors or may during the of the years. The may during at years of have the of this and therapy may be the at certain this may be recommended to correct the of the This reporting a of in the with and on of the The characteristics the of with history of during early Conclusion: is during the of this and to Keywords: with for of Ahmad I. M. H. A. K. 1Department of Dental Malaysia, 2Department of Dental Health, Dental Malaysia Introduction: of reported to be to and the with is the is not This series with as an A with class on class was treated with and with on the of and periodontal therapy on was performed using a with months and of were conducted to the and A with class on class was treated with with on and After was on using a with months of and were the the of may to between the treated and the adjacent superior with the and Conclusion: with be an to the with in with and in Keywords: The of A of Two Clinical Z. A. Ahmad I. A. K. A. S. 1Department of Dental Malaysia, 2Department of Dental Health, Dental Malaysia, 3Department of Unit, of Medical Health Malaysia Introduction: are common in clinical and due to their varied or clinical may at the is not This series the for evaluation and of of their clinical A with periodontitis III with a that increased in for the three months in the of teeth that The and to the the crown of tooth periodontal therapy was performed an which revealed a months the healthy with no The was supportive periodontal care for A with periodontitis with a in the of teeth The the and was After a procedure a bone The and bone were and for The that the was was a or The was to an oral for and months the healthy with no of Conclusion: These that not be and is essential for and significantly Keywords: on the A to the of Y. Department of Dentistry, Kuala Kuala Malaysia is of bacterial the of a or an are a of bacterial in the to is in healthy with only six of the facial A with facial from an on a the at the an to facial revealed a a on the of lip, and to the history was The and results an than an to the A for and revealed the of A of and an was showed in of the was performed with and was was observed on the two months during are to due to the of and of may from or in patients. This the of the of early the of and effective for enhancing Keywords: Oral in Paediatric Dental Patients with or S. M. A. H. I. 1Department of Dentistry, School of Dental Sciences, University Sains Malaysia, Kubang Kerian, Kelantan, Malaysia, 2Department of and Hospital Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia Introduction: is one of the important to the for to this There is on the of these different to the of oral Objective: The aim of this study is to assess the of oral in different in dental patients. Methodology: patients 3 to years in this were two which the group and The used was per with of was on the onset and and treatment using the overall Scale. Results: of for group was compared to group However, was no significant in between the groups (p There was no significant in the onset of in groups (p however a that patients for onset compared to group 24 were observed in The test results that is no statistically significant (p in treatment for Conclusion: of the patients have treatment of protocols. The study no significant in the of between and that may be to more relevant Keywords:

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