Effects of Intrusive Force on Selected Determinants of Pulp Vitality

Veberiene, Rita; Smailienė, Dalia; Danielytė, Jovita; Toleikis, Adolfas; Dagys, Arvydas; Mačhiulskienė, Vita

doi:10.2319/110408-563r.1

Cited by 27 publications

(28 citation statements)

References 27 publications

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“…Another reason that no clear effects on pulpal tissues have been found in the present study might be that our appliance induced an almost bodily movement of the molar block (Ren et al, 2004;Ren et al, 2003), while others used tipping movements of the first molar only (Abi-Ramia et al 2010;Bletsa et al 2006;Grunheid et al 2007;Santamaria et al 2007;Shigehara et al 2006;Tripuwabhrut et al 2010), intrusion (Barwick & Ramsay 1996;Ikawa et al 2001;Konno et al 2007;Raiden et al 1998;Ramazanzadeh et al 2009;Stenvik 1971;Veberiene et al 2009), or extrusion (Ramazanzadeh et al 2009;Stenvik 1971;Subay et al 2001).…”

Section: Discussioncontrasting

confidence: 55%

Peer Review #2 of "Age-related changes of dental pulp tissue after experimental tooth movement in rats (v0.1)"

2016

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It is generally accepted that the effect of orthodontic tooth movement on the dental pulp in adolescents is reversible and that it has no long-lasting effect on pulpal physiology. However, it is not clear yet if the same conclusion is also valid for adult subjects. Thus, in two groups of rats, aged 6 and 40 weeks respectively, 3 molars, at one side of the maxilla, were moved together in a mesial direction with a standardized orthodontic appliance delivering a force of 10 cN. The contralateral side served as a control. Parasagittal histological sections were prepared after tooth movement for 1, 2, 4, 8, and 12 weeks. The pulp tissue was characterized for the different groups, with special emphasis on cell density, inflammatory cells, vascularity, and odontoblasts. Dimensions of dentin and the pulpal horns was determined and related with the duration of orthodontic force application and age ware evaluated. We found that neither in young nor in adult rats, force application led to long-lasting or irreversible changes in pulpal tissues. Dimensional variables showed significant age-related changes. In conclusion, orthodontic tooth movement per se has no long-lasting or irreversible effect on pulpal tissues, neither in the young nor in the adult animals.

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Section: Discussioncontrasting

confidence: 55%

Peer Review #2 of "Age-related changes of dental pulp tissue after experimental tooth movement in rats (v0.1)"

2016

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“…It has been reported that orthodontic tooth movements like intrusion might also influence PST response [7, 40]. Radiographic examination, albeit limited to two-dimensional plain film radiographs, did not reveal any close proximity between the OMIs and the roots of the teeth.…”

Section: Discussionmentioning

confidence: 89%

“…It is known that orthodontic tooth movement can affect PST response temporarily [6], but sensibility is thought to return to normal after completion of treatment. The authors state that there is no agreement in the literature regarding potential long-term sequelae: reported pulpal responses after orthodontics included circulatory vascular stasis and necrosis [7]. Cases of pulpal necrosis following orthodontic therapy have been occasionally reported [8, 9], but this is unusual.…”

Section: Introductionmentioning

confidence: 99%

Incidence of pulp sensibility loss of anterior teeth after paramedian insertion of orthodontic mini-implants in the anterior maxilla

et al. 2017

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BackgroundThe aim of this retrospective investigation was to evaluate the incidence of loss to pulp sensibility testing (PST) of maxillary front teeth after paramedian (3 to 5 mm away from the suture) orthodontic mini-implant (OMI) insertion in the anterior palate.MethodsA total of 284 patients (102 males, 182 females; mean age was 14.4 years (±8.8) years at time of OMI-Insertion) with a total of 568 OMIs (1.7 mm diameter, length 8 mm) were retrospectively investigated. A binomial regression analysis was performed to explore covariates, such as age, gender, inclination of upper central incisors, dentition status and insertion position of OMIs that could have contributed to loss of sensibility. Statistical significance was set at p < 0.05.ResultsLoss of response to PST was encountered during retention in 3 out of 284 patients and the respective OMIs had been placed at height of the second rugae (R-2). Affected teeth were a right canine, a left lateral and a left central incisor. Subsequent root canal treatment was successful. Results of the binomial regression analysis revealed that the covariate insertion position (R-2) of OMIs (p = 0.008) had statistically significant influence on loss of response to PST.Conclusions(1) Although there was no radiographic evidence for direct root injury, the proximity of the implants to the anterior teeth was nevertheless statistically related to loss of PST. (2) In all cases of PST loss OMIs were inserted at the second rugae. Therefore OMIs should be placed either more posteriorly, at the third rugae or in the median plane. (3). Loss of PST was not increased for patients with palatal OMI (0.18%) compared to samples without OMI (0.25%).

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“… 13 Increased AST activity has been reported in the dental pulp, and in the GCF in cases of orthodontic treatment. 4 14 15 16 17 18 These results indicate that AST present in the dental pulp tissue might have a role in the early events leading to inflammatory changes. Most studies on the effects of orthodontic treatment on pulp have been relatively limited in duration, ranging from 20 seconds (sec) to 152 days.…”

Section: Introductionmentioning

confidence: 84%

Aspartate aminotransferase activity in the pulp of teeth treated for 6 months with fixed orthodontic appliances

Veberiene

Latkauskiene²,

Racinskaite

et al. 2015

Korean J Orthod

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ObjectiveTo measure aspartate aminotransferase (AST) activity in the pulp of teeth treated with fixed appliances for 6 months, and compare it with AST activity measured in untreated teeth.MethodsThe study sample consisted of 16 healthy subjects (mean age 25.7 ± 4.3 years) who required the extraction of maxillary premolars for orthodontic reasons. Of these, 6 individuals had a total of 11 sound teeth extracted without any orthodontic treatment (the control group), and 10 individuals had a total of 20 sound teeth extracted after 6 months of orthodontic alignment (the experimental group). Dental pulp samples were extracted from all control and experimental teeth, and the AST activity exhibited by these samples was determined spectrophotometrically at 20℃.ResultsMean AST values were 25.29 × 10-5 U/mg (standard deviation [SD] 9.95) in the control group and 27.54 × 10-5 U/mg (SD 31.81) in the experimental group. The difference between these means was not statistically significantly (p = 0.778), and the distribution of the AST values was also similar in both groups.ConclusionsNo statistically significant increase in AST activity in the pulp of mechanically loaded teeth was detected after 6 months of orthodontic alignment, as compared to that of teeth extracted from individuals who had not undergone orthodontic treatment. This suggests that time-related regenerative processes occur in the dental pulp.

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Effects of Intrusive Force on Selected Determinants of Pulp Vitality

Cited by 27 publications

References 27 publications

Peer Review #2 of "Age-related changes of dental pulp tissue after experimental tooth movement in rats (v0.1)"

Peer Review #2 of "Age-related changes of dental pulp tissue after experimental tooth movement in rats (v0.1)"

Incidence of pulp sensibility loss of anterior teeth after paramedian insertion of orthodontic mini-implants in the anterior maxilla

Aspartate aminotransferase activity in the pulp of teeth treated for 6 months with fixed orthodontic appliances

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