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Srpski Arhiv Za Celokupno Lekarstvo 2004The objective of this paper was to show the historical perspective of the "long centric" occlusal concept and its importance in the modern dentistry, especially from the... (Review)
Review
The objective of this paper was to show the historical perspective of the "long centric" occlusal concept and its importance in the modern dentistry, especially from the gnathological aspect. The "long centric" concept represents therapeutic modality used in modern dentistry and occlusal adjustment in all patients showing differences in strong and weak closure of the lower jaw starting from the position of physiological rest. "Long centric" concept is applied only for anterior teeth and occlusal movements from rather than toward the center. Whenever the "long centric" parameters are not adequate, occlusal disturbance, resulting from the "wedge" effect during the initial closure of the lower jaw, is present. Different degrees of abrasion or hypermobility of the teeth are often the result of the above-mentioned occlusal disturbances and can potentially trigger bruxism and malfunction. Modus procedendi should be the regular approach of every dentist to any occlusion, because only the built-in "long centric" efficiently contributes to the occlusal stability of the anterior portion of the dentition. All occlusions should be routinely tested regarding their need for "long centric", especially when the extensive therapeutic interventions (conservative, prosthetics) of the occlusal complex are required.
Topics: Centric Relation; Dental Occlusion, Centric; Humans; Occlusal Adjustment
PubMed: 15938227
DOI: 10.2298/sarh0412441m -
Journal of the American Dental... Oct 2014Peri-implantitis generally is attributed to a bacterial challenge, with occlusion being a modifying factor. The author presents a case of peri-implant marginal bone loss...
BACKGROUND
Peri-implantitis generally is attributed to a bacterial challenge, with occlusion being a modifying factor. The author presents a case of peri-implant marginal bone loss that was treated successfully with only occlusal adjustment.
CASE DESCRIPTION
A 63-year-old female patient with a history of bruxism reported for a yearly periodontal examination 38 months after restoration of an implant in the tooth no. 30 position. A radiograph indicated that this implant had significant peri-implant bone loss. The evaluation showed very heavy occlusion on the implant restoration, and the author performed an occlusal adjustment. A radiograph obtained five months later showed significant repair of the lost alveolar bone.
CONCLUSIONS AND PRACTICAL IMPLICATIONS
Patients with dental implants require periodic examination and maintenance therapy to prevent peri-implantitis. The examination should include a periodontal, prosthetic, radiographic and occlusal evaluation.
Topics: Alveolar Process; Bite Force; Bone Regeneration; Bruxism; Female; Follow-Up Studies; Humans; Middle Aged; Occlusal Adjustment; Peri-Implantitis; Radiography
PubMed: 25270705
DOI: 10.14219/jada.2014.65 -
Annals of Anatomy = Anatomischer... Mar 2012Although oral implantology is among the most beneficial developments of modern dentistry, the widely spread opinion that the long-term outcome of implants is superior to... (Review)
Review
Although oral implantology is among the most beneficial developments of modern dentistry, the widely spread opinion that the long-term outcome of implants is superior to that of natural teeth has been refuted. To evade uncritical extractions, the morphofunctional properties of natural teeth and implant-supported restorations are compared from a proprioceptive and occlusal trauma perspective. The periodontal ligament of natural teeth provides the central nerve system with feedback for sensory perception and motor control. Conversely, the lack of such proprioception causes lower tactile sensitivity and less coordinated masticatory muscle activity in implant-borne restorations and makes them more prone to occlusal overload and possible subsequent failure. Moreover, occlusal anomalies may be conducive to parafunctional activity, craniomandibular disorder, tinnitus, and headache. Oral implantology, therefore, has to take appropriate account of occlusal conditions and the biomechanical and neuromuscular aspects of masticatory function.
Topics: Biomechanical Phenomena; Bite Force; Dental Implants; Dental Occlusion; Dental Prosthesis, Implant-Supported; Dental Stress Analysis; Feedback, Physiological; Humans; Mastication; Masticatory Muscles; Occlusal Adjustment; Periodontal Ligament; Prosthesis Failure; Tooth
PubMed: 22137145
DOI: 10.1016/j.aanat.2011.09.006 -
Journal of Periodontology Nov 1986The aim of the investigation was to clarify the effects of the resolving of inflammation on one hand and the removal of occlusal trauma on the other hand on the rate of... (Clinical Trial)
Clinical Trial Randomized Controlled Trial
The aim of the investigation was to clarify the effects of the resolving of inflammation on one hand and the removal of occlusal trauma on the other hand on the rate of sulcular fluid flow (SFF) from deep periodontal pockets. Forty-seven adult patients having at least one tooth with an inflamed greater than 5 mm periodontal pocket and elevated mobility associated with occlusal trauma were selected for the study. After oral hygiene instruction and supragingival scaling, the rate of sulcular fluid flow of the test teeth was recorded on Day 0. After the baseline recording, each patient was randomly assigned to either Group A or Group B. The test teeth of Group A were subjected to subgingival scaling and root planing under local anesthesia, and the test teeth of Group B were subjected to occlusal adjustment. On Day 14 sulcular fluid flow was recorded for both groups, after which Group A received occlusal adjustment and group B received scaling and root planing. On Day 28 the sulcular fluid flow recordings were repeated for both groups. The mean flow rates of both Group A and Group B decreased significantly (P less than 0.05) from Day 0 to Day 28. When the occlusal interference was eliminated 2 weeks after scaling and root planing (Group A), no additional decrease in sulcular fluid flow was observed. When the occlusal interference was eliminated before scaling and root planing (Group B), the reduction in sulcular fluid flow remained statistically insignificant through the first 2-week observation period.(ABSTRACT TRUNCATED AT 250 WORDS)
Topics: Adult; Aged; Dental Occlusion, Balanced; Dental Occlusion, Traumatic; Dental Prophylaxis; Dental Scaling; Female; Gingival Crevicular Fluid; Gingivitis; Humans; Male; Middle Aged; Periodontal Index; Periodontitis; Secretory Rate; Tooth Root
PubMed: 3550034
DOI: 10.1902/jop.1986.57.11.681 -
The Journal of Prosthetic Dentistry Sep 2015This article describes a method of fabricating a custom total occlusal convergence angle sticker with photo editing software and label stickers. The custom total...
