Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “CUSPID”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 469 records · Page 26Linked to original sources
PubMed1985

Clinical observations regarding the treatment of traumatically avulsed mature teeth. Part 2.

Two documented cases involving avulsions of an incisor and a cuspid are reported. Long-term observations following replantations indicated factors in addition to those reported in Part 1 of this study. Endodontic metallic implants may retard the intrusive process. A fixed-bridge splint also appears to have retarded the ankylosis phenomenon. The three case reports in the two parts of this study indicated that splint time may not be a critical factor in the prognosis of replanted teeth. Calcium hydroxide failed to prevent early root resorption and eventual ankylosis in an early replantation case; the other two cases, with longer replant time, fared better without calcium hydroxide. Endodontic treatment of avulsed teeth soon after replantation is suggested; a time period of several weeks does not appear critical to the prognosis. Removal of the apical root segment prior to replantation does not appear to affect the replacement root resorption process. The reporting of long-term documented cases should be encouraged in order that replantation techniques may be evaluated.

Adult↗
PubMed1995

An alternative treatment for the severely resorped maxillary lateral incisor: a sequela of ectopic eruption.

At times dental crowding, maxillary arch inadequacy, or an abnormal lingual or horizontal position restricts the eruption of the maxillary cuspid. This ectopic eruption can cause the canine to compress the blood supply to the periodontal tissues of the adjacent lateral incisor. If undiagnosed and untreated, physiological and chemical changes are induced, and the lateral root undergoes resorption. When the resorption is severe enough to endanger the retention of the lateral, an endeosseous stabilizer can be placed through the root and extended into the bone to stabilize the tooth artificially. Two cases demonstrate the technique and success of such treatment.

Adolescent↗
PubMed1998

Regional bond strengths of self-etching/self-priming adhesive systems.

The purpose of this study was to measure the regional tensile bond strengths (TBS) at various portions of human tooth enamel and dentin, and to observe the resin-dentin interfaces of two commercially available self-etching/self-priming adhesive systems by scanning electron microscopy (SEM). Twelve extracted human cuspid teeth were used to measure TBS and four additional teeth were used for scanning electron microscopy (SEM). Outer enamel and dentin were removed from the labial tooth surfaces to form a long cavity preparation into middle dentin extending from the mid-crown to the apex of the root within the same tooth. Either Clearfil Liner Bond 2 (LB 2, Kuraray) or Fluoro Bond (FB, Shofu) was bonded to the surfaces, and covered with resin-composite. The resin-bonded teeth were serially sliced at right angles to the long axis of the tooth, and the bonded surfaces were trimmed to give a bonded cross-sectional surface area of 1 mm2 for TBS tests. LB 2 and FB showed significantly higher TBS in coronal, cervical and middle root dentin than that in enamel and apical root dentin. SEM showed that the thickness of the hybrid layer of both systems was about 1.0 microm in coronal, cervical and middle root dentin, and less than 0.5 microm in apical root dentin. These results suggested that the self-etching/self-priming systems produce good adhesion in coronal, cervical and middle root dentin by creating thin hybrid and transitional layers, but bonding to enamel and apical root dentin should be improved.

Acid Etching, Dental↗
PubMed1994

Adult treatment with removal of all four permanent canines.

The permanent canines-especially in the maxillary arch-have always been considered of prime importance, even before the "cuspid protection" hypothesis became well known to most orthodontists in the 1960s. In the adult case presented, periodontal considerations and other factors led to the unconventional (and likely controversial) extraction of all four canines.

Adult↗
PubMed1998

Eruption of the permanent upper canine: a radiologic study.

The early detection of eruptive anomalies of the upper canine requires an understanding of its normal eruptive pattern. We studied this pattern in terms of upper canine inclination and its relation to the lateral incisor, on the basis of the panoramic radiographic records of 305 children aged 4 to 12 years. The study sample comprised 554 maxillary canines in the oral pre-emergence phase of eruption. Subject age, sex, inclination of the canine (CI), its relation to the lateral incisor (RCLI), and development of the lateral incisor (DLI) were evaluated. The results show that the canine erupts, increasing its inclination mesially until a maximum is reached, at about 9 years of age, after which the tooth begins to progressively upright itself. The individual variability of the degree of CI at a given age is considerable. In the initial stages, the RCLI is most commonly characterized by overlapping, a situation rarely seen in the final stages. The DLI effectively discriminates both periods, because when DLI is incomplete, more than half of the cases have an overlapping RCLI. In contrast, when the DLI is complete, this overlapping is seen in only 7% to 11% of the cases. This variable therefore increases the capacity to detect a possible eruptive anomaly at an early stage. In patients with complete DLI and overlapping RCLI, particularly when associated with other clinical signs such as the nonpalpation of the cuspid bulge in the alveolar process, the presence of dental agenesis, ankylosis, malformations, or ectopic eruptions, extraction of the primary canine is advised to prevent impaction.

