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PubMed1999

The influence of a simplified application technique for ceramic inlays on the margin quality.

UNLABELLED: The adhesive luting technique for ceramic inlays requires a sequence of multiple steps that are cumber-some and time consuming. Furthermore, modifications of dentin bonding procedures may negatively influence the margin quality of ceramic inlays with cervical dentin finishing lines. PURPOSE: The objective of this study was to test the effect of a new, simplified procedure for dentin bonding on the margin quality of ceramic inlays. MATERIALS AND METHODS: Thirty-two MOD inlay cavities with cervical finishing lines in dentin were prepared into premolars. They were randomly divided into four groups (n = 8): In the balanced design, one parameter was the inlay material (Empress/Cerec) and the other the polymerization of the dentin bonding agent, before insertion of the inlay (P+) and after insertion of the inlay (P-). All inlays were inserted with Variolink II in combination with an enamel and dentin conditioning universal bonding agent (Etch & Prime 3.0). Two parameters were used to determine the inlay quality: (1) the fit, measured by the difference of the insertion depth into the cavity between try-in and cementation, and (2) a quantitative margin analysis in the SEM at a magnification of 200x, performed for the cervical segment before and after thermocycling, using epoxy replicas. RESULTS: In all four groups the inlays were > 5 microns deeper in the cavities than at the try-in session. This is explained by the substance loss from the etching. The measured difference for Cerec inlays inserted in cavities, where the bonding agent was not polymerized prior to insertion, was significantly larger. Margin analysis of the cervical segment revealed no statistical differences (P < 0.01) for both criteria tested. The median values for all groups were 100% for clinical acceptable margin and 0% for marginal opening. CONCLUSION: By using the universal bonding agent, high margin qualities on dentin and enamel are obtained with ceramic inlays even with the simplified approach.

Analysis of Variance↗

PubMed1990

[Adaptability of composite resin inlays. 1. Adaptability to the experimental MOD cavity prepared in an acrylic block].

The adaptability of composite resin inlays was examined. CR Inlay and INLAY/ONLAY were used as materials. After the CR Inlay was polymerized in a U-form metal mold, the dimensional changes were measured before and after heating. Furthermore, the composite resin inlays made according to the manufacturer's instructions were cemented in an MOD type cavity and the film thickness of the cement was measured. The polymerization shrinkage of CR Inlay was 0.63% in the inside of the inlay and after heating it increased to 0.71%. The film thickness of the cement in the case of CR Inlay was more than 250 microns and that in the case of the INLAY/ONLAY was more than 750 microns in the MOD type cavity. Dentacolor XS (a box type photo generator) was better than Wite Lite (a handy type photo generator) for the polymerization of CR Inlay. Because of the poor adaptation of the inlays and the difficulty in removing a inlay from a stone model for CR Inlay, perhaps polymerization shrinkage of the inlay should be compensated in some way.

Cementation↗

PubMed2003

Composite resin fillings and inlays. An 11-year evaluation.

The purpose of this randomized, clinical study was to evaluate the clinical performance of composite resin materials used for fillings and indirect inlays. Twenty-eight sets of five class II restorations (two fillings, three inlays) were placed in 88 premolars and 52 molars in 28 adults. Brilliant Dentin and Estilux Posterior were used for both fillings and inlays, and SR-Isosit for inlays only. After 11 years, 27 sets of restorations (96%) were evaluated clinically using modified United States Public Health Service criteria. Replaced or repaired restorations were observed in 16% of the fillings and 17% of the inlays, and a further 5% of the restorations were replaced for reasons not related to the restoration. The remaining 107 restorations exhibited optimal ratings in 30% of the fillings and 12% of the inlays (P<0.05) and acceptable ratings in 70% and 88%, respectively. The reasons for failure were fracture of restoration (four fillings, five inlays), secondary caries (two fillings, four inlays), fracture of tooth (two inlays), loss of proximal contact (two fillings), and loss of restoration (one inlay). Failures were seen more frequently in molar than premolar restorations (P<0.05), with no significant difference between fillings and inlays or between the five types of restoration (P>0.05).

Acrylic Resins↗

PubMed1995

A clinical evaluation of porcelain inlays.