This article describes a method of fabricating a custom total occlusal convergence angle sticker with photo editing software and label stickers. The custom total occlusal convergence angle sticker can help clinicians achieve an accurate degree of taper during axial wall reduction of tooth preparation.
Topics: Dental Prosthesis Design; Humans; Occlusal Adjustment; Prosthodontics; Software; Tooth Preparation
PubMed: 26013073
DOI: 10.1016/j.prosdent.2015.03.014 -
Journal of Sleep Research Aug 2023Masticatory muscle activity during sleep has been considered independent of variations in the structural characteristics of the dental occlusion. However, scientific... (Randomized Controlled Trial)
Randomized Controlled Trial
Masticatory muscle activity during sleep has been considered independent of variations in the structural characteristics of the dental occlusion. However, scientific evidence contradicting an occlusal causal role is missing. The purpose of this study was to test the null hypothesis that sleep bruxism (SB) is independent of the presence of occlusal interferences. A total of 17 healthy female subjects (mean [SD] age 24.9 [4.1] years) presenting with SB, and randomly divided into two groups, were evaluated after receiving either elimination of occlusal interferences (Test group) or elimination of sharp margins without change in occlusal contacts (Control group). Audio-video polysomnography (PSG) recordings were undertaken before and after treatment (mean [SD] duration 14.4 [3.8] months). Two subjects in each group (< 2 rhythmic masticatory muscle activity [RMMA]/h) were excluded for statistical analysis. During the total sleep time (TST), the Test group exhibited a higher reduction in frequency of episodes per hour than the Control group (p < 0.05). The reduction in duration of episodes was also higher in the Test group during the TST. The Test group presented an increase in sleep stage N3 (p < 0.05) at the final PSG when compared with the initial PSG, and a higher percentage of N3 (p < 0.05) at the final PSG when compared to the Control group. Elimination of occlusal interferences resulted in a significant reduction of masseter and temporal muscle activity during sleep in females presenting with SB. Based on these results, the null hypothesis is rejected. The hypothesis of occlusal interferences as a risk factor for SB is still patent.
Topics: Humans; Female; Young Adult; Adult; Sleep Bruxism; Occlusal Adjustment; Electromyography; Masticatory Muscles; Masseter Muscle
PubMed: 36918352
DOI: 10.1111/jsr.13879 -
Journal of Esthetic and Restorative... Dec 2023To evaluate the volumetric changes on occlusal surface of computer-aided design and computer-aided manufacturing (CAD-CAM) occlusal devices fabricated following a fully...
OBJECTIVE
To evaluate the volumetric changes on occlusal surface of computer-aided design and computer-aided manufacturing (CAD-CAM) occlusal devices fabricated following a fully digital workflow after occlusal adjustment, compared to those fabricated with an analog workflow.
MATERIALS AND METHODS
Eight participants were included in this clinical pilot study, receiving two different occlusal devices fabricated with two different workflows, fully analog and fully digital. Every occlusal device was scanned before and after the occlusal adjustments to compare the volumetric changes using a reverse engineering software program. Moreover, three independent evaluators assessed a semi-quantitative and qualitative comparison using visual analog scale and dichotomous evaluation. The Shapiro-Wilk test was performed to validate normal distribution assumption, and a dependent t-Student test for paired variables was used to determine statistically significant differences (p-value < 0.05).
RESULTS
The root mean square value was extracted from the 3-Dimensional (3D) analysis of the occlusal devices. The average values of the root mean square were higher for the analogic technique (0.23 ± 0.10 mm) than the digital technique (0.14 ± 0.07 mm) but the differences were not statistically significant (paired t-Student test; p = 0.106) between the two fabrication techniques. The semiquantitative visual analog scale values between the impression for the digital (5.08 ± 2.4 cm) and analog (3.80 ± 3.3 cm) technique were significant (p < 0.001), and statistically significant differences values were assessed for evaluator 3 compared to the other evaluators (p < 0.05). However, the three evaluators agreed on the qualitative dichotomous evaluation in 62% of the cases, and at least two evaluators agreed in 100% of the evaluations.