Analysis of Variance↗
PubMed1997

Ekman-Westborg-Julin syndrome. A case report.

A rare case of the Ekman-Westborg-Julin syndrome in a 15-year-old boy is presented. The patient had general macrodontia with gigantic mandibular third molars. Other dental anomalies, such as peak-shaped cuspids, central cusps, dens in dente, multituberculism, and single conical molar roots, were also present.

Adolescent↗
PubMed1998

Pulpal thermal responses to an erbium,chromium: YSGG pulsed laser hydrokinetic system.

PROBLEM: Laser systems are known to raise pulpal temperatures when applied to tooth surfaces. Dental biocalcified tissues can be cut with an erbium,chromium:yttrium-scandium-gallium-garnet laser-powered hydrokinetic system. This device is effective for caries removal and cavity preparation in vitro. Pulpal monitoring of temperature changes during hard tissue cutting by a hydrokinetic system have not been reported. OBJECTIVES: This study compared the effects of hydrokinetic system, dry bur, and wet bur tooth cutting on pulpal temperature. STUDY DESIGN: In vivo thermocouple intrapulpal measurements were made on cuspid teeth in anesthetized beagle dogs. In vitro measurements were made on extracted human molar teeth preserved in high-salt solution and later rinsed in phosphate-buffered saline (pH 7.4) to simulate in vivo conditions. The hydrokinetic system was compared with conventional air-turbine-powered bur cutting. The hydrokinetic system cuts and bur preparations were randomly made on the buccal surfaces at the cervical one third of the crown and extended until exposure of the pulp was confirmed clinically. RESULTS: Pulpal temperatures associated with the hydrokinetic system either showed no change or decreased by up to 2 degrees C. Wet bur preparations resulted in a 3 degrees to 4 degrees C rise. With dry bur preparations, a 14 degrees C rise in temperature was recorded. CONCLUSIONS: Under the conditions of this study, the erbium,chromium:yttrium-scandium-gallium-garnet laser-powered hydrokinetic system, when used for cavity preparation, had no apparent adverse thermal effect as measured in the pulp space.

Aluminum Silicates↗
PubMed2001

Pain and instability during biting with mandibular implant-retained overdentures.

We tested in a randomized controlled clinical trial the effect of pain and instability of dentures on bite force with different degrees of mucosal support. The trial involved 3 groups who had received: 1) a new conventional denture (CD-group), 2) an implant-mucosa-borne overdenture on 2 IMZ implants (IMZ-group) or 3) a mainly implant-borne overdenture retained by a transmandibular implant (TMI-group). Fifty-three women and 15 men, mean age 59 years, participated in this study. Bite force measurements were made unilaterally with a transducer and bilaterally with a bite fork. After the measurements, subjects were asked whether or not biting had caused pain or tilting of one of the dentures. Significantly more complete-denture wearers reported pain. They reported more frequent pain in the mandible than in the maxilla (P < 0.001), whereas implant-groups seemed to experience more often pain in the maxilla. On the transducer, maxillary dentures of the CD-group tilted less (P < 0.01) and mandibular dentures more (P < 0.05) compared to the implant-groups. With the bite fork, tilting occurred more often in the incisal-cuspid area than in the molar region (P < 0.001). No effect of pain and tilting was observed on maximum bite force. It appears that oral implants used to stabilize mandibular dentures permit subjects to exert higher bite forces and reduce the pain as otherwise felt in the mandible during maximum biting. Due to this stabilization, pain and instability of the maxillary denture can become the limiting factor for a further increase in bite force.

Adult↗
PubMed1978

The mandibular dental arch: part III. Buccal expansion.

The tendency toward relapse in intercuspid width has been examined with those cases having final intercuspid width less than 27 mm showing significantly less relapse than those cases with final intercuspid width of 28 mm or more. The point of contact between the cuspid and first premolar has been introduced as a key point on the arch, determining arch width. An individualized norm has been derived for this measurement as a function of the patient's tooth size, facial pattern, and other variables based upon stable normal occlusions in treated cases. Those cases expanded to a dimension exceeding the norm by more than 1 mm showed a greater propensity toward relapse. The group following the norm was significantly more stable than the over- and underexpansion groups at the .025 significance level. An individual norm for intermolar width based upon the patient's facial pattern (using frontal and lateral X-rays) has been established. Cases showing relapse showed considerably less space between the lower molar and the JAG plane, and greater lower face height than stable cases. The results show that the space available for the permanent dentition can be estimated in advance of treatment based on the patient's own skeletal measurements, thus minimizing unnecessary extractions, relapse, and extended treatment time due to errors in diagnosis.