Sparse data are available concerning the survival rate of porcelain inlays or onlays to inform the dentist and address the expectations of patients. A total of 25 posterior porcelain inlays were inserted by two dentists at a private Danish clinic; the time elapsed since cementation was 20 to 57 months (average 40.4 months). Tooth preparations for MOD porcelain inlays were completed for 13 premolars and 12 molars but most did not include cuspal coverage. All inlays were constructed at the same commercial dental laboratory and according to the manufacturer's recommendations; they were etched and treated with silane before they were cemented. The cementation included etching of cavosurface enamel and treatment of the dentin with a dentinal bonding system. A thin layer of composite resin luting agent was applied to the tooth preparation before the porcelain inlays were cemented. The first 10 porcelain inlays were cemented with a light-curing composite resin cement and the remaining 11 with a dual-curing composite resin cement. Twelve of the 25 porcelain inlays failed and were replaced during the observation period. Ten failures were due to a fracture of the inlay, one was caused by secondary caries, and the final failure was attributed to a marginal gap between the inlay and proximal tooth surface. Porcelain inlays cemented with light-curing composite resin exhibited more failures (p = 0.05) than those cemented with dual-curing composite resin. In addition, more failures (p = 0.07) were recorded among inlays inserted in molars than among those in premolars.

Acid Etching, Dental↗

PubMed1998

One-year clinical evaluation of composite and ceramic inlays in posterior teeth.

STATEMENT OF PROBLEM: There are only a few studies available that deal with the clinical behavior of composite and ceramic inlay systems as potential substitutes for amalgam restorations. PURPOSE: This prospective clinical trial evaluated composite and ceramic inlay systems for clinical acceptability as restorative materials in single or multisurface cavities of posterior teeth and provided 1-year results. MATERIAL AND METHODS: Forty-seven composite inlays (Tetric, Blend-a-lux, Pertac) and 24 heat-pressed ceramic inlays (IPS Empress) were placed in 45 patients by 7 student operators under the supervision of an experienced dentist. The first clinical evaluation was performed 11 to 13 months after placement of the restorations and used modified United States Public Health Services criteria. RESULTS: Satisfactory results over this period were found, as 100% of ceramic inlays and 94% of composite inlays were assessed to be clinically excellent and acceptable. Only 3 composite inlay restorations were scored delta (unacceptable). Two inlays exhibited secondary caries and 1 demonstrated loss of pulp vitality. For the criteria "anatomic form of the surface" and "marginal integrity," ceramic inlays were significantly better than composite inlays. CONCLUSION: Posterior tooth-colored inlays provided acceptable and excellent clinical service, even if they are placed by relatively inexperienced student operators.

Adult↗

PubMed2005

The marginal quality of luted ceramic inserts in bovine teeth and ceramic inlays in extracted molars after occlusal loading.

PURPOSE: To compare the marginal adaptation of adhesively luted ceramic inserts in standardized cylindrical cavities of bovine dentin and enamel with the marginal adaptation of adhesively luted ceramic inlays in extracted molars after mechanical loading, and to calculate the minimum sample size required to differentiate between material groups based on the findings of this investigation. MATERIALS AND METHODS: Ceramic inserts of similar dimension were luted in standardized cylindrical cavities of bovine dentin and enamel (n = 6, O = 4 mm) with seven different adhesive/resin cement systems (Syntac/Variolink, Prime & Bond NT/Variolink, Excite DSC/Variolink, AdheSE/Variolink, Excite DSC/Multilink, Multilink Primer/ Multilink, RelyX Unicem). The same materials were used to lute ceramic inlays (Empress II) in three-surface cavities of extracted human molars (n = 6 per group). All specimens were submitted to 2000 cycles of thermocycling. In addition, restored teeth were submitted to cyclic loading (640,000 cycles, 50 N) in a chewing simulator. Replicas after stressing were analyzed with SEM, and the percentage of continuous margin of the inserts and the inlays was calculated, differentiating the proximal part of the inlay into cervical dentin/enamel and axio-proximal enamel. The mean percentage values per material group of the insert and inlay groups were ranked using relative ranks. Sample size estimation was done for pooled standard deviations comparing between two and seven materials and assuming 20% or 10% of the mean of continuous margin to be statistically significant. RESULTS: The Spearman correlation coefficient between the variables "insert dentin" and "inlay cervical dentin" was 0.71 (p = 0.07), between "insert enamel" and "inlay axio-proximal enamel" 0.07 (p = 0.9). The variability of the test results was large for both the insert and inlay variables, especially at the resin-dentin interface. No statistically significant difference between the materials could be found for the insert method when ANOVA and Bonferroni post-hoc tests were applied (p > 0.05), while the inlays luted with Prime & Bond NT/Variolink showed significantly less continuous margin at the cervical dentin than all other groups with the exception of RelyX Unicem. At least 16 (63) inlays and 14 (57) inserts had to be used per group for differences of 20% (10%) of the mean of continuous margin. CONCLUSION: To evaluate luting agents with regard to their ability to reduce marginal discrepancies, the inlay model is inadequate due to high sample numbers which make the test time-consuming and expensive; furthermore its clinical relevance is uncertain. Alternatively, the insert method may be a suitable screening method for dentinal margins, although its clinical relevance is also unknown.