CONCLUSIONS
Occlusal devices fabricated following a fully digital workflow resulted in fewer occlusal adjustments, as they could be a valid alternative to those fabricated following an analog workflow.
CLINICAL SIGNIFICANCE
Fabricated occlusal devices following a fully digital workflow could have some advantages over analog workflow such reduce occlusal adjustments at delivery appointment, which can result in reduced chair time and therefore increased comfort for the patient and clinician.
Topics: Humans; Occlusal Splints; Pilot Projects; Occlusal Adjustment; Computer-Aided Design; Workflow; Dental Prosthesis Design
PubMed: 37395327
DOI: 10.1111/jerd.13080 -
The International Journal of... 2015The objective of this preliminary study was to determine if the occlusal contact surface registered with an articulating paper during fixed prosthodontic treatment was...
The objective of this preliminary study was to determine if the occlusal contact surface registered with an articulating paper during fixed prosthodontic treatment was contained within the area marked on a thicker articulating paper. This information would optimize any necessary occlusal adjustment of a prosthesis' veneering material. A convenience sample of 15 patients who were being treated with an implant-supported fixed singleunit dental prosthesis was selected. Occlusal registrations were obtained from each patient using 12-μm, 40-μm, 80-μm, and 200-μm articulating paper. Photographs of the occlusal registrations were obtained, and pixel measurements of the surfaces were taken and overlapped for comparison. The results showed that the thicker the articulating paper, the larger the occlusal contact area obtained. The differences were statistically significant. In all cases, the occlusal registrations obtained with the thinnest articulating paper were contained within the area marked on the thickest articulating paper. The results suggested that the use of thin articulating papers (12-μm or 40-μm) can avoid unnecessary grinding of veneering material or teeth during occlusal adjustment.
Topics: Humans; Occlusal Adjustment; Paper
PubMed: 26218017
DOI: 10.11607/ijp.4112 -
Scientific Reports Jul 2021The purpose of this systematic review was to analyze the influence of occlusal reduction on the postoperative pain levels after endodontic treatment (instrumentation and... (Meta-Analysis)
Meta-Analysis
The purpose of this systematic review was to analyze the influence of occlusal reduction on the postoperative pain levels after endodontic treatment (instrumentation and obturation of the root canal system). This review followed the PRISMA statement and was registered at PROSPERO (CRD42018107918). Two independent reviewers searched the Lilacs, Cochrane Library, PubMed (Medline), Web of Science, Scopus, Scielo, and ScienceDirect for articles published until April 2021. The research question was, "Does occlusal reduction decrease postoperative pain in endodontically treated teeth?". Only randomized clinical trials were included. The RevMan 5 program was used for meta-analysis, calculating the relative risk (RR) and 95% confidence interval (CI) of the dichotomous outcome (presence or absence of pain). The search strategies retrieved 4114 studies. Twelve studies were included for qualitative analysis and nine for quantitative analysis. The meta-analysis results did not reveal a significant difference in the reduction of postoperative pain levels for endodontic instrumentation at 6, 12, 24, 48 h and for endodontic obturation at 6 or 12 h after occlusal reduction. According to the GRADE tool, the analyzed outcome was classified as having a moderate level of certainty. It is concluded that occlusal reduction does not interfere with postoperative pain levels after endodontic treatment.
Topics: Humans; Occlusal Adjustment; Pain Management; Pain, Postoperative; Root Canal Obturation; Treatment Outcome
PubMed: 34234168
DOI: 10.1038/s41598-021-93119-6 -
Implant Dentistry Feb 2015Functional bite impression (FBI) has been described as a definitive impression made under occlusal force after functional generated path (FGP) recording. This study...
OBJECTIVE
Functional bite impression (FBI) has been described as a definitive impression made under occlusal force after functional generated path (FGP) recording. This study compared the accuracy of occlusal contact of implant-fixed prostheses using the FBI technique and the conventional impression technique.
METHODS
Twelve subjects, each missing a single premolar or molar, were selected for this study. The conditions of the occlusal contacts were identified by the modified transillumination method. The occlusal contact condition was determined by comparing the rate of change in the occlusal contact area of the implant-fixed prostheses and both adjacent teeth before and after occlusal adjustment.
RESULTS
The rate of change in the occlusal contact area using the FBI technique was 96%, and the rate using the conventional technique was 54%. The occlusal contact of implant prostheses using the FBI technique revealed better accuracy than that of the conventional technique.
CONCLUSIONS
Regarding the FBI technique, a precise and functional prosthesis could be produced by completing the maxillomandibular registration, impression, and FGP at the same time.
Topics: Aged; Bite Force; Dental Implantation; Dental Implants, Single-Tooth; Dental Impression Technique; Dental Occlusion; Female; Humans; Male; Middle Aged; Occlusal Adjustment
PubMed: 25379661
DOI: 10.1097/ID.0000000000000175