Adolescent↗
PubMed2003

Bilateral maxillary dentigerous cysts: a case report.

Dentigerous cysts are benign odontogenic cysts that are associated with the crowns of permanent teeth. They are usually single in occurrence and located in the mandible. Multiple cysts are reported in patients with conditions such as mucopolysaccharidosis and basal cell nevus syndrome. We present the radiologic findings of bilateral impacted maxillary cuspids with dentigerous cysts displacing the maxillary sinuses in a nonsyndromic patient, a condition that, to our knowledge, has not been previously reported.

Child↗
PubMedDate not supplied

Resorption of the lateral maxillary incisor: assessment by CT.

Computed tomography of the maxillary alveolar arch was performed in three children with delayed eruption of one or both maxillary cuspids. Computed tomography demonstrated close contact between the ectopically localized and nonerupted canine and the lateral incisor. The lesion was unilateral in two patients and bilateral in one. In two patients resorption of the lateral incisor root was demonstrated. Moreover, CT permitted exact determination of the extent of the lesion by differentiating between superficial cementodentine resorption limited to the cementodentine (superficial resorption) and resorption extending into the pulpal canal (pulpal canal involvement).

Adolescent↗
PubMed2002

Comparison of two ultrasonic instruments for post removal.

The relative performance of two different ultrasonic units commonly used clinically for post removal was evaluated using tips designed specifically for post vibration. Twenty-four extracted maxillary and mandibular cuspids with crowns removed at the labial cementoenamel junction were treated endodontically. Post spaces were made 10 mm into the roots before cementing a 16 mm #5 (0.050-inch) Para-Post with zinc phosphate cement. The teeth were divided into three similar groups of eight. Post retention was assessed in group 1. Ultrasonic vibration was applied to groups 2 and 3 until post removal. The average force required to dislodge the posts from the teeth in group 1 (control group, no ultrasound) was 40.5 kg (SD = 12.3 kg). The average time for post removal in group 2 (Spartan) was 4:52 min (SD = 2:26). The average time for post removal in group 3 (Enac) was 1:31 min (SD = 0:34). The difference between groups 2 and 3 was statistically significant (p < 0.005). Use of ultrasonic tips designed for post vibration and maximization of audible sound level during ultrasonic treatment of posts seem to play an important role in the effectiveness and efficiency of post removal. The results obtained indicate that both the Enac ultrasonic unit with the ST-09 vibration tip and the Spartan ultrasonic unit with the Analytic VT-S tip were effective. Nevertheless, the Enac ultrasonic unit with the ST-09 vibration tip was clearly more efficient under these study conditions, resulting in typical post removal times of <2 min.

Cementation↗
PubMed1997

Implant pathology associated with loss of periapical seal of adjacent tooth: clinical report.

A mandibular cuspid adjacent to two implants placed in the incisor region redeveloped periapical pathosis as a result of the inadvertent removal of the gutta-percha seal during post preparation. The root end inflammatory process communicated with the surface of an adjacent implant, resulting in endodontic-implant pathosis and subsequent removal of the implant. The osteotomy site healed uneventfully and almost complete osseous repair was observed after five months.

Cuspid↗
PubMed2005

The influence of preparation size on the mechanical efficacy of root canal irrigation in vitro.

This study tested the hypothesis that the mechanical efficacy of irrigation in reducing intracanal bacteria is dependent on canal preparation size. Root canals of 30 extracted permanent cuspids were prepared consecutively to sizes 36, 60, and 77 at working length (WL) using ProFile 0.04 taper Series-29 files. Smear layer was removed and teeth autoclaved following completion of each instrumentation sequence. Root canals were inoculated with a 15-mul suspension (1x10 cells) of Pseudomonas fluorescens 5RL, a salicylate-inducible bioluminescent reporter strain. Bioluminescence was measured before inoculation (background), after inoculation and after irrigation with 6 ml of irrigant delivered 1 mm from WL using a 28G safety-ended needle. The percentage of bacteria remaining following irrigation was 26.95+/-9.71%, 10.46+/-5.87%, and 10.64+/-6.01% for sizes 36, 60, and 77, respectively (p<0.001; repeated-measures ANOVA), with no difference between sizes 60 and 77 (p>0.05; Tukeys). Irrigation 1 mm from WL was significantly less effective in canals prepared to size 36.

Analysis of Variance↗
PubMed2005

Influence of irrigant needle depth in removing bioluminescent bacteria inoculated into instrumented root canals using real-time imaging in vitro.