Analysis of Variance↗

PubMed2006

Comparison of tibial inlay versus transtibial techniques for isolated posterior cruciate ligament reconstruction: minimum 2-year follow-up.

PURPOSE: Surgical treatment of isolated posterior cruciate ligament (PCL) injuries is controversial. The purpose of this retrospective study was to evaluate the surgical outcomes of PCL reconstruction. Two techniques were compared, the traditional endoscopic and the more recent tibial inlay, to determine if the inlay technique yielded more stable reconstructions. TYPE OF STUDY: Retrospective study of surgical outcomes. METHODS: Between 1980 and 1997 [corrected], 29 patients underwent surgery for isolated PCL injuries at our institution. Two patients underwent primary repair, 4 underwent primary repair with semitendinosus-gracilis augmentation, and 1 had a tibial inlay with a double femoral tunnel, and these patients were excluded from this study. Two patients were lost to follow-up, leaving 20 patients who were evaluated at a mean follow-up of 5.7 years (range, 2 to 15 years). The average age at surgery was 29 years (range, 17 to 49 years). The primary indication for surgery was instability (95%). The surgical procedures included 13 traditional endoscopic transtibial PCL reconstructions (9 bone-patellar tendon-bone [BPTB] autograft, 2 BPTB allograft, and 2 allograft Achilles tendon) and 7 tibial inlay (all BPTB, 5 allograft and 2 autograft). Each patient was evaluated using the Tegner, Lysholm, and American Academy of Orthopaedic Surgeons (AAOS) knee-rating scales, physical examination, corrected KT-1000 arthrometry, functional testing, and radiographs. Statistical analysis was performed using the Fisher exact t test, Wilcoxon signed-ranks test, and Mann-Whitney test. RESULTS: Overall, 90% pf patients were satisfied with their surgery. The postoperative posterior drawer test result improved in 4 of 7 (57%) in the inlay group, and in 5 of 13 (38%) in the endoscopic group. The mean corrected KT-1000 measurement was 5.7 mm overall, 5.5 mm (inlay) and 5.9 mm (endoscopic). The mean preoperative Tegner score was 6.86 (inlay) and 6.92 (endoscopic). The mean postoperative Tegner score was 6.00 for both groups. The mean Lysholm score was 76 (inlay) and 82 (endoscopic), and the AAOS knee score was 77 (inlay) and 90 (endoscopic). There was a trend toward increased radiographic progression of Fairbanks changes in the medial and patellofemoral compartments in the endoscopic group, but the numbers did not reach statistical significance (P = .057). CONCLUSIONS: When comparing the traditional endoscopic reconstructions with the tibial inlay technique, there were no significant differences in posterior drawer testing, KT-1000, functional testing, or Lysholm, Tegner, and AAOS knee scores at a minimum 2 year follow-up. CLINICAL RELEVANCE: The results of this study indicate that neither method (transtibial or inlay) of PCL reconstruction consistently restores anteroposterior stability to its original state when using a single-bundle femoral attachment site.

Accidents, Traffic↗

PubMed1997

Longevity of glass ceramic inlays and amalgam--results up to 6 years.

Ceramic inlays are discussed as one option for the substitution of amalgam restorations. The purpose of this study was to determine the longevity of glass ceramic inlays and amalgam restorations placed by the author: 123 class I and class II Dicor inlays placed with adhesive techniques and 163 amalgam class I and class II restorations were investigated. The observation time for the inlays varied from 4 to 82 months. The inlays were clinically investigated using modified USPHS criteria and documented photographically. Kaplan-Meier statistics were used to calculate the survival rate. From the 123 evaluated inlays 12 inlays (9.7%) failed: 7 due to fractures, 4 because of endodontic problems and 1 inlay was replaced due to persisting postoperative pain. All fractures could be explained by case selection errors. According to the Kaplan-Meier method, the estimated success rate after 6 years was 76% for the Dicor inlays and 87% for the amalgam restorations (control group). The difference was not statistically significant. It was concluded that Dicor inlays may be used as a successful alternative to amalgam.

Bicuspid↗

PubMed1992

Marginal adaptation of four tooth-coloured inlay systems in vivo.

This study investigates the margin quality of four different tooth-coloured inlay systems using computer-aided quantitative margin analysis under scanning electron microscopy. Three types of restorations involved chairside procedures using a commercial CAD-CAM apparatus: one type of inlay restoration was milled from preformed glass ceramic blocks, the other two inlay types were milled from preformed porcelain blocks. The fourth system was based on an experimental indirect composite inlay system. Each inlay type was luted with its respective dual-curing luting composite, which was supplied with the system. After 6 months of clinical service, all four systems revealed a significant percentage of submargination indicating occlusal wear of the luting composite. The porcelain inlays and the composite inlays luted with their respective experimental luting composite showed the best marginal adaptation. Luted glass ceramic inlays, in particular, suffered from a significantly higher percentage of inlay margin fractures (9 per cent) and marginal openings (4 per cent) than the other systems. A possible explanation is that the glass ceramic subsurface structure at the inlay-lute interface was weakened by etching with ammonium bifluoride.

Acid Etching, Dental↗

PubMed2003

Resin-modified glass ionomer cement and self-cured resin composite luted ceramic inlays. A 5-year clinical evaluation.

OBJECTIVE: This study evaluated IPS Empress ceramic inlays luted with two chemical-cured luting agents, a resin-modified glass ionomer cement (Fuji Plus (F)) and a resin composite (RC) (Panavia 21 (P)). METHODS: Seventy-nine ceramic inlays were placed in Class II cavities in 29 patients. At least two inlays were placed in each patient to compare the luting techniques intra-individually. In each patient half of the inlays were luted with F and the other half with P. The inlays were evaluated clinically, according to modified USPHS criteria (van Dijken, 1986), at baseline, after 6 months, and yearly during 5 years. RESULTS: At 5 years, 71 inlays were evaluated. Two small partial fractures were observed at 3 years (1P, 1F). One inlay showed recurrent root caries at 4 years (P). Four inlays, two in each group showed non-acceptable color match (2P, 2F). Small defects were observed in 4 inlays (2P, 2F). A slight ditching of the cement margins was observed in both luting groups but did not seem to increase during the second half of the evaluation. No significant difference in durability was observed between the two luting agents. SIGNIFICANCE: IPS Empress inlays luted with the chemical-cured RC and the resin-modified glass ionomer cement functioned satisfactory during the 5 years follow-up.

Adult↗

PubMed1994

Three-year comparison of fired ceramic inlays cemented with composite resin or glass ionomer cement.

Ceramic inlays offer a good alternative to posterior composites, which still show a high polymerization shrinkage. The thin cement layer will reduce the total amount of shrinkage and probably result in a better marginal adaptation and decreased marginal leakage. Fired feldspathic ceramic inlays cemented with either a glass ionomer cement or a dual-cured composite resin luting cement were compared intraindividually. During a 3-year period 118 inlays, 59 in each group, were examined. Eleven inlays were evaluated as non-acceptable during the period: two (3.4%) in the composite resin group and nine (15.3%) in the glass ionomer cement group. In the composite group one inlay fractured partially and one inlay was replaced because of postoperative sensitivity. In the glass ionomer group four inlays were totally lost, and partial fractures occurred in five inlays. In the fractured glass ionomer cemented inlays the cement was still in place in the cavities. Eight patients reported post-operative sensitivity. No secondary caries was detected around the inlays even though 46% of the patients were considered high caries risk patients.

Adult↗

PubMed2001

Three-year clinical evaluation of composite and ceramic inlays.

PURPOSE: To evaluate the 3-yr clinical performance of composite and ceramic inlays in posterior teeth. MATERIALS AND METHODS: 47 composite inlays (Tetric, Blend-a-Lux, Pertac) and 24 ceramic inlays (Empress) were placed by seven student operators under supervision of an experienced dentist. Clinical assessment of 58 inlays (81.7%) was performed after 3 yrs using amodified USPHS criteria and statistically analyzed with Mann-Whitney U test and Fisher's exact test. RESULTS: A total of 100% of the ceramic inlays and 89% of the composite inlays were assessed to be clinically excellent or acceptable. Three composite inlays failed during the first yr and one had to be replaced during the second evaluation period. All composite inlay failures were recorded on molars, revealing a significantly higher failure rate compared with premolars (Fisher's test, P = 0.041). Ceramic inlays revealed a significantly better "anatomic form of the surface" (P = 0.027) and "integrity of the restoration" (P = 0.035). Inlays in small cavities performed better for "marginal integrity" (P = 0.033) and "discoloration at the margin" (P = 0.038).

Adult↗

PubMedDate not supplied

A retrospective study of Mirage ceramic inlays over up to 9 years.

PURPOSE: The aim of this retrospective longitudinal study was to document the outcomes of resin-cemented ceramic inlays in patients treated in a private dental practice over up to 9 years. MATERIALS AND METHODS: Fifty-two patients received in all 109 Mirage ceramic inlays, 59 in molars and 50 in premolars. Follow-up data were collected on 51 patients and 107 inlays. The mean time in situ was 6.3 years. Technical failures or dislodgments of the inlays were recorded, as well as clinical and radiographic signs of periodontal and periapical diseases or caries lesions. RESULTS: During the follow-up period, 17 inlays had to be removed, 14 because of major fractures and 3 in teeth requiring endodontic treatment. The fractures were confined to 8 of the 51 patients available for follow-up and were significantly more common in molars than in premolars. Replacement of inlays was significantly more frequent in men than in women. During the study period, 20 further minor clinical interventions (eg, recementation of intact inlays, repair of minor fractures or caries defects) had been undertaken on the surviving inlays. Thus, major and minor complications together necessitated a total of 37 clinical interventions. The survival rate, based on the remaining 90 inlays still in situ, was 84%. CONCLUSION: In this material, the outcome of ceramic inlay therapy was influenced by both major and minor complications (35%). Eight of the 51 patients accounted for all the major fractures, implying that patient selection is an important determinant of the clinical outcome.

Adult↗

PubMed1993

[Efficiency and margin quality in the computer-assisted molding and grinding of ceramic inlays].

The life of diamond-coated discs during CAD/CAM machining of ceramic inlays was evaluated using the standard hydro-drive (H) and an electric drive (E) as a part of the Cerec 3rd generation unit. E-drive discs (40 mm diameter, 0.5 mm thickness) with four experimental diamond coatings, i.e. different grain sizes, E126 (106-125 microns), E64 (53-63 microns), E46-3 (38-45 microns; triple coating), E46-1 (38-45 microns; single coating) were used. The standard H-drive disc (30 mm diameter, 0.3 mm thickness) and H126 (106-125 microns) coating were used as a control. The same standard mesio-occluso-distal molar inlay was machined from blocks (size 1-8) of Dicor MGC light glass-ceramic and of Vita MkII feldspathic fine porcelain as many times as possible with one disc in each group and the number of machined inlays per disc was counted. Additionally the edge roughness (Ra) of the machined inlays was measured using a Talysurf 50 instrument. The numbers of inlays machined with H126 were 21 porcelain/12 glass-ceramic inlays. The numbers of inlays machined from porcelain/glass-ceramic with the E-drive test discs were E126: 180/68; E64: 93/29; E46-3: 80/21 and E46-1 (current limited to 2.5 ampere): 44/19 inlays. The edge roughness of porcelain/glass-ceramic inlays machined with the E-drive discs was significantly lower than the roughness of inlays machined using the H-drive. E126: 16% (p < 0.05)/43% (p < 0.001); E64: 49%/66%; E46-1: 62%/73%; E46-3: 83%/87% (all differences p < 0.001).(ABSTRACT TRUNCATED AT 250 WORDS)

Ceramics↗

PubMed1989

Microleakage of indirect composite inlays.

The purpose of this in vitro study was to evaluate the microleakage of indirect composite inlays and to compare leakage of inlays with directly placed composite restorations. Standardized MOD preparations were cut in 50 extracted human molars. One gingival margin was placed in enamel above the CEJ, and the other was placed in dentin below the CEJ. Two groups of teeth were directly filled with composites (P-30 and Heliomolar) after being etched, and dentin bonding agents were applied. Two groups of teeth were restored with composite inlays that were fabricated on stone dies. The inlays were made and luted with the same two composites. The last group of teeth was restored with Heliomolar inlays luted with Dual cement. The specimens were thermocycled 300 times between 5 and 50 degrees C. Microleakage was evaluated by use of the silver-nitrate staining technique. The depth of leakage was measured microscopically after the teeth were sectioned. Both direct restorations and inlays showed substantial leakage at gingival-dentin margins; however, there was only superficial leakage at enamel margins. P-30 inlays and Heliomolar inlays cemented with Dual leaked less than direct restorations at the gingival-dentin margins. There was no difference in leakage of enamel margins of inlays and direct restorations, except that direct Heliomolar restorations leaked more than the others. There was no difference in leakage between Heliomolar restorations luted with light-cured or dual-cured cement.