AIM: To test the hypothesis that the mechanical efficacy of irrigation in reducing bacteria in the root canal is dependent on depth of placement of the irrigation needle. METHODOLOGY: The root canals of 30 permanent cuspids were instrumented to apical size 60 using a crown-down technique. A suspension of the bioluminescent reporter strain Pseudomonas fluorescens 5RL was inoculated into each canal of sterilized teeth. Emission of bioluminescence (photons s(-1)) from each tooth was quantified on four sequential occasions using luminometry and bioluminescence imaging: (i) background, (ii) after inoculation, (iii) after irrigating the inoculated teeth with 3 mL of a nonantimicrobial irrigant delivered either 1 mm (group 1, n = 15) or 5 mm (group 2, n = 15) from working length (WL) using a 28G safety-ended irrigating needle, (iv) after an additional 3 mL irrigation (total 6 mL). Intragroup and intergroup comparisons were made using Wilcoxon matched pairs and Mann-Whitney tests, respectively. RESULTS: In group 1, there was a mean log10 decrease in bacteria of 0.68 +/- 0.26 after 3 mL of irrigant compared with 1.19 +/- 0.48 after 6 mL (P < 0.001); in group 2 the mean log10 decrease was 0.58 +/- 0.28 after 3 mL of irrigant compared with 0.69 +/- 0.35 after 6 mL (P < 0.02) (Wilcoxon matched pairs). Using 3 mL of irrigant, needle depth did not have a significant effect on reduction of intracanal bacteria (P = 0.407), but the effect became significant when 6 mL of irrigant was used (P < 0.002) (Mann-Whitney tests). CONCLUSIONS: The mechanical efficacy of 6 mL of irrigant in reducing intracanal bacteria was significantly greater when delivered 1 mm compared with 5 mm from WL.

Colony Count, Microbial↗
PubMed1994

Front tooth replacement with Tübingen (Frialit) implants.

127 Tübingen (Frialit) implants have been clinically evaluated for a 10 year period. The implants were placed in the anterior region of the maxillae of 101 patients to replace lost incisors, cuspids and premolars. Seventy-seven implants were placed within 3 months after loss of a natural anterior tooth, resulting in the preservation of the volume of the alveolar ridge and the contour of the surrounding soft tissues. This preservation of the volume of the alveolar ridge was due to the fact that the Tübingen implants have conical shapes and sizes, equal to those of the roots of natural teeth. The dentine-like colour and the biological properties of the bio-inert Al2O3 implant-material, in most of the cases was an advantage to the aesthetics of the prosthetic restorations and to the condition of the soft tissues in the permucosal area. The Tübingen implant is placed with a one-phase technique implying special care for the temporary restorations to avoid premature loading. Also prevention of overloading the ceramic material by the fixed restoration needs special attention in the construction of posts, cores and crowns. The overall survival-rate in this study with a mean follow-up of 4.5 years was 87%. Patient and dentist satisfaction was high.

Adolescent↗
PubMed1984

Reproducibility of probing attachment level measurements.

The reproducibility of probing attachment level measurements in incisors, cuspids and premolars was studied in 2 groups of patients with severely advanced periodontal disease. The results showed that approximately 90% of the recordings could be reproduced within within +/- 1.0 mm difference. This was found for intra-examiner as well as inter-examiner comparisons of 2 examiners. Measurements using onlay margins for reference point demonstrated somewhat less variability than the use of cemento-enamel junction for reference. The level of reproducibility varied notably between patients and was improved following non-surgical periodontal therapy. Also, the reproducibility varied significantly between tooth types, tooth surfaces and probing pocket depths. It was concluded that in clinical studies, the evaluation of the healing response of individual lesions should include consideration of the variability of repeated measurements for each of the investigated tooth sites.

Bicuspid↗
PubMed1985

Effect of non-surgical periodontal therapy. VI. Localization of sites with probing attachment loss.

Incisors, cuspids and premolars in 49 patients with advanced chronic periodontitis were treated with initial, non-surgical periodontal therapy. The results were monitored by probing attachment level measurements at 6 sites of each tooth every 3rd month during a period of 24 months. A series of 9 probing attachment level measurements for each site was subjected to linear regression analysis. The slope of the regression line, the projected probing attachment loss during the 24-month interval (delta y) and the probability level of the slope were calculated for each site. 2 groups of sites with probing attachment loss were identified: group 1: sites with delta y greater than 1.5 mm and p less than 0.05; group 2: sites with delta y greater than 1.0 mm and p less than 0.05. Group 1 included 120 sites (5%) and group 2 included 265 sites (10%) of the total of 2532 available sites. In both groups, probing attachment loss was more frequently noticed for sites with an initial probing depth less than or equal to 3.5 mm than for sites with initial probing depth greater than or equal to 7.0 mm. The finding that the majority of sites with probing, attachment loss was found amongst initially shallow or moderately deep lesions may indicate attachment loss due to trauma associated with therapy rather than loss as a result of a continuing, inflammatory disease process.

Adult↗