Composite Resins↗

PubMed1994

Marginal breakdown of fired ceramic inlays cemented with glass polyalkenoate (ionomer) cement or resin composite.

The marginal breakdown of fired porcelain inlays in vivo, luted with either a dual-cured resin composite or a glass polyalkenoate(ionomer) cement, was evaluated by scanning electron microscopy. Immediately following polishing (baseline) and after 1 year, replica impressions were made of the occlusal and proximal margins of two inlays, one cemented with the resin composite and the other with the glass ionomer cement, in each of 12 patients. At baseline the best marginal adaptation was observed along the proximal margins of the composite luted inlays, while occlusally glass ionomer luted inlays showed better marginal qualities than the composite luted inlays. At 1 year the composite luted inlays showed significantly better marginal adaptation than the glass ionomer luted ones at all interfaces. The greatest breakdown was observed occlusally, especially in the glass ionomer luted inlays. Gap sizes varied proximally between 83 and 100 microns and occlusally between 107 and 143 microns. Severe ditching was observed occlusally in the glass ionomer luted inlays. The overall marginal quality was significantly better for the inlays luted with the resin composite both at baseline and after 1 year.

Analysis of Variance↗

PubMed1997

The effect of filler content and processing variables on dimensional accuracy of experimental composite inlay material.

STATEMENT OF PROBLEM: Dimensional accuracy of a composite inlay restoration is important to ensure an accurate fit and to minimize cementation stresses. PURPOSE OF STUDY: A method was developed to measure dimensional accuracy and stability of a composite inlay. MATERIAL AND METHODS: A standard Class II (MOD) inlay cavity stainless steel mold was made with six circular indentations placed on the occlusal floor of the cavity and four indentations on each gingival floor to act as datum points in the measurement of linear polymerization shrinkage. The inlay restorations were prepared from an inlay-onlay composite material of different filler contents (50%, 65%, and 79% by weight). For each filler content group, three curing methods were used: light curing only, light curing and heat curing at 100 degrees C for 5 minutes, and light curing and heat curing at 100 degrees C for 5 minutes and then storage in distilled water for 7 days. The accuracy of the MOD inlays was determined by measuring the shrinkage of the restoration on the occlusal floor areas and the gingival seats. RESULTS: The results demonstrated an inverse linear relationship between filler content and polymerization shrinkage. There was a tendency for the light-curing and heat-curing method to show an increase in polymerization shrinkage. An expansion was recorded between the mesial and distal boxes when the specimens were soaked in water for 7 days. CONCLUSIONS: This study suggested that the inlay mold limits the physical shrinkage that can occur between the mesial and distal axial walls of the inlay restoration because the inlay cannot shrink to a smaller dimension than the mold. Water sorption then causes hygroscopic expansion, which enlarges the distance between the mesial and distal walls.

Analysis of Variance↗

PubMed2000

An 8-year evaluation of sintered ceramic and glass ceramic inlays processed by the Cerec CAD/CAM system.

The purpose of this study was to evaluate Cerec CAD/CAM inlays processed of two industrially made machinable ceramics during an 8-yr follow-up period. Each of 16 patients received two similar ceramic inlays. Half the number of the inlays were made of a feldspathic (Vita Mark II) and the other of a glass ceramic (Dicor MGC) block. The inlays were luted with a dual resin composite and evaluated clinically using modified USPHS criteria at baseline, 8 months, 2, 3, 5, 6 and 8 yr, and indirectly using models. At baseline, 84% of the inlays were estimated as optimal and 16% as acceptable. Postoperative sensitivity was reported by one patient for 8 months. Of the 32 inlays evaluated during the 8 yr, 3 failed due to fracture of the material. No secondary caries was found adjacent to the inlays. No significant differences in the clinical performance were found between inlays made of the two ceramics. It can be concluded that the CAD/CAM inlays processed of the two ceramics functioned well during the 8-yr follow-up period.

Adult